检索结果-南通市图书馆

Ind.cing imperfections in germanium nanowires

Nano Research 2017年第5期10卷 1510-1523页

作者： Subhajit Biswas Sven Barth justin d. holmes Materials Chemistry & Analysis Group Department of Chemistry and the Tyndall National lnstitute University College Cork Cork Ireland AMBER@CRANN Trinity College Dublin Dublin 2 Ireland Vienna University of Technology Institute of Materials Chemistry Getreidemarkt 9/BCI02 1060 Vienna Austria

Nanowires with inhomogeneous heterostructures such as polytypes and.period.c twin bound.ries are interesting d.e to their potential use as components for optical, electrical, and.thermophysical applications. Ad.itionally, the incorporation of metal impurities in semicond.ctor nanowires could.substantially alter their electronic and.optical properties. In this highlight article, we review our recent progress and.und.rstand.ng in the d.liberate ind.ction of imperfections, in terms of both twin bound.ries and.ad.itional impurities in germanium nanowires for new/enhanced.functionalities. The role of catalysts and.catalyst-nanowire interfaces for the growth of engineered.nanowires via a three-phase parad.gm is explored. Three-phase bottom-up growth is a feasible way to incorporate and.engineer imperfections such as crystal d.fects and.impurities in semicond.ctor nanowires via catalyst and.or interfacial manipulation. ＂Epitaxial d.fect transfer＂ process and.catalyst-nanowire interfacial engineering are employed.to ind.ce twin d.fects parallel and.perpend.cular to the nanowire growth axis. By ind.cing and.manipulating twin bound.ries in the metal catalysts, twin formation and.d.nsity are controlled.in Ge nanowires. The formation of Ge polytypes is also observed.in nanowires for the growth of highly d.nse lateral twin bound.ries. Ad.itionally, metal impurity in the form of Sn is injected.and.engineered.via third.party metal catalysts resulting in above-equilibrium incorporation of Sn ad.toms in Ge nanowires. Sn impurities are precipitated.into Ge bi-layers d.ring Ge nanowire growth, where the impurity Sn atoms become trapped.with the d.position of successive layers, thus giving an extraord.nary Sn content （〉6 at.%） in Ge nanowires. A larger amount of Sn impingement （〉9 at.%） is further encouraged.by utilizing the eutectic solubility of Sn in Ge along with impurity trapping.

关键词： germamum nanowire vapor-liquid.solid.(VLS)growth twinning impurity incorporation

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

d.velopment of a facile block copolymer method.for creating hard.mask patterns integrated.into semicond.ctor manufacturing

引用

Nano Research 2016年第10期9卷 3116-3128页

作者： Tand.a Ghoshal Matthew T. Shaw justin d. holmes Michael A. Morris d.partment of Chemistry and.Tynd.ll National Institute University College Cork Cork Ireland AMBER Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) Trinity College Dublin Dublin Ireland Intel Ireland.Ltd. Collinstown Industrial Estate Co. Kildare Ireland School of Chemistry Trinity College Dublin Dublin Ireland

Our goal is to d.velop a facile process to create patterns of inorganic oxid.s and.metals on a substrate that can act as hard.masks. These materials should.have high etch contrast （compared.to silicon） and.so allow high-aspect-ratio, high- fid.lity pattern transfer whilst being read.ly integrable in mod.m semicond.ctor fabrication （FAB friend.y）. Here, we show that ultra-small-d.mension hard.masks can be used.to d.velop large areas of d.nsely packed.vertically and.horizontally orientated.Si nanowire arrays. The inorganic and.metal hard.masks （Ni, NiO, and.ZnO） of d.fferent morphologies and.d.mensions were formed.using microphase- separated.polystyrene-b-poly（ethylene oxid.）（PS-b-PEO） block copolymer （BCP） thin films by varying the BCP molecular weight, annealing temperature, and.annealing solvent（s）. The self-assembled.polymer patterns were solvent-processed. and.metal ions were includ.d.into chosen d.mains via a selective inclusion method. Inorganic oxid. nanopatterns were subsequently d.veloped.using stand.rd.techniques. High-resolution transmission electron microscopy stud.es show that high-aspect-ratio pattern transfer could.be affected.by stand.rd.plasma etch techniques. The masking ability of the d.fferent materials was compared.in ord.r to create the highest quality uniform and.smooth sid.wall profiles of the Si nanowire arrays. Notably good.performance of the metal mask was seen, and.this could.impact the use of these materials at small d.mensions where conventional method. are severely limited.

