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Mobility bands

Yunfang Jia, Fang Li
Functional nucleic acids (FNAs) are promising sensing elements, extensive interests are excited to integrate FNAs with transducers for biochemical assays. However, efforts for FNAs modified light-addressable-potentiometric-sensor (FNA-LAPS) are rarely reported. LAPS is a versatile transducer with electrolyte-insulator-semiconductor (EIS) structure, can respond almost any surface electronic deviations. Herein, organized studies for FNA-LAPS including experiments, theoretical derivations and MEDICI (Synopsys®) simulations, are presented using Pb2+ -DNAzyme GR-5 and Ag+ -aptamer as proof-of-concepts, which are typical FNAs with distinctive sensing strategies...
March 21, 2018: Analytical Chemistry
Gurleen Kaur Walia, Deep Kamal Kaur Randhawa
The adsorption behavior of sulfur-based toxic gases (H2 S and SO2 ) on armchair silicene nanoribbons (ASiNRs) was investigated using first-principles density functional theory (DFT). Being a zero band gap material, application of bulk silicene is limited in nanoelectronics, despite its high carrier mobility. By restricting its dimensions into one dimension, construction of nanoribbons, and by introduction of a defect, its band gap can be tuned. Pristine armchair silicene nanoribbons (P-ASiNRs) have a very low sensitivity to gas molecules...
March 16, 2018: Journal of Molecular Modeling
A H Reshak
Comprehensive ab initio calculations from first- to second-principles methods are performed to investigate the suitability of non-centro-symmetric CdLa2 S4 and CdLa2 Se4 to be used as active photocatalysts under visible light illumination. The calculations reveal the direct band gap nature of both compounds with large absorption coefficients (104 -105 cm-1 ). The absorption edges of CdLa2 S4 and CdLa2 Se4 occur at λ = 579.3 nm and λ = 670.1 nm, and the optical band gaps are estimated to be 2.14 eV and 1.85 eV for CdLa2 S4 and CdLa2 Se4 , respectively...
March 15, 2018: Physical Chemistry Chemical Physics: PCCP
Dae-Myeong Geum, SangHyeon Kim, SooSeok Kang, Hosung Kim, Hwanyeol Park, Il Pyo Rho, Seung Yeop Ahn, Jindong Song, Won Jun Choi, Euijoon Yoon
In this paper, InAs0.81 Sb0.19 -based hetero-junction photovoltaic detector (HJPD) with an In0.2 Al0.8 Sb barrier layer was grown on GaAs substrates. By using technology computer aided design (TCAD), a design of a barrier layer that can achieve nearly zero valance band offsets was accomplished. A high quality InAs0.81 Sb0.19 epitaxial layer was obtained with relatively low threading dislocation density (TDD), calculated from a high-resolution X-ray diffraction (XRD) measurement. This layer showed a Hall mobility of 15,000 cm2 /V⋅s, which is the highest mobility among InAsSb layers with an Sb composition of around 20% grown on GaAs substrates...
March 5, 2018: Optics Express
Jia-Jhen Kang, Tsung-Yu Yang, Yi-Kang Lan, Wei-Ru Wu, Chun-Jen Su, Shih-Chang Weng, Norifumi L Yamada, An-Chung Su, U-Ser Jeng
Cathode buffer layers (CBLs) can effectively further the efficiency of polymer solar cells (PSCs), after optimization of the active layer. Hidden between the active layer and cathode of the inverted PSC device configuration is the critical yet often unattended vertical diffusion of the active layer components across CBL. Here, a novel methodology of contrast variation with neutron and anomalous X-ray reflectivity to map the multicomponent depth compositions of inverted PSCs, covering from the active layer surface down to the bottom of the ZnO-based CBL, is developed...
March 2, 2018: Small
Thea Radüntz
Electroencephalogram (EEG) registration as a direct measure of brain activity has unique potentials. It is one of the most reliable and predicative indicators when studying human cognition, evaluating a subject's health condition, or monitoring their mental state. Unfortunately, standard signal acquisition procedures limit the usability of EEG devices and narrow their application outside the lab. Emerging sensor technology allows gel-free EEG registration and wireless signal transmission. Thus, it enables quick and easy application of EEG devices by users themselves...
2018: Frontiers in Physiology
Kathryn Iammarino, James Marrie, Mitchell Selhorst, Linda P Lowes
Background: Ankle injuries account for up to 40% of all sport related injuries. These injuries can result in weeks to months of missed sport or work. The PRICE (Protection, Rest, Ice, Compression, Elevation) treatment is standard care for most acute ankle sprains. Recently, early mobilization in adults has been shown to decrease time off from sport or work, and the likelihood of developing chronic instability. To date, no research has been performed assessing the effectiveness of early mobilization in pediatric patients (<18 years)...
