检索结果-南通市图书馆

Bimetallic Single‑Atom Catalysts for Water Splitting

Nano-Micro Letters 2025年第1期17卷 1-45页

作者： megha a.deshmukh Aristides Bakandritsos Radek Zbořil Nanotechnology Centre Centre for Energy and Environmental TechnologiesVŠB–Technical University of Ostrava17.listopadu 2172/1570800 Ostrava‑PorubaCzech Republic Regional Centre of Advanced Technologies and Materials Czech Advanced Technology and Research Institute(CATRIN)Palacky University OlomoucŠlechtitelů241/2778371 Olomouc–HoliceCzech Republic

Green hydrogen from water splitting has emerged as a critical energy vector with the potential to spearhead the global transition to a fossil fuel-independent *** field of catalysis has been revolutionized by single-atom catalysts(SACs),which exhibit unique and intricate interactions between atomically dispersed metal atoms and their ***,bimetallic SACs(bimSACs)have garnered significant attention for leveraging the synergistic functions of two metal ions coordinated on appropriately designed *** offer an avenue for rich metal–metal and metal–support cooperativity,potentially addressing current limitations of SACs in effectively furnishing transformations which involve synchronous proton–electron exchanges,substrate activation with reversible redox cycles,simultaneous multi-electron transfer,regulation of spin states,tuning of electronic properties,and cyclic transition states with low activation *** review aims to encapsulate the growing advancements in bimSACs,with an emphasis on their pivotal role in hydrogen generation via water *** subsequently delve into advanced experimental methodologies for the elaborate characterization of SACs,elucidate their electronic properties,and discuss their local coordination ***,we present comprehensive discussion on the deployment of bimSACs in both hydrogen evolution reaction and oxygen evolution reaction,the two half-reactions of the water electrolysis process.

关键词： Single-atom catalysts Single-atom dimers Hydrogen evolution Oxygen evolution Water splitting

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Coarse-grained molecular dynamics integrated with convolutional neural network for comparing shapes of temperature sensitive bottlebrushes

引用

npj Computational Materials 2022年第1期8卷 403-414页

作者： Soumil Y.Joshi Samrendra Singh Sanket a.deshmukh Department of Chemical Engineering Virginia TechBlacksburgVA24061USA

Quantification of shape changes in nature-inspired soft material architectures of stimuli-sensitive polymers is critical for controlling their properties but is challenging due to their softness and ***,we have computationally designed uniquely shaped bottlebrushes of a thermosensitive polymer,poly(N-isopropylacrylamide)(PNIPAM),by controlling the length of side chains along the ***-grained molecular dynamics simulations of solvated bottlebrushes were performed below and above the lower critical solution temperature of *** analyses(free volume,asphericity,etc.)show that lengths of side chains and their immediate environments dictate the compactness and bending in these *** further developed 100 unique convolutional neural network models that captured molecular-level features and generated a statistically significant quantification of the similarity between different ***,our study provides insights into the shapes of complex architectures as well as a general method to analyze *** shapes presented here may inspire the synthesis of new bottlebrushes.

关键词： convolution chains dynamics

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Sized Copper Selenide Thin Film Pre-Cursor by A Liquid Phase Chemical Growth Process

引用

稀有金属材料与工程 2012年第S1期41卷 24-27页

作者： deshmukh L P deshmukh S K Thin Film and Solar Studies Research Laboratory Department of PhysicsSolapur UniversitySolapur-413 255M.S.India

The deposition of copper selenide(CuSe)thin films was carried out using liquid phase chemical bath deposition process at the optimized growth parameters as:60℃deposition temperature,90 minutes deposition time,pH equal to 10.5±0.1 and 72±2 r/min speed of mechanical *** as-grown deposits exhibited excellent uniformity and physical adherency with the substrate surface and are smooth and diffusely reflecting with colour changing from yellowish orange to dark chocolate during *** layer is of the order of 300 nm *** EDS analysis technique gave film composition to be nearly stoichiometric(Cu=47.89%,Se=52.11%).An X-ray diffraction analysis showed CuSe to be polycrystalline hexagonal with a good match of d-values and intensities of *** crystallite size is in the nanorange(50-60 nm).The as-deposited CuSe exhibited a high coefficient of absorption(α=105cm-1)with a direct optical band gap of 1.81 *** to other chalcogenides,CuSe films exhibit low resistance;room temperature electrical resistivity being 1.55×103?*** electrical conductivity decreased with increase in temperature up to 473 K;showing totally unusual behaviour from that of the semiconducting *** thermo probe measurements showed n-type conduction of the samples.

