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CuO–TiO_(2) based self-p.wered broad band p.otodetector

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

作者： Chiranjib Ghosh Ark. Dey Iman Biswas Rajeev k.mar Gup.a Vik.am Singh Yadav Ashish Yadav Neha Yadav Hongyu Zheng Mohamed Henini Aniruddha mondal Dep.rtment of p.ysics National Institute of Technology DurgapurWest BengalIndia Dep.rtment of p.ysics University of Petroleum&Energy Studies DehradunUttarakhandIndia Babasaheb Bhimrao Ambedk.r University Lucknow226031India Center for Advanced Laser Manufacturing(CALM) Shandong University of TechnologyZibo255000PR China School of p.ysics and Astronomy University of NottinghamNottinghamNG72RDUnited Kingdom

An efficient room-temp.rature self-p.wered,broadband(300 nm–1100 nm)p.otodetector based on a CuO–TiO_(2)/TiO_(2)/p.Si(100)heterostructure is *** CuO–TiO_(2)nanocomp.sites were grown in a two-zone horizontal tube furnace on a 40 nm TiO_(2)thin film dep.sited on a p.typ. Si(100)*** CuO–TiO_(2)/TiO_(2)/p.Si(100)devices exhibited excellent rectification characteristics under dark.and individual p.otoillumination *** devices showed remark.ble p.oto-resp.nse under broadband(300–1100 nm)light illumination at zero bias voltage,indicating the achievement of highly sensitive self-p.wered p.otodetectors at visible and near-infrared light *** maximum resp.nse of the devices is observed at 300 nm for an illumination p.wer of 10 *** resp.nse and recovery times were calculated as 86 ms and 78 ms,***,under a small bias,the devices showed a p.omp. binary resp.nse by altering the current from p.sitive to negative under illumination *** main reason behind this binary resp.nse is the low turn-on voltage and p.otovoltaic characteristics of the *** illumination conditions,the generation of p.otocurrent is due to the sep.ration of p.otogenerated electron-hole p.irs within the built-in electric field at the CuO–TiO_(2)/TiO_(2)*** characteristics mak. the CuO–TiO_(2)/TiO_(2)broadband p.otodetectors suitable for ap.lications that require high resp.nse sp.eds and self-sufficient functionality.

关键词： Self-p.wered CuO–TiO_(2) nanocomp.site Broadband p.otodetector Two-zone horizontal tube furnace Resp.nsivity

Electronic p.op.rties 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： Tap.shree Dutta Neha Yadav Yongling Wu Gary J.Cheng Xiu Liang Seeram Ramak.ishna Aoussaj Sbai Rajeev Gup.a Aniruddha mondal Zheng Hongyu Ashish Yadav Dep.rtment 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 Ap.lied p.syics and Mathematics Gdansk.University of Technology Narutowicza 11/1280233GdanskPoland Dep.rtment of p.ysics School of EngineeringUniversity of Petroleum&Energy StudiesDehradun248007UttarakhandIndia Dep.rtment of p.ysics National Institute of Technology DurgapurDurgapur713209West BengalIndia

With an extensive range of distinctive features at nano meter-scale thick.esses,two-dimensional(2D)materials drawn the attention of the scientific *** tremendous advancements in exp.oratory research on 2D materials,k.owledge of 2D electrical transp.rt and carrier dynamics still in its ***,here we highlighted the electrical characteristics of 2D materials with electronic band structure,electronic transp.rt,dielectric constant,carriers *** atomic thinness of 2D materials mak.s substantially scaled field-effect transistors(FETs)with reduced short-channel effects conceivable,even though strong carrier mobility required for high p.rformance,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 op.oelectronic devices because of the extensive nature of their electronic band structure.2D materials offer unp.ecedented freedom for the design of novel p.n junction device top.logies in contrast to conventional bulk.*** also,describe the numerous 2D p.n junctions,such as homo junction and hetero junction including mixed dimensional ***,we talk.d about the p.oblems and p.tential for the future.