February 2018: International Journal of Sports Physical Therapy
Weiming Lv, Bingchao Yang, Bochong Wang, Wenhui Wan, Yanfeng Ge, Ruilong Yang, Chunxue Hao, Jianyong Xiang, Baoshun Zhang, Zhongming Zeng, Zhongyuan Liu
Black phosphorus (BP) has drawn great attention owing to its tunable band gap depending on thickness, high mobility and large on/off ratio, which makes BP attractive for using in future two-dimensional electronic and optoelectronic devices. However, its instability under ambient conditions poses challenge to the research and limits its practical applications. In this work, we present a feasible approach to suppress the degradation of BP by sulfur (S) doping. The fabricated S-doped BP few layer field-effect transistors (FETs) show more stable transistors performance under ambient conditions...
February 26, 2018: ACS Applied Materials & Interfaces
Catherine B Anders, Josh E Eixenberger, Nevil A Franco, Rebecca J Hermann, Katherine D Rainey, Jordan J Chess, Alex Punnoose, Denise G Wingett
ZnO nanoparticles (nZnO) are commonly used in nanotechnology applications despite their demonstrated cytotoxicity against multiple cell types. This underscores the significant need to determine the physicochemical properties that influence nZnO cytotoxicity. In this study, we analyzed six similarly sized nZnO formulations, along with SiO2 -coated nZnO, bulk ZnO and ZnSO4 as controls. Four of the nZnO samples were synthesized using various wet chemical methods, while three employed high-temperature flame spray pyrolysis (FSP) techniques...
February 1, 2018: Environmental Science. Nano
Marina Piscopo, Rosaria Notariale, Dea Rabbito, Juan Ausió, Oladokun Sulaiman Olanrewaju, Giulia Guerriero
In this work, we describe results of the reproductive health monitoring studies in Mytilus galloprovincialis following spermatozoa hsp70 expression and protamine-like protein properties. Mussels control (ctr) were released within cages for 30 days in three different marine sites near Naples (Campania, Italy): Bagnoli south (BAs) and Bagnoli north (BAn), both close to a disposal metallurgical factory and in Capo Miseno (CM). Studies of hsp70 gene expression carried out, by RT-qPCR, in mussel spermatozoa have shown varied expression levels, particularly 5, 13, and 15-fold more than ctr in CM, BAs, and BAn, respectively, indicating highest involvement of stress proteins in spermatozoa of mussels in Bagnoli...
February 24, 2018: Environmental Science and Pollution Research International
Chawloon Thu, Philipp Ehrenreich, Ka Kan Wong, Eugen Zimmermann, James Dorman, Wei Wang, Azhar Fakharuddin, Martin Putnik, Charalampos Drivas, Aimilios Koutsoubelitis, Maria Vasilopoulou, Leonidas C Palilis, Stella Kennou, Julian Kalb, Thomas Pfadler, Lukas Schmidt-Mende
ZnO is a widely used metal-oxide semiconductor for photovoltaic application. In solar cell heterostructures they not only serve as a charge selective contact, but also act as electron acceptor. Although ZnO offers a suitable interface for exciton dissociation, charge separation efficiencies have stayed rather poor and conceptual differences to organic acceptors are rarely investigated. In this work, we employ Sn doping to ZnO nanowires in order to understand the role of defect and surface states in the charge separation process...
February 23, 2018: Scientific Reports
Zhenwei Wang, Hyunho Kim, Husam N Alshareef
2D MXenes have shown great promise in electrochemical and electromagnetic shielding applications. However, their potential use in electronic devices is significantly less explored. The unique combination of metallic conductivity and hydrophilic surface suggests that MXenes can also be promising in electronics and sensing applications. Here, it is shown that metallic Ti3 C2 MXene with work function of 4.60 eV can make good electrical contact with both zinc oxide (ZnO) and tin monoxide (SnO) semiconductors, with negligible band offsets...
February 23, 2018: Advanced Materials
Juan Camilo Molano-Arevalo, Walter Gonzalez, Kevin Jeanne Dit Fouque, Jaroslava Miksovska, Philippe Maitre, Francisco Fernandez-Lima
Nicotinamide adenine dinucleotide (NAD) is found in all living cells where the oxidized (NAD+ ) and reduced (NADH) forms play important roles in many enzymatic reactions. However, little is known about NAD+ and NADH conformational changes and kinetics as a function of the cell environment. In the present work, an analytical workflow is utilized to study NAD+ and NADH dynamics as a function of the organic content in solution using fluorescence lifetime spectroscopy and in the gas-phase using trapped ion mobility spectrometry coupled to mass spectrometry (TIMS-MS) and infrared multiple photon dissociation (IRMPD) spectroscopy...
