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Effects of Annealing Temperature on the structural,Optical,and Electrical Properties of ZnO Thin Films Grown on n-si<100>substrates by the sol–Gel spin Coating Method

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Acta Metallurgica sinica(English Letters) 2014年第4期27卷 682-688页

作者： Aniruddh Bahadur Yadav Amritanshu Pandey s.jit Department of Electronics Engineering Centre for Research in MicroelectronicsIndian Institute of Technology (Banaras Hindu University)

The effects of annealing temperature on the sol–gel-derived ZnO thin films deposited on n-sh100 i substrates by sol–gel spin coating method have been studied in this *** structural,optical,and electrical properties of ZnO thin films annealed at 450,550,and 650 °C in the Ar gas atmosphere have been investigated in a systematic *** XRD analysis shows a polycrystalline nature of the films at all three annealing ***,the crystallite size is observed to be increased with the annealing temperature,whereas the positions of various peaks in the XRD spectra are found to be red-shifted with the *** surface morphology studied through the scanning electron microscopy measurements shows a uniform distribution of ZnO nanoparticles over the entire si substrates of enhanced grain sizes with the annealing *** properties investigated by photoluminescence spectroscopy shows an optical band gap varying in the range of 3.28–3.15 eV as annealing temperature is increased from 450 to 650 °C,*** fourpoint probe measurement shows a decrease in resistivity from 2：1 10 2to 8：1 10 4X cm with the increased temperature from 450 to 650 °*** study could be useful for studying the sol–gel-derived ZnO thin film-based devices for various electronic,optoelectronic,and gas sensing applications.

关键词： Nanocrystalline ZnO thin film sol–gel Annealing surface morphology Photoluminescence(PL) Resistivity Grain size

On-current modeling of short-channel double-gate(DG) MOsFETs with a vertical Gaussian-like doping profile

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Journal of semiconductors 2013年第5期34卷 46-53页

作者： sarvesh Dubey Pramod Kumar Tiwari s.jit Department of Electronics Engineering Indian Institute of Technology(BHU)Varanasi-221005India Department of Electronics and Communication Engineering National Institute of Technology Rourkela-769008India

An analytic drain current model is presented for doped short-channel double-gate MOsFETs with a Gaussian-like doping profile in the vertical direction of the channel. The present model is valid in linear and satura- tion regions of device operation. The drain current variation with various device parameters has been demonstrated. The model is made more physical by incorporating the channel length modulation effect. Parameters like transcon- ductance and drain conductance that are important in assessing the analog performance of the device have also been formulated. The model results are validated by numerical simulation results obtained by using the commercially available ATLAs^TM, a two dimensional device simulator from sILVACO.

关键词： drain current DG MOsFET transconductance drain conductance

Analytical modeling of subthreshold current and subthreshold swing of Gaussiandoped strained-si-on-insulator MOsFETs

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Journal of semiconductors 2014年第8期35卷 52-59页

作者： Gopal Rawat sanjay Kumar Ekta Goel Mirgender Kumar sarvesh Dubey s.jit Department of Electronics Engineering Indian Institute of Technology (BHU) Varanasi India Faculty of Electronics and Communication Engineering Shri Ramswaroop Memorial University Lucknow-Deva Road India

This paper presents the analytical modeling of subthreshold current and subthreshold swing of short- channel fully-depleted （FD） strained-si-on-insulator （ssOI） MOsFETs having vertical Gaussian-like doping pro- file in the channel. The subthreshold current and subthreshold swing have been derived using the parabolic approx- imation method. In addition to the effect of strain on silicon layer, various other device parameters such as channel length （L）, gate-oxide thickness （tox）, strained-si channel thickness （ts_si）, peak doping concentration （Np）, project range （Rp） and straggle （op） of the Gaussian profile have been considered while predicting the device characteris- tics. The present work may help to overcome the degradation in subthreshold characteristics with strain engineering. These subthreshold current and swing models provide valuable information for strained-si MOsFET design. Ac- curacy of the proposed models is verified using the commercially available ATLAsTM, a two-dimensional （2D） device simulator from sILVACO.

