Landau level laser | Nature Photonics

1. Schneider, J. Stimulated emission of radiation by relativistic electrons in a magnetic field. Phys. Rev. Lett. 2, 504–505 (1959). ADS  Google Scholar  2. Lax, B. Cyclotron resonance and impurity levels in semiconductors. In Proc. International Symposium on Quantum Electronics (ed. Townes, C. H.) 428 (Columbia Univ. Press, 1960). 3. Wolff, P. A. Proposal for… Continue reading Landau level laser | Nature Photonics

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Photoluminescence mechanism of carbon dots: triggering high-color-purity red fluorescence emission through edge amino protonation

Particle morphology and structure As shown in Fig. 1a, transmission electron microscope (TEM) images at 50 nm resolution demonstrate that the prepared CDs are well dispersed in aqueous solution. The inset image of Fig. 1a shows that the particle size of CDs is distributed in the range from 1 to 3 nm with the average dimension of 2 nm. High-resolution… Continue reading Photoluminescence mechanism of carbon dots: triggering high-color-purity red fluorescence emission through edge amino protonation

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Using the principle behind coffee ring effect in quantum dot arrays

Schematic in which quantum dots enter the V-shaped structure (left) and a schematic image of RGB QD pixels created using the method (right). Credit: POSTECH If spilled coffee is not immediately wiped off, it leaves behind a stain where the edges are darker than the rest. This phenomenon is called the coffee ring effect. Using… Continue reading Using the principle behind coffee ring effect in quantum dot arrays

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For the first time, DNA and proteins sensed by de novo-designed nanopore

De novo design of a nanopore for single-molecule detection that incorporates a β-hairpin peptide. Credit: Ryuji Kawano, Tokyo University of Agriculture and Technology Researchers in Japan have designed the first bottom-up designed peptides, comprising chains of amino acids, that can form artificial nanopores to identify and enable single molecule-sorting of genetic material in a lipid… Continue reading For the first time, DNA and proteins sensed by de novo-designed nanopore

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Lightwave-driven scanning tunneling spectroscopy of atomically precise graphene nanoribbons

A schematic representing a microscopy measurement where a pulse of laser light (red curve) illuminates an atomically sharp needle (top) positioned above the sample surface. The graphene nanoribbon sits on top of a gold substrate. Experimental data is shown in blue, revealing the distribution of electrons above the nanoribbon. Credit: Spencer Ammerman When physicist Tyler… Continue reading Lightwave-driven scanning tunneling spectroscopy of atomically precise graphene nanoribbons

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Salvaging rare earth elements from electronic waste

Amir Sheikhi, Penn State assistant professor of chemical engineering, found a new process to separate and recycle rare earth elements using plant cellulose, an inexpensive renewable resource found in paper, cotton and pulp, like the paper towel shown here. The vial contains the nanoparticles that are used to separate rare earth elements from old computers… Continue reading Salvaging rare earth elements from electronic waste

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Development of nanoparticles derived from corn as mass producible bionanoparticles with anticancer activity

Materials Fetal bovine serum (FBS) was obtained from Biosera (East Sussex, UK); nonessential amino acid solution (NEAA), CPZ, sodium phosphotungstate, and 4% PFA were obtained from Nacalai Tesque, Inc. (Kyoto, Japan). PC, cholesterol, and PE were kindly provided by Nippon Fine Chemical Co., Ltd. (Tokyo, Japan). Chloroform, methanol, penicillin–streptomycin-L-glutamine solution (× 100) (PSG), and PI were obtained… Continue reading Development of nanoparticles derived from corn as mass producible bionanoparticles with anticancer activity

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The emergence of high room temperature in-plane and out-of-plane magnetostriction in polycrystalline CoFe2O4 film

The Grazing Incidence X-ray Diffraction (GIXRD) profile of the CFO film over the specified angular range has been shown in Fig. 1a. The profile indicates that the deposited film is polycrystalline. The observed peaks are indexed with the help of a standard JCPDS file (JCPDS card. no. 22-1086), and it reveals the formation of a single-phase… Continue reading The emergence of high room temperature in-plane and out-of-plane magnetostriction in polycrystalline CoFe2O4 film

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Mixed convective flow of CNTs nanofluid subject to varying viscosity and reactions

In this analysis, it is considered that two-dimensional incompressible mixed convective flow of CNTs nanoliquid by stretchable cylinder. The liquid flow is caused by stretching cylinder. The viscosity of base liquid varies with the variation of temperature. Base liquid contains homogeneous combination of CNTs particles. Further more, CNTs particles and base liquid are in thermal… Continue reading Mixed convective flow of CNTs nanofluid subject to varying viscosity and reactions

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Distribution control enables efficient reduced-dimensional perovskite LEDs

1. Kim, Y.-H. et al. Comprehensive defect suppression in perovskite nanocrystals for high-efficiency light-emitting diodes. Nat. Photon. 15, 148–155 (2021). ADS  CAS  Article  Google Scholar  2. Hong, K., Le, Q. V., Kim, S. Y. & Jang, H. W. Low-dimensional halide perovskites: review and issues. J. Mater. Chem. C 6, 2189 (2018). CAS  Article  Google Scholar … Continue reading Distribution control enables efficient reduced-dimensional perovskite LEDs

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