提交时间： 2017-05-02
Pan, RB [Pan, Ruobing][ 1,2 ]
Li, J [Li, Jun][ 1 ]
Zhuge, F [Zhuge, Fei][ 1 ]
Zhu, LQ [Zhu, Liqiang][ 1 ]
Liang, LY [Liang, Lingyan][ 1 ]
Zhang, HL [Zhang, Hongliang][ 1 ]
Gao, JH [Gao, Junhua][ 1 ]
Cao, HT [Cao, Hongtao][ 1 ]
Fu, B [Fu, Bing][ 1 ]
Li, K [Li, Kang][ 1 ]
摘要： Memristive devices have been widely employed to emulate biological synaptic behavior. In these cases, the memristive switching generally originates from electrical field induced ion migration or Joule heating induced phase change. In this letter, the Ti/Z
分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-03-29
摘要： We utilized a co-sputtering technique without any templates, featuring growing and etching synchronously, to delicately fabricate dense and ultra ne Ag nanowire arrays/alumina matrix composite lms. Both the diameter and separation distance of the Ag nanowire arrays in the composites are not only within the scope of sub-10 nm but also tunable, which is very hard to accomplish for the conventional optical lithography- or template-based method. It is exhibited that the collective longitudinal plasmon resonance of the composite lms, covering a wide range from visible to the near infrared region, is extremely sensitive to the geometrical parameters of the Ag nanowires, owing to the strong plasmonic coupling among neighboring nanowires. The experimental observations were also theoretically supported by the near- eld electromagnetic numerical simulation. More interestingly, the fabricated composite lms demonstrated ultrafast nonlinear optical response in the visible light region under femtosecond laser excitation, possessing a short relaxation time of 1.45 ps for the longitudinal mode (L mode) resonance. These results indicate that the proposed composite lms as a building block with exotic optical properties could provide an opportunity to construct integrated nanodevices for plasmonic optical applications.
分类： 化学 >> 核化学 提交时间： 2023-06-13
摘要： Objective: We herein fabricated a branched structure containing AO groups on polypropylene/polyethylene spun-laced nonwoven (PP/PE SNW) fibers using grafting polymerization induced by radiation (RIGP) to improve AO utilization. Methods: The chemical structures, thermal properties, and surface morphologies of the raw and treated PP/PE SNW fibers were studied. The adsorption properties were investigated using batch adsorption experiments in simulated seawater with an initial uranium concentration of 500 gL-1 (pH 4, 25℃). Results: The maximum adsorption capacity of the adsorbent material was 137.3 mgg-1 within 24 h; moreover, the uranyl removal reached 96% within 240 min. Limitations: Only simulated seawater adsorption experiments have been conducted, and real seawater adsorption experiments are yet to be conducted. Conclusions: The adsorbent had an AO utilization rate of 1/3.5 and was stable over a pH range of 410, with good selectivity and reusability, demonstrating its potential for seawater uranium extraction.
分类： 核科学技术 >> 核探测技术与核电子学 提交时间： 2022-05-20
摘要： A dilation X-ray detector (DIXD) based on time dilation and microchannel plate (MCP) gated technology has been reported. The DIXD passes a driving pulse along the transmission photocathode (PC) to obtain a dilated electron signal and finally achieves a high time resolution of 12 ps. Furthermore, the waveform of the PC driving pulse can be obtained using the DIXD, and a DIXD oscillographic function can be obtained. An experiment is presented to demonstrate the DIXD oscilloscope. The waveform of the PC driving pulse from points t1 to t12 is achieved by the DIXD. The waveform agrees well with that measured by a high-speed oscilloscope with a difference of less than 6%. The maximum theoretical bandwidth of the DIXD oscilloscope is theoretically studied. The bandwidth is limited by the potential difference between the PC and mesh. When the potential difference is 3.4 kV, the theoretical limiting bandwidth is 1000 GHz. The bandwidth increases with an increase in the potential difference.
分类： 物理学 >> 交叉学科物理及相关领域的科学与技术 提交时间： 2016-05-03
摘要： Inherited the advantages of inorganic salts and organic solvents, ionic liquids (ILs) exhibit many superior properties allowing them promising green solvents for the future. Although it has been widely acknowledged that the unique features of ILs originate from their dual ionic and organic nature, its microscopic physical origin still remains blurry. In this work, by comparing the ion/molecule cage structures obtained from molecular dynamics simulations for seven prototypic liquids-a molten inorganic salt, four ILs, a strongly polar organic solvent, and a weakly polar organic solvent, we have revealed that the depth of the cage energy landscape characterizes the ionic nature of ILs, whereas the slope and curvature of its mimimum determine the organic nature of ILs. This finding advances our understanding of ILs and thus will help their efficient utilization as well as the systematic design of novel functionalized ILs.
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