关键词： strained-si-on-insulator (ssOI) Poisson's solution short-channel-effects

Engineering microscale systems for fully autonomous intracellular neural interfaces

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Microsystems & Nanoengineering 2020年第1期6卷 1276-1295页

作者： swathy sampath Kumar Michael s.Baker Murat Okandan jit Muthuswamy Biomedical Engineering School of Biological and Health Systems EngineeringArizona State UniversityTempeAZ 85287USA Mechanical Engineering Sandia National laboratoriesAlbuquerqueNMUSA mPower Technology Inc.AlbuquerqueNM 87102USA

Conventional electrodes and associated positioning systems for intracellular recording from single neurons in vitro and in vivo are large and bulky,which has largely limited their ***,acquiring successful intracellular recordings is very tedious,requiring a high degree of skill not readily achieved in a typical *** report here a robotic,MEMs-based intracellular recording system to overcome the above limitations associated with form factor,scalability,and highly skilled and tedious manual operations required for intracellular *** system combines three distinct technologies:(1)novel microscale,glass–polysilicon penetrating electrode for intracellular recording;(2)electrothermal microactuators for precise microscale movement of each electrode;and(3)closed-loop control algorithm for autonomous positioning of electrode inside single *** we demonstrate the novel,fully integrated system of glass–polysilicon microelectrode,microscale actuators,and controller for autonomous intracellular recordings from single neurons in the abdominal ganglion of Aplysia californica(n=5 cells).Consistent resting potentials(s(>60 mV)were recorded after each successful penetration attempt with the controller and microactuated glass–polysilicon *** success rate of penetration and quality of intracellular recordings achieved using electrothermal microactuators were comparable to that of conventional positioning *** data from in vivo experiments in anesthetized rats show successful intracellular *** MEMs-based system offers significant advantages:(1)reduction in overall size for potential use in behaving animals,(2)scalable approach to potentially realize multi-channel recordings,and(3)a viable method to fully automate measurement of intracellular *** system will be evaluated in vivo in future rodent studies.

关键词： recording electrode system

Enhanced strength in novel nanocomposites prepared by reinforcing graphene in red soil and fly ash bricks

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International Journal of Minerals,Metallurgy and Materials 2019年第10期26卷 1322-1328页

作者： jit sarkar D.K.Das Department of Metallurgical and Materials Engineering Indian Institute of TechnologyKharagpur 721302West BengalIndia Department of Mechanical Engineering Indian Institute of Technology(Indian School of Mines)Dhanbad 826004JharkhandIndia

Low-dimensional nanomaterials such as graphene can be used as a reinforcing agent in building materials to enhance the strength and durability. Common building materials burnt red soil bricks and fly ash bricks were reinforced with various amounts of graphene, and the effect of graphene on the strength of these newly developed nanocomposites was studied. The fly ash brick nanocomposite samples were cured as per their standard curing time, and the burnt red soil brick nanocomposite samples were merely dried in the sun instead of being subjected to the traditional heat treatment for days to achieve sufficient strength. The water absorption ability of the fly ash bricks was also discussed. The compressive strength of all of the graphene-reinforced nanocomposite samples was tested, along with that of some standard (without graphene) composite samples with the same dimensions, to evaluate the effects of the addition of various amounts of graphene on the compressive strength of the bricks.

关键词： graphene burnt red soil brick fly ash brick nanocomposites compressive strength

Comparison of fusion methods based on DsT and DBN in human activity recognition

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控制理论与应用（英文版） 2011年第1期9卷 18-27页

作者： Andrei TOLsTIKOV jit BIsWAs Chris NUGENT Guido PARENTE Institute for Infocomm Research Networking Protocols Department1 Fusionopolis Way#21-01Singapore 138632 school of Computing and Mathematics University of UlsterShore RoadNewtownabbeyBT37 0QBU.K.

Ambient assistive living environments require sophisticated information fusion and reasoning techniques to accurately identify activities of a person under care. In this paper, we explain, compare and discuss the application of two powerful fusion methods, namely dynamic Bayesian networks (DBN) and Dempster-shafer theory (DsT), for human activity recognition. Both methods are described, the implementation of activity recognition based on these methods is explained, and model acquisition and composition are suggested. We also provide functional comparison of both methods as well as performance comparison based on the publicly available activity dataset. Our findings show that in performance and applicability, both DsT and DBN are very similar; however, significant differences exist in the ways the models are obtained. DsT being top-down and knowledge-based, differs significantly in qualitative terms, when compared with DBN, which is data-driven. These qualitative differences between DsT and DBN should therefore dictate the selection of the appropriate model to use, given a particular activity recognition application.

关键词： Dynamic Bayesian networks Dempster-shafer theory Healthcare monitoring Ambient assisted living Activity recognition

分子氧条件下Co-ETs-10和Co-AM-6催化苯乙烯氧化生成氧化苯乙烯和苯甲醛（英文）

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催化学报 2015年第6期36卷 897-905页

作者： shuvo jit Datta Kyung Byung Yoon Korea Center for Artificial Photosynthesis Center for Nano Materials Department of Chemistry Sogang University

