Spin dependent electronic transport properties of zigzag black phosphorene nanojunctions induced by H, Li, O, Co asymmetric edge saturations
Publication date: Available online 11 November 2019Source: Physics Letters AAuthor(s): Aihemaitijiang Sidike, Guanghua Guo, Xiaobo Li, Dongde Li, Yaozhuang Nie, Biaobing Cao, Haiming Duan, Mengqiu LongAbstractTwo-dimensional (2D) material of few-layer black phosphorus (BP) has recently attracted extensive interest owing to its tunable band gap and high carrier mobility. We investigate the electronic transport properties of zigzag black phosphorene nanoribbons (ZBPNRs) with asymmetric H, Li, O and Co edge saturations by employing the density functional theory in combination with the non-equilibrium Green's function. The computational results forecast that different types of saturated atoms at both edge of ribbons mainly contribute to the electronic transport properties of molecular junctions. The metal edge saturation of Co atom is used to the one edge of ZBPNR which can induce an identical electronic transport property. Interestingly, the negative differential resistance (NDR) phenomena can be observed in our proposed ZBPNR junctions with an analysis of internal physical mechanism. Our theoretical results could support the possibility of potential applications to design 2D electronic devices based on the material of BP in future.
Publication date: Available online 9 December 2019Source: Journal of Physics and Chemistry of SolidsAuthor(s): Cristina Crupi, Giovanni Carini, Giuseppe Carini, Mauro Federico, Andrea Mandanici, Valentino Romano, Giovanna D'AngeloAbstractStructural changes of (Ag2O)x(B2O3)1-x glasses, over the range between X = 0.0 and X = 0.14, have been monitored by Raman spectroscopy. Low temperature heat capacity measurements have been also performed between 0.4 K and 25 K to investigate along with low frequency Raman scattering the behavior of the low-energy vibrational dynamics. A progressively decreasing intensity of the...
Authors: Ring B, Burbank AJ, Mills K, Ivins S, Dieffenderfer J, Hernandez ML Abstract Objectives: Objective measurements of asthma impairment could aid teens in recognition of changes in asthma status over time. Ready access to a conventional spirometer is not realistic outside of the clinical setting. In this proof-of-concept study, we compared the performance of the VitalFlo mobile spirometer to the nSpire KoKo® sx1000 spirometer for accuracy in measuring Forced Expiratory Volume in one second (FEV1) and Forced Vital Capacity (FVC) in adolescents with asthma.Methods: Two hundred forty pulmonary function measu...
Authors: Brignardello-Petersen R PMID: 31810520 [PubMed - as supplied by publisher]
Authors: Brignardello-Petersen R PMID: 31810519 [PubMed - as supplied by publisher]
Lawrence Mehren intends to retire as president and CEO of Tucson-based Accelerate Diagnostics Inc., effective Jan. 31, 2020. According to a U.S. Securities and Exchange Commission filing, Mehren will also give up his seat as a director of the publicly traded company, but will take on a part-time role with the medical diagnostics company immediately after his retirement. Mehren will be replaced as CEO by Jack Phillips, currently the company's chief operating officer, effective Feb. 1. Phillips,…
Org. Biomol. Chem., 2019, Accepted Manuscript DOI: 10.1039/C9OB02467K, PaperLuis R. Domingo, Mar Rios-Gutierrez, Patricia Perez The enhanced reactivity of a series of four aza aromatic compounds (AACs) participating in the Diels-Alder (DA) reactions with ethylene has been studied within the Molecular Electron Density Theory (MEDT).... The content of this RSS Feed (c) The Royal Society of Chemistry
Org. Biomol. Chem., 2019, Accepted Manuscript DOI: 10.1039/C9OB02415H, PaperXiahe Chen, Qunmin Wang, Hai-Min Shen, Guijie Li, Yun-Fang Yang, Yuan-Bin She The mechanism and origins of stereoselectivity of asymmetric benzylic C –H hydroxylation by Ru-porphyrin were elucidated with density functional theory calculations. The reaction proceeds via a hydrogen-atom abstraction/oxygen-rebound pathway, wherein a... The content of this RSS Feed (c) The Royal Society of Chemistry
[Radio Dabanga] Kassala -Dengue fever rates in Kassala last week recorded a marked decline, ranging from 36 to 90 cases per day.
[Radio Dabanga] Khartoum -On Thursday, a large medical convoy left the Sudanese capital, heading to the Nuba Mountains in South Kordofan where it will offer free treatment to the victims of war in the region.
[Daily Maverick] The Helen Suzman Foundation makes a case for the National Health Insurance Bill to be withdrawn.