In-situ production of Histamine-imprinted polymeric materials for electrochemical monitoring of fish
Publication date: Available online 20 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Verónica M. Serrano, Ana R. Cardoso, Mário Diniz, M. Goreti F. SalesAbstractHistamine (HIS) is a major public health problem due to its toxic properties. High levels can cause a chronic toxicity as poisoning and can be used as a signal of food hygiene. Thus, a new electrochemical sensor for HIS detection in fish is presented herein, prepared by tailoring a molecularly imprinted polymer (MIP) sensing material on a gold screen-printed electrode (Au-SPEs), in which the polymeric film was generated in-situ. This...
Source: Sensors and Actuators B: Chemical - February 21, 2020 Category: Chemistry Source Type: research

Simultaneous detection of streptomycin and kanamycin based on an all-solid-state potentiometric aptasensor array with a dual-internal calibration system
Publication date: Available online 21 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Juan Yu, Wanxin Tang, Fan Wang, Fan Zhang, Qingjiang Wang, Pingang HeAbstractA novel potentiometric aptasensor array based on a 4-channel screen-printed carbon electrode was developed with a dual-internal calibration system for the simultaneous detection of streptomycin and kanamycin. Two channels were used as working channels for assembling the aptamers of the two targets, and the other two channels acted as calibration channels. The calibration channels functioned by immobilizing two all-A sequences were employed to sub...
Source: Sensors and Actuators B: Chemical - February 21, 2020 Category: Chemistry Source Type: research

Long Range Surface Plasmons assisted highly sensitive and room temperature operated NO2 gas sensor
Publication date: Available online 20 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Surbhi Jain, Ayushi Paliwal, Vinay Gupta, Monika TomarAbstractLong Range Surface Plasmons (LRSPs) are excited in the SnO2/Au/SnO2/prism structure using Kretschmann configuration for detecting NO2 gas. SnO2 thin films of two different thicknesses are grown by RF sputtering technique and 205 nm thin SnO2 film resulted in the sharp LRSP resonance (LRSPR) reflectance curve with the minimum reflectance (Rmin) = 0.05 at the resonance angle (θspr) of 42.38°. LRSPR based room temperature (22°C) operated gas sensor u...
Source: Sensors and Actuators B: Chemical - February 20, 2020 Category: Chemistry Source Type: research

NiMoO4 nanoparticles decorated carbon nanofiber membranes for the flexible and high performance glucose sensors
Publication date: Available online 20 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): S. Divya Rani, R. Ramachandran, Sunirmal Sheet, Md. Abdul Aziz, Yang Soo Lee, Abdullah G. Al-Sehemi, Mehboobali Pannipara, Yang Xia, Shu-Yi Tsai, Fong-Lee Ng, Siew-Moi Phang, G. Gnana KumarAbstractThe free-standing and flexible carbonaceous nanofiber membrane (CNF) comprising of NiMoO4 nanoparticles decorated carbon fibers were developed for glucose sensing analysis. The applicability of polymeric nanofiber membranes in electrochemical sensors is accelerated by enhancing their electrical conductivity via carbonization pro...
Source: Sensors and Actuators B: Chemical - February 20, 2020 Category: Chemistry Source Type: research

Two quenching groups are better than one: a robust strategy for constructing HOCl fluorescent probe with minimized background fluorescence and ultra-high sensitivity and its application of HOCl imaging in living cells and tissues
We report herein fluorescent probes equipped with dual-quenching groups exhibiting superior sensitivity than probes with mono-quenching groups. Importantly, with this strategy, the probe with dual-quenching groups react with HOCl through two distinct reaction mechanisms, which reduce the plausible side reactions with other competing analytes and enhance the probe’s selectivity. As a proof-of-concept study, we designed and synthesized a probe with dual-quenching groups DQ-HOCl to detect HOCl, which is one of the most important ROS and linked with a number of diseases. In addition, two control probes with mono-quenchin...
Source: Sensors and Actuators B: Chemical - February 18, 2020 Category: Chemistry Source Type: research

A multicolor-SERS dual-mode pH sensor based on smart nano-in-micro particles
Publication date: Available online 17 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Ying Liu, Shuai Yue, Ya-Ning Wang, Yue Wang, Zhang-Run XuAbstractA multicolor and surface-enhanced Raman scattering (SERS) dual-mode pH sensing method based on microparticles was proposed, which combined the advantages of high sensitivity of SERS and convenience of colorimetric visualization. Polyethylene glycol diacrylate microgels were fabricated using a T-channel microfluidic chip, and the polyaniline-coated gold nanorods were encapsulated in the microgels. Based on the nano-in-micro particles, pH monitoring within the...
Source: Sensors and Actuators B: Chemical - February 18, 2020 Category: Chemistry Source Type: research

