检索结果-南通市图书馆

Current-Voltage Characteristics of Molecular Devices at Low Bias

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

Chinese Physics Letters 2004年第7期21卷 1247-1250页

作者： LIAOyun-Xing CHENHao R.Note H.Mizuseki y.kawazoe NationalKeyLaboratoryofSurfacePhysics FudanUniversityShanghai200433 physicsDepartment FudanUniversityShanghai200433 InstituteforMaterialsResearch TohokuUniversitySendai980-8577Japan

We use density functional theory and the Green function formalism with charge energy effect included in the self-consistent calculation of the I-V characteristics of a single benzene ring with an appendage of cf3, and identify some interesting properties of the I-V characteristics at low bias. The molecule picks up a fractional charge at zero bias, then the additional fractional charge produces a barrier on the junction of the molecule and contacts to perturb current flow on the molecule. This phenomenon may be useful for the design of future molecular devices.

关键词： Electronics and devices

Coulomb expansion of a van der Waals C_(60) solid film

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

Science China Mathematics 2000年第11期43卷 1224-1232页

作者：薛其坤厉建龙孙牧陆华 T.Hashizume y.Hasegawa K.Ohno y.kawazoe T.Sakurai H.Kamiyama H.Shinohara State Key Laboratory for Surface Physics Institute of Physics & Condensed Matter Physics Center Chinese Academy of Sciences Beijing 100080 China Institute for Materials Research Tohoku University Sendai 980-8577 Japan Aomori Public College Aomori 030-01 Japan Chemistry Department Nagoya University Nagoya 464-01 Japan

Scanning tunneling microscopy study revealed a van der Waals C60, solid film with 13% room-temperature lattice expansion on the GaAs(001) 2×4 surface. The mechanism involves fundamental Coulomb interaction due to charge transfer from the GaAs substrate. Theoretical calculation determines the charge transfer to be 1.76 electrons per C60 molecule. Oriented at its (110) crystallo-graphic axis this film also distinguishes itself from those formed on all other semiconductor and metal substrates where only the low-energy (111) hexagonal packing of C60 molecules was developed. It is shown that this is due to the one-dimensional confinement effect of the anisotropic substrate, which may have the prospect of controlling crystal growth.

关键词： scanning tunneling microscopy C_(60) Coulomb interaction molecular beam epitaxy charge transfer.

在线全文

学校读者我要写书评

暂无评论

磁光效应和材料磁光性质的第一性原理计算

磁光效应和材料磁光性质的第一性原理计算

量子电荷和自旋输运研讨会

作者：董锦明翁红明 y.kawazoe T.Fukumura M.Kawasaki 南京大学物理系和固体微结构物理实验室计算凝聚态物理组南京大学物理系和固体微结构物理实验室计算凝聚态物理组 IMR Tohoku University Sendai Japan IMR Tohoku University Sendai Japan IMR Tohoku University Sendai Japan

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

分子电子学和第一性原理计算(英文)

分子电子学和第一性原理计算(英文)

固态vander WaalsC _(60)膜晶格的Coulomb膨胀

量子电荷和自旋输运研讨会

作者：陈灏蒋锋周永西梁云烨 R.Note H.Mizuseki y.kawazoe 复旦大学物理系复旦大学物理系复旦大学物理系复旦大学物理系复旦大学物理系复旦大学物理系复旦大学物理系

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

中国科学（A辑） 2000年第6期30卷 529-536页

作者：薛其坤厉建龙孙牧陆华 T.Hashizume y.Ling y.Hasegawa K.Ohno Z.Q.Li y.kawazoe T.Sakurai H.Kamiyama H.Shinohara 中国科学院表面物理国家重点实验室 Institute for Materials Research Aomori Public College Chemistry Department

利用扫描隧道显微镜观测到生长在GaAs(0 0 1 ) 2× 4表面上的固态vanderWaalsC6 0 膜在室温下较之C6 0 晶体具有 1 3%的晶格膨胀 .这种膨胀是由从GaAs衬底饱和的As悬挂键上转移到C6 0 分子上的电荷之间的Coulomb作用引起的 .理论计算表... 详细信息

利用扫描隧道显微镜观测到生长在GaAs(0 0 1 ) 2× 4表面上的固态vanderWaalsC6 0 膜在室温下较之C6 0 晶体具有 1 3%的晶格膨胀 .这种膨胀是由从GaAs衬底饱和的As悬挂键上转移到C6 0 分子上的电荷之间的Coulomb作用引起的 .理论计算表明 ,平均约有 1 76个电子转移到每个C6 0 分子上 .有趣的是 ,该固态C6 0 膜为 (1 1 0 )取向 ,这明显不同于生长于其他半导体或金属表面上的具有 (1 1 1 )取向的六角密排C6 0 膜 .这种反常取向的薄膜是由GaAs衬底的各向异性产生的一维限制作用导致的 .通过选择不同的衬底 ,可以控制C6 0

关键词：晶体生长分子束外延碳60膜晶格 Coulomb膨胀

On Hardy's Theorem on SU(1,1)

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2007年第4期28卷 429-440页

作者： Takeshi kawazoe Jianming LIU Denartment of Mathematics Keio University at Fujisawa Endo FujisawaKanagawa 252-8520Japan Laboratory of Mathematics and Applied Mathematics School of Mathematical Sciences Peking UniversityBeiJing 100871China

The classical Hardy theorem asserts that f and its Fourier transform f can not both be very rapidly decreasing. This theorem was generalized on Lie groups and also for the Fourier-Jacobi transform. However, on SU（1, 1） there are infinitely many “good” functions in the sense that f and its spherical Fourier transform y both have good decay. In this paper, we shall characterize such functions on SU（1, 1）.

