检索结果-南通市图书馆

Transport in graphene nanostructures

Frontiers of physics 2011年第3期6卷 271-293页

作者： Christoph Stampfer Stefan Fringes Johannes Gfittinger Francoise Molitor Christian Yolk bernat Terrds Jan Dauber Stephan Engels Stefan Schnez Arnhild Jacobsen Susanne Droscher Thomas Ihn Klaus Ensslin jara-fit and ii. institute of physics b RWTH Aachen University 52074 Aachen and Peter Griinberg Institute （PCI-9） Forschungszentrum Jiilich 52425 Jiilich Germany Solid State physics Laboratory ETH Zurich 8093 Zurich Switzerland

Graphene nanostructures are promising candidates for future nanoelectronics and solid-state quan- tum information technology. In this review we provide an overview of a number of electron transport experiments on etched graphene nanostructures. We briefly revisit the electronic properties and the transport characteristics of bulk, i.e., two-dimensional graphene. The fabrication techniques for making graphene nanostructures such as nanoribbons, single electron transistors and quantum dots, mainly based on a dry etching ＂paper-cutting＂ technique are discussed in detail. The limitations of the current fabrication technology are discussed when we outline the quantum transport properties of the nanostructured devices. In particular we focus here on transport through graphene nanoribbons and constrictions, single electron transistors as well as on graphene quantum dots including dou- ble quantum dots. These quasi-one-dimensional （nanoribbons） and quasi-zero-dimensional （quantum dots） graphene nanostructures show a clear route of how to overcome the gapless nature of graphene allowing the confinement of individual carriers and their control by lateral graphene gates and charge detectors. In particular, wo emphasize that graphene quantum dots and double quantum dots are very promising systems for spin-based solid state quantum computation, since they are believed to have exceptionally long spin coherence times due to weak spin-orbit coupling and weak hyperflne interaction in graphene.

关键词： graphene nanostructures electron transport quantum dots

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

Highly sensitive ratiometric fluorescent fiber matrices for oxygen sensing with micrometer spatial resolution

引用

bio-Design and Manufacturing 2024年第3期7卷 292-306页

作者： Giuliana Grasso Valentina Onesto Stefania Forciniti Eliana D’Amone Francesco Colella Lara Pierantoni Valeria Famà Giuseppe Gigli Rui L.Reis J.Miguel Oliveira Loretta L.del Mercato nstitute of Nanotechnology National Research Council(CNR-NANOTEC)c/o Campus Ecoteknevia Monteroni73100 LecceItaly Department of Mathematics and physics“Ennio De Giorgi” University of Salentoc/o Campus Ecoteknevia Monteroni73100 LecceItaly 3b’s Research Group I3Bs–Research Institute on BiomaterialsBiodegradables and BiomimeticsHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineUniversity of MinhoAveParkZona Industrial da Gandra4805-017 BarcoGuimarãesPortugal ICVS/3b’s-PT Government Associate Laboratory 4806-909 Braga/GuimarãesPortugal Department of Experimental Medicine University of Salentoc/o Campus Ecoteknevia Monteroni73100 LecceItaly

Oxygen(O_(2))-sensing matrices are promising tools for the live monitoring of extracellular O_(2) consumption levels in long-term cell *** this study,ratiometric O_(2)-sensing membranes were prepared by electrospinning,an easy,low-cost,scalable,and robust method for fabricating ***(ε-caprolactone)and poly(dimethyl)siloxane polymers were blended with tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(ii.dichloride,which was used as the O_(2)-sensing probe,and rhodamine b isothiocyanate,which was used as the reference *** functionalized scaffolds were morphologically characterized by scanning electron microscopy,and their physicochemical profiles were obtained by Fourier transform infrared spectroscopy,thermogravimetric analysis,and water contact angle *** sensing capabilities were investigated by confocal laser scanning microscopy,performing photobleaching,reversibility,and calibration curve studies toward different dissolved O_(2)(DO)*** sensing nanofibers showed a high response to changes in DO concentrations in the physiological-pathological range from 0.5%to 20%and good stability under ratiometric *** addition,the sensing systems were highly biocompatible for cell growth promoting adhesiveness and growth of three cancer cell lines,namely metastatic melanoma cell line SK-MEL2,breast cancer cell line MCF-7,and pancreatic ductal adenocarcinoma cell line Panc-1,thus recreating a suitable biological environment in *** O_(2)-sensing biomaterials can potentially measure alterations in cell metabolism caused by changes in ambient O_(2)content during drug testing/validation and tissue regeneration processes.

