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Your search keyword '"Zhou, Xian-Jing"' showing total 19 results
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19 results on '"Zhou, Xian-Jing"'

2. Non-Ohmic negative longitudinal magnetoresistance in two-dimensional electron gas

Author

Lyu, Yang-Yang, Zhou, Xian-Jing, Xiao, Zhi-Li, Fotovat, Roxanna, Xu, Jing, Basnet, Gobind, Wang, Yong-Lei, Jin, Dafei, Divan, Ralu, Wang, Hua-Bing, and Kwok, Wai-Kwong

Subjects
Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Negative longitudinal magnetoresistance (NLMR) has been reported in a variety of materials and has attracted extensive attention as an electrotransport hallmark of topological Weyl semimetals. However, its origin is still under debate. Here, we demonstrate that the NLMR in a two dimensional electron gas can be influenced by the measurement current. While the NLMR persists up to 130 K, its magnitude and magnetic field response become dependent on the applied current below 60 K. The tunable NLMR at low and high currents can be best attributed to quantum interference and disorder scattering effects, respectively. This work uncovers non-Ohmic NLMR in a non-Weyl material and highlights potential effects of the measurement current in elucidating electrotransport phenomena. We also demonstrate that NLMRs can be a valuable phenomenon in revealing the origins of other properties, such as negative MRs in perpendicular magnetic fields.

Published
2021
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8. Thermo-sensitive Microgels Supported Gold Nanoparticles as Temperature-mediated Catalyst

Author

Zhou, Xian-Jing, Lu, Hai-Peng, Kong, Ling-Li, Zhang, Dong, Zhang, Wei, Nie, Jing-Jing, Yuan, Jia-Yin, Du, Bin-Yang, Wang, Xin-Ping, Zhou, Xian-Jing, Lu, Hai-Peng, Kong, Ling-Li, Zhang, Dong, Zhang, Wei, Nie, Jing-Jing, Yuan, Jia-Yin, Du, Bin-Yang, and Wang, Xin-Ping

Abstract

Microgels with a thermo-sensitive poly(N-isopropylacrylamide) (polyNIPAm) backbone and bis-imidazolium (VIM) ionic cross-links, denoted as poly(NIPAm-co-VIM), were successfully prepared. The as-synthesized ionic microgels were converted to nanoreactors, denoted as Au@PNI MGs, upon generation and immobilization of gold nanoparticles (Au NPs) of 5-8 nm in size into poly(NIPAm-co-VIM). The content of Au NPs in microgels could be regulated by controlling the 1,6-dibromohexane/vinylimidazole molar ratio in the quaternization reaction. The microgel-based nanoreactors were morphologically spherical and uniform in size, and presented reversible thermo-sensitive behavior with volume phase transition temperatures (VPTTs) at 39-40 degrees C. The Au@PNI MGs were used for the reduction of 4-nitrophenol, of which the catalytic activity could be modulated by temperature.

Published
2019
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10. Evidence for multi-gap symmetry from grain boundary effects in polycrystalline ${\mathrm{Ba}}_{0.6}{{\rm{K}}}_{0.4}{\mathrm{Fe}}_{2}{\mathrm{As}}_{2}$ microbridge

Author

Huang, Ya, primary, Zhou, Xian-Jing, additional, Gao, Zhao-Shun, additional, Wu, Hao, additional, He, Ge, additional, Yuan, Jie, additional, Jin, Kui, additional, Pereira, Paulo J, additional, Ji, Min, additional, An, De-Yue, additional, Li, Jun, additional, Hatano, Takeshi, additional, Jin, Biao-Bing, additional, Wang, Hua-Bing, additional, and Wu, Pei-Heng, additional

Published
2016
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13. High upper critical fields of superconducting Ca10(Pt4As8)(Fe1.8Pt0.2As2)5 whiskers

Author

Li, Jun, primary, Zhang, Gufei, additional, Hu, Wei, additional, Huang, Ya, additional, Ji, Min, additional, Sun, Han-Cong, additional, Zhou, Xian-Jing, additional, An, De-Yue, additional, Hao, Lu-Yao, additional, Zhu, Qiang, additional, Yuan, Jie, additional, Jin, Kui, additional, Guo, Hong-Xuan, additional, Fujita, Daisuke, additional, Hatano, Takeshi, additional, Yamaura, Kazunari, additional, Takayama-Muromachi, Eiji, additional, Wang, Hua-Bing, additional, Wu, Pei-Heng, additional, Vanacken, Johan, additional, and Moshchalkov, Victor V., additional

Published
2015
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18. Synthesis of an Amphiphilic Brush Copolymer by a Highly Efficient 'Grafting onto' Approach via CO2 Chemistry.

Author

Zhang, Ying‐Ying, Li, Yang, Zhou, Xian‐Jing, Zhang, Xing‐Hong, Du, Bin‐Yang, and Fan, Zhi‐Qiang

Subjects
COPOLYMERIZATION, AMPHIPHILES, CARBON dioxide, SURFACE grafting (Polymer chemistry), GLYCIDYL methacrylate, POLYETHYLENE glycol
Abstract

A novel and robust route for the synthesis of a new amphiphilic brush copolymer, poly(glycidyl methacrylate)-graft-polyethylene glycol (PGMA- g-PEG), with high grafting densities of 97%-98% through a 'grafting onto' method via carbon dioxide chemistry is reported. PGMA- g-PEG can self-assemble and form stable spherical core-shell micelles in aqueous solution. Besides, the obtained PGMA- g-PEG polymer contains hydroxyurethane structures as the junction sites between the PGMA backbone and PEG side chain, which can be used for further modification. [ABSTRACT FROM AUTHOR]

Published
2015
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19. Determination of Amino Acids in Plasma and Nutritional Supplements by Capillary Electrophoresis with Copper(II) Coordination.

Author

Zhou, Xian-Jing, Chen, Juan, and Shi, Yan-Ping

Subjects
*AMINO acids, *CAPILLARY electrophoresis, *COPPER compounds, *COORDINATION compounds, *DERIVATIZATION, *ISOPROPYL alcohol
Abstract

A capillary zone electrophoresis (CZE) method was developed using interactions between amino acids and copper(II) without derivatization. The optimized separation buffer included 10% isopropanol, 50 mmol L−1CuSO4, 50 mmol L−1acetic acid, and 50 mmol L−1sodium acetate at pH = 3.98 at a detection wavelength of 233 nm. This method allowed baseline separation and determination of ten amino acids in less than 21 min. Quality parameters such as linearity (r > 0.99), precision (relative standard deviation <2.51%), limits of detection (0.05 µg mL−1), and recovery (82.25% to 117.6%) were measured. The separation of amino acids in high salt solutions was explored. The method was used to directly determine amino acids in human plasma and nutritional supplements. [ABSTRACT FROM PUBLISHER]

Published
2015
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