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CuO–TiO_(2) based self-powered broad band photodetector

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Nano Materials Science 2024年第3期6卷 345-354页

作者： Chiranjib Ghosh Arka Dey Iman Biswas rajeev Kumar gupta Vikram Singh Yadav Ashish Yadav Neha Yadav Hongyu Zheng Mohamed Henini Aniruddha Mondal Department of Physics National Institute of Technology DurgapurWest BengalIndia Department of Physics University of Petroleum&Energy Studies DehradunUttarakhandIndia Babasaheb Bhimrao Ambedkar University Lucknow226031India Center for Advanced Laser Manufacturing(CALM) Shandong University of TechnologyZibo255000PR China School of Physics and Astronomy University of NottinghamNottinghamNG72RDUnited Kingdom

An efficient room-temperature self-powered,broadband(300 nm–1100 nm)photodetector based on a CuO–TiO_(2)/TiO_(2)/p-Si(100)heterostructure is *** CuO–TiO_(2)nanocomposites were grown in a two-zone horizontal tube furnace on a 40 nm TiO_(2)thin film deposited on a p-type Si(100)*** CuO–TiO_(2)/TiO_(2)/p-Si(100)devices exhibited excellent rectification characteristics under dark and individual photoillumination *** devices showed remarkable photo-response under broadband(300–1100 nm)light illumination at zero bias voltage,indicating the achievement of highly sensitive self-powered photodetectors at visible and near-infrared light *** maximum response of the devices is observed at 300 nm for an illumination power of 10 *** response and recovery times were calculated as 86 ms and 78 ms,***,under a small bias,the devices showed a prompt binary response by altering the current from positive to negative under illumination *** main reason behind this binary response is the low turn-on voltage and photovoltaic characteristics of the *** illumination conditions,the generation of photocurrent is due to the separation of photogenerated electron-hole pairs within the built-in electric field at the CuO–TiO_(2)/TiO_(2)*** characteristics make the CuO–TiO_(2)/TiO_(2)broadband photodetectors suitable for applications that require high response speeds and self-sufficient functionality.

关键词： Self-powered CuO–TiO_(2) nanocomposite Broadband photodetector Two-zone horizontal tube furnace Responsivity

Electronic properties of 2D materials and their junctions

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Nano Materials Science 2024年第1期6卷 1-23页

作者： Taposhree Dutta Neha Yadav Yongling Wu Gary J.Cheng Xiu Liang Seeram Ramakrishna Aoussaj Sbai rajeev gupta Aniruddha Mondal Zheng Hongyu Ashish Yadav Department of Chemistry Indian Institute of Engineering Science and TechnologyShibpurWest Bengal711103India Center for Advanced Laser Manufacturing(CALM) Shandong University of TechnologyZibo255000PR China School of Industrial Engineering Purdue University315 N.Grant St.West LafayetteIN47907United States Birck Nanotechnology Center Purdue University1205 W State St.West LafayetteIN47907United States Advanced Materials Institute Qilu University of TechnologyShandong Academy of SciencesJinan250014PR China Nanoscience and Nanotechnology Initiative National University of Singapore10 Kent Ridge Crescent119260Singapore Faculty of Applied Phsyics and Mathematics Gdansk University of Technology Narutowicza 11/1280233GdanskPoland Department of Physics School of EngineeringUniversity of Petroleum&Energy StudiesDehradun248007UttarakhandIndia Department of Physics National Institute of Technology DurgapurDurgapur713209West BengalIndia

With an extensive range of distinctive features at nano meter-scale thicknesses,two-dimensional(2D)materials drawn the attention of the scientific *** tremendous advancements in exploratory research on 2D materials,knowledge of 2D electrical transport and carrier dynamics still in its ***,here we highlighted the electrical characteristics of 2D materials with electronic band structure,electronic transport,dielectric constant,carriers *** atomic thinness of 2D materials makes substantially scaled field-effect transistors(FETs)with reduced short-channel effects conceivable,even though strong carrier mobility required for high performance,low-voltage device *** also discussed here about factors affecting 2D materials which easily enhanced the activity of those materials for various ***,Those 2D materials used in state-of-the-art electrical and optoelectronic devices because of the extensive nature of their electronic band structure.2D materials offer unprecedented freedom for the design of novel p-n junction device topologies in contrast to conventional bulk *** also,describe the numerous 2D p-n junctions,such as homo junction and hetero junction including mixed dimensional ***,we talked about the problems and potential for the future.