关键词： Electrospinning Ruthenium(ii.dichloride Oxygen sensors Ratiometric imaging Fluorescence

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

Amplitude analysis of the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)

引用

Chinese physics C 2024年第8期48卷 6-33页

作者： M.Ablikim M.N.Achasov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso Q.An Y.bai O.bakina I.balossino Y.ban H.-R.bao V.batozskaya K.begzsuren N.berger M.berlowski M.bertani D.bettoni F.bianchi E.bianco A.bortone I.boyko R.A.briere A.brueggemann H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin J.F.Chang W.L.Chang G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.S.Chen M.L.Chen S.J.Chen S.L.Chen S.M.Chen T.Chen X.R.Chen X.T.Chen Y.b.Chen Y.Q.Chen Z.J.Chen Z.Y.Chen S.K.Choi X.Chu G.Cibinetto F.Cossio J.J.Cui H.L.Dai J.P.Dai A.Dbeyssi R.E.de boer D.Dedovich C.Q.Deng Z.Y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori b.Fang S.S.Fang W.X.Fang Y.Fang Y.Q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng J.H.Feng Y.T.Feng K.Fischer M.Fritsch C.D.Fu J.L.Fu Y.W.Fu H.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia P.T.Ge Z.W.Ge C.Geng E.M.Gersabeck b.Ding X.X.Ding Y.Ding Y.Ding J.Dong L.Y.Dong M.Y.Dong X.Dong M.C.Du S.X.Du Z.H.Duan P.Egorov Y.H.Fan J.Fang JA.Gilman K.Goetzen L.Gong W.X.Gong W.Gradl S.Gramigna M.Greco M.H.Gu Y.T.Gu C.Y.Guan Z.L.Guan A.Q.Guo L.b.Guo M.J.Guo R.P.Guo Y.P.Guo A.Guskov J.Gutierrez K.L.Han T.T.Han X.Q.Hao F.A.Harris K.K.He K.L.He F.H.Heinsius C.H.Heinz Y.K.Heng C.Herold T.Holtmann P.C.Hong G.Y.Hou X.T.Hou Y.R.Hou Z.L.Hou b.Y.Hu H.M.Hu J.F.Hu T.Hu Y.Hu G.S.Huang K.X.Huang L.Q.Huang X.T.Huang Y.P.Huang T.Hussain F.H\"olzken N.H\"usken N.in der Wiesche M.Irshad J.Jackson S.Janchiv J.H.Jeong Q.Ji Q.P.Ji W.Ji X.b.Ji X.L.Ji Y.Y.Ji X.Q.Jia Z.K.Jia D.Jiang H.b.Jiang P.C.Jiang S.S.Jiang T.J.Jiang X.S.Jiang Y.Jiang J.b.Jiao J.K.Jiao Z.Jiao S.Jin Y.Jin M.Q.Jing X.M.Jing T.Johansson S.Kabana N.Kalantar-Nayestanaki X.L.Kang X.S.Kang M.Kavatsyuk b.C.Ke V.Khachatryan A.Khoukaz R.Kiuchi O.b.Kolcu b.Kopf M.Kuessner X.Kui A.Kupsc W.K\"uhn J.J.Lane P.Larin L.Lavezzi T.T.Lei Z.H.Lei H.Leithoff M.Lellmann T.Lenz C.Li C.Li C.H.Li Cheng Li D.M.Li F.Li G.Li H.Li H.b.Li H.J.Li H.N.Li Hui Li J.R.Li J.S.Li K.Li L.J.Li L.K.Li Lei Li M.H.Li P.R.Li Q.M.Li Q.X.Li R.Li S.X.Li T.Li W.D.Li W.G.Li X.Li X.H.Li X.L.Li X.Y.Li Y institute of High Energy physics Chinese Academy of SciencesBeijing 100049China beihang University Beijing 100191China bochum Ruhr-University D-44780 BochumGermany budker institute of Nuclear physics Sb RAS(bINP) Novosibirsk 630090Russia Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central South University Changsha 410083China China Center of Advanced Science and Technology Beijing 100190China China University of Geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China Henan University of Science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian institute of Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN Laboratori Nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN Laboratori Nazionali di Frascati University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN Sezione di Ferrara University of FerraraI-44122FerraraItaly Inner Mongolia University Hohhot 010021China institute of Modern physics Lanzhou 730000China institute of physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de A

Using e^(+)e^(−)annihilation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at the center-of-mass energy√s=3.773 GeV with the bESii. detector,a joint amplitude analysis is performed on the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).The fit fractions of individual components are obtained,and large interferences among the dominant components of the decays D^(0)→a_(1)(1260)π,D^(0)→π(1300)π,D^(0)→ρ(770)ρ(770),and D^(0)→2(ππ)_(S)are observed in both *** the obtained amplitude model,the CP-even fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determined to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,*** branching fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are measured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,*** amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of D^(0)→4πwhen used to determine the CKM angleγ(ϕ_(3))via the b^(−)→DK^(−)decay.