Luminescent macrocyclic Sm(III) complex probe for turn-off fluorescent and colorimetric water detection in organic solvents and liquid fuels
Publication date: Available online 17 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Kun Zhang, Ting-Ting Chen, Yin-Jing Shen, Lin-Feng Zhang, Shuang Ma, Yan HuangAbstractThe rapid and sensitive detection of water has attracted wide interests in the chemical and energy industry for its harmful influences, which encourage researchers to explore kinds of materials for sensing water. Herein, we report the sensing performance of a Schiff-base macrocyclic Sm(III) complex Sm-2g as the turn-off fluorescent and colorimetric probe for water detection in organic solvents (DMF, methanol and acetone) and liquid fuels...
Source: Sensors and Actuators B: Chemical - February 18, 2020 Category: Chemistry Source Type: research

Signal Amplified Photoelectrochemical Assay Based on Polypyrrole/g-C3N4/WO3 Inverse Opal Photonic Crystals Triple Heterojunction Assembled through Sandwich-type Recognition Model
Publication date: Available online 17 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Xueming Dang, Zhilian Song, Huimin ZhaoAbstractA novel photoelectrochemical (PEC) sensing strategy with an amplified signal was proposed based on polypyrrole/g-C3N4/WO3 inverse opal photonic crystals triple heterojunction. The sandwich-type detection model was applied to increase the sensitivity and favor the assembly of heterojunction structure. The heterojunction among PPy, g-C3N4 and WO3 highly improved the separation of photo-generated charges. Meanwhile, WO3 IOPCs with good optical performance were employed to enhanc...
Source: Sensors and Actuators B: Chemical - February 18, 2020 Category: Chemistry Source Type: research

Multiwavelength optical sensor based on a gradient photonic crystal with a hexagonal plasmonic array
Publication date: Available online 14 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Lina Dedelaite, Raul D. Rodriguez, Benjamin Schreiber, Arunas Ramanavicius, Dietrich R.T. Zahn, Evgeniya SheremetAbstractSensitivity and versatility are characteristics that make a sensor device attractive for wide-spread applications in everyday life. Surface-enhanced Raman spectroscopy (SERS) is capable of providing the highest sensitivity, that of single-molecule detection, and excellent specificity due to its fingerprinting capability. However, conventional SERS substrates must be optimized to operate for a particular...
Source: Sensors and Actuators B: Chemical - February 15, 2020 Category: Chemistry Source Type: research

Unique 3D Heterostructures Assembled by Quasi-2D Ni-MOF and CNTs for Ultrasensitive Electrochemical Sensing of Bisphenol A
In this study, quasi-2D Ni-based organic frames (Ni-MOF) nanosheets were easily obtained for the confinement effect of the cross-linked CNTs networks, and the Ni-MOF@CNTs hybrids with unique 3D heterostructures was then facilely in-situ prepared at room temperature. Benefiting from the large specific surface area of Ni-MOF, excellent conductivity of CNTs and the synergistic effect, the as-synthesized 3D Ni-MOF@CNTs hybrids showed superior electrochemical activity toward the oxidation and sensing of highly toxic environmental contaminant bisphenol A (BPA). Ultra-low detection limit of 0.35 nM and high sensitivity of ...
Source: Sensors and Actuators B: Chemical - February 15, 2020 Category: Chemistry Source Type: research

Plasmonic enhanced photoelectrochemical aptasensor with D-A F8BT/g-C3N4 heterojunction and AuNPs on a 3D-printed device
Publication date: Available online 14 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Shuzhen Lv, Kangyao Zhang, Qian Zhou, Dianping TangAbstractD-A F8BT/g-C3N4 type II heterojunction nanocomposite was employed as photoelectrode material for photoelectrochemical (PEC) aptasensor based on rolling circle amplification (RCA) with the assistance of 3D-printed device for carcinoembryonic antigen (CEA) detection. D-A type F8BT improved photocurrent response of g-C3N4 nanosheet after forming D-A F8BT/g-C3N4 type II heterojunction which effectively constructed built-in electric field and reduced electron-hole reco...
Source: Sensors and Actuators B: Chemical - February 15, 2020 Category: Chemistry Source Type: research

Portable glucose meter-based label-free strategy for target DNA detection
Publication date: Available online 15 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Hyo Yong Kim, Jun Ki Ahn, Ki Soo Park, Hyun Gyu ParkAbstractWe herein developed a portable glucose meter (PGM)-based method for label-free target DNA detection, which relies on the cascade enzymatic reaction (CER) promoted by hexokinase and pyruvate kinase to link the amount of deoxynucleoside triphosphate (dNTP) with the glucose level. In the absence of target DNA or the presence of non-target DNA, the initial high concentration of dNTP, a phosphate source for hexokinase, is maintained because polymerase chain reaction (...
Source: Sensors and Actuators B: Chemical - February 15, 2020 Category: Chemistry Source Type: research