关键词： 2D materials Electrical p.op.rties p.n junctions Mixed hereto junctions Homo junctions Electrical transp.rt

Elevated cardiovascular risk.and acute events in hosp.talized colon cancer survivors:A decade-ap.rt study of two nationwide cohorts

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World Journal of Clinical Oncology 2024年第4期15卷 548-553页

作者： Rup.k.Desai Avilash mondal Vivek.p.tel Sandeep.Singh Shaylik. Chauhan Ak.il Jain Indep.ndent Researcher AtlantaGA 30079United States Dep.rtment of Internal Medicine Nazareth HospitalPhiladelphiaPA 19152United States Dep.rtment of Clinical Ep.demiology Biostatistics and Bio-informaticsAmsterdam UMCAmsterdam 7057Netherlands Dep.rtment of Internal Medicine Geisinger Health SystemWikes-BarrePA 18702United States Division of Leuk.mia The University of Texas MD Anderson Cancer CenterHoustonTX 77079United States

BACk.ROUND Over the years,strides in colon cancer detection and treatment have boosted survival rates;yet,p.st-colon cancer survival entails cardiovascular disease(CVD)*** on CVD risk. and acute cardiovascular events in colorectal cancer survivors has been *** To comp.re the CVD risk.and adverse cardiovascular outcomes in current colon cancer survivors comp.red to a decade *** We analyzed 2007 and 2017 hosp.talization data from the National Inp.tient Samp.e,studying two colon cancer survivor group. for CVD risk.factors,mortality rates,and major adverse events lik. p.lmonary embolism,arrhythmia,cardiac arrest,and strok.,adjusting for confounders via multivariable regression *** Of total colon cancer survivors hosp.talized in 2007(n=177542)and 2017(n=178325),the 2017 cohort often consisted of younger(76 vs 77 years),male,African-American,and Hisp.nic p.tients admitted non-electively vs the 2007 ***,the 2017 cohort had higher rates of smok.ng,alcohol abuse,drug abuse,coagulop.thy,liver disease,weight loss,and renal *** in the 2017 cohort also had higher rates of cardiovascular comorbidities,including hyp.rtension,hyp.rlip.demia,diabetes,obesity,p.rip.eral vascular disease,congestive heart failure,and at least one traditional CVD(p.0.001)vs the 2007 *** adjusted multivariable analysis,the 2017 cohort had a significantly higher risk.of p.lmonary embolism(p.)(OR:1.47,95%CI:1.37-1.48),arrhythmia(OR:1.41,95%CI:1.38-1.43),atrial fibrillation/flutter(OR:1.61,95%CI:1.58-1.64),cardiac arrest including ventricular tachyarrhythmia(OR:1.63,95%CI:1.46-1.82),and strok.(OR:1.28,95%CI:1.22-1.34)with comp.rable all-cause mortality and fewer routine discharges(48.4%vs 55.0%)(p.0.001)vs the 2007 *** Colon cancer survivors hosp.talized 10 years ap.rt in the United States showed an increased CVD risk.with an increased risk.of acute cardiovascular events(strok. 28%,p. 47%,arrhythmia 41%,and cardiac arres

关键词： Colon cancer Colorectal cancer Cardiovascular diseases Cardiovascular disease risk Cardiac events Strok.

Effect of Al-TiB master alloy addition on microstructure, wear and comp.essive deformation behaviour of aluminum alloys

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Transactions of Nonferrous Metals Society of China 2012年第5期22卷 1001-1011页

作者： D.p.mondal Nidhi JHA Anshul BADk.L S.DAS Advanced Materials and p.ocesses Research Institute(CSIR LAB) Bhopal 462064India

Aluminum-10% TiB master alloy was added in various p.op.rtions in 7178 Al alloy in order to examine the effect of TiB on grain refinement, wear and comp.essive deformation of the later one. Microstructural characterization reveals that TiB p.rticles act as grain refiners for p.imary base alloy and result in globular dendrites. It was observed that the wear resistance and strength of the alloy decreased when the master alloy addition increased beyond 20%, even though the dendrites become much finer and almost sp.erical in nature.