关键词： 2D materials Electrical properties p-n junctions Mixed hereto junctions Homo junctions Electrical transport

Stability and weighted sensitivity analysis of robust controller for heat exchanger

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Control Theory and Technology 2020年第1期18卷 56-71页

作者： Sapna gupta rajeev gupta Subhransu PADHEE Department of Electronics Engineering Rajasthan Technical UniversityKotaRajasthanIndia Department of Electrical and Electronics Engineering Aditya Engineering College{Autonomous)SurampalemAndhra PradeshIndia

This study presents a parametric system identification approach to estimate the dynamics of a chemical plant from experimental data and develops a robust PID controller for the *** system identification of the heat exchanger system has been carried out using experimental data and prediction error *** estimated model of the heat exchanger system is a time-delay model and a robust PID controller for the time-delayed model has been designed considering weighted sensitivity *** mathematical background of parametric system identification,stability analysis,and H∞ weighted sensitivity analysis have been provided in this paper.A graphical plot has been provided to determine the stability region in the(Kp,Ki),(Kp,Kd)and(KuKd)*** stability region is a locus dependent on parameters of the controller and frequency,in the parameter plane.

关键词： Heat exchanger parametric system identification prediction error method PID controller robust stability analysis weighted sensitivity analysis

Co-inoculation of indigenous Pseudomonas oryzihabitans and Bradyrhizobium *** the growth,symbiotic efficacy,nutrient acquisition,and grain yield of soybean

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Pedosphere 2022年第3期32卷 438-451页

作者： Kailash Chand KUMAWAT Inderjeet SINGH Sharon NAGPAL Poonam SHARMA rajeev Kumar gupta Asmita SIRARI Department of Microbiology Punjab Agricultural UniversityLudhiana 141004(India) Department of Plant Breeding and Genetics Punjab Agricultural UniversityLudhiana 141004(India) Department of Soil Science Punjab Agricultural UniversityLudhiana 141004(India)

Soil microbes play a vital role in improving plant growth,crop productivity,and soil health through solubilization of essential *** investigation was conducted to access the efficacy of Bradyrhizobium ***-3 and the indigenous phosphate-solubilizing Pseudomonas oryzihabitans LSE-3 in improving the symbiosis,nutrient accumulation,and yield of *** isolate LSE-3,selected on the basis of phosphate solubilization,was screened for beneficial traits,antagonistic activities,and *** levels of indole acetic acid production(50.34±2.35μg mL^(-1)),phosphate solubilization(184.4±7.4 mg L^(-1)),biofilm formation(optical density at 560 mm,1.3896±0.04),siderophore production(121.46±1.61μg mL^(-1)),and 1-aminocyclopropane-1-carboxylate deaminase activity(0.51±0.07 mmolα-ketobutyrateμg^(-1) protein h^(-1))were significantly higher with the dual inoculants(LSBR-3 and LSE-3)than with the single inoculant *** plant growth-promoting traits of single and dual inoculants were evaluated for the synergistic effects on soybean under field *** plots treated with LSBR-3+LSE-3 exhibited improvement in seed germination,plant height,plant biomass,and chlorophyll content compared with the uninoculated *** inoculant treatments resulted in significantly higher symbiotic efficacy evidenced by increased nodulation(40.0±0.75 plant^(-1)),nodule biomass(188.52±6.29 mg plant^(-1)),and leghemoglobin content(11.02±0.83 mg g^(-1) fresh nodule),and significantly increased activities of phosphatase(75.16±3.17 and 58.77±6.08μg p-nitrophenol g^(-1) h^(-1) for alkaline and acid phosphatase,respectively)and dehydrogenase(32.66±1.92μg triphenylformazan g^(-1) h^(-1))compared with the *** inoculation with LSBR-3 and LSE-3 enhanced the uptake of macro-and micronutrients,reduced Na content in shoots,and resulted in 10.85%higher grain yield and ***$96.80 ha^(-1) higher profit compared with the *** is the first report on the effectiv

关键词： bacteria biofilm formation phosphate solubilization plant growth-promoting trait sustainable agriculture zinc solubilization

CuO–TiO2 based self-powered broad band photodetector

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Electronic properties of 2D materials and their junctions

纳米材料科学 2024年第3期 345页

作者： Chiranjib Ghosh Arka Dey Iman Biswas rajeev Kumar gupta Vikram Singh Yadav Ashish Yadav Neha Yadav Hongyu Zheng Mohamed Henini Aniruddha Mondal

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Regional variations in cardiovascular risk factors in India:India heart watch

纳米材料科学 2024年第1期 1页

作者： Taposhree Dutta Neha Yadav Yongling Wu Gary J.Cheng Xiu Liang Seeram Ramakrishna Aoussaj Sbai rajeev gupta Aniruddha Mondal Zheng Hongyu Ashish Yadav

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World Journal of Cardiology 2012年第4期4卷 112-120页

作者： rajeev gupta Soneil Guptha Krishna Kumar Sharma Arvind gupta Prakash Deedwania Department of Medicine Fortis Escorts HospitalJaipur 302017India Jaipur Heart Watch Foundation Jaipur 302017India Jaipur Diabetes Research Centre Jaipur 302017India Department of Cardiology VA Medical CenterUniversity of California San FranciscoFresnoCA 93701United States

