Science, 202 1, vol. 373, No.6555.
Science, vol. 373, No.6555, August 6, 2002/kloc-0.
Physics physics
Quantum enhanced sensing of displacement and electric field with two-dimensional trapped ion crystal
Quantum enhanced sensing of displacement and electric field by two-dimensional trapped ion crystal
Authors: Kevin A. gilmour, Matthew Affolter, Robert J. Lewis-Swan, Diego Barberena, Elena Jordan, Annamaria Rey.
Link:
While maintaining effective radiation cooling capability. The practical application test shows that the temperature of the human body covered with our metaf abric is about 4.8℃ lower than that covered with commercial cotton fabric. The cost-effectiveness and high performance of our metafabrics bring great advantages to smart clothing, smart textiles and passive radiation cooling applications.
Semiconductor Quantum Dots: Technological Progress and Future Challenges
Semiconductor Quantum Dots: Technological Progress and Future Challenges
Authors: F. Pelayo Garcí a de Arquer, Dmitri V. Talapin, Victor I. Klimov, Yasuhiko Arakawa, Manfred Bayer, Edward H. Sargent.
Link:
Compared with bulk solids. This makes it possible to design materials with adjustable chemical, physical, electrical and optical properties. Zero-dimensional semiconductor quantum dots (QDs) provide strong light absorption and bright narrow-band emission in the visible and infrared wavelength range, and have been designed to show optical gain and laser emission. These properties are significant for imaging, solar energy collection, display and communication. Here, we summarize the progress in the synthesis and understanding of QD nanomaterials, focusing on colloidal quantum dots, and discuss their prospects in display and lighting, laser, sensing, electronics, solar energy conversion, photocatalysis and quantum information technology.
Chemical chemistry
Observe the hydroperoxide alkyl radical (? QOOH) dissociation
Observe the alkyl hydroperoxide (? QOOH) dissociation
Authors: Anne S. Hansen, Trisha Bhagde, Kevin B. Moore III, Daniel R. Moberg, Ahren W. Jasper, Yuri Georgievskii, etc.
Link:
The infrared fingerprint and energy-dependent single molecule decay into hydroxyl radical and cyclic ether products were directly observed. Direct time domain measurement? In a wide range of energy, it is found that the dissociation rate of QOOH is consistent with the theoretical prediction using the latest electronic structure characterization of the transition potential barrier region. Single molecule decay is enhanced by the O-O extension and C-C-O angular contraction of a large number of heavy atoms tunneling along the reaction path. The master equation model produces a completely prior prediction of the pressure-dependent thermal single molecule dissociation rate. The QOOH intermediate-heavy atom tunneling has increased again-which is needed by the global model of atmosphere and combustion chemistry.