February 23, 2018: Physical Chemistry Chemical Physics: PCCP
S Lerch, D Stark, O Rühmann
OBJECTIVE: Snapping of the iliotibial band over the greater trochanter should be eliminated by reducing tension via lengthening, release, and incision of the iliotibial band. INDICATIONS: Positive clinical examination and painful snapping of the iliotibial band over the greater trochanter, despite extensive conservative treatments, for over 6 months. CONTRAINDICATIONS: Weakness of the abductor muscles with positive Trendelenburg sign. SURGICAL TECHNIQUE: Direct approach to the iliotibial tract...
February 22, 2018: Operative Orthopädie und Traumatologie
Xue-Peng Wang, Xian-Bin Li, Nian-Ke Chen, Ji-Hong Zhao, Qi-Dai Chen, Hong-Bo Sun
External electric fields can be used to manipulate the electronic properties of two-dimensional (2D) materials. 2D InSe semiconductors possess high electron mobility and wide band gap tunability. Therefore, they have been proposed for use in ultrathin electronic devices. Here, using first-principles calculations, we study the charge polarization, structure, electronic structure, and gas adsorption of an InSe monolayer under vertical electric fields. We find that both the structural evolution and charge polarization rely on the directions of the electric fields...
February 21, 2018: Physical Chemistry Chemical Physics: PCCP
Anis Ben Arfi, Fahmi Elsayed, Pouya M Aflaki, Brad Morris, Fadhel M Ghannouchi
In this paper, a dual-branch topology driven by a Delta-Sigma Modulator (DSM) with a complex quantizer, also known as the Complex Delta Sigma Modulator (CxDSM), with a 3-level quantized output signal is proposed. By de-multiplexing the 3-level Delta-Sigma-quantized signal into two bi-level streams, an efficiency enhancement over the operational frequency range is achieved. The de-multiplexed signals drive a dual-branch amplification block composed of two switch-mode back-to-back power amplifiers working at peak power...
February 20, 2018: Sensors
Chuan Zhang, Zuo-Jun Zhang, Lei Wang, Zhong-Xiao Chang, Lin-Ping Yang, Ming Zhao, Xing-Xing Li, Rui-Ping Feng, Guo-Jie Wang, Xiao-Bo Duan
OBJECTIVE: To explore the therapeutic effects of distal humeral lateral closing wedge osteotomy followed by modified pinning combined with external tension band fixation in the treatment of cubitus varus deformity in children. METHODS: Total 26 adult patients with cubitus varus deformity were treated by operation from March 2011 to June 2015, 15 patients were boys and the other 11 patients were girls, ranging in age from 4 to 13 years, with an average of 7.8 years...
August 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
S Ray, A Ghosh, S Sinha
Motivated by the recent experiment by Bordia et al. [Nat. Phys. 13, 460 (2017)NPAHAX1745-247310.1038/nphys4020], we study the single particle delocalization phenomena of the Aubry-André (AA) model subjected to periodic drives. In two distinct cases we construct an equivalent classical description to illustrate that the drive-induced delocalization phenomena stems from an instability and the onset of chaos in the underlying dynamics. In the first case we analyze the delocalization and the thermalization in a time modulated AA potential with respect to driving frequency and demonstrate that there exists a threshold value of the amplitude of the drive...
January 2018: Physical Review. E
Brijesh Kumar Singh, Shweta Tripathi
We report the growth of stable p-type ZnO thin films obtained by doping bismuth (Bi) in ZnO and deposited over ITO coated glass substrate. The Bi doped ZnO thin films have been deposited by a sol-gel spin coating method using zinc acetate and bismuth nitrate as main precursors. The structural, optical and electrical properties of annealed Bi doped thin films have been studied in detail using X-ray diffraction (XRD), Atomic force microscopy (AFM), ellipsometry, hot probe system and Hall measurement. The presence of strong diffraction peak along (101) obtained from the XRD spectra shows that the high-quality Bi doped ZnO nanostructures grow along (101) orientation...
June 1, 2018: Journal of Nanoscience and Nanotechnology
Yogajivan Rout, Rajneesh Misra, Rahul Singhal, Subhayan Biswas, Ganesh D Sharma
We have used two unsymmetrical small molecules, named phenothiazine 1 and 2 with a D-A-D-π-D configuration, where phenothiazine is used as a central unit, triphenylamine is used as a terminal unit and TCBD and cyclohexa-2,5-diene-1,4-diylidene-expanded TCBD are used as an acceptor between the phenothiazine and triphenylamine units, as a small molecule donor along with PC71BM as an acceptor for solution processed bulk heterojunction solar cells. The variation of acceptors in the phenothiazine derivatives makes an exciting change in the photophysical and electrochemical properties, hole mobility and therefore photovoltaic performance...
February 13, 2018: Physical Chemistry Chemical Physics: PCCP
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