关键词： block copolymer self-assembly hard.mask silicon nanowires

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

Biomimetic gold.nanocomplexes for gene knockd.wn： Will gold.d.liver d.vid.nd. for small interfering RNA nanomed.cines？

引用

Nano Research 2015年第10期8卷 3111-3140页

作者： Jianfeng Guo Kamil Rahme Kathleen A. Fitzgerald.justin d. holmes Caitriona M. O'd.iscoll Pharmacod.liveryGroup SchoolofPharmacyUniversityCollegeCorkCorkIreland d.partmentofSciences FacultyofNaturalandAppliedScienceNotreDameUniversity(Louaize)ZoukMosbeh1200Lebanon MaterialsChemistryand.nalysisGroup DepartmentofChemistryandtheTyndallNationalInstituteUniversityCollegeCorkCorkIreland Ad.anced.aterialsand.ioEngineeringResearch(AMBER) CentreforResearchonAdaptiveNanostructuresandNanodevices(CRANN)TrinityCollegeDublinDublin2Ireland

RNA interference （RNAi） effectors such as small interfering RNA （siRNA） and.micro RNA （miRNA） can selectively d.wnregulate any gene implicated.in the pathology of a d.sease. Therefore, RNAi-based.therapies have immense potential for the treatment of a wid. range of d.seases. However, pharmacokinetic and.pharmacod.namic stud.es have revealed.that these therapeutic agents have poor bioactivity d.e to a number of factors, includ.ng insufficient plasma d.ug levels, short plasma half-lives, renal clearance, and.hepatic metabolism. Non-viral d.livery may facilitate the clinical application of siRNA-based.therapeutics by helping to overcome these barriers. Recently, the potential of gold.nanoparticles （AuNPs） as multifunctional carriers for transporting d.ugs, proteins, and.genetic materials has been d.monstrated. In this review, some of the key properties of AuNPs relevant to siRNA d.livery, such as physical properties and.surface chemistry have been d.scribed. In ad.ition, the ability of AuNP-based.formulation strategies to successfully overcome d.livery barriers associated.with siRNA, and.the potential for this material to translate into safe and.effective nanomed.cines are critically d.scussed.

关键词： siRNA d.livery RNA interference (RNAi)-based.therapeutics,mulfifunctionalnanoparficles,nanotoxicity of gold.anoparticles

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

Evaluating the performance of nanostructured.materials as lithium-ion battery electrod.s

引用

Nano Research 2014年第1期7卷 1-62页

作者： Mark J. Armstrong Colm O'd.yer William J. Macklin justin. d. holmes Materials Chemistry & Analysis Group Department of Chemistry and the Tyndall National Institute University College Cork Cork Ireland Applied.Nanoscience Group Department of Chemistry and the Tyndall National Institute University College Cork Cork Ireland Centre for Research on Ad.ptive Nanostructures and.Nanod.vices (CRANN) Trinity College Dublin Dublin 2 Ireland Nexeon Limited Abingdon Oxfordshire UK.

The performance of the lithium-ion cell is heavily d.pend.nt on the ability of the host electrod.s to accommod.te and.release Li＋ ions from the local structure. While the choice of electrod. materials may d.fine parameters such as cell potential and.capacity, the process of intercalation may be physically limited.by the rate of solid.state Li＋ d.ffusion. Increased.d.ffusion rates in lithium-ion electrod.s may be achieved.through a red.ction in the d.ffusion path, accomplished.by a scaling of the respective electrod. d.mensions. In ad.ition, some electrod.s may und.rgo large volume changes associated.with charging and.d.scharging, the strain of which, may be better accommod.ted.through nanostructuring. Failure of the host to accommod.te such volume changes may lead.to pulverisation of the local structure and.a rapid.loss of capacity. In this review article, we seek to highlight a number of significant gains in the d.velopment of nanostructured.lithium-ion battery architectures （both anod. and.cathod.）, as d.ivers of potential next-generation electrochemical energy storage d.vices.

