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127 results for “Nanowires”
Interstitial null-distance time-domain diffuse optical spectroscopy using a superconducting nanowire detector
<p>We demonstrate a novel realization of Interstitial fiber, broadband, Time Domain Diffuse Optical Spectroscopy (TD-DOS) in Null Source-Detector separation (NSDS) approach without temporal gating, by using a Superconducting Nanowire single photon detector (SNSPD) for acquisition. As per the MEDPHOT protocol, we test experimentally, the absorption linearity of the system on tissue-equivalent liquid phantoms, and demonstrate the scattering-independent retrieval of the absorption spectrum of water using Intralipid phantoms in the wavelength range of 600-1100 nm.</p> <p>This work has been published in the Journal of Biomedical Optics - https://doi.org/10.1117/1.JBO.28.12.121202. Here, we present the dataset containing the acquired data pertaining to the aforementioned publication, including a brief overview, the tools to read it and the analysis corresponding to the figures in the article.</p>
Dataset for "Tuning the thermoelectric properties of boron-doped silicon nanowires integrated in a micro-harvester"
<p>Dataset including all data used for the elaboration of the work "Tuning the thermoelectric properties of boron-doped silicon nanowires integrated in a micro-harvester" published in Advanced Materials Technologies, 2022</p> <p><a href="https://doi.org/10.1002/admt.202101715">https://doi.org/10.1002/admt.202101715</a></p> <p>The files includes:</p> <p>· INDIVIDUAL NW data:</p> <p> - I-V data of each NW at different temperatures</p> <p> - 3w data of each NW at different temperatures<br> - 4 SEM images of the NW, each of them used for assessing one NW parameter<br> - Tip: NW diameter 2<br> - Base: NW diameter 1<br> - Overall: NW length<br> - Tilted view at 45º: Relative NW heigh over substrate</p> <p>· SEEBECK MEASUREMENT data:</p> <p> - Voc versus applied dT data for each substrate temperature<br> - File containig calibration data for all resistors</p> <p>· TEM data:</p> <p>-TEM images of the studied NWs in .dm3 format.</p> <p>· X-RAY FLUORESCENCE data:</p> <p>- Maps containing one energy spectrum per pixel in .hdf files.</p> <p>· TIP-ENHANCED RAMAN SPECTROSCOPY data:</p> <p>- Maps containing one energy spectrum per pixel in a tabulated .txt file.</p> <p>· POWER HARVESTED data:</p> <p>- IV curves of each microthermocouple connection X-Y upon different substrate temperatures in tabulated separated .txt files</p>
Dataset for the manuscript "Collective spin waves in RKKY interlayer-coupled Ni80Fe20/Ru/ Ni80Fe20 nanowire arrays"
<p>These are the dataset relative to paper entitled "<strong><span>Collective spin waves in RKKY interlayer-coupled </span></strong><strong><span>Ni</span></strong><strong><sub><span>80</span></sub></strong><strong><span>Fe</span></strong><strong><sub><span>20</span></sub></strong><strong><span>/Ru/</span></strong><strong><span> </span></strong><strong><span>Ni</span></strong><strong><sub><span>80</span></sub></strong><strong><span>Fe</span></strong><strong><sub><span>20 </span></sub></strong><strong><span>nanowire arrays</span></strong><strong>"</strong></p>
Data and code for figures: Temperature dependence of microwave losses in lumped-element resonators made from superconducting nanowires with high kinetic inductance
<p>This directory contains the datasets and code (if applicable) for generating the figures in the research article: Temperature dependence of microwave losses in lumped-element resonators made from superconducting nanowires with high kinetic inductance, <em>Supercond. Sci. Technol.</em> <strong>37</strong> 075013</p>
Polarized Emission from hexagonal-Silicon Germanium Nanowires
<p>This dataset contains the polarization dependent photoluminescence intensity measurements on hexagonal-silicon germanium nanowires. This data confirms the selection rules of the fundemental direct bandgap transition of the material. </p> <p>The data is zipped and contains a README which describes the storage of the data inside the folder.</p>
Increasing N content in GaNAsP nanowires suppresses the impact of polytypism on luminescence
