Category: Nanotech
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Unveiling the singular symmetry in facet-engineered 2D materials growth
by KeAi Communications Co. Controlled growth of hexagonal and rectangular non-layered 2D MnX. Credit: Advanced Powder Materials (2023). DOI: 10.1016/j.apmate.2023.100164 In a crystal, facets refer to the planes composed of different atom arrangements. In nature, crystals tend to form a polyhedral shape due to multi-facets, and realizing a single-facet in a crystal is very challenging.…
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Efficiency limit of transition metal dichalcogenide solar cells
Modeling setup The extended detailed balance method developed by Tiedje et al. (known as the Tiedje-Yablonovitch model) is used as the basis for this study13. The model was originally developed for silicon solar cells to provide an accurate estimate of their efficiency limits by incorporating the optical absorption characteristics of silicon, radiative and Auger recombination,…
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Powering a DNA origami nanoengine with chemical fuel
Powering a DNA origami nanoengine with chemical fuel Continue Reading News Source: www.nature.com
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3D microprinting of inorganic porous materials by chemical linking-induced solidification of nanocrystals
Chemicals Gold(III) chloride trihydrate (HAuCl4·3H2O, 99.9% trace metal basis, Aldrich), chloroplatinic acid hexahydrate (H2PtCl6·6H2O, ACS reagent 37.5% Pt basis, Aldrich), iron(II) chloride tetrahydrate (FeCl2·4H2O, puriss. p.a. 99%, Aldrich), silver nitrate (AgNO3, 99% ACS reagent, Aldrich), copper(II) acetylacetonate (Cu(acac)2, 99.9% trace metal basis, Aldrich), platinum(II) acetylacetonate (Pt(acac)2, 97%, Aldrich), iron(III) acetylacetonate (Fe(acac)3, 99.9%, Aldrich), cadmium oxide…
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Extendable piezo/ferroelectricity in nonstoichiometric 2D transition metal dichalcogenides
Formation pathways of nonstoichiometric 2D TMDs Generally, four types of defects are formed in nonstoichiometric compounds, including anion vacancy/interstitialcy and cation vacancy/interstitialcy. For layered TMDs materials, the intralayer atoms are covalently bonded to form a sandwiched structure, and then those layers are gathered by weak van der Waals force (such as 1 T phase MX2 three…
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Machine learning for automated experimentation in scanning transmission electron microscopy
Callister, W. D. & Rethwisch, D. G. Materials science and engineering: an introduction. Vol. 7. (John wiley & sons New York, 2007). Martin, J. D. What’s in a name change? Phys. Perspect. 17, 3–32 (2015). Article Google Scholar Betzig, E. et al. Imaging intracellular fluorescent proteins at nanometer resolution. Science 313, 1642–1645 (2006). Article CAS …
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Bio-inspired self-healing and anti-corrosion waterborne polyurethane coatings based on highly oriented graphene oxide
Molecular design, physical, mechanical, and self-healing properties of WPU The procedure for fabricating the supramolecular elastomer was convenient and controllable. WPU elastomers were synthesized through a one-pot polycondensation reaction with a mixture of PCL, HDMI, DMBA, and 4,6-diaminopyrimidine. A polymer film was obtained for subsequent measurements through the solvent-forming process, and no bubbles were observed…
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Three-dimensional atomic structure and local chemical order of medium- and high-entropy nanoalloys
Yeh, J.-W. et al. Nanostructured high-entropy alloys with multiple principal elements: Novel alloy design concepts and outcomes. Adv. Eng. Mater. 6, 299–303 (2004). Article CAS Google Scholar Cantor, B., Chang, I. T. H., Knight, P. & Vincent, A. J. B. Microstructural development in equiatomic multicomponent alloys. Mater. Sci. Eng. A 375–377, 213–218 (2004). Article Google…
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Light routing by nanoscale nonlinear interferometry with attosecond control
Conventional electronics has its speed limit in the range of a few GHz and carries high losses due to thermal heating. Photonic technologies, which use photons instead of electrons, could potentially overcome these barriers, as processing rates can reach and surpass the THz range at lower losses. However, realizing compact photonic integrated circuits that can…
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High quality factor metasurfaces for two-dimensional wavefront manipulation
Figure 1a illustrates our high-quality factor optical metasurface for wavefront manipulation in two dimensions. The surface consists of subwavelength-spaced amorphous silicon nanoblocks of length L and height H arranged in a square array with periodicity P on a transparent glass substrate. The structure dimensions are in the sub-diffractive regime, both in air and in the substrate,…