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7,212 Newest Publications in nano letters

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Probing Excitons, Trions, and Dark Excitons in Monolayer WS2 Using Resonance Raman Spectroscopy

11-Jan-2018 | Liam P. McDonnell; Chung-Che Huang; Qingsong Cui; Dan W. Hewak; David C. Smith, Nano Letters, 2018

We present temperature-dependent resonance Raman measurements on monolayer WS2 for the temperature range 4–295 K using excitation photon energies from 1.9 to 2.15 eV in ∼7 meV steps. These are analyzed to determine the resonance profiles of five previously assigned phonon based Raman peaks (A1′, ...

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Controlling and Predicting Nanoparticle Formation by Block Copolymer Directed Rapid Precipitations

10-Jan-2018 | Robert F. Pagels; Jasmine Edelstein; Christina Tang; Robert K. Prud’homme, Nano Letters, 2018

Nanoparticles have shown promise in several biomedical applications, including drug delivery and medical imaging; however, quantitative prediction of nanoparticle formation processes that scale from laboratory to commercial production has been lacking. Flash NanoPrecipitation (FNP) is a scalable ...

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In Situ Investigation on the Nanoscale Capture and Evolution of Aerosols on Nanofibers

09-Jan-2018 | Rufan Zhang; Bofei Liu; Ankun Yang; Yangying Zhu; Chong Liu; Guangmin Zhou; Jie Sun; Po-Chun Hsu; Wenting Zhao; Ding ..., Nano Letters, 2018

Aerosol-induced haze problem has become a serious environmental concern. Filtration is widely applied to remove aerosols from gas streams. Despite classical filtration theories, the nanoscale capture and evolution of aerosols is not yet clearly understood. Here we report an in situ investigation ...

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Coherent Discriminatory Modal Manipulation of Acoustic Phonons at the Nanoscale

09-Jan-2018 | Shang-Jie Yu; Min Ouyang, Nano Letters, 2018

Understanding and controlling the phononic characteristics in solids is crucial to elucidate many physical phenomena and develop new phononic devices with optimal performance. Although substantial progress on the spatial control of phonons by material design has been achieved, the manipulation of ...

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Emergence of Interfacial Polarons from Electron–Phonon Coupling in Graphene/h-BN van der Waals Heterostructures

09-Jan-2018 | Chaoyu Chen; José Avila; Shuopei Wang; Yao Wang; Marcin Mucha-Kruczyński; Cheng Shen; Rong Yang; Benjamin Nosarzewsk ..., Nano Letters, 2018

van der Waals heterostructures, vertical stacks of layered materials, offer new opportunities for novel quantum phenomena which are absent in their constituent components. Here we report the emergence of polaron quasiparticles at the interface of graphene/hexagonal boron nitride (h-BN) ...

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Persistent Charge-Density-Wave Order in Single-Layer TaSe2

09-Jan-2018 | Hyejin Ryu; Yi Chen; Heejung Kim; Hsin-Zon Tsai; Shujie Tang; Juan Jiang; Franklin Liou; Salman Kahn; Caihong Jia; A ..., Nano Letters, 2018

We present the electronic characterization of single-layer 1H-TaSe2 grown by molecular beam epitaxy using a combined angle-resolved photoemission spectroscopy, scanning tunneling microscopy/spectroscopy, and density functional theory calculations. We demonstrate that 3 × 3 charge-density-wave ...

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Monochromatic Photocathodes from Graphene-Stabilized Diamondoids

09-Jan-2018 | Hao Yan; Karthik T. Narasimha; Jonathan Denlinger; Fei Hua Li; Sung-Kwan Mo; J. Nathan Hohman; Jeremy E. P. Dahl; Ro ..., Nano Letters, 2018

The monochromatic photoemission from diamondoid monolayers provides a new strategy to create electron sources with low energy dispersion and enables compact electron guns with high brightness and low beam emittance for aberration-free imaging, lithography, and accelerators. However, these ...

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Creation of Single Chain of Nanoscale Skyrmion Bubbles with Record-High Temperature Stability in a Geometrically Confined Nanostripe

09-Jan-2018 | Zhipeng Hou; Qiang Zhang; Guizhou Xu; Chen Gong; Bei Ding; Yue Wang; Hang Li; Enke Liu; Feng Xu; Hongwei Zhang; Yuan ..., Nano Letters, 2018

Nanoscale topologically nontrivial spin textures, such as magnetic skyrmions, have been identified as promising candidates for the transport and storage of information for spintronic applications, notably magnetic racetrack memory devices. The design and realization of a single skyrmion chain at ...

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Surface Photovoltage Measurements on a Particle Tandem Photocatalyst for Overall Water Splitting

09-Jan-2018 | Mauricio A. Melo, Jr.; Zongkai Wu; Benjamin A. Nail; Alexandra T. De Denko; Ana F. Nogueira; Frank E. Osterloh, Nano Letters, 2018

Surface photovoltage spectroscopy (SPS) is used to measure the photopotential across a Ru–SrTiO3:Rh/BiVO4 particle tandem overall water splitting photocatalyst. The tandem is synthesized from Ru-modified SrTiO3:Rh nanocrystals and BiVO4 microcrystals by electrostatic assembly followed by thermal ...

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Chaperonin-GroEL as a Smart Hydrophobic Drug Delivery and Tumor Targeting Molecular Machine for Tumor Therapy

09-Jan-2018 | Yi Yuan; Chong Du; Cuiji Sun; Jin Zhu; Shan Wu; Yinlong Zhang; Tianjiao Ji; Jianlin Lei; Yinmo Yang; Ning Gao; Guang ..., Nano Letters, 2018

The targeted delivery of hydrophobic therapeutic drugs to tumors is one of the major challenges in drug development. The use of natural proteins as drug delivery vehicles holds great promise due to various functionalities of proteins. In the current study, we exploited a natural protein, GroEL, ...

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