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Novel fluorescence-based and portable detection platforms using nitrogen-doped carbon dots for environmental monitoring of dichloran fungicide.
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March 2025
Department of Chemistry, Faculty of Science and Technology, Thammasat University, Pathumthani 12120, Thailand; Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok 10330, Thailand. Electronic address:
A novel fluorescence sensor utilizing label-free nitrogen self-doped carbon dots (NCDs) was developed for the sensitive, selective, and rapid determination of dichloran fungicide, popularly used in agricultural and horticultural fields. The NCDs were prepared from maleic anhydride and diethylenetriamine via a one-step pyrolysis process. They demonstrated strong blue fluorescence emission with a quantum yield of 12 %.
View Article and Find Full Text PDFThis study investigates the synthesis, characterization, and anticancer effects of carbon quantum dots (CQDs) derived from Bellardia trixago. The CQDs were analyzed using Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and X-ray Photoelectron Spectroscopy (XPS). TEM results revealed that the CQDs have a spherical morphology and exhibit a layered structure.
View Article and Find Full Text PDFDefect-induced persistent photoconductivity and nonvolatility in two-dimensional BiSe thin film for neuromorphic vision sensing capability.
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School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; Heilongjiang Provincial Key Laboratory of Advanced Quantum Functional Materials and Sensor Devices, Harbin 150001, China. Electronic address:
Optical synaptic devices (OSDs) have neuromorphic vision sensing capability showing great potential in breaking the von Neumann bottleneck and facilitating future artificial vision systems. However, the applications of two-dimensional (2D) material-based OSDs are still impeded by complicated structures, preparation techniques and so on. In this work, we propose a 2D OSD based on BiSe films prepared by a chemical vapor deposition method followed by an in-situ thermal treatment.
View Article and Find Full Text PDFExploring the Structural Origins of Optically Efficient One-Dimensional Lead Halide Perovskite Nanostructures.
J Am Chem Soc
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Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States.
Metal halide perovskites have excellent optoelectronic properties. This study aims to determine how the optoelectronic properties of a model perovskite, cesium lead bromide (CsPbBr), change with length and thickness in one dimension (1D). By examining the photophysics of CsPbBr quantum dots (QDs), nanowires (NWs), and nanorods (NRs), we observe the influence of confinement, exciton diffusion, and trapping on their optical properties.
View Article and Find Full Text PDFBeyond-classical computation in quantum simulation.
Science
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D-Wave Quantum Inc., Burnaby, British Columbia, Canada.
Quantum computers hold the promise of solving certain problems that lie beyond the reach of conventional computers. Establishing this capability, especially for impactful and meaningful problems, remains a central challenge. Here we show that superconducting quantum annealing processors can rapidly generate samples in close agreement with solutions of the Schrödinger equation.
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