<p>Cathodoluminescence (CL) and micro-photoluminescence spectroscopies are employed to investigate effects of structural defects on carrier recombination in GaNAsP nanowires (NWs) grown by molecular beam epitaxy on Si substrates. In the NWs with a low N content of 0.08%, these defects are found to promote non-radiative (NR) recombination, which causes spatial variation of the CL peak position and its intensity. Unexpectedly, these detrimental effects can be suppressed even by a small increase in the nitrogen composition from 0.08% to 0.12%. This is attributed to more efficient trapping of excited carriers/excitons to the localized states promoted by N-induced localization and also the presence of other NR channels. At room temperature, the structural defects no longer dominate in carrier recombination even in the NWs with the lower nitrogen content, likely due to increasing importance of other recombination channels. Our work underlines the need in eliminating important thermally activated NR defects, other than the structural defects, for future optoelectronic applications of these NWs.</p>
Electrical and Thermal Conductivities of Single CuxO Nanowires - Dataset
<p>This is the dataset of "Electrical and Thermal Conductivities of Single CuxO Nanowires".</p><p>This research is funded by the project 19ENG05 NanoWires. The project has received funding from the EMPIR program co-financed by the Participating States and from the European Union's Horizon 2020 research and innovation program.</p>
STEM-EELS hyperspectral data: Nanowires, Nanoparticles, Interface
<p>STEM-EELS hyperspectral datasets. These 3D datasets accompany the manuscript titled "Discovering Invariant Spatial Features in Electron Energy Loss Spectroscopy Images on the Mesoscopic and Atomic Levels" by K. Roccapriore et. al. These data are used to demonstrate correlations between pixels in space, not just energy, using what are known as multichannel rVAE models.</p> <p> </p> <p>See the following url for Jupyter Notebook walkthrough</p> <p>https://github.com/kevinroccapriore/Multichannel-rVAE</p>
Synthetic recovery of impulse propagation in myocardial infarction via silicon carbide semiconductive nanowires
<p><strong> DataSet for the publication "Synthetic recovery of impulse propagation in myocardial infarction via silicon carbide semiconductive nanowires"</strong></p> <p>Pre-processed Confocal data for Figure 3 and Supplementary Figure 3. Acquired with Leica SP8 Laser-Scanning Confocal Microscope</p> <p>Pre-processed HPICM raw data for Figure 2, Supplementary Figure 2 Acquired with Ionscope Hopping Software</p> <p>Pre-processed double-patch clamp data for Figure 2b-c. Acquired with Clampfit 10.6</p> <p>Pre-processed EP raw data for Figure 6-7-8, supplementary Figure 4. Acquired with Clampfit 10.6</p> <p>Post-processed Kinematic trajectories for Supplementary Figure 5, Supplementary Figure 6 acquired with Video Spot Tracker V 8.00</p> <p> </p> <p> </p> <p> </p>
Signatures of interactions in the Andreev spectrum of nanowire Josephson junctions
<p>Data arXiv:2112.05625</p>
Growth and analysis of the tetragonal (ST12) germanium nanowires
<p>New semiconducting materials, such as state-of-the-art alloys, engineered composites and allotropes of well-established materials can demonstrate unique physical properties and generate wide possibilities for a vast range of applications. Here we demonstrate, for the first time, the fabrication of a metastable allotrope of Ge, tetragonal germanium (ST12-Ge), in nanowire form. Nanowires were grown in a solvothermal-like single-pot method using supercritical toluene as a solvent, at moderate temperatures (290–330 °C) and a pressure of ∼48 bar. One-dimensional (1D) nanostructures of ST12-Ge were achieved <em>via</em> a self-seeded vapour–liquid–solid (VLS)-like paradigm, with the aid of an <em>in situ</em> formed amorphous carbonaceous layer. The ST12 phase of Ge nanowires is governed by the formation of this carbonaceous structure on the surface of the nanowires and the creation of Ge–C bonds. The crystalline phase and structure of the ST12-Ge nanowires were confirmed by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and Raman spectroscopy. The nanowires produced displayed a high aspect ratio, with a very narrow mean diameter of 9.0 ± 1.4 nm, and lengths beyond 4 μm. The ST12-Ge nanowire allotrope was found to have a profound effect on the intensity of the light emission and the directness of the bandgap, as confirmed by a temperature-dependent photoluminescence study.</p>
Data set for: Toggle-like current-induced Bloch point dynamics of 3D skyrmion strings in a room-temperature nanowire