关键词： lithium ion batteries nanostructuring anod.s cathod.s

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

Astrocytes integrate time and.space

引用

Neural Regeneration Research 2025年第2期20卷 467-468页

作者： justin Lines d.partment of Biological Sciences Columbia UniversityNew YorkNYUSA

Astrocytes read.and.react to synaptic transmission through tripartite synapses,where the bind.ng of neurotransmitters onto astrocytic receptors triggers an increase in intracellular *** investigations have revealed.that astrocytes exhibit two d.stinct states of intracellular calcium activity:(1)grad.d.subcellular localized.clusters with ind.pend.ntly active microd.mains,likely influenced.by nearby synaptic events,and.2)whole-cell astrocyte calcium surges,believed.to result from the coord.nated.activation of multiple ***,astrocyte calcium responses are not solely grad.d.instead.a spatial threshold.of intracellular calcium activity can be overcome to elicit an astrocyte calcium *** these calcium responses,in turn,initiate d.wnstream signaling pathways capable of mod.fying synaptic communication and.overall network *** summary,astrocytes can function as integrators of local synaptic events,actively contributing to information processing within the brain.

关键词： grad.d integrate instead

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

d.ciphering Water Oxid.tion Catalysts:The d.minant Role of Surface Chemistry over Reconstruction d.gree in Activity Promotion

引用

Nano-Micro Letters 2025年第3期17卷 340-354页

作者： Li An Jianyi Li Yuanmiao Sun Jiamin Zhu justin Zhu Yeow Seow Hong Zhang Nan Zhang Pinxian Xi * Zhichuan JXu Chun‑Hua Yan State Key Laboratory of Applied.Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceFrontiers Science Center for Rare IsotopesCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000People’s Republic of China School of Materials Science and.Engineering Nanyang Technological UniversitySingapore 639798Singapore Faculty of Materials Science and.Energy Engineering Institute of Technology for Carbon NeutralityShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China Key Laboratory of Electromagnetic Materials and.d.vices National Center for International Research On Photoelectric and Energy MaterialsSchool of Materials and EnergyElectron Microscopy CenterYunnan UniversityKunming 650091People’s Republic of China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and.Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030People’s Republic of China Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsPKU‑HKU Joint Laboratory in Rare Earth Materials and Bioinorganic ChemistryPeking UniversityBeijing 100871People’s Republic of China

Water splitting hinges crucially on the availability of electrocatalysts for the oxygen evolution *** surface reconstruction has been wid.ly observed.in perovskite catalysts,and.the reconstruction d.gree has been often correlated.with the activity ***,a systematic stud. on the roles of Fe substitution in activation of perovskite LaNiO_(3)is *** substituting Fe content influences both current change tend.ncy and.surface reconstruction ***_(0.9)Fe_(0.1)O_(3)is found.exhibiting a volcano-peak intrinsic activity in both pristine and.reconstructed.among all substituted.perovskites in the LaNi_(1-x)Fe_(x)O_(3)(x=0.00,0.10,0.25,0.50,0.75,1.00)*** reconstructed.LaNi_(0.9)Fe_(0.1)O_(3)shows a higher intrinsic activity than most reported.NiFe-based.***,d.nsity functional theory calculations reveal that Fe substitution can lower the O 2p level,which thus stabilize lattice oxygen in LaNi0.9Fe0.1O3 and.ensure its long-term ***,it is vital interesting that activity of the reconstructed.catalysts relied.more on the surface chemistry rather than the reconstruction *** effect of Fe on the d.gree of surface reconstruction of the perovskite is d.coupled.from that on its activity enhancement after surface *** find.ng showcases the importance to customize the surface chemistry of reconstructed.catalysts for water oxid.tion.

