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文章名     作者     期刊名     摘要     卷     期         如果没有找到您所需要的文献，请点击 ——此处申请     共51条记录   Direct-Bandgap InAs Quantum-Dots Have Long-Range Electron-Hole Exchange whereas Indirect Gap Si Dots Have Short-Range Exchange [作者：Luo, JW; Franceschetti, A; Zunger, A,期刊：Nano Letters, 页码：2648-2653 , 文章类型： Article，,卷期：2009年9-7] Excitons in quantum dots manifest a lower-energy spin-forbidden "dark" state below a spin-allowed "bright" state; this splitting originates from electron-hole (e-h) exchange interactions, which are strongly enhanced by q... Electronic Structure of Few-Layer Epitaxial Graphene on Ru(0001) [作者：Sutter, P; Hybertsen, MS; Sadowski, JT; Sutter, E,期刊：Nano Letters, 页码：2654-2660 , 文章类型： Article，,卷期：2009年9-7] The electronic structure of epitaxial monolayer, bilayer, and trilayer graphene on Ru(0001) was determined by selected-area angle-resolved photoelectron spectroscopy (micro-ARPES). Micro-ARPES band maps provide evidence ... Converse Piezoelectric Effect Induced Transverse Deflection of a Free-Standing ZnO Microbelt [作者：Hu, YF; Gao, YF; Singamaneni, S; Tsukruk, VV; Wang, ZL,期刊：Nano Letters, 页码：2661-2665 , 文章类型： Article，,卷期：2009年9-7] We demonstrate the first electric field induced transverse deflection of a single-crystal, free-standing ZnO microbelt as a result of converse piezoelectric effect. For a microbelt growing along the c-axis, a shear stres... Spacer Layer Effect in Fluorescence Enhancement from Silver Nanowires over a Silver Film; Switching of Optimum Polarization [作者：Guo, SH; Britti, DG; Heetderks, JJ; Kan, HC; Phaneuf, RJ,期刊：Nano Letters, 页码：2666-2670 , 文章类型： Article，,卷期：2009年9-7] We explore the role of coupling between silver nanowires and an underlying silver film in fluorescence enhancement from proximal molecules. Variation of the thickness of an oxide layer separating nanowire arrays from the... Dynamic Current Suppression and Gate Voltage Response in Metal-Molecule-Metal Junctions [作者：Evans, JS; Van Voorhis, T,期刊：Nano Letters, 页码：2671-2675 , 文章类型： Article，,卷期：2009年9-7] We critically re-examine conductance in benzenedithol (BDT)/gold junctions using real-time DFT simulations. Our results indicate a powerful influence of the BDT molecular charge on current, with negative charge suppressi... Parallax: High Accuracy Three-Dimensional Single Molecule Tracking Using Split Images [作者：Sun, Y; McKenna, JD; Murray, JM; Ostap, EM; Goldman, YE,期刊：Nano Letters, 页码：2676-2682 , 文章类型： Article，,卷期：2009年9-7] Three-dimensional (3D) tracking can provide valuable biological insights that are missing in conventional microscopy. Here we developed a single molecule 3D tracking microscopy technique, named Parallax, with high locali... Selective Sputtering and Atomic Resolution Imaging of Atomically Thin Boron Nitride Membranes [作者：Meyer, JC; Chuvilin, A; Algara-Siller, G; Biskupek, J; Kaiser, U,期刊：Nano Letters, 页码：2683-2689 , 文章类型： Article，,卷期：2009年9-7] We report on the preparation, atomic resolution imaging, and element selective damage mechanism in atomically thin boron nitride membranes. Flakes of less than 10 layers are prepared by mechanical cleavage and are thinne... Single-DNA Molecule Nanomotor Regulated by Photons [作者：Kang, HZ; Liu, HP; Phillips, JA; Cao, ZH; Kim, Y; Chen, Y; Yang, ZY; Li, JW; Tan, WH,期刊：Nano Letters, 页码：2690-2696 , 文章类型： Article，,卷期：2009年9-7] We report the design of a single-molecule nanomotor driven by photons. The nanomotor is a DNA hairpin-structured molecule incorporated with azobenzene moieties to facilitate reversible photocontrollable