Fluidic barriers in droplet-based centrifugal microfluidics: generation of multiple emulsions and microspheres
Publication date: Available online 15 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Masoud Madadelahi, Marc J Madou, Yeganeh Dorri Nokoorani, Amir Shamloo, Sergio O Martinez-ChapaAbstractDroplet generation is very important in biochemical processes such as cell encapsulation, digital PCR (Polymerase Chain Reaction), and drug delivery. In the present paper, a density-based method called “fluidic barrier” is introduced to produce multiple emulsions on a centrifugal microfluidic platform or Lab-on-a-CD (LOCD). We show that the density and the viscosity of the fluids involved are important parame...
Source: Sensors and Actuators B: Chemical - February 15, 2020 Category: Chemistry Source Type: research

Editorial Board
Publication date: 15 April 2020Source: Sensors and Actuators B: Chemical, Volume 309Author(s): (Source: Sensors and Actuators B: Chemical)
Source: Sensors and Actuators B: Chemical - February 15, 2020 Category: Chemistry Source Type: research

A highly sensitive SERS quenching nanosensor for the determination of Tumor necrosis factor alpha in blood
Publication date: Available online 13 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Mahnaz D. Gholami, Prashant Sonar, Godwin A. Ayoko, Emad L. IzakeAbstractTumor necrosis factor alpha (TNF-α) is a cytokine that plays a critical role in medical conditions such cardiovascular diseases, rheumatoid arthritis, inflammatory bowel disease, Alzheimer’s and cancer. Herein, we present a new method for the determination of TNF-α by surface enhanced Raman spectroscopy (SERS). A new benzothiazole azo dye (BAN) was used as a Raman probe to detect the cytokine after its selective extraction from bloo...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

A chemically modified laser-induced porous graphene based flexible and ultrasensitive electrochemical biosensor for sweat glucose detection
Publication date: Available online 13 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Hyosang Yoon, Joongsan Nah, Hyunsik Kim, Seokgyu Ko, Md Sharifuzzaman, Sharat Chandra Barman, Xing Xuan, Jiyoung Kim, Jae Yeong ParkAbstractPorous laser-induced graphene (LIG) is an attractive and promising carbon material for electrochemical applications because it can immobilize various proteins, such as enzymes, antibodies, and receptors. However, poor inherent electrical properties caused by low surface conductivity is still a critical drawback for various applications. Here, we have proposed a surface modification me...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

On the Robustness of Field calibration for Smart air quality monitors
Publication date: Available online 13 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Saverio De Vito, Elena Esposito, Nuria Castell, Philipp Schneider, A. BartonovaAbstractThe robustness of field calibrated Air Quality Multi-sensors (AQM) performances to long term and/or mobile operation is still debated. Though accuracy generally exceeds the one of laboratory calibrations models, experimental results show that field calibration models cannot sustain optimal field performances due to changes occurring in operative conditions. Among them, the relocation of calibrated multi-sensors platforms and sensor drif...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

Gas-sensing behaviors of TiO2-layer-modified SnO2 quantum dots in self-heating mode and effects of the TiO2 layer
Publication date: Available online 13 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Jae-Hyoung Lee, Ali Mirzaei, Jae-Hun Kim, Jin-Young Kim, Abulkosim F. Nasriddinov, Marina. N. Rumyantseva, Hyoun Woo Kim, Sang Sub KimAbstractSnO2 quantum dots (QDs) were synthesized, after which, TiO2 was deposited to produce TiO2-layer-modified SnO2 QDs. The TiO2 layer was deposited by atomic layer deposition (ALD); by controlling the number of ALD cycles, the thickness of the TiO2 layer was adjusted to 10, 30, or 60 nm. The synthesized products were characterized to demonstrate the formation of TiO2-layer-modifi...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

Numerical Investigation of the Secondary Flow Effect of Lateral Structure of Micromixing Channel on Laminar Flow
Publication date: Available online 13 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Huanhuan Shi, Yali Zhao, Zhengchun LiuAbstractMicromixing remains challenge for microfluidic applications. Stretching or folding of laminar flows by precise structure could improve micromixing but meanwhile increase the pressure drop and fabrication cost. The outward lateral structure on micromixing channel has been adopted as a mild way to promote micromixing at low Reynolds condition, which was especially suitable for micromixing of trace precious reagent at low flow rate. Herein, this paper presents the numerical inves...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

A data-driven meat freshness monitoring and evaluation method using rapid centroid estimation and hidden Markov models
Publication date: Available online 14 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Taoping Liu, Wentian Zhang, Mitchell Yuwono, Miao Zhang, Maiken Ueland, Shari L. Forbes, Steven W. SuAbstractThe food industry needs a fast and stable method to monitor and evaluate the freshness of meat products. This paper proposes the use of a metal-oxide-semiconductor (MOS) sensor-based electronic nose with a data-driven approach, hidden Markov models (HMMs), to detect meat spoilage. The data-driven approach we proposed include: i) A training algorithm using segmental rapid centroid estimation (RCE) to increase the ov...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