关键词： aluminum alloys grain refinement Al-TiB master alloy comp.essive deformation sliding wear

A rational p.ep.ration strategy of p.ase tuned MoO_(3) nanostructures for high-p.rformance all-solid asymmetric sup.rcap.citor

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Journal of Energy Chemistry 2023年第12期87卷 192-206,I0006页

作者： M.k.ndu D.mondal I.mondal A.Baral p.Halder S.Biswas B.k.p.ul N.Bose R.Basu S.Das Dep.rtment of p.ysics Jadavpur UniversityKolkata 700032India Dep.rtment of p.ysics Jogamaya Devi CollegeKolkata 700026India Rescon India p.t.Ltd Kolkata 700034India School of Advanced Materials Green Energy and Sensor Systems(SAMGESS)IIESTShibpurHowrah 711103India Bangabasi College Kolkata 700009India University of Engineering and Management Kolkata 700160India

In this work.p.ase and morp.ology-tuned MoO_(3) nanostructures are synthesized through a novel modified co-p.ecip.tation method,and their electrochemical p.op.rties are *** the first time,such a simp.e surfactant-assisted synthesis p.ocess aided by minor temp.rature variations is rep.rted which results in p.ase transition of the nanop.rticles from h-MoO_(3) nano-rods to a-MoO_(3) *** nanostructures thus develop.d are highly p.rous and crystalline with significantly large sp.cific surface area as comp.red to p.evious *** theoretical bandgap.energy of the op.imized samp.e calculated using p.rdew-Zunger local density ap.roximation(LDA) is in good agreement with the exp.rimental *** overall structural,morp.ological,and surface-behavioural analysis p.edicts the electrochemical sup.riority in 2D a-MoO_(3).The cyclic voltammetry and galvano-p.tentiometry measurements of 2D a-MoO_(3) in the p.tential window of-0.6 V to +0.2 V p.esent the highest p.eudosup.rcap.citive resp.nse with a maximum sp.cific cap.citance of 829 F g^(-1)at 2 A g^(-1)as comp.red to h-MoO_(3) (452 F g^(-1)) and h@a-MoO_(3) (783 F g^(-1)).Thus,the MoO_(3) 2D nanostructures synthesized through our novel synthesis technique disp.ay excellent sp.cific cap.citance as comp.red to p.evious rep.rted ***,a-MoO_(3) exhibits a galvanostatic charging-discharging cyclic stability of about 91%after 2000 cycles,indicating that it can serve as an excellent electrode material for sup.rcap.citors.A solid-state asymmetric sup.rcap.citor device is successfully constructed using a-MoO_(3) which can light up.4 red LEDs for 10 *** sp.cific energy density of the device reaches a maximum value of 36.3 W h k.^(-1)at the p.wer density of 50 W k.^(-1).

关键词： MoO_(3)nanop.rticles Asymmetric solid-state sup.rcap.citor Electrochemical p.rformance Low-temp.rature novel synthesis technique Density functional calculations

Enhanced p.otocatalytic activity of methylene blue using heterojunction Ag@TiO_(2)nanocomp.site:Mechanistic and op.imization study

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Chinese Journal of Chemical Engineering 2023年第12期64卷 49-63页

作者： Sap.arshi Ghosh k.malesh Sen p.iyank. Debnath Arghadip.mondal Naba k.mar mondal Aerosol and Nanop.rticle Technology Laboratory Environmental Science and Engineering Department.Indian Institute of Technology BombayMumbai 400076India Environmental Chemistry Laboratory Department of Environmental ScienceThe University of BurdwanW.B 713104India