Cardiovascular disease(CVD) is an important cause of mortality and morbidity in *** statistics and morbidity surveys indicate substantial regional variations in CVD prevalence and mortality *** from the Registrar General of India reported greater ageadjusted cardiovascular mortality in southern and eastern states of the *** heart disease(CHD) mortality is greater in south India while stroke is more common in the eastern Indian *** prevalence is higher in urban Indian populations while stroke mortality is similar in urban and rural ***-control studies in India have identified that the common major risk factors account for more than 90% of incident myocardial infarctions and *** case-control INTERHEART and INTERSTROKE studies reported that hypertension,lipid abnormalities,smoking,obesity,diabetes,sedentary lifestyle,low fruit and vegetable intake,and psychosocial stress are as important in India as in other populations of the *** studies have reported that there are substantial regional variations in risk factors in *** a macro-level these regional variations in risk factors explain some of the regional differences in CVD ***,there is need to study the prevalence of multiple cardiovascular risk factors in different regions of India and to correlate them with variations in CVD mortality using a uniform *** is also a need to determine the 'causes of the causes' or fundamental determinants of these risk *** India Heart Watch study has been designed to study socioeconomic,anthropometric and biochemical risk factors in urban populations in different regions of the country in order to identify regional differences.

关键词： Cardiovascular disease Risk factors Socioeconomics Epidemiology Hypertension Obesity Lipids

Antibacterial activities and corrosion behavior of novel PEO/nanostructured ZrO_2 coating on Mg alloy

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Transactions of Nonferrous Metals Society of China 2018年第8期28卷 1571-1581页

作者： Mohammadreza DAROONPARVAR Muhamad Azizi MAT YAJID rajeev KUMAR gupta Noordin MOHD YUSOF Hamid Reza BAKHSHESHI-RAD Hamidreza GHANDVAR Ehsan GHASEMI Department of Materials Manufacturing and Industrial EngineeringFaculty of Mechanical Engineering Universiti Tetalologi Malaysia 81310 Johor Bahru Johor Malaysia Department of Chemical and Biomilecular Engineering Corrosion Engineering Program The University of Akron Akron OH-44325 United States of America Advanced Materials Research Center Department of Materials Engineering Najafabad Branch Islamic Azad University Najafabad Iran Department of Clinical Sciences Faculty of Veterinary Medicine University of Tehran Tehran Iran

Plasma electrolytic oxidation（PEO） was developed as a bond coat for air plasma sprayed（APS） nanostructure ZrO2 as top coat to enhance the corrosion resistance and antibacterial activity of Mg alloy. Corrosion behavior and antibacterial activities of coated and uncoated samples were assessed by electrochemical tests and agar diffusion method toward Escherichia coli（E. coli） bacterial pathogens, respectively. The lowest corrosion current density and the highest charge transfer resistance, phase angle and impedance modulus were observed for PEO/nano-ZrO2 coated sample compared with those of PEO coated and bare Mg alloys. Nano-ZrO2 top coat which has completely sealed PEO bond coat is able to considerably delay aggressive ions transportation towards Mg alloy surface and significantly enhances corrosion resistance of Mg alloy in simulated body fluid（SBF） solution. Moreover, higher antibacterial activity was also observed in PEO/nano-ZrO2 coating against bacterial strains than that of the PEO coated and bare Mg alloys. This observation was attributed to the presence of ZrO2 nanoparticles which decelerate E. coli growth as a result of E. coli membranes.

关键词： Mg alloy ceramics coating materials microstructure scanning electron microscopy (SEM)

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UMA解决蜂窝网络和WLAN的融合之路

中国科技信息 2006年第6期 68-72页

作者： rajeev gupta Kineto Wireless公司网络产品工程部

UMA解决方案能够使服务提供商用一个移动设备、一个用户界面、一套同时处理语音和数据的公共网络服务,将蜂窝网络和无线局域网(Wi-Fi和蓝牙)合并成一套无缝的网络服务。UMA解决方案还可以融合蜂窝网络和任何基于IP的无线接入网络,例如IE... 详细信息

UMA解决方案能够使服务提供商用一个移动设备、一个用户界面、一套同时处理语音和数据的公共网络服务,将蜂窝网络和无线局域网(Wi-Fi和蓝牙)合并成一套无缝的网络服务。UMA解决方案还可以融合蜂窝网络和任何基于IP的无线接入网络,例如IEEE802.16(WiMAX)、IEEE802.20移动宽带无线接入(MBWA)和超宽带(UWB)网络。

关键词：移动台 IPSec UMA 核心网蜂窝网络 UNC 无线接入网络 VoIP GSM WLAN