Generation of graphite nanomaterials from pencil leads with the aid of a 3d positioning sparking device: application to the voltammetric determination of nitroaromatic explosives
We report on facile generation of graphite nanomaterials (GNMs) with advanced electro catalytic properties through a direct electric discharge process between pencil leads and graphite screen − printed electrodes (SPEs) at ambient conditions at 1.2 kV. Various commercially available pencil leads of different degrees of hardness were examined. Sparked GNM − SPEs were characterized by Raman spectroscopy, SEM, CV, and EIS. Taking as criterion the highest response to the electro-reduction of nitro group of 2,4,6−trinitrotoluene (TNT) at −0.3 V at deoxygenated so...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

Ratiometric Fluorescence Sensing of Copper Ion and Enzyme Activity by Nanoprobe-Mediated Autocatalytic Reaction and Catalytic Cascade Reaction
Publication date: Available online 14 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Ping Dong, Yahua Liu, Yun Zhao, Wenxiao Wang, Min Pan, Yu Liu, Xiaoqing LiuAbstractDespite the tremendous potential of ratiometric method, its development has been limited by challenges such as the lack of signal amplification. Ratiometric sensing that is highly reliable, sensitive and selective would greatly facilitate optical analysis. Inspired by the natural biocatalysis and cascade catalysis, we demonstrate that the nanoprobe-mediated ratiometric detection coupled with autocatalytic reaction enables fluorescence sensi...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

Visualized characterization of bacterial penicillin G acylase for the hydrolysis of β-lactams using an activatable NIR fluorescent probe
Publication date: Available online 14 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Zhenhao Tian, Lei Feng, Lu Li, Xiangge Tian, Jingnan Cui, Houli Zhang, Chao Wang, Huilian Huang, Baojing Zhang, Xiaochi MaAbstractPenicillin G acylase (PGA) identified from bacteria, is used as industrial biocatalyst for the hydrolysis of penicillins along with the production of 6-aminopenicillanic acid, a key intermediate of the semi-synthetic β-lactam antibiotics. Due to wide usage of PGA, some novel homology bioactive enzymes are investigated in various bacteria, and visualized analysis technique would be necessar...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

The enhanced performance of capacitive-type humidity sensors based on ZnO nanorods/WS2 nanosheets heterostructure
In this study, n-type semiconducting tungsten disulfide (WS2) was utilized to form ZnO nanorods/WS2 nanosheets heterostructure grown on indium tin oxide coplanar electrode-coated glass substrate. The capacitive-type humidity sensing characteristics were investigated at room temperature. The results show that for humidity ranges of 18–85 % RH, three deposition cycles of WS2 nanosheets onto ZnO nanorods produced significant improvements in the response, sensitivity, and hysteresis with an unchanged response and recovery times compared to pristine ZnO sensors. This improved sensor performance might be due to the ability...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

Development of dual strip biosensors based on hybridization chain reaction and microplate strategies for signal amplification of HBV-DNA detection
In this study, microplate amplification and hybridization chain reaction (HCR) were used to improve the sensitive detection of HBV-DNA on dual strip biosensors. For the microplate-based amplification strategy on RS strip, the dual-DNA-AuNP probe could be immobilized on SA-Biotin-Anti-HBV-DNA-1 covered microplate through HBV-DNA. By adding dithiothreitol (DTT), a large amount of HS-RS-DNA on the dual-DNA-AuNP probe was dissociated. The indirect detection of HS-RS-DNA on RS strip could achieve the signal amplification of HBV-DNA. For the HCR-based strategy on HCR strip, HBV-DNA triggered the cascade reaction of H1-AuNP probe...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

Metal-Organic Frameworks-Derived Bamboo-Like CuO/In2O3 Heterostructure for High-Performance H2S Gas Sensor with Low Operating Temperature
Publication date: Available online 5 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Sihan Li, Lili Xie, Meng He, Xiaobing Hu, Guifang Luo, Cheng Chen, Zhigang ZhuAbstractHydrogen sulfide (H2S) sensors with excellent response and selectivity are in great demand to monitor its concentration changes in the real environment, especially at an ultra-trace level. This work presents a metal-organic framework (MOF)-derived metal oxide prepared via the solvothermal method and the developed sensors based on such materials exhibits enhanced gas-sensing performance. The bamboo-like CuO/In2O3 derived from Cu2+-impregna...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