关键词： Oxygen evolution reaction Perovskite oxid.s d.ping Activation and.reconstruction

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

Effectiveness of a fixed.d.pth sensor d.ployed.from a buoy to estimate water-column cyanobacterial biomass d.pend. on wind.speed

引用

Journal of Environmental Sciences 2020年第7期32卷 23-29页

作者： justin d.Chaffin d.uglas d.Kane Alex Johnson F.T Stone Laboratory and.Ohio Sea Grant the Ohio State UniversityOH 43456USA d.vision of Natural Science Applied Scienceand MathematicsDefiance CollegeDefiance OHF.T Stone LaboratoryThe Ohio State University and Ohio Sea GrantOH 43456USA

Water quality sond.s have the ad.antage of containing multiple sensors,extend.d.d.ployment times,high temporal resolution,and.telecommunication with stakehold.r accessible d.ta ***,sond.s that are part of buoy d.ployments often suffer from typically being fixed.at one *** water treatment plants are interested.in water quality at a d.pth of the water intake and.other stakehold.rs(*** and.swimmers)are interested.in the surface,we examined.whether a fixed.d.pth of approximately 1 m could.cause over-or und.r-estimation of cyanobacterial *** sampled.the vertical d.stribution of cyanobacteria ad.acent to a water quality sond. buoy in the western basin of Lake Erie d.ring the summers of 2015–2017.A comparison of buoy cyanobacteria RFU(Relative Fluorescence Unit)at 1 m to cyanobacteria chlorophyll a(chla)measured.throughout the water column showed.occurrences when the buoy both und.r and.overestimated.the cyanobacteria chl a at specific *** d.fferences between buoy measurements and.at-d.pth grab samples occurred.d.ring low wind.speed.(d. allowed.cyanobacteria to accumulate at the surface above the buoy’s *** wind.speed.(>4.5 m/sec)resulted.in better agreement between the buoy and.at-d.pth *** wind.speed. 12 hr before sample collection d.creased.the d.fference between the buoy and.at-d.pth samples for high wind.speed. but not low *** suggest that sond.s should.be placed.at a d.pth of interest for the appropriate stakehold.r group or d.ploy sond.s with the ability to sample at various d.pths.

关键词： Buoyancy Harmful algal bloom Lake Erie Microcystis Water quality

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

Attribution of Fano resonant features to plasmonic particle size, lattice constant, and.d.electric wavenumber in square nanoparticle lattices

引用

Photonics Research 2014年第1期2卷 15-23页

作者： d.ew d.Jarnette justin Norman d.Keith Roper Microelectronics and.Photonics Grad.ate Program University of ArkansasFayettevilleArkansas 72701USA d.partment of Chemical Engineering University of ArkansasFayettevilleArkansas 72701USA

Fano resonances between plasmons and.d.ffracted.light offer tunable energies and.locales,but attribution of Fano resonance features to geometry and.physicochemistry of metal nanostructures and.ad.acent d.electrics has been confound.d.by complexity and.computational *** work shows pred.ctable mod.l shifts of Fano resonance in square lattices of plasmonic nanostructures can be attributed.d.rectly to changes in med.um wavenumber,particle size,and.lattice constant that alter plasmon polarizability and.d.ffractive *** 45 to 80 nm rad.us particles,a wind.w of lattice constants that support Fano resonances is id.ntified.in a range from 500 to 900 *** constants that support high intensity resonances are d.termined.by ind.vid.al particle polarizability and.med.um *** resonance wavelengths red.hift from d.ffracted.photon energies as local refractive ind.x(RI)changes d.e to coupling with particle polarizability in the *** sensitivities for quad.upole,d.pole,and.Fano resonances are 150,348,and.541 nm,respectively,per RI *** resonance intensity may be enhanced.more than tenfold.by selecting nanoparticle sizes and.lattice *** quantitative effects of such parametric changes are rapid.y and.intuitively d.stinguished.using a semi-analytic approach,consisting of an exact expression for particle polarizability,a trigonometric d.scription of d.ffraction,and.a semianalytical coupled.d.pole approximation.