switching. Upon r... Light Coupling and Modulation in Coupled Nanowire Ring-Fabry-Perot Cavity [作者：Ma, RM; Wei, XL; Dai, L; Liu, SF; Chen, T; Yue, S; Li, Z; Chen, Q; Qin, GG,期刊：Nano Letters, 页码：2697-2703 , 文章类型： Article，,卷期：2009年9-7] CdS nanowire (NW) ring cavities were fabricated and studied for the first time. The rings with radii from 2.1 to 5.9 mu m were fabricated by a nanoprobe system installed in a scanning electron microscope. Radius dependen... Electric Field Control of Magnetoresistance in InP Nanowires with Ferromagnetic Contacts [作者：Zwanenburg, FA; van der Mast, DW; Heersche, HB; Kouwenhoven, LP; Bakkers, EPAM,期刊：Nano Letters, 页码：2704-2709 , 文章类型： Article，,卷期：2009年9-7] We demonstrate electric field control of sign and magnitude of the magnetoresistance in InP nanowires with ferromagnetic contacts. The sign change in the magneto resistance is directly correlated with a sign change in th... Ordering of the Nanoscale Step Morphology As a Mechanism for Droplet Self-Propulsion [作者：Hilner, E; Zakharov, AA; Schulte, K; Kratzer, P; Andersen, JN; Lundgren, E; Mikkelsen, A,期刊：Nano Letters, 页码：2710-2714 , 文章类型： Article，,卷期：2009年9-7] We establish a new mechanism for self-propelled motion of droplets, in which ordering of the nanoscale step morphology by sublimation beneath the droplets themselves acts to drive them perpendicular and up the surface st... Electron-Beam-Induced Deposition of Platinum from a Liquid Precursor [作者：Donev, EU; Hastings, JT,期刊：Nano Letters, 页码：2715-2718 , 文章类型： Article，,卷期：2009年9-7] We demonstrate here the first focused electron-beam-induced deposition (EBID) of nanostructures using a liquid precursor. We have deposited sub-50 nm platinum (Pt) wires and dots from a dilute, aqueous solution of chloro... Quantitative Structural Analysis of Binary Nanocrystal Superlattices by Electron Tomography [作者：Friedrich, H; Gommes, CJ; Overgaag, K; Meeldijk, JD; Evers, WH; de Nijs, B; Boneschanscher, MP; de Jongh, PE; Verkleij, AJ; de Jong, KP; van Blaaderen, A; Vanmaekelbergh, D,期刊：Nano Letters, 页码：2719-2724 , 文章类型： Article，,卷期：2009年9-7] Binary nanocrystal superlattices, that is, ordered structures of two sorts of nanocolloids, hold promise for a series of functional materials with novel collective properties. Here we show that based on electron tomograp... Chemically Induced Mobility Gaps in Graphene Nanoribbons: A Route for Upscaling Device Performances [作者：Biel, B; Triozon, F; Blase, X; Roche, S,期刊：Nano Letters, 页码：2725-2729 , 文章类型： Article，,卷期：2009年9-7] We report a first-principles based study of mesoscopic quantum transport in chemically doped graphene nanoribbons with a width up to 10 nm. The occurrence of quasi-bound states related to boron impurities results in mobi... Thermal Conductivity and Thermal Rectification in Graphene Nanoribbons: A Molecular Dynamics Study [作者：Hu, JN; Ruan, XL; Chen, YP,期刊：Nano Letters, 页码：2730-2735 , 文章类型： Article，,卷期：2009年9-7] We have used molecular dynamics to calculate the thermal conductivity of symmetric and asymmetric graphene nanoribbons (GNRs) of several nanometers in size (up to similar to 4 nm wide and similar to 10 nm long). For symm... Long-term Persistence and Spectral Blue Shifting of Quantum Dots in Vivo [作者：Fitzpatrick, JAJ; Andreko, SK; Ernst, LA; Waggoner, AS; Ballou, B; Bruchez, MP,期刊：Nano Letters, 页码：2736-2741 , 文章类型： Article，,卷期：2009年9-7] Quantum dots are a powerful fluorophore family with desirable attributes for fluorescence imaging. They have been used in several animal models with direct clinical relevance, including sentinel lymph node mapping, traci...