Silk: a bio-derived coating for optical fiber sensing applications
Publication date: Available online 12 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Asma Khalid, Lu Peng, Azim Arman, Stephen C. Warren-Smith, Erik P. Schartner, Georgina M. Sylvia, Mark R. Hutchinson, Heike Ebendorff-Heidepriem, Robert A. McLaughlin, Brant C. Gibson, Jiawen LiAbstractOptical fiber chemical sensing is generally achieved through attachment of sensor molecules to the fiber, a process that involves chemicals that are not biologically compatible or are limited to thin monolayer coatings. To address these limitations and enable in-vivo biosensing, we report here, for the first time, silk fibr...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

Hierarchical Mo2C@MoS2 Nanorods as Electrochemical Sensors for Highly Sensitive Detection of Hydrogen Peroxide and Cancer Cells
Publication date: Available online 12 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Yijin Shu, Lingli Zhang, Huaihong Cai, Yang Yang, Jiachang Zeng, Dong Ma, Qingsheng GaoAbstractHeterostructures hierarchically integrating various building blocks are promising to construct sensitive and versatile biosensing platforms. Herein, hierarchical Mo2C@MoS2 consisting of interlayer-expanded MoS2 nanosheets wrapping on Mo2C nanorods is developed as a sensitive and bifunctional electrochemical platform to detect cellular metabolism products (e.g., H2O2) and cancer cells. Utilizing the merits of one-dimensional Mo2C...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

Autocatalytic replicated Mg2+-ligation DNAzyme as robust biocatalyst for sensitive, label-free and enzyme-free electrochemical biosensing of protein
Publication date: Available online 12 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Yumeng Liao, Shijing Guo, Xiaoyu Hua, Ruo Yuan, Wenju XuAbstractHerein, an enzyme- and label-free electrochemical aptasensor was developed for the amplified detection of protein (mucin 1, MUC1 as tested model) by utilizing autocatalytic and catabolic Mg2+-ligation DNAzyme as robust biocatalyst. The MUC1-affinity aptamer sequence is encoded in DNA hairpin 1 (HP1). The combined product of HP1 with MUC1 triggers the formation of active Mg2+-dependent DNAzyme in the presence of sequence-specific ssDNA (S1) and hairpin 2 (HP2)...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

Functionalized graphene fiber modified by dual nanoenzyme: towards high-performance flexible nanohybrid microelectrode for electrochemical sensing in live cancer cells
Publication date: Available online 12 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Anshun Zhao, Jun She, Devaraj Manoj, Taoqun Wang, Yimin Sun, Yan Zhang, Fei XiaoAbstractThe development of flexible miniaturized electrochemical sensors based on functionalized microelectrode systems has gained numerous attentions for their promising application in potable, implantable and wearable medical devices. In this work, we report a facile strategy to construct a new type of high-performance microelectrode based on wet-spinning graphene fiber (GF) functionalized by dual nanoenzyme composed of ultrafine Au nanopart...
Source: Sensors and Actuators B: Chemical - February 14, 2020 Category: Chemistry Source Type: research

Development of a reliable and selective voltammetric method for determination of designer drug 1-(3-chlorophenyl)piperazine (mCPP) using boron-doped diamond electrode and exploiting surfactant-mediated measurements
Publication date: Available online 5 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Luana Rianne Rocha, Jhessica de Cássica Mendonça, Tainara Boareto Capelari, Roberta Antigo Medeiros, César Ricardo Teixeira TarleyAbstract1-(3-chlorophenyl) piperazine (mCPP) is a drug abuse and its considered as one of the most well-known piperazine derivatives, exhibiting ecstasy-like stimulants and hallucinogenic effects, thereby its determination in drugs seized is of paramount importance. Electroanalysis offers a good alternative for in situ testing on seized samples, but the development of new el...
Source: Sensors and Actuators B: Chemical - February 13, 2020 Category: Chemistry Source Type: research

The dual-function of hematite-based photoelectrochemical sensor for solar-to-electricity conversion and self-powered glucose detection
Publication date: Available online 7 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Lihua He, Qingsong Zhang, Chunli Gong, Hai Liu, Fuqiang Hu, Fei Zhong, Guangjin Wang, Honghui Su, Sheng Wen, Shengchang Xiang, Bingqing ZhangAbstractPhotoelectrochemical (PEC) glucose sensing has been developed as a novel promising electrochemical approach for advanced analysis due to the advantages of high sensitivity and selectivity as well as good stability. Here, we present a Fe2O3 nanorod (Fe2O3NR)-based PEC sensor, which shows excellent performance in glucose detection for the concentrations in the range of 0.2∼2...
Source: Sensors and Actuators B: Chemical - February 13, 2020 Category: Chemistry Source Type: research

