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7,132 Newest Publications in nano letters

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Minimum Line Width of Surface Plasmon Resonance in Doped ZnO Nanocrystals

05-Dec-2017 | Christophe Delerue, Nano Letters, 2017

The optical response of ZnO nanocrystals (NCs) doped with Al (Ga) impurities is calculated using a model that incorporates the effects of quantum confinement, dielectric mismatch, surface, and ionized impurity scattering. For dopant concentrations of a few percent, the NC polarizability is ...

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Deterministic Line-Shape Programming of Silicon Nanowires for Extremely Stretchable Springs and Electronics

04-Dec-2017 | Zhaoguo Xue; Mei Sun; Taige Dong; Zhiqiang Tang; Yaolong Zhao; Junzhuan Wang; Xianlong Wei; Linwei Yu; Qing Chen; Ju ..., Nano Letters, 2017

Line-shape engineering is a key strategy to endow extra stretchability to 1D silicon nanowires (SiNWs) grown with self-assembly processes. We here demonstrate a deterministic line-shape programming of in-plane SiNWs into extremely stretchable springs or arbitrary 2D patterns with the aid of ...

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Individual Atomic Imaging of Multiple Dopant Sites in As-Doped Si Using Spectro-Photoelectron Holography

04-Dec-2017 | Kazuo Tsutsui; Tomohiro Matsushita; Kotaro Natori; Takayuki Muro; Yoshitada Morikawa; Takuya Hoshii; Kuniyuki Kakush ..., Nano Letters, 2017

The atomic scale characterization of dopant atoms in semiconductor devices to establish correlations with the electrical activation of these atoms is essential to the advancement of contemporary semiconductor process technology. Spectro-photoelectron holography combined with first-principles ...

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Producing Atomically Abrupt Axial Heterojunctions in Silicon–Germanium Nanowires by Thermal Oxidation

04-Dec-2017 | Hsin-Yu Lee; Tzu-Hsien Shen; Chen-Yu Hu; Yun-Yi Tsai; Cheng-Yen Wen, Nano Letters, 2017

Compositional abruptness of the interfaces is one of the important factors to determine the performance of Group IV semiconductor heterojunction (Si/Ge or Si/SiGe) nanowire devices. However, forming abrupt interfaces in the nanowires using the common vapor–liquid–solid (VLS) method is restricted ...

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Single-Cell Optical Distortion Correction and Label-Free 3D Cell Shape Reconstruction on Lattices of Nanostructures

04-Dec-2017 | Jürgen Stephan; Felix Keber; Valentin Stierle; Joachim O. Rädler; Philipp Paulitschke, Nano Letters, 2017

Imaging techniques can be compromised by aberrations. Especially when imaging through biological specimens, sample-induced distortions can limit localization accuracy. In particular, this phenomenon affects localization microscopy, traction force measurements, and single-particle tracking, which ...

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Designing Diameter-Modulated Heterostructure Nanowires of PbTe/Te by Controlled Dewetting

04-Dec-2017 | Abinash Kumar; Subhajit Kundu; Debadarshini Samantaray; Paromita Kundu; Daniele Zanaga; Sara Bals; N. Ravishankar, Nano Letters, 2017

Heterostructures consisting of semiconductors with controlled morphology and interfaces find applications in many fields. A range of axial, radial, and diameter-modulated nanostructures have been synthesized primarily using vapor phase methods. Here, we present a simple wet chemical routine to ...

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Understanding the Aqueous Stability and Filtration Capability of MoS2 Membranes

04-Dec-2017 | Zhongying Wang; Qingsong Tu; Sunxiang Zheng; Jeffrey J. Urban; Shaofan Li; Baoxia Mi, Nano Letters, 2017

Membranes made of layer-stacked two-dimensional molybdenum disulfide (MoS2) nanosheets have recently shown great promise for water filtration. At present, the reported water fluxes vary significantly, while the accountable structure and properties of MoS2 nanochannels are largely unknown. This ...

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Highly Tunable Electronic Structures of Phosphorene/Carbon Nanotube Heterostructures through External Electric Field and Atomic Intercalation

04-Dec-2017 | Xiao-Qing Tian; Xiang-Rong Wang; Ya-Dong Wei; Lin Liu; Zhi-Rui Gong; Juan Gu; Yu Du; Boris I. Yakobson, Nano Letters, 2017

Black phosphorene (BP)/carbon nanotube (CNT) heterostructures can be classified as either type I or II, depending on the size of the CNTs. An external electric field (Eext) can modulate the interfacial electronic structures and separate the electron and hole carriers of the BP/CNT ...

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Ultrasensitive Ethene Detector Based on a Graphene–Copper(I) Hybrid Material

04-Dec-2017 | Wangyang Fu; Thomas F. van Dijkman; Lia M. C. Lima; Feng Jiang; Grégory F. Schneider; Elisabeth Bouwman, Nano Letters, 2017

Ethene is a highly diffusive and relatively unreactive gas that induces aging responses in plants in concentrations as low as parts per billion. Monitoring concentrations of ethene is critically important for transport and storage of food crops, necessitating the development of a new generation ...

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Sulfur Adatom and Vacancy Accelerate Charge Recombination in MoS2 but by Different Mechanisms: Time-Domain Ab Initio Analysis

04-Dec-2017 | Linqiu Li; Run Long; Thomas Bertolini; Oleg V. Prezhdo, Nano Letters, 2017

Two-dimensional transition metal dichalcogenides (TMDs) have appeared on the horizon of materials science and solid-state physics due to their unique properties and diverse applications. TMD performance depends strongly on material quality and defect morphology. Calculations predict that sulfur ...

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