关键词： bESii. D^(0)meson decays amplitude analysis CP-even fraction

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

Comparison between χ~2 and bayesian Statistics with Considering the Redshift Dependence of Stretch and Color from JLA Data

引用

Communications in Theoretical physics 2019年第9期71卷 1097-1108页

作者： Ze Zhao School of Physical Sciences University of Chinese Academy of Sciences CAS Key Laboratory of Theoretical physics Institute of Theoretical PhysicsChinese Academy of Sciences Kavli institute for Theoretical physics China Chinese Academy of Sciences

In this work, we compare the impacts given by χ^2 statistics and bayesian statistics. bayesian statistics is a new statistical method proposed by [C. Ma, P. S. Corasaniti, and b. A. bassett, arXiv:1603.08519[***](2016)]recently, which gives a fully account for the standard-candle parameter dependence of the data covariance matrix. For this two statistical methods, we explore the possible redshift-dependence of stretch-luminosity parameter α and colorluminosity parameter β by using redshift tomography. by constraining the ΛCDM model, we check the consistency of cosmology-fit results given by the SN sample of each redshift bin. We also adopt the linear parametrization to explore the possible evolution of α and β and the deceleration parameter q(z) for CPL, JbP, bA and Wang models. We find that:(i) Using the full JLA data, at high redshift α has a trend of decreasing at more than 1.5σ confidence level(CL),and β has a significant trend of decreasing at more than 19σ CL.(ii. Compared with χ^2 statistics(constant α, β) and bayesian statistics(constant α, β), bayesian statistics(linear α and β) yields a larger best-fit value of fractional matter density ?m0 from JLA+CMb+GC data, which is much closer to slightly deviates from the best-fit result given by other cosmological observations.(ii.) The figure of merit(FoM) given by JLA+CMb+GC data from bayesian statistics is also larger than the FoM from χ^2 statistics, which indicates that former statistics has a better accuracy.(iv) q(z) given by both statistical methods favor an eternal cosmic acceleration at 1σ CL.

关键词： cosmology dark energy observations cosmological parameters supernova

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

Ab initio calculations on accurate dissociation energy, equilibrium geometry, and analytic potential energy function for the 6~3Π state of ~7LiH molecule

引用

Chinese Optics Letters 2005年第12期3卷 683-685页

作者：施德恒刘玉芳孙金锋朱遵略杨向东 College of physics & Electronic Engineering Xinyang Normal UniversityXinyang 464000 College of Physics & Information EngineeringHenan Normal UniversityXinxiang 453007 Institute of Atomic and Molecular PhysicsSichuan UniversityChengdu 610065 College of physics & Information Engineering Henan Normal UniversityXinxiang 453007 College of physics & Information Engineering Henan Normal UniversityXinxiang 453007 Institute of Atomic and Molecular PhysicsSichuan UniversityChengdu 610065 institute of Atomic and Molecular physics Sichuan UniversityChengdu 610065

The accurate dissociation energy and equilibrium geometry of the ball state of ^7LiH molecule is calculated using a symmetry-adapted-cluster configuration-interaction method in full active space. And the calculated results are 0.2580 eV and 0.1958 nm for the dissociation energy and equilibrium geometry, respectively. The whole potential energy curve for the b^3∏ state is also calculated over the internuclear separation range from about 0.10 to 0.54 nm. The results are fitted by the Murrell-Sorbie function. It is found that the Murrell-Sorbie function form, which is mainly used to fit the ground-state potential energy function, is well suitable for the excited triplet b^3∏ state. The vertical excitation energy from the ground state to the b^3∏ state is calculated to be 4.233 eV. based on the analytic potential energy function, the harmonic frequency of 610.88 cm^-1 about this state is firstly estimated. Compared with other theoretical results, this work is the most complete effort to deal with the analytic potential energy function and the harmonic frequency of this state.