A portable microfluidic analyzer for integrated bacterial detection using visible loop-mediated amplification
In this study, a portable analyzer was developed to rapidly and simultaneously detect five types of foodborne bacteria (Staphylococcus aureus, Salmonella, Shigella, enterotoxigenic Escherichia coli, and Pseudomonas aeruginosa) on a centrifugal chip. Integration of the processes, including bacteria lysis, visible loop-mediated amplification (LAMP) and detection, was accomplished within 70 minutes. The analyzer has a compact size (151 × 134 × 110 mm) and two motors positioned on both sides of the centrifugal chip. The upper motor was used to generate a rotating magnetic f...
Source: Sensors and Actuators B: Chemical - February 13, 2020 Category: Chemistry Source Type: research

Graphene Assisted Terahertz Metamaterials for Sensitive Bio-sensing
We report that single-stranded deoxyribonucleic acids (ssDNAs) at very low concentrations can be detected using graphene-combined nano-slot-based terahertz (THz) resonance. A combination of the resonant structure and tuned electro-optical properties of graphene can provide unprecedentedly sensitive biomolecule sensing even using very low energy THz photons, overcoming the huge scale difference of 10000:1 between the wavelength and the size of the ssDNAs. Ultrahigh sensitivity is obtained by the significant increase in the absorption cross-section of the graphene sheet with the targeted biomolecules, induced by strong THz f...
Source: Sensors and Actuators B: Chemical - February 13, 2020 Category: Chemistry Source Type: research

Solvent directed discrimination of metal ions using a coumarin-pyridine fluorescence receptor
Publication date: Available online 10 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Zhiyuan Cao, Xia Fan, Zhiyu Yang, Xuebin Zhang, Ningxujin Ding, Yubin Ding, Weihua ZhangAbstractThe development of reliable methods for large scale discrimination of versatile metal ions is meaningful to avoid metal poisoning accidents and investigate their biological roles. Herein, a solvent directed strategy is reported for readily construction of a robust and powerful fluorescent sensor array R1SA for effective metal ion discrimination. The four sensors of R1SA were obtained by simply dissolving a unique coumarin-pyrid...
Source: Sensors and Actuators B: Chemical - February 13, 2020 Category: Chemistry Source Type: research

A Pocket-Sized 3D-printed Attenuated Total Reflection-Infrared Filtometer combined with Functionalized Silica Films for Nitrate Sensing in Water
Publication date: Available online 10 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Bettina Baumgartner, Stephan Freitag, Christoph Gasser, Bernhard LendlAbstractStrong anion-exchange materials carry a positive charge that allows them to trap and concentrate anions while releasing other anions. Here, we introduced a quaternary ammonium anion exchange group into mesoporous silica films coated on attenuated total reflection (ATR) crystals to enrich nitrate from aqueous phase in the volume probed by the evanescent field. The ion-exchange and enrichment capabilities of the films were characterized using FTIR...
Source: Sensors and Actuators B: Chemical - February 13, 2020 Category: Chemistry Source Type: research

Ratiometric fluorescence detection of dopamine based on effect of ligand on the emission of Ag nanoclusters and aggregation-induced emission enhancement
Publication date: Available online 11 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Yu Ling, Lei Wang, Xing Yue Zhang, Xiao Hu Wang, Jiao Zhou, Zhe Sun, Nian Bing Li, Hong Qun LuoAbstractFor small size metal nanoclusters, it is expected that template ligand will play an essential role in regulating the properties and structure. Using histidine (His) templated Ag nanoclusters and glutathione (GSH) and dihydrolipoic acid (DHLA) protected silver nanoclusters as models, due to the different electron donating abilities of different ligands, two silver nanoclusters with similar sizes have fluorescence emission...
Source: Sensors and Actuators B: Chemical - February 13, 2020 Category: Chemistry Source Type: research

Sensor Array Based on Carbon Dots for ATP-related Physiological Phosphates Detecting and ATP Hydrolysis Monitoring
Publication date: Available online 11 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Shun Hu, Xiaona Li, Kai Wang, Qiuhua Wu, Guolin Zhang, Xue LiuAbstractA simple indicator displacement assay (IDA)-based array system was established by using Fe(III)-responsive fluorescent carbon dots (CDs) and Fe(III) to detect ATP-related physiological phosphates (PPs) and monitor ATP hydrolysis. The analysis was based on principal component analysis of differential CDs fluorescence regulated by Fe(III)/PPs complexes. By two modeling methods, two sensor arrays were established. That is, three CDs/one Fe(III) concentrati...
Source: Sensors and Actuators B: Chemical - February 13, 2020 Category: Chemistry Source Type: research

Exhaled air analysis as a potential fast method for early diagnosis of dengue disease
In this study, we report for the first time the possibility of identification of possible biomarkers associated with dengue disease in the exhaled air, and of the development of a breath test for fast, non-invasive and easy diagnosis of this disease. Further, we demonstrate a new deployable sensor technology based on a chemoresistive metal-ligand nanoassembly tailored for the identified possible biomarkers of dengue disease, which achieved 100% accuracy for dengue diagnosis on our study group and can be used in both specialist and non-specialist settings. Nevertheless, as the present study was performed on a limited number...
Source: Sensors and Actuators B: Chemical - February 13, 2020 Category: Chemistry Source Type: research