<p>This data set contains both the experimental data and the simulation scripts to reproduce the results of [1]: <em>Toggle-like current-induced Bloch point dynamics of 3D skyrmion strings in a room-temperature nanowire</em> by M. T. Birch, D. Cortés-Ortuño, K. Litzius, S. Wintz, F. Schulz, M. Weigand, A. Štefančič, D. Mayoh, G. Balakrishnan, P.D. Hatton, G. Schütz. A preprint of this publication is available at <a href="https://www.researchsquare.com/article/rs-1235546/v1">https://www.researchsquare.com/article/rs-1235546/v1</a>.</p> <p>This data set is also hosted in Github: <a href="https://github.com/davidcortesortuno/paper-2022_toggle-like_current_induced_bp_dynamics_3d_skyrmion_strings">https://github.com/davidcortesortuno/paper-2022_toggle-like_current_induced_bp_dynamics_3d_skyrmion_strings</a></p> <p>If you find this material useful please cite us</p> <pre><code>@Misc{Birch2022, author = {M. T. Birch and D. Cort\'es-Ortu\~no}, title = {{Data set for: Toggle-like current-induced Bloch point dynamics of 3D skyrmion strings in a room-temperature nanowire}}, howpublished = {Zenodo \url{doi:10.5281/zenodo.6393340}. Github: \url{https://github.com/davidcortesortuno/paper-2022_toggle-like_current_induced_bp_dynamics_3d_skyrmion_strings}}, year = {2022}, doi = {10.5281/zenodo.6393340}, url = {https://doi.org/10.5281/zenodo.6393340}, }</code></pre> <p> </p>
Raw data set: One-Step Fabrication of GeSn Branched Nanowires
<p>This is the raw data set for the publication titled " One-Step Fabrication of GeSn Branched Nanowires" in the journal Chemistry of Materials (<em>Chem. Mater.</em>201931114016-4024). Below is the abstract of the publicaiton.</p> <p>Abstract: We report for the first time the self-catalysed, single step growth of branched GeSn nanostructures by a catalytic vapour-liquid-solid (VLS) mechanism. These typical GeSn nanostructures consist of <111> oriented Sn rich (~8 at. %) GeSn “branches” grown epitaxially on GeSn “trunks”, with a Sn content of ~ 4 at. %. The trunks are seeded from Au<sub>0.80</sub>Ag<sub>0.20</sub> nanoparticles followed by the catalytic growth of secondary branches (diameter ~ 50 nm) from the excess of Sn on the sidewalls of the trunks, as determined by high resolution electron microscopy and energy dispersive X-ray (EDX) analysis. The nanowires, with <111> directed GeSn branches oriented at ~ 70 ° to the trunks, have no apparent defects or change in crystal structure at the trunk-branch interface; structural quality is retained at the interface with epitaxial crystallographic relation. Electrochemical performance of these highly ordered GeSn nanostructures were explored as a potential anode material for Li-ion batteries, due to their high surface to volume ratio and increased charge carrier pathways. The unique structure of branched nanowires led to high specific capacities comparable to, or greater than, conventional Ge nanowire anode materials and Ge<sub>1-<em>x</em>­</sub>Sn<em><sub>x</sub></em><sub>­</sub> nanocrystals.We report for the first time the self-catalysed, single step growth of branched GeSn nanostructures by a catalytic vapour-liquid-solid (VLS) mechanism. These typical GeSn nanostructures consist of <111> oriented Sn rich (~8 at. %) GeSn “branches” grown epitaxially on GeSn “trunks”, with a Sn content of ~ 4 at. %. The trunks are seeded from Au<sub>0.80</sub>Ag<sub>0.20</sub> nanoparticles followed by the catalytic growth of secondary branches (diameter ~ 50 nm) from the excess of Sn on the sidewalls of the trunks, as determined by high resolution electron microscopy and energy dispersive X-ray (EDX) analysis. The nanowires, with <111> directed GeSn branches oriented at ~ 70 ° to the trunks, have no apparent defects or change in crystal structure at the trunk-branch interface; structural quality is retained at the interface with epitaxial crystallographic relation. Electrochemical performance of these highly ordered GeSn nanostructures were explored as a potential anode material for Li-ion batteries, due to their high surface to volume ratio and increased charge carrier pathways. The unique structure of branched nanowires led to high specific capacities comparable to, or greater than, conventional Ge nanowire anode materials and Ge<sub>1-<em>x</em>­</sub>Sn<em><sub>x</sub></em><sub>­</sub> nanocrystals.</p>
Stimulated Emission from Hexagonal Silicon-Germanium Nanowires
<p>Data repository in companion with the publication "Stimulated Emission from Hexagonal Silicon-Germanium Nanowires"</p>
Figures of merit that characterize silicon gate-all-around nanowire FETs affected by line edge roughness variability
<p>Off-current, threshold voltage, sub-threshold slope and on-current values for two silicon gate-all-around nanowire FETs affected by line edge roughness (LER) variability, a 22 nm gate length device and a 10 nm gate length one. The LER profile that characterizes the roughness deformation is also included in the dataset. Different correlation length (CL) and root mean square (RMS) heights values are characterized.</p>
