Sensors, Vol. 19, Pages 4249: Strategies for Surface Modification with Ag-Shaped Nanoparticles: Electrocatalytic Enhancement of Screen-Printed Electrodes for the Detection of Heavy Metals

Sensors, Vol. 19, Pages 4249: Strategies for Surface Modification with Ag-Shaped Nanoparticles: Electrocatalytic Enhancement of Screen-Printed Electrodes for the Detection of Heavy Metals Sensors doi: 10.3390/s19194249 Authors: Karina Torres-Rivero Lourdes Torralba-Cadena Alexandra Espriu-Gascon Ignasi Casas Julio Bastos-Arrieta Antonio Florido Screen-printed carbon nanofiber electrodes (SPCNFEs) represent an alternative with great acceptance due to their results, as well as their low impact on the environment. In order to improve their performance, in the present work they were modified with silver nanoparticles (Ag-NPs) and electrochemically characterized by using anodic stripping voltammetry. From the Ag-NP synthesis, silver seeds (Ag-NS) and silver nanoprisms (Ag-NPr) were obtained. The Ag-NP formation was confirmed by micrographs, where Ag-NPs with diameters of 12.20 ± 0.04 nm for Ag-NS and 20.40 ± 0.09 nm for Ag-NPr were observed. The electrodes were modified by using three different deposition methods—drop-casting, spin-coating, and in situ approaches—that offer different nanoparticle distribution and electrode modification times. It was observed that the last methodology showed a low amount of Ag-NS deposited on the electrode surface and deep alteration of this surface. Those facts suggest that the in situ synthesis methodology was not appropriate for the determination of heavy metals, and it was discarded. T...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research

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Study Design. Retrospective cohort study. Objective. Compare a novel two-step algorithm for indicating a computed tomography angiography (CTA) in the setting of a cervical spine fracture with established gold standard criteria. Summary of Background Data. As CTA permits the rapid detection of blunt cerebrovascular injuries (BCVI), screening criteria for its use have broadened. However, more recent work warns of the potential for the overdiagnosis of BCVI, which must be considered with the adoption of broad criteria. Methods. A novel two-step metric for indicating CTA screening was compared with the American Coll...
Source: Spine - Category: Orthopaedics Tags: DIAGNOSTICS Source Type: research
Conclusions: The novel CI magnet is safe to use for MRI investigations of CI users in 3T MRI without a need for bandaging and has acceptable level of image artefacts.
Source: Otology and Neurotology - Category: ENT & OMF Tags: COCHLEAR IMPLANTS Source Type: research
Conclusion: Prominent anterior canal bulges are formed by posterior temporomandibular joints, not thicker bone. The scutum has asymmetric distances to various portions of the ossicles with the incus short process sometimes as close as 0.2 mm, placing it at risk of injury.
Source: Otology and Neurotology - Category: ENT & OMF Tags: BASIC SCIENCE Source Type: research
Conclusions: Homeless persons in high-income countries face multiple challenges to engaging in meaningful activity, which we argue is a disabling experience. Simultaneously, homeless persons demonstrate resilience by finding ways to engage in activities of meaning, and opportunities to connect with others in the face of multiple barriers.Significance: Implications for research and practice are discussed. PMID: 31718356 [PubMed - as supplied by publisher]
Source: Scandinavian Journal of Occupational Therapy - Category: Occupational Health Tags: Scand J Occup Ther Source Type: research
Publication date: Available online 14 November 2019Source: Materials Today: ProceedingsAuthor(s): Venkata Naga Baji Tokala, Sarat Babu MulpurAbstractComposite materials are the tailor- made multifunctional materials consisting of suitable physical and mechanical properties for the applications in various fields such as aerospace, sensitive electronic equipment, marine, civil construction, etc. In this work, a bio-waste derived composite material was synthesized using compression molding of cashew nut shell liquid (CNSL) (bio-waste resin) along with 3% paraformaldehyde, coconut coir, and sugarcane bagasse. Fibers separated ...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research
Publication date: Available online 14 November 2019Source: Materials Today: ProceedingsAuthor(s): Jaladi Nitchal Kiran, Modem Sreenivasulu, Konapala Sambasiva Rao, Kurapati Srinivasa Rao, Sangula Nagamani, Tummapudi NagamalleswariAbstractBismuth Layer Structured Ferroelectrics (BLSFs) have prominent technological applications as electronic materials. Strontium Bismuth Niobate (SBN) ceramics doped of rare earth elements SrBi2−xRxNb2O9 (R = Pr, Eu and x = 0.0, 0.2) have been synthesized by solid state reaction method between corresponding oxides and carbonate. The prepared ceramic samples are analysed by X-Ray ...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research
Publication date: Available online 14 November 2019Source: Materials Today: ProceedingsAuthor(s): P. Mayilsamy, S.P. Kumareshbabu, Kamal Nayan, S.A. SrinivasanAbstractThe copper alloys with conventional grain structure and size are soft materials with relatively low yield strength. The strength of copper based CMCs increases with the reinforcement addition. In the present experiment we have gone with Tin bronze as the matrix, an alloy of copper since it has got superior properties compared to copper due to the incorporation of Tin. The experiment revolves around the development of composite of Tin bronze with Rare Earth Ox...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research
Publication date: Available online 14 November 2019Source: Materials Today: ProceedingsAuthor(s): D. Prabhakaran, N. Jegadeeswaran, B. Somasundaram, B.S. RajuAbstractIn the parts of gas turbines, external degradations such as corrosion occur at places like turbine blades, when the temperature is high. The turbines become less operative and flare with sound because of the degradation due to corrosion. The thermocyclic hot corrosion performance of the 25%(Cr3C2-NiCr) + 75%NiCrAlY coatings as well as the cobalt based super alloy (Superco-605) substrate alloy was studied in a molten salt environment of Na2SO4 −50%V2O...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research
Publication date: Available online 13 November 2019Source: Materials Today: ProceedingsAuthor(s): R. Manikandan, S.P. Kumaresh Babu, M. Murali, A. VallimanalanAbstractAn investigation was carried in Nickel Aluminium Bronze (NAB) alloyed with Niobium (Nb) and Yttrium (Y) to study the effect of the microstructure for onshore applications. Nickel Aluminium Bronze is broadly used in aqueous atmospheres due to their good mechanical and corrosion resistance properties. The presence of destructive species in aqueous water initiates the corrosion of the engineering modules is inevitable. In-order to optimize the corrosion resistan...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research
Publication date: Available online 13 November 2019Source: Materials Today: ProceedingsAuthor(s): G. Wisz, P. Sawicka-Chudy, R. Yavorskyi, P. Potera, M. Bester, Ł. GłowaAbstractIn this work, TiO2/Cu2O heterostructures were obtained in a two-step process with a direct current magnetron sputtering method. We studied the morphological properties and composition of the thin films by scanning electron microscopy. Optical properties and energy bands at the heterojunction were recorded using a spectrophotometer. Additionally, the current–voltage characteristics examined in both total darkness and with illumination were es...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research
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