Synthesis, characterization, DFT study, conductivity and effects of humidity on CO2 sensing properties of the novel tetrakis-[2-(dibenzylamino)ethoxyl] substituted metallophthalocyanines
Publication date: Available online 11 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Sema Şenoğlu, Metin Özer, Fatih Dumludağ, Nursel Acar, Bekir Salih, Özer BekaroğluAbstractNovel tetrakis-[2-(dibenzylamino)ethoxyl] substituted nickel (II), cobalt (II) and manganese (II) phthalocyanines were synthesized by using 4-(2-(dibenzylamino)ethoxy)phthalonitrile with corresponding metal salts in 2-N, N-dimethylaminoethanol. New phthalonitrile ligand was prepared from 2-(dibenzylamino)ethan-1-ol and 4-nitrophthalonitrile in acetonitrile at reflux temperature using potassium carbonate as catalyst. The...
Source: Sensors and Actuators B: Chemical - February 13, 2020 Category: Chemistry Source Type: research

Recent trends in surface plasmon resonance based fiber–optic gas sensors utilizing metal oxides and carbon nanomaterials as functional entities
Publication date: 1 May 2020Source: Sensors and Actuators B: Chemical, Volume 310Author(s): Rana Tabassum, Ravi KantAbstractRapid industrialization and urbanization have unequivocally eased the lives of people to an appreciable extent, which however, has been achieved at the cost of an unprecedented degradation and pollution of natural environment. The continual high–concentration subjection of various gases and organic vapours instigated by their large–scale production plus consumption as raw materials in myriad industrial processes intensely jeopardizes living beings, aquatic life, food and water resources, a...
Source: Sensors and Actuators B: Chemical - February 13, 2020 Category: Chemistry Source Type: research

Functional silica nanospheres for sensitive detection of H9N2 avian influenza virus based on immunomagnetic separation
Publication date: 1 May 2020Source: Sensors and Actuators B: Chemical, Volume 310Author(s): Fanwei Luo, Chao Long, Zhen Wu, Huayu Xiong, Miaomiao Chen, Xiuhua Zhang, Wei Wen, Shengfu WangAbstractElectrochemiluminescence (ECL) has been widely used in detection of biomarkers. However, the lacks of efficient ECL emitter and anti-interference ability limit its clinical application. Here, a sensitive ECL immunosensor was proposed for H9N2 avian influenza virus (H9N2 AIV) detection using functional silica nanospheres as signal carriers and magnetic nanobeads (MBs) as capture carriers. Functional silica nanospheres were prepared ...
Source: Sensors and Actuators B: Chemical - February 13, 2020 Category: Chemistry Source Type: research

Sputter deposited p-NiO/n-SnO2 porous thin film heterojunction based NO2 sensor with high selectivity and fast response
Publication date: 1 May 2020Source: Sensors and Actuators B: Chemical, Volume 310Author(s): Kiruba Mangalam S., Ann Susan Jose, Prajwal K., Prasanta Chowdhury, Harish C. BarshiliaAbstractIn this work, we report fabrication and characterization of porous, single layer n-SnO2, p-NiO and bilayer thin film heterojunction devices developed using pulsed DC magnetron sputtering for NO2 detection. Template-free, NiO/SnO2 heterojunction devices were deposited both in top-bottom and in-plane electrode configurations. All the devices showed an optimum sensing temperature of 200 °C. Systematic comparison of the fabricated devices ...
Source: Sensors and Actuators B: Chemical - February 13, 2020 Category: Chemistry Source Type: research

A Non-Optical Multiplexed PCR Diagnostic Platform for Serotype-Specific Detection of Dengue Virus
We report an integrated multiplexed PCR chip platform with a novel ion-selective membrane sensor array that eliminates the key selectivity and sensitivity issues for multiplexed PCR, such as primer dimerization and nonspecific amplification (mis-priming). The depletion action of the ion-selective membrane renders the sensor insensitive to pH and ionic strength variation or non-specific binding, which plague the current electrochemical sensor arrays. We validate the platform with robust, sensitive and selective detection of each of the four dengue virus (DENV) serotypes, even in the presence of misprimed non-target products...
Source: Sensors and Actuators B: Chemical - February 11, 2020 Category: Chemistry Source Type: research

