Category: Nanotech
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Listening to nanoscale avalanches of atoms in crystals
by ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) Crackling noise detection based on AFM nanoindentation. a A constant force, typically in the nN range and depending on material hardness, is applied over a long period (hours) through an AFM probe and surface movement is detected at the limit of the AFM’s sensitivity,…
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Guiding the design of silicon devices with improved efficiency
Aug 23, 2023 (Nanowerk News) Silicon is one of the most pervasive functional materials of the modern age, underpinning semiconductor technologies ranging from microelectronics to solar cells. Indeed, silicon transistors enable computing applications from cell phones to supercomputers, while silicon photovoltaics are the most widely deployed solar-cell technology to date. The U.S. Department of Energy…
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Listening to nanoscale earthquakes
Aug 23, 2023 (Nanowerk News) A recent UNSW-led paper published in Nature Communications (“Crackling noise microscopy”) presents an exciting new way to listen to avalanches of atoms in crystals. The nanoscale movement of atoms when materials deform leads to sound emission. This so-called crackling noise is a scale-invariant phenomenon found in various material systems as…
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Thiol-based defect healing of WSe2 and WS2
Defect healing process Figure 1 depicts the schematics of defects and healing after thiol treatments on CVD-grown WSe224. WSe2 crystals were grown by CVD on SiO2/Si substrates (see “Methods”) and then kept at ambient conditions for 4 months before their defect density was assessed. These spontaneously oxidized samples were the starting point of this work…
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Data-mining unveils structure–property–activity correlation of viral infectivity enhancing self-assembling peptides
Characterization of a peptide library based on EF-C derivatives To unveil the structure–property–activity relationship of infectivity enhancing peptides, we performed a data-mining approach. This procedure involves data-generation by creating a peptide library, processing and analyses of the peptide measurements, establishing a model for the structure–property–activity relationship, and finally interpretation and prediction based on the established…
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Microwave-assisted one-step synthesis of water-soluble manganese-carbon nanodot clusters
The synthesis of Mn–CND–Cs 1 was achieved in one-step using a MW reactor under controlled conditions (240 °C, 27 bar, 200 W and 1 h heating time). We employed ethylenediaminetetraacetic acid (EDTA), ethylenediamine (EDA) and MnCl2·4H2O as precursors. Their molar ratio was carefully optimized to afford homogeneous nanometric particles after filtration and dialysis (Fig. 1A, B, see Supporting Information for…
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Proton transport through nanoscale corrugations in two-dimensional crystals
Device fabrication Micrometre-sized apertures were etched into silicon-nitride-coated silicon substrates (500 nm SiNx) using photolithography, wet etching and reactive ion etching, following the protocol previously reported8. Our devices had several apertures next to each other and were 2 μm in diameter each (Extended Data Fig. 1). Monolayers of graphene and hBN were obtained by micromechanical cleavage31 and…
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Stable trapping of multiple proteins at physiological conditions using nanoscale chambers with macromolecular gates
The trapping concept based on nanochambers and macromolecular gates is described in Fig. 1a. A critical component in the system is the responsive polymer brush21,22,23 which switches between an extended (closed gate) and a collapsed state (open gate). We have previously shown that hydrophilic polymer brushes can be very strong barriers for proteins24. At the same…
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Mimicking reductive dehalogenases for efficient electrocatalytic water dechlorination
Binding pocket-like configurations of electrodes To design and fabricate the binding pocket-like electrocatalyst, the structure, and function of the B12-dependent dehalogenase were fully dissected. Microbial reductive dechlorination occurs at the binding pocket of dehalogenase, including the cofactor (B12) and the surrounding key residues with aromatic rings and hydroxyl groups18. Substrates with carbon−chlorine (C−Cl) bonds are…
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The proportional Caputo operator approach to the thermal transport of Jeffery tri-hybrid nanofluid in a rotating frame with thermal radiation
Hayat, T., Qayyum, S., Imtiaz, M. & Alsaedi, A. Three-dimensional rotating flow of Jeffrey fluid for Cattaneo-Christov heat flux model. AIP Adv. 6(2), 025012 (2016). Article ADS Google Scholar Choi, S. U., & Eastman, J. A. Enhancing thermal conductivity of fluids with nanoparticles (No. ANL/MSD/CP-84938; CONF-951135–29). Argonne National Lab.(ANL), Argonne, IL (United States). (1995) Ali,…