Growth of carbon nanofibres on molybdenum carbide nanowires and their self-decoration with noble-metal nanoparticles
<p>High specific surface area makes carbon nanofibres suitable for catalyst support. Here we report on optimisation of carbon nanofibre (CNF) growth on molybdenum carbide nanowires (MoCNW) by direct carburization of Mo<sub>6</sub>S<sub>2</sub>I<sub>8</sub> nanowire bundles. Typical CNFs obtained by this method are several hundreds of nanometres long at a diameter of 10-20 nm. We show that nanofibre growth does not depend on the initial morphology of the nanowires: nanofibres grow on individual bundles of MoCNW, on dense networks of nanowires deposited on silicon substrate, and on free-standing nanowire foils. We find that carbon nanofibres remain firmly attached to the nanowires even if they are modified into Mo<sub>2</sub>C and further into MoS<sub>2</sub> nanowires. The method thus enables production of a novel hybrid material composed of MoS<sub>2</sub> nanowires densely covered with carbon nanofibres. We have additionally shown that the obtained CNFs can easily be self-decorated with platinum nanoparticles with diameters of several nanometres directly from water solution at room temperature without reducing agents. Such efficient synthesis and decoration process yield hybrid platinum/CNF/molybdenum-based NW materials, which are a promising material for a wide range of possible future applications, including sensitive sensorics and improved catalysis.</p>
SEM Images of Arrays of III-V Nanowires with Labelled Data
<p>The Dataset is a .zip folder.</p><p>The Dataset contains 240 .tiff images in black and white, each paired by file name to a .json file containing labeling information. </p><p>Each image consists of an array of 66 nanowire structures. Some images contain parasitic crystals and defective wires. Wires growing from seed surfaces parallel to and misaligned with the array walls are present.</p><p>The .json label files were created and can be processed with LabelMe (<a href="https://github.com/wkentaro/labelme">https://github.com/wkentaro/labelme</a>). The explanation for the labels can be found in the associated open-access paper currently submitted for publication.</p><p>The Licensor, IBM Corp.</p>
Optical Bias and Cryogenic Laser Readout of a Multipixel Superconducting Nanowire Single Photon Detector
<p>The complete datasets of the Publication are updloaded in this repository.</p> <p>Have a look into the ReadMe files for further information.</p> <p>Info about the Spice Model: ReadME LTSPICE</p> <p>Info about the Detector Efficiency Analysis: ReadMe Countrate</p> <p>Info about the PNR Extraction: ReadMe PNR Extraction</p> <p>Info about the SNSPD traces: ReadMe Traces </p> <p>Dataset of the Laser Diode Characterisation: IVP_Laserdiode.txt</p> <p> </p> <p> </p> <p> </p>
AFM interlaboratory comparison for nanodimensional metrology on silicon nanowires [Dataset]
<p>Dataset related to "AFM interlaboratory comparison for nanodimensional metrology on silicon nanowires" paper</p>
Raw data for "Deep mouse brain two-photon near-infrared fluorescence imaging using a superconducting nanowire single-photon detector array"
<p>Two-photon microscopy (2PM) has become an important tool in biology to study the structure and function of intact tissues in-vivo. However, adult mammalian tissues such as the mouse brain are highly scattering, thereby putting fundamental limits on the achievable imaging depth, which typically resides around 600-800um. In principle, shifting both the excitation as well as (fluorescence) emission light to the shortwave near-infrared (SWIR, 1000-1700 nm) region promises substantially deeper imaging in 2PM, yet has proven challenging in the past due to the limited availability of detectors and probes in this wavelength region. To overcome these limitations and fully capitalize on the SWIR region, in this work we introduce a novel array of superconducting nanowire single-photon detectors (SNSPDs) and associated custom detection electronics for the use in near-infrared 2PM. The SNSPD array exhibits high efficiency and dynamic range, as well as low dark-count rates over a wide wavelength range. Additionally, the electronics and software permit seamless integration into typical 2PM systems. Together with a fluorescent dye emitting at 1105 nm, we report imaging depth of > 1.1mm in the in-vivo mouse brain, limited only by available labeling density and laser power. Our work further establishes SWIR 2PM approaches and SNSPDs as promising technologies for deep tissue biological imaging. </p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.