关键词： PEF Ab initio calculations on accurate dissociation energy and analytic potential energy function for the 6~3 equilibrium geometry molecule state of

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

Investigation on effects of new physics in c→(s,d)l+νltransitions

引用

Chinese physics C 2021年第6期45卷 74-90页

作者： Xue Leng Xiao-Long Mu Zhi-Tian Zou Ying Li Department of physics Yantai UniversityYantai 264005China institute of Particle physics and Key Laboratory of Quark and Lepton physics(MOE) Central China Normal UniversityWuhan 430079China Center for High Energy physics Peking UniversityBeijing 100871China

Anomalies in decays induced by b→ct Ve(l=e,μ,T)transitions may imply lepton flavor universality violations,which raises questions on such phenomena in the D decays induced by c→(s,d)t+ve *** measurements of the pure leptonic and semi-leptonic D decays agree with the standard model(SM)predictions,and such agreements can be used to constrain the new physics(NP)*** this work,we extend SM by as-suming general efective Hamiltonians describing the c→(s,d)t+Ve transitions including the full set of the four-fermion *** the latest experimental data,we perform a least χ^(2) fit of the Wilson cofficient corresponding to each *** results indicate that the Wilson coefficients of tensor and scalar operators in the muon sector are in the order of 0(10^(-2))while others are in the order of 0(10^(-3)).The lepton flavor universality could be violated by interactions with the scalar *** also determine that the pure leptonic decays are significantly sensitive to scalar *** efects of NP on the semi-leptonic decays with electron final state are negligible;however,for the decays with the muon final state,the effects of scalar and tensor operators will appear in the forward-back-ward asymmetries and the muon helicity asymmetries of D→Pμ^(+)Vpμ*** future measurements of these de-cays in the bESii. and belle ii.experiments will facilitate the evaluation of NP effects.

关键词： D decays new physics semi-leptonic decays

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

Scanning tunneling spectroscopy of two-dimensional electron systems:Quantum Hall transitions,Landau level spectroscopy and Rashba spin splitting

Scanning tunneling spectroscopy of two-dimensional electron ...

引用

第18届国际真空大会

作者： S. becker K. Hashimoto C. Sohrmann R. Rmer J. Wiebe R. Wiesendanger M. Liebmann T. Mashoff M. Pratzer M. Liebmann M. Morgenstern institute of physics and jara-fit RWTH AachenOtto-Blumenthal-StraβeD-52074 AachenGermany Dept. of physics Tohoku UniversitySendai 980-8578Japan Dept. of physics and Center for Scientific Computing Univ. of WarwickGibbet Hill RoadCoventry CV4 7ALUnited Kingdom Inst. of Appl. physics Hamburg UniversityJungiusstr. 1120355 HamburgGermany

Using scanning tunneling spectroscopy （STS） down to 0.3 K in b-fields up to 12 T, we investigate the local density of states of a two-dimensional electron system （2DES） created by Cs adsorption on n-type and p-type InSb（110）. Cs induces a large band bending close to the surface creating a 2DES in the accumulation/inversion layer, which exhibits a 2D Fermi level in the inversion layer. The local density of states of the 2DES at b=0 T shows standing waves with wave numbers in accordance with theory. In a perpendicular magnetic field the percolating drift states of the quantum hall transition are observed within the disorder broadened Landau levels [1] （Fig. 1）. Using a highly p-doped sample we achieve a steep band bending potential showing Landau levels with a beating pattern attributed to Rashba spin splitting. A large Rashba parameter of α= 7·10-11 eV m can be estimated. Local dI/dV（V,b）-spectra at a less steep band bending exhibit an increased tip-induced band bending due the localization of states within the quantum-Hall regime, a Coulomb gap at the Fermi level and indications of an exchange enhanced spin splitting.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Preface to the Special Issue on the Celebration of the 60th Anniversary of Dedicating to Scientific Research of *** Wang

引用

Journal of Semiconductors 2020年第1期41卷 9-9页

作者： Zhijie Wang Chao Zhao Fei Ding institute of Semiconductors Chinese Academy of SciencesBeijing100083China jara-Fundamentals of Future Information Technology(jara-fit)and RWTH Aachen University 52074AachenGermany Peter Grünberg institute(PGI-9) Forschungszentrum Jülich52425JülichGermany institute for Solid State physics Leibniz University of HannoverAppelstraße 230167HannoverGermany

*** Wang,a world-famous semiconductor materials physicist,was born on December 29,1938,in Zhenping County,Henan Province,*** graduating from the Department of physics,Nankai University in 1962,he joined the institute of Semiconductors,Chinese Academy of Sciences,until *** has made outstanding achievements in the field of semiconductor materials and material *** has engaged in the study of the irradiation effect of silicon solar cells used in artificial satellites and the devices/modules in nuclear transient irradiation in his early career,which significantly contributed to the realization of atomic/hydrogen bombs and artificial satellites in *** joined the Department of Solid State physics,the University of Lund,from 1980 to 1983,where he worked on deep energy level physics and photoluminescence studies of *** and collaborators developed a new method to identify whether the two-deep levels within a bandgap are coupled,thus solving the longexisting argument for the nature of gold-related donors and acceptors in silicon and A and b deep levels in liquid phase epitaxy grown GaAs.

关键词： realization artificial transient

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

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

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：