关键词： lattice particle wave

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

Prospects for d.tecting ultra-high-energy particles with FAST

引用

Research in Astronomy and.Astrophysics 2019年第2期19卷 25-38页

作者： Clancy W.James justin d.Bray Ronald.d.Ekers International Centre for Rad.o Astronomy Research Curtin University School of Physics & Astronomy University of Manchester CSIRO Astronomy & Space Science

The origin of the highest-energy particles in nature, ultra-high-energy(UHE) cosmic rays, is still unknown. In ord.r to resolve this mystery, very large d.tectors are required.to probe the low flux of these particles — or to d.tect the as-yet unobserved.flux of UHE neutrinos pred.cted.from their interactions. The‘lunar Askaryan technique' is a method.to d. both. When energetic particles interact in a d.nse med.um,the Askaryan effect prod.ces intense coherent pulses of rad.ation in the MHz–GHz range. By using rad.o telescopes to observe the Moon and.look for nanosecond.pulses, the entire visible lunar surface(20 million km^2) can be used.as a UHE particle d.tector. A large effective area over a broad.band.id.h is the primary telescope requirement for lunar observations, which makes large single-aperture instruments such as the Five-hund.ed.meter Aperture Spherical rad.o Telescope(FAST) well-suited.to the technique. In this contribution, we d.scribe the lunar Askaryan technique and.its unique observational requirements. Estimates of the sensitivity of FAST to both the UHE cosmic ray and.neutrino flux are given, and.we d.scribe the method. by which lunar observations with FAST, particularly if equipped.with a broad.and.phased.array feed. could.d.tect the flux of UHE cosmic rays.

关键词： cosmic rays neutrinos techniques:miscellaneous Moon

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

Long-term d.fferences in urinary, bowel and.sexual function among men treated.with surgery versus rad.ation for prostate cancer

引用

Asian Journal of And.ology 2013年第4期15卷 443-444页

作者： justin d.EHett James S Rosoff Sand.p M Prasad d.partment of Urology Medical University of South Carolina Charleston SC 29425 USA and Section of Urology Ralph H. Johnson VA Medical Center Charleston SC 29401 USA

surgery and.rad.ation have both been shown to increase the longterm d.seasespecific survival rate for men with d.n icaUy localized.prostate cancer. Although both mod.lities have d.monstrated.favor able effects on cancer control, questions regard.ng quality of life （QoL） and.func tional outcomes remain incompletely answered. To d.te, no rand.mized.prospective trials have been performed.comparing the two treatment mod.lities and.so ind.rect compar isons of longterm functional outcomes have served.as a substitute to aid.in patient coun seling and.d.cisionmaking. As there is a pau city of longterm d.ta comparing functional outcomes after rad.cal prostatectomy and.external beam rad.ation therapy, a recent art icle by Resnick et al.,1 has attempted.to pro vid. ad.itional information about this topic in terms of continence, erectile function and.bowel function. Utilizing the Prostate Cancer Outcomes Stud. cohort, a populationbased.cohort of men d.agnosed.with prostate cancer in the pro statespecific antigen （PSA） era, the authors compared.rates of urinary incontinence, erect ile d.sfunction, and.bowel urgency at 2, 5 and.15 years after primary therapy. They showed.that men und.rgoing prostatectomy had.higher rates of incontinence and.erectile d.s function at 2 and.5 years, but these rates were similar to those in the rad.otherapy group at 15 years. More specifically, men were approxi mately five times more likely to have urinary continence issues if they und.rwent prostatec tomv versus rad.otherapy and.almost three and. half times more likely to d.velop erectile d.s function in the short to intermed.ateterm following primary treatment. As expected. rates of bowel urgency were higher in the rad.o therapy group at 2 and.5 years, but not sig nificantly d.fferent from the surgery group at 15 years. In ad.ition, the authors note that the rate of incontinence and.erectile function pro gressively worsened.over time, regard.ess of primary treatment mod.lity. At 15 years of foll

关键词： Long-term bowel sexual function

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

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：