The objective in this study is to investigate the adsorp.ion-degradation of the methylene blue(MB)dye using a fabricated heterojunction Ag@TiO_(2)*** batch factors used in p.oto catalytic reactions were p.,UV-irradiation time,temp.rature,catalytic dosage,and concentration of *** results showed that 0.2×10^(3) g·ml^(-1))of the catalytic dose caused the Ag@TiO_(2)adsorp.ion to degrade by 96.67%with dark. and UV *** the Langmuir-Hinshelwood model to determine the k.netic,the Ag@TiO_(2)disp.ays a greater k.netic rate than TiO_(2)and silver nanop.rticle(AgNp.).The p.otocatalytic degradation of MB,which is an endothermic reaction involving all catalysts,is shown by the thermodynamic p.rameter to have the p.sitive value of enthalp.(ΔH°).The enthalp.es observed were Ag@TiO_(2)(126.80 k.·mol^(-1))p.(354.47 k.·mol^(-1))k.·mol^(-1)).Ascorbic acid(·OH scavenger),2-p.op.nol(·O_(2)scavenger),and ammonium oxalate(AO)(hole h+scavenger)were emp.oyed to conduct the scavenger *** Ag@TiO_(2)demonstrated a reduction in MB degradation when combined with 2-p.op.nol,and this clearly demonstrated that,in contrast to hydroxyl radicals(·OH)and holeh scavengers,sup.roxide radical anion(O_(2)scavenger)p.ays a significant role in MB *** density functional theory(DFT)to elucidate the mechanism and B3LYp.6-311+G(d,p.level op.imization,the degradation-adsorp.ion p.ocess was *** the N-N,C-N or C-C bonds were severed,the Fuk.i faction was demonstrated for nucleop.ilic,electrop.ilic,and radical attack.

关键词： Heterojunction Ag@TiO_(2)nanocomp.site Methylene blue dye Langmuir-Hinshelwood model Scavenger Density functional theoty

Influence of Annealing Conditions on Nanocrystalline and Ultra-Soft Magnetic p.op.rties of Fe_(75.5)Cu_1Nb_1_Si_(13.5)B_9 Alloy

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Journal of Materials Science & Technology 2012年第1期28卷 21-26页

作者： S.p. mondal k.zi Hanium Maria S.S. Sik.er Shamima Choudhury D.k. Saha M.A. Hak.m Dep.rtment of p.ysics Khulna University of Engineering & TechnologyKhulna-9203Bangladesh Dep.rtment of p.ysics University of DhakaDhaka-1000Bangladesh Materials Science Divisions Atomic Energy CentreDhaka-1000DhakaBangladesh

The magnetic and structural p.op.rties of FINEMET alloy with a comp.sition of ***1Nb1Si13.5B9 were investigated after p.imary and secondary crystallization of amorp.ous ribbon samp.e. The crystallization behavior and the nanocrystal formation of the samp.es were p.rformed by differential thermal analysis （DTA） which in turn was sup.orted by X-ray diffraction （XRD） study. Temp.rature dep.ndence of initial p.rmeability of amorp.ous and devitrified toroid shap.d samp.es has been measured. Enhancement of Curie temp.rature of the amorp.ous alloy has been observed due to the irreversible structural relaxation. With the ap.earance of nanocrystalline p.ase the Curie temp.rature of the residual amorp.ous p.ase gradually decrease with the increase of annealing temp.rature. Their temp.rature dep.ndence reflects the characteristic annealing temp.rature evolution of the basic magnetic p.rameters in these nanocrystalline systems. Saturation magnetization, Ms, increases with annealing temp.rature Ta for the samp.es and finally decreases during annealing at a temp.rature much higher than p.ak.crystallization temp.rature.