关键词： Heat kernel Jacobi transform Plancherel formula

HEAT KERNEL AND HARDy'S THEOREM FOR JACOBI TRANSFORM

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2003年第3期24卷 359-366页

作者： T.kawazoe LIUJIANMING DepartmentofMathematics KeioUniversityatFujisawa5322EndoFujisawaKanagawa252-8520Japan. SchoolofMathematicalSciences PekingUniversityBeijing100871China.

In this paper, the authors obtain sharp upper and lower bounds for the heat kernel associatedwith Jacobi transform, and get some analogues of Hardy's Theorem for Jacobi transform byusing the sharp estimate of the heat... 详细信息

关键词： Heat kernel Jacobi transform Uncertainty principle

Ligand density-dependent influence of arginine-glycine- aspartate functionalized gold nanoparticles on osteogenic and adipogenic differentiation of mesenchymal stem cells

在线全文

学校读者我要写书评

暂无评论

Nano Research 2018年第3期11卷 1247-1261页

作者： Jingchao Li ying Chen Naoki kawazoe Guoping Chen Intemational Center for Materials Nanoarchitectonics National lnstitute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044Japan Department of Materials Science and Engineering Graduate School of Pure and Applied Sciences University of Tsukuba 1-1-1 Tennodai Tsukuba Ibaraki 305-8577 Japan Research Center for Functional Materials National Institute for Materials Science 1- 1 Namiki Tsukuba Ibaraki 305-0044 Japan

Extracellular matrix （ECM） plays a very important role in regulating cell function and fate. It is highly desirable to fabricate biomimetic models to investigate the role of ECM in stem cell differentiation. In this study, arginine- glycine--aspartate （RGD）-modified gold nanoparticles （Au NPs） with tunable surface ligand density were prepared to mimic the ECM microenvironment. Their effect on osteogenic and adipogenic differentiation of human mesenchymal stem cells （MSCs） was investigated. The biomimetic Au NPs were taken up by MSCs in a ligand density-dependent manner. The biomimetic NPs with a high RGD density had an inhibitive effect on the alkaline phosphatase （ALP） activity, calcium deposition, and osteogenic marker gene expression of MSCs. Their effect on oil droplet formation and adipogenic marker gene expression was negative when RGD density was low, while their effect was promotive when RGD density was high. The biomimetic Au NPs regulated the osteogenic and adipogenic differentiation of MSCs mainly through affecting the focal adhesion and cytoskeleton. This study highlights the roles of biomimetic NPs on stem cell differentiation that could provide a meaningful strategy in fabricating functional biomaterials for tissue engineering and biomedical applications.

关键词： arginine-glycine--aspartate(RGD) density biomimetic goldnanopartides (Au NPs) osteogenic differentiation adipogenic differentiation mesenchymal stem cells

H^1-ESTIMATES OF LITTLEWOOD-PALEy AND LUSIN FUNCTIONS FOR JACOBI ANALySIS

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

Analysis in Theory and Applications 2009年第3期25卷 201-229页

作者： Takeshi kawazoe Department of Mathematics Keio University at Fujisawa 5322 Endo FujisawaKanagawa 252-8520 Japan

For a ≥β≥ -1/2 let △（x） = （2shx）^2α＋1 （2chx）2β＋1 denote the weight function on R＋ and L^1 （△） the space of integrable functions on R＋ with respect to △（x）dx, equipped with a convolution structure. For a suitable Ф ∈ L^1 （△）, we put Фt（x） = t^-1 △（x）^-1 △（x/t）Ф（x/t） for t 〉 0 and define the radial maximal operator MФ, as usual manner. We introduce a real Hardy space H^1 （△） as the set of all locally integrable functions f on R＋ whose radial maximal function MФ （f） belongs to L^1 （△）. In this paper we obtain a relation between H^1 （△） and H^1 （R）. Indeed, we characterize H^1 （△） in terms of weighted H^1 Hardy spaces on R via the Abel transform of f. As applications of H^1 （△） and its characterization, we shall consider （H^1 （△）,L^1 （△））-boundedness of some operators associated to the Poisson kernel for Jacobi analysis： the Poisson maximal operator Me, the Littlewood-Paley g-function and the Lusin area function S. They are bounded on L^p（△） for p 〉 1, but not true for p = 1. Instead, Mp, g and a modified Sa,r are bounded from H^1 （△） to L^1 （△）.

关键词： Hardy space Jacobi analysis Littlewood-Paleyfunction Lusinfunction