Pristine ETs-10 and AM-6 and their Co2+-exchanged forms were prepared, and their catalytic activities toward the oxidation of styrene in oxygen atmosphere were studied in dimethylformamide. The catalysts were denoted as Co-E10-n(n = 0, 9, 26, 68, 81) and Co-A6-m(m = 0, 8, 23, 63, 79), where n and m denote the degree of Co2+ exchange. The products of the oxidation process were identified as styrene epoxide(E) and benzaldehyde(B). Both the pristine forms, ETs-10(Co-E10-0) and AM-6(Co-A6-0), and Co2+-exchanged forms displayed catalytic activities. With increasing n or m, the conversion, and hence the rate, increased. specifically, the rates varied from 6.1 to 12.5 mmol·g-1·h-1with increasing n(Co-E10-n catalysts) and from 5.4 to 12.4 mmol·g-1·h-1 with increasing m(Co-A6-m catalysts). In contrast, the E/B ratio decreased with increasing n or m. More specifically,the E/B ratio decreased from 2.1 to 0.1 with increasing n from 0 to 81(Co-E10-n catalysts) and from 1.3 to 0.1 with increasing m from 0 to 79(Co-A6-m catalysts). Co-E10-9 displayed the highest E yield and Co-A6-79 generated the highest B yield. The highest turnover frequency obtained was 36.3 Co-1·h-1, which was the highest one obtained among those obtained for the Co2+-exchanged zeolites and mesoporous silica reference materials studied in this work.

关键词：苯乙烯氧化物活性催化剂苯甲醛分子氧二甲基甲酰胺介孔二氧化硅二氧化碳 N催化剂

The stress of COVID-19:Playing Havoc with the Hormones-A Review

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Journal of Endocrinology Research 2020年第2期2卷 1-8页

作者： sukhminder jit singh Bajwa Ridhima sharma Madhuri s Kurdi Department of Anaesthesiology and Intensive Care Gian Sagar Medical College and HospitalBanurPatialaPunjabIndia superspeciality Paediatric hospital and Postgraduate teaching institute NoidaUttar PradeshIndia Karnataka Institute Of Medical sciences(KIMs) HubliKarnatakaIndia

severe acute respiratory syndrome coronavirus-2(sARs-CoV-2)has affected millions of people across the world engendering an unprecedented *** disease(COVID)-19 can present asymptomatic or in the form of the acute respiratory syndrome,viral pneumonia,or *** to the novelty of the disease,the endocrine manifestations are not fully *** becomes indispensable to address the underlying endocrine disruptions contributing to the severe form of illness and thereby increasing the *** discuss here the sARs-CoV-2 virus and endocrine reverberations based on the research with structurally similar ***-CoV-2 enters the body via its attachment to the angiotensin-converting enzyme 2(ACE2)*** from lungs,ACE2 expression on various organs can lead to endocrine *** COVID-19 infection,pre-existing endocrine disorders warrant cautious management and may require replacement ***-19 and its repercussions on hormones are discussed extensively in this review.

关键词： Coronavirus disease(COVID)-19 Endocrine Hormones Pandemic severe acute respiratory syndrome coronavirus (sARs-CoV)-2

Computational Investigation of Multiband EMNZ Metamaterial Absorber for Terahertz Applications

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Computers, Materials & Continua 2022年第5期71卷 3905-3920页

作者： Ismail Hossain Md samsuzzaman Mohd Hafiz Baharuddin Norsuzlin Binti Mohd sahar Mandeep singh jit singh Mohammad Tariqul Islam space science Center Universiti Kebangsaan Malaysia43600UKM BangiSelangorMalaysia Department of Computer and Communication Engineering Faculty of Computer Science and EngineeringPatuakhali Science and Technology UniversityBangladesh Department of Electrical Electronic and Systems EngineeringFaculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaMalaysia

This study presents an Epsilon Mu near-zero(EMNZ)nanostructured metamaterial absorber(NMMA)for visible regime *** resonator and dielectric layers are made of tungsten(W)and quartz(fused),where the working band is expanded by changing the resonator layer’s *** to perfect impedance matching with plasmonic resonance characteristics,the proposed NMMA structure is achieved an excellent absorption of 99.99%at 571 THz,99.50%at 488.26 THz,and 99.32%at 598 THz *** absorption mechanism is demonstrated by the theory of impedance,electric field,and power loss density distributions,*** geometric parameters are explored and analyzed to show the structure’s performance,and a near-field pattern is used to explain the absorption mechanism at the resonance frequency *** numerical analysis method describes that the proposed structure exhibited more than 80%absorbability between 550 and 900 *** Computer simulation Technology(CsT Microwave studio 2019)software is used to design the proposed ***,CsTHFss interference is validated by the simulation data with the help of the finite element method(FEM).The proposed NMMA structure is also exhibits glucose concentration sensing capability as *** the proposed broadband absorber may have a potential application in THz sensing,imaging(MRI,thermal,color),solar energy harvesting,light modulators,and optoelectronic devices.

关键词： Metamaterial absorber terahertz applications multiband EM near zero nanostructured visible regime applications