关键词： LPCBD solar absorber Cu-deficient hexagonal metal like behaviour direct transition

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

On the road to new treatments for multiple sclerosis: targeting dendritic cell migration into the central nervous system

引用

Neural Regeneration Research 2019年第12期14卷 2088-2090页

作者： megha Meena Nathalie Cools Laboratory of Experimental Hematology Vaccine & Infectious Disease Institute (VAXINFECTIO) Faculty of Medicine and Health Sciences University of Antwerp

Distinct migratory pathways and trafficking of dendritic cells to the central nervous system (CNS): The immune system is a host defense mechanism protecting against invaders, such as bacteria and viruses, while maintaining tolerance to self. Nonetheless, a few sites throughout the body are believed to be immunologically inert, such as the testes, the eye and the brain. Indeed, experiments in the mid-20th century gave rise to the concept of the brain as a site of immune privilege. Originally, the immune privilege of the brain was thought to be absolute, attributed by a physical blood-brain barrier (BBB) protecting the CNS from the entry of pathogens and circulating immune cells. These views have changed and currently, the CNS is seen as an immune-specialized site regulated by immunological components into and within the CNS.

关键词： new treatments multiple sclerosis nervous system

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Frequency-dependent dielectric constant prediction of polymers using machine learning

引用

npj Computational Materials 2020年第1期6卷 1147-1155页

作者： Lihua Chen Chiho Kim Rohit Batra Jordan P.Lightstone Chao Wu Zongze Li Ajinkya a.deshmukh Yifei Wang Huan D.Tran Priya Vashishta Gregory A.Sotzing Yang Cao Rampi Ramprasad School of Materials Science and Engineering Georgia Institute of Technology771 Ferst Drive NWAtlantaGA 30332USA Electrical and Computer Engineering University of Connecticut371 Fairfield WayStorrsCT 06269USA Polymer Program Institute of Material ScienceUniversity of Connecticut97 North Eagleville RoadStorrsCT 06269USA Collaboratory for Advanced Computing and Simulations University of Southern CaliforniaLos AngelesCA 90089-0242USA

The dielectric constant(ϵ)is a critical parameter utilized in the design of polymeric dielectrics for energy storage capacitors,microelectronic devices,and high-voltage ***,agile discovery of polymer dielectrics with desirableϵremains a challenge,especially for high-energy,high-temperature *** aid accelerated polymer dielectrics discovery,we have developed a machine-learning(ML)-based model to instantly and accurately predict the frequency-dependentϵof polymers with the frequency range spanning 15 orders of *** model is trained using a dataset of 1210 experimentally measuredϵvalues at different frequencies,an advanced polymer fingerprinting scheme and the Gaussian process regression algorithm.

关键词： dielectric constant polymer

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Machine learning techniques for prediction of capacitance and remaining useful life of supercapacitors: A comprehensive review

引用

Journal of Energy Chemistry 2023年第2期77卷 438-451,I0011页

作者： Vaishali Sawant Rashmi deshmukh Chetan Awati Department of Technology Shivaji UniversityKolhapurMaharashtraIndia

Supercapacitors are appealing energy storage devices for their promising features like high power density,outstanding cycling stability,and a quick charge–discharge *** exceptional life cycle and ultimate power capability of supercapacitors are needed in the transportation and renewable energy generation ***,predicting the capacitance and lifecycle of supercapacitors is significant for selecting the suitable material and planning replacement intervals for *** addition,system failures can be better addressed by accurately forecasting the lifecycle of ***,the use of machine learning for performance prediction of energy storage materials has drawn increasing attention from researchers globally because of its superiority in prediction accuracy,time efficiency,and *** article presents a detailed review of the progress and advancement of ML techniques for the prediction of capacitance and remaining useful life(RUL)of *** review starts with an introduction to supercapacitor materials and ML applications in energy storage devices,followed by workflow for ML model building for supercapacitor ***,the summary of machine learning applications for the prediction of capacitance and RUL of different supercapacitor materials including EDLCs(carbon based materials),pesudocapacitive(oxides and composites)and hybrid materials is ***,the general perspective for future directions is also presented.