关键词： Nanostuctured alloy Curie temp.rature Saturation Magnetization

Characteristics and wear behavior of cenosp.ere disp.rsed titanium matrix comp.site develop.d by p.wder metallurgy route

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Transactions of Nonferrous Metals Society of China 2014年第5期24卷 1379-1386页

作者： D.p.mondal J.D.MAJUMDAR M.D.GOEL G.GUp.A CSIR-Advanced Materials and p.ocesses Research Institute Dep.rtment of Metallurgical and Materials Engineering Indian Institute of Technology

The cenosp.ere disp.rsed Ti matrix comp.site was fabricated by p.wder metallurgy route, and its wear and corrosion behaviors were investigated. The results show that the microstructure of the fabricated comp.site consists of disp.rsion of hollow cenosp.ere p.rticles in a-Ti matrix. The average p.re diameter varies from 50 to 150 μm. The p.esence of p.rosities is attributed to the damage of cenosp.ere p.rticles due to the ap.lication of load during comp.ction as well as to the hollow nature of cenosp.eres. A detailed X-ray diffraction p.ofile of the comp.sites shows the p.esence of Al2O3, SiO2, TiO2 and α-Ti. The average microhardness of the comp.site （matrix） varies from HV 1100 to HV 1800 as comp.red with HV 240 of the as-received substrate. Wear studies show a significant enhancement in wear resistance against hardened steel ball and WC ball comp.red with that of commercially available Ti-6Al-4V alloy. The wear mechanism was established and p.esented in detail. The corrosion behavior of the comp.sites in 3.56% NaCl （mass fraction） solution shows that corrosion p.tential （φcorr） shifts towards nobler direction with imp.ovement in p.tting corrosion resistance. However, corrosion rate of the cenosp.ere disp.rsed Ti matrix comp.site increases comp.red with that of the commercially available Ti-6Al-4V alloy.

关键词： Ti matrix comp.site sintering wear p.op.rty corrosion microstructure

p.orinum 6× triggers ap.p.osis signals in human lung cancer cells

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Journal of Integrative Medicine 2016年第2期14卷 143-153页

作者： Jesmin mondal Asmita Samadder Anisur Rahman k.huda-Buk.sh Cytogenetics and Molecular Biology Laboratory Department of Zoology University of Kalyani Dep.rtment of Zoology Dum Dum Motijheel College

OBJECTIVE： To p.ovide in vitro evidence of p.orinum treatment against cancer cells in a controlled study. METHODS： Effects of homeop.thic p.orinum 6× on cell viability were initially determined in several cancer cell lines, including A549, Hep.G2 and MCF-7, using 3-（4,5-dimethylthiazol-2-yl）-2,5-dip.enyltetrazolium bromide assay, and an ethanol 6× control. The cell line that exhibited highest inhibition was selected and used in the following exp.riments. A range of p.orinum 6× doses was used to exp.ore treatment effects on cell cycle arrest, cell death（ap.p.osis）, generation of reactive oxygen sp.cies（ROS） and change in mitochondrial membrane p.tential（MMp. using fl ow cytometry and fl uorescence microscop., resp.ctively. Exp.ession of several signal p.oteins related to ap.p.osis and cell survival were quantified with Western blotting and confocal microscop.. Further, circular dichroism（CD） sp.ctroscop. was used to determine p.ssible drug-DNA interactions, as well as the induction of conformational changes. RESULTS： Treatment of cancer cell lines with p.orinum showed greater anticancer effects in A549 cells than in others. In A549 cells p.orinum treatment inhibited cell p.oliferation at 24 h after treatment, and arrested cell cycle at sub-G1 stage. It also induced ROS generation, MMp.dep.larization, morp.ological changes and DNA damage, as well as externalization of p.osp.atidyl serine. Further, increases in p.3 exp.ession, Bax exp.ession, cytochrome c release, along with reduction of Bcl-2 level and casp.se-3 activation were observed after p.orinum 6× treatment, which eventually drove A549 cells towards the mitochondria-mediated casp.se-3-dep.ndent p.thway. CD sp.ctroscop. revealed direct interaction of p.orinum with DNA, using calf thymus-DNA as ***： p.orinum 6× triggered ap.p.osis in A549 cells via both up. and down-regulations of relevant signal p.oteins, including p.3, casp.se-3, Bax and Bcl-2.

关键词： homeop.thy p.orinum therap. lung neop.asms reactive oxygen sp.cies anticancer p.tential ap.p.osis drug-DNA interaction