A team led by Prof. ZENG Jie from Hefei National Laboratory for Physical Sciences at the Microscale and Prof. BAO Jun from National Synchrotron Radiation Laboratory of University of Science and Technology of China of the Chinese Academy of Sciences made breakthrough in the controlled synthesis of Pd-Pt tesseracts for ORR and the mechanism investigation of their etching process.
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IMAGE: Top: schematic of the optical sensor design with trapped molecules. Bottom: schematic showing the process of concentrating and trapping molecules in a solution. view more
Credit: by Xianglong Miao, Lingyue Yan, Yun Wu and Peter Q. Liu
Optical sensors can quantitatively analyze chemical and biological samples by measuring and processing the optical signals produced by the samples. Optical sensors based on infrared absorption spectroscopy can achieve high sensitivity and selectivity in real time, and therefore play a crucial role in a variety of application areas such as environmental sensing, medical diagnostics, industrial process control and homeland security.
In a new paper published in
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IMAGE: A record-high CO2 conversion rates at relatively low temperatures in a modified chemical-looping version of RWGS using a novel copper-indium oxide view more
Credit: Waseda University
With ever-worsening climate change, there is a growing need for technologies that can capture and use up the atmospheric CO
2 (carbon dioxide) and reduce our carbon footprint. Within the realm of renewable energy, CO
2-based e-fuels have emerged as a promising technology that attempts to convert atmospheric CO
2 into clean fuels. The process involves production of synthetic gas or syngas (a mixture of hydrogen and carbon monoxide (CO)). With the help of the reverse water-gas shift (RWGS) reaction, CO
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Irvine, Calif., Jan. 11, 2021 - Often admired for their flawless appearance to the naked eye, crystals can have defects at the nanometer scale, and these imperfections may affect the thermal and heat transport properties of crystalline materials used in a variety of high-technology devices.
Employing newly developed electron microscopy techniques, researchers at the University of California, Irvine and other institutions have, for the first time, measured the spectra of phonons - quantum mechanical vibrations in a lattice - at individual crystalline faults, and they discovered the propagation of phonons near the flaws. The team s findings are the subject of a study published recently in
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IMAGE: An illustration of the chain-reaction process that underlies the photon avalanching mechanism Columbia Engineering researchers have realized in their nanoparticles. In this process, the absorption of a single low-energy photon. view more
Credit: Miko?aj ?ukaszewicz/ Polish Academy of Sciences
New York, NY January 13, 2021 Researchers at Columbia Engineering report today that they have developed the first nanomaterial that demonstrates photon avalanching, a process that is unrivaled in its combination of extreme nonlinear optical behavior and efficiency. The realization of photon avalanching in nanoparticle form opens up a host of sought-after applications, from real-time super-resolution optical microscopy, precise temperature and environmental sensing, and infrared light detection, to optical analog-to-digital conversion and quantum sensing.