关键词： Supercapacitors Energy storage materials Artificial neural network Machine learning Capacitance prediction Remaining useful life

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Systematic study on heavy-particle radioactivity of superheavy nuclei ^(297–300)119

引用

Nuclear Science and Techniques 2024年第11期35卷 108-123页

作者： megha Chandran V.K.Anjali K.P.Santhosh Department of Physics University of CalicutThenhipalamKerala 673635India School of Pure and Applied Physics Kannur UniversitySwami Anandatheertha CampusPayyanurKerala 670327India

In the current study,we examined every possible cluster-daughter combination in the heavy-particle decay of isotopes ^(297-300)119 and computed the decay half-lives using the modified generalized liquid drop model(MGLDM)with the preformation factor depending on the disintegration *** predicted half-life of every heavy cluster(Z_(C)≥32)was within the experimentally observable *** results aligned with the predictions of Poenaru et al.[***.107,062503(2011)]that superheavy nuclei(SHN)with Z>110 will release heavy particles with a penetrability comparable to or greater than theα-*** half-lives predicted using the MGLDM for clusters^(89)Rb,^(91)Rb,and^(92)Rb from parents^(297)119,^(299)119,and^(300)119,respectively,agreed with the predictions of Poenaru et al.[***.J.A 54,14(2018)].It was found that the isotopes of heavy clusters Kr,Rb,Sr,Pa,In,and Cd had half-lives comparable to theαhalf-life;and isotopes of clusters I,Xe,and Cs had the minimum half-life(10^(-14)s).These observations revealed the role of the shell closure(Z=82,N=82,and N=126)of the cluster and daughter nuclei in heavy-cluster *** predicted that isotope ^(297,299)119 decayed by 4αdecay chains and isotope^(300)119 decayed by 6αdecay chains,while^(298)119 decayed by continuousαdecay *** predicted half-lives and modes of decay of the nuclei in the decay chains of^(297-300)119 agreed with the experimental data,proving the reliability of our *** present study determined the most favorable heavy-cluster emissions from these nuclei and provided suitable projectile-target combinations for their synthesis.

关键词： Cluster radioactivity Alpha radioactivity Superheavy nuclei

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Potential cotton aphid, Aphis gossypii, population suppression by arthropod predators in upland cotton

引用

Insect Science 2013年第6期20卷 778-788页

作者： Ram B. Shrestha megha N. Parajulee Texas A&M University AgriLife Research and Extension Center 1102 E. FM 1294 Lubbock TX 79403 United States

The cotton aphid, Aphis gossypii Glover, predation rate of convergent lady beetle, Hippodamia convergens Guerin-Meneville, was determined by assigning a single predator randomly to each of four prey density treatments in the laboratory. Prey densities included 25, 50, 100, and 200 aphids per Petri dish arena. Predation response was recorded at 1, 4, 8, 16, 24, and 48 h after assigning predators to their prey treatments. Rate of consumption increased through time, with all 25 aphids consumed during the first 4 h of the experiment. At the highest density, adult lady beetle consumed on average 49, 99, 131, 163, 183, and 200 aphids within 1, 4, 8, 16, 24 and 48 h, respectively. Predators showed a curvilinear feeding response in relation to total available time, indicating that convergent lady beetles have the potential to suppress larger populations of aphids through continuous feeding by regulating their predation efficiency during feeding. The analysis of age-specific mortality in absence of prey revealed that lady beetles could survive for an extended period of time （more than 2 weeks） without prey. The ability of a predator to survive without prey delays or prevents the rebound of pest populations that is a significant factor in natural biological control. A two-year field sampling of 10 cotton arthropod predator species showed that spiders （27%） were the most dominant foliage dwelling predators in the Texas High Plains cotton followed by convergent lady beetles （23.5%）, hooded beetles （13.5%）, minute pirate bugs （11%）, green lacewings （9.5%）, bigeyed bugs （7.5%）, scymnus beetles （3%）, soft-winged flower beetles （2%）, damsel bugs （1.5%）, and assassin bugs （1.5%）. A field cage study showed that one H. convergens adult per plant released at prey density of one aphid per leaf kept the aphid population below economic threshold for the entire growing season.