Colorimetric/SERS Dual-Mode Detection of Mercury Ion via SERS-Active Peroxidase-Like Au@AgPt NPs
Publication date: Available online 10 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Chunyuan Song, Jinxiang Li, Youzhi Sun, Xinyu Jiang, Jingjing Zhang, Chen Dong, Lianhui WangAbstractThe development of mercury ion (Hg2+) probes integrating the ability of facile preliminary evaluation and high-sensitive accurate assay with wide detection range is very important for water pollution prevention and human health. Herein, a novel colorimetric/SERS dual-mode detection of Hg2+ was proposed by using the SERS-active peroxidase-like Au@AgPt NPs. The Au@AgPt NP has hexoctahedral Au nanoparticle core with edges coat...
Source: Sensors and Actuators B: Chemical - February 11, 2020 Category: Chemistry Source Type: research

A sensitive electrochemiluminescence biosensor based on metal-organic framework and imprinted polymer for squamous cell carcinoma antigen detection
Publication date: Available online 10 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Guichun Mo, Dongmiao Qin, Xiaohua Jiang, Xiangfei Zheng, Weiming Mo, Biyang DengAbstractAn electropolymerized dopamine molecularly imprinted polymer (MIP) electrochemiluminescence (ECL) biosensor was constructed to detect squamous cell carcinoma antigen (SCCA). Besides having a large surface area, which allows the loading of more ZnSe quantum dots (ZnSeQDs), Fe(III)-MIL-88B-NH2 metal organic framework (MOF) is an efficient co-reaction accelerator that facilitates the transition of S2O82- into SO4-. As a result, the signal...
Source: Sensors and Actuators B: Chemical - February 11, 2020 Category: Chemistry Source Type: research

Integrated Dual-Signal Aptasensor Based On Magnet-Driven Operations and Miniaturized Analytical Device For On-Site Analysis
Publication date: Available online 10 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Ying Gu, Jinwen Li, Kun Qian, Zhen Zhang, Shuo Wang, Junping WangAbstractA novel dual-signal sensing system was developed for on-site analysis. A custom-built miniaturized workstation coupled with a home-made magneto-electrochemical detection module was employed for electrochemical sensing. The miniaturized workstation could be controlled by smartphone and all devices and tools in this integrated dual-signal biosensing platform were portable, which applies to on-site analysis. Meanwhile, by simple separation, color respon...
Source: Sensors and Actuators B: Chemical - February 11, 2020 Category: Chemistry Source Type: research

A tetradecylphosphonium compounds–based membrane sensor for potentiometric quantitation of pertechnetate-ions in cementitious radioactive waste
Publication date: Available online 10 February 2020Source: Sensors and Actuators B: ChemicalAuthor(s): A.V. Kopytin, K.E. German, K.Y. Zhizhin, A.V. Safonov, A.F. Zhukov, L.K. ShpigunAbstractA novel potentiometric sensor has been developed for the determination of pertechnetate ions (TсO4‾) by using on two synthesized tetradecylphosphonium salts, tetradecylphosphonium pertechnetate and tetradecylphosphonium tetraphenylborate, as sensing components of a poly (vinyl chloride) matrix membrane. Potentiometric studies have confirmed the improvement in response characteristics of the sensor based on the membrane system co...
Source: Sensors and Actuators B: Chemical - February 11, 2020 Category: Chemistry Source Type: research

Real time detection of Hg2+ ions using MoS2 functionalized AlGaN/GaN high electron mobility transistor for water quality monitoring
Publication date: 15 April 2020Source: Sensors and Actuators B: Chemical, Volume 309Author(s): Adarsh Nigam, Neeraj Goel, Thirumaleshwara N Bhat, Md. Tawabur Rahman, Surani Bin Dolmanan, Qiquan Qiao, Sudhiranjan Tripathy, Mahesh KumarAbstractA sensor for highly sensitive, selective, and rapid determination of the trace amount of toxic Hg2+ ions is developed for the first-time using molybdenum disulfide (MoS2) functionalized AlGaN/GaN high electron mobility transistor (HEMT). The vertically aligned, flower-like MoS2 structures are synthesized through a simple hydrothermal route and applied on the gate region of AlGaN/GaN HE...
Source: Sensors and Actuators B: Chemical - February 11, 2020 Category: Chemistry Source Type: research

Single-cell classification of foodborne pathogens using hyperspectral microscope imaging coupled with deep learning frameworks
Publication date: 15 April 2020Source: Sensors and Actuators B: Chemical, Volume 309Author(s): Rui Kang, Bosoon Park, Matthew Eady, Qin Ouyang, Kunjie ChenAbstractA high-throughput hyperspectral microscope imaging (HMI) technology with hybrid deep learning (DL) framework defined as “Fusion-Net” was proposed for rapid classification of foodborne bacteria at single-cell level. HMI technology is useful in single-cell characterization, providing spatial, spectral and combined spatial-spectral profiles with high resolution. However, direct analysis of these high-dimensional HMI data is challenging. In this work, HMI...
Source: Sensors and Actuators B: Chemical - February 11, 2020 Category: Chemistry Source Type: research