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  • 1
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    Comparison of electrical and optical characteristics in gas-phase and gas-liquid phase discharges (2015)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2015-12-19
    Description: This paper presents an AC-excited argon discharge generated using a gas-liquid (two-phase) hybrid plasma reactor, which mainly consists of a powered needle electrode enclosed in a conical quartz tube and grounded deionized water electrode. The discharges in the gas-phase, as well as in the two-phase, exhibit two discharge modes, i.e., the low current glow-like diffuse mode and the high current streamer-like constrict mode, with a mode transition, which exhibits a negative resistance of the discharges. The optical emission spectral analysis shows that the stronger diffusion of the water vapor into the discharge region in the two-phase discharges boosts up the generation of OH (A–X) radicals, and consequently, leads to a higher rotational temperature in the water-phase plasma plume than that of the gas-phase discharges. Both the increase of the power input and the decrease of the argon flow rate result in the increase of the rotational temperature in the plasma plume of the water-phase discharge. The stable two-phase discharges with a long plasma plume in the water-phase under a low power input and gas flow rate may show a promising prospect for the degradation of organic pollutants, e.g., printing and dyeing wastewater, in the field of environmental protection.
    Print ISSN: 1070-664X
    Electronic ISSN: 1089-7674
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 2
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    Experimentally Robust Self-testing for Bipartite and Tripartite Entangled States (2018)
    American Physical Society (APS)
    Details
    Publication Date: 2018-12-14
    Description: Author(s): Wen-Hao Zhang, Geng Chen, Xing-Xiang Peng, Xiang-Jun Ye, Peng Yin, Ya Xiao, Zhi-Bo Hou, Ze-Di Cheng, Yu-Chun Wu, Jin-Shi Xu, Chuan-Feng Li, and Guang-Can Guo Self-testing is a method with which a classical user can certify the state and measurements of quantum systems in a device-independent way. In particular, self-testing of entangled states is of great importance in quantum information processing. An understandable example is that the maximal violatio... [Phys. Rev. Lett. 121, 240402] Published Thu Dec 13, 2018
    Keywords: General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 3
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    The transition mechanisms of the E to H mode and the H to E mode in an inductively coupled argon-mercury mixture discharge (2015)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2015-10-15
    Description: In our experiment, the transition points between the two operational modes of capacitive coupling (E mode) and inductive coupling (H mode) were investigated at a wide range of mercury vapor pressures in an inductively coupled plasma, varying with the input radio-frequency powers and the total filling pressures (10 Pa–30 Pa). The electron temperatures were calculated versus with the mercury vapor pressures for different values of the total filling pressures. The transition power points and electron density also were measured in this study. It is shown that the transition powers, whether the E to H mode transition or the H to E mode transition, are lower than that of the argon discharge, and these powers almost increase with the mercury vapor pressure rising. However, the transition electron density follows an inverse relationship with the mercury vapor pressures compared with the transition powers. In addition, at the lower pressures and higher mercury vapor pressures, an inverse hysteresis was observed clearly, which did not appear in the argon gas plasma. We suggest that all these results are attributed to the electron-neutral collision frequency changed with the additional mercury vapor pressures.
    Print ISSN: 1070-664X
    Electronic ISSN: 1089-7674
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 4
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    Mechanically encoded single-photon sources: Stress-controlled excitonic fine structures of droplet epitaxial quantum dots (2015)
    American Physical Society (APS)
    Details
    Publication Date: 2015-03-21
    Description: Author(s): Shun-Jen Cheng, Yu-Huai Liao, and Pei-Yi Lin We present numerical investigations based on the Luttinger-Kohn four-band k·p theory and, accordingly, establish a quantitatively valid model of the excitonic fine structures of droplet epitaxial GaAs/AlGaAs quantum dots under uniaxial stress control. In the formalisms, stressing a photoexcited quan... [Phys. Rev. B 91, 115310] Published Fri Mar 20, 2015
    Keywords: Semiconductors II: surfaces, interfaces, microstructures, and related topics
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
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    Observation of “wired” cell communication over 10-μm and 20-μm poly(dimethylsiloxane) barriers in tetracycline inducible expression systems (2016)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2016-01-15
    Description: Communication between cells and extracellular environments is of interest because of its critical roles in cell development and differentiation. Particularly, this signal transduction is commonly believed to rely on the contact and binding of the participating molecules/proteins, suggesting that the binding distance needed is less than a few nanometers. However, it is difficult to precisely match the rapidly binding interaction which depends on the probability of molecular collision in living systems, raising a hypothesis that another mechanism exists, could promote this signal communication, and remains unknown. Here we report that a long-range signal delivery over 10- μ m and 20- μ m polydimethylsiloxane (PDMS) barriers can be observed in microfluidically tetracycline (Tet) inducible expression systems. Results show that a significant increment of the long-range induced green fluorescent protein in human embryonic kidney 293T (HEK 293T) cells by the stimulation of Tet is demonstrated, and that such a signal induction is not dominated by Tet diffusion and displays a specific bindingless property. In addition, our experimental results, combined with theoretical modeling, suggest that this communication exhibits a bump-shaped characteristic depending on barrier thickness, materially structural property, surface roughness, and agonist concentration. It strongly relies on the PDMS barrier to delivery signal; therefore, we call such a mechanism as “wired” cell communication instead of wireless. These results could ignite interests in the novel and “wired” cell communication, which we call it X-signal , and in the use of such systems for the study of cellular biology and development of new drug.
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics (AIP)
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