关键词： Aphis gossypii biological control cotton IPM functional response Hippo-damia convergens natural suppression

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

On The Role of Preparative Parameters in Growing Nanocrystalline PbS Thin Films by Liquid Phase Chemical Bath Deposition

引用

稀有金属材料与工程 2012年第S1期41卷 28-32页

作者： Chattarki A N deshmukh L P Thin Film&Solar Studies Research Laboratory Department of Physics&ElectronicsSolapur UniversitySolapur-413255M.SIndia

A liquid phase chemical bath deposition(LPCBD)method for deposition of PbS thin films is *** growth kinetics and reaction mechanism have been *** the deposition,triethanolamine complex of lead acetate was allowed to react with aqueous thiourea *** micro-slides were used as the *** deposition of PbS films was carried out under different growth parameters such as temperature,time,and reaction *** growth rate,under different conditions,was measured in terms of a terminal layer thickness and the possible reaction kinetics and mechanism is *** optimum values of the parameters to produce good quality films are 60 min,80℃and 10.5±*** EDS analysis showed that the film stoichiometry is dependent on the reaction pH and the films tend to be almost stoichiometric in high alkaline environment(>10.5).The PbS deposits appeared smooth,tightly adherent,uniform and reflecting with blackish-grey *** XRD studies showed crystalline cubic type of structure with preferred orientation along(200)*** calculated d-values,intensities of reflections and lattice parameter have excellent match with that of the JCPD *** crystallite size is found to be few tens of *** surface morphology revealed by SEM showed that the crystallites are randomly oriented and are of different shapes and *** of the crystallites appeared smaller and spherical in shape whereas,growth of some elongated irregular crystallites;bit larger in size and differing in shapes,have also been favoured.

关键词： LPCBD preparative parameters XRD SEM nanocrystals surface morphology

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of alkaline metal ions on the photoluminescence properties of Eu^(3+)-doped Ca_3Al_2O_6 phosphors

引用

Journal of Rare Earths 2016年第12期34卷 1193-1198页

作者： Kyeongsoon Park Joon Woo Pi deshmukh Abdul Hakeem Faculty of Nanotechnology and Advanced Materials Engineering Sejong University

Ca3–xAl2O6：x Eu^3＋（0.02≤x≤0.10） and Ca（2.92）Al2O6：0.04Eu^3＋,0.04M^＋（M^＋=Li^＋, Na^＋, and K^＋） phosphors were prepared by sol-gel method and their photoluminescence properties were investigated. The crystal structure of the annealed Ca3–xAl2O6：x Eu^3＋ and Ca（2.92）Al2O6：0.04Eu^3＋,0.04M^＋ phosphors was analyzed with X-ray diffraction（XRD）. The size and morphological characteristics of the annealed phosphors were investigated with a field emission scanning electron microscope（FE-SEM）. The photoluminescence properties were evaluated with a spectrofluorometer. The phosphors were effectively excited by the light of 396 nm and showed intense red emission at 616 nm, which originated from the 5D0→7F2 transition of Eu^3＋. Among the prepared phosphors, the Ca（2.96）Al2O6：0.04Eu^3＋ phosphor showed the strongest emission intensity and the highest color purity. The addition of alkaline metal ions（Li^＋, Na^＋, and K^＋） to Ca（2.96）Al2O6：0.04Eu^3＋ phosphor degraded the emission intensity and color purity.

关键词： phosphor photoluminescence emission sol-gel method Eu3+ rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：