http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Surface oxidation and thermoelectric properties of indium-doped tin telluride nanowires
Li, Zhen,Xu, Enzhi,Losovyj, Yaroslav,Li, Nan,Chen, Aiping,Swartzentruber, Brian,Sinitsyn, Nikolai,Yoo, Jinkyoung,Jia, Quanxi,Zhang, Shixiong The Royal Society of Chemistry 2017 Nanoscale Vol.9 No.35
<P>The recent discovery of excellent thermoelectric properties and topological surface states in SnTe-based compounds has attracted extensive attention in various research areas. Indium doped SnTe is of particular interest because, depending on the doping level, it can either generate resonant states in the bulk valence band leading to enhanced thermoelectric properties, or induce superconductivity that coexists with topological states. Here we report on the vapor deposition of In-doped SnTe nanowires and the study of their surface oxidation and thermoelectric properties. The nanowire growth is assisted by Au catalysts, and their morphologies vary as a function of substrate position and temperature. Transmission electron microscopy characterization reveals the formation of an amorphous surface in single crystalline nanowires. X-ray photoelectron spectroscopy studies suggest that the nanowire surface is composed of In2O3, SnO2, Te and TeO2which can be readily removed by argon ion sputtering. Exposure of the cleaned nanowires to atmosphere leads to rapid oxidation of the surface within only one minute. Characterization of electrical conductivity<I>σ</I>, thermopower<I>S</I>, and thermal conductivity<I>κ</I>was performed on the same In-doped nanowire which shows suppressed<I>σ</I>and<I>κ</I>but enhanced<I>S</I>yielding an improved thermoelectric figure of merit<I>ZT</I>compared to the undoped SnTe.</P>
Research on Laser Thread Form Bending of Stainless Steel Tube
Fuqiang Li,Shourong Liu,Aiping Shi,Qiulu Chu,Qiang Shi,Yuxiang Li 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.20 No.6
Compared to traditional bending methods, laser bending can yield products with better shapes and higher quality using the simpler equipment. In this paper, the mechanism of Laser-assisted tube bending is elaborated, and then the influence of processing parameters (including laser power, scanning speed, spot diameter, and scanning times) on the bending angle is studied with both the finite element method and experiments. The bending angle increases with an increase of laser power and spot diameter and with a decrease in the scanning speed. Three-dimensional (3D) thread form bending can be achieved by planning the optimal route, scanning parameters, and the number of laser scans. In contrast to the desired thread diameter of 20 mm and thread pitch of 180 mm, the resulting thread of the stainless steel tube is close to the target shape with errors of 3% for thread diameter and 2.5% for thread pitch, which are both in an acceptable range and thus verify the validity of the parameters selection and route planning method.
Cao Aiping,Gao Ling,Wang Fei,Tong Xuechen,Xie Shuangquan,Chen Xifeng,Lu Tianxin,Shen Haitao,Liu Hailiang,Jin Xiang,Li Hongbin 한국유전학회 2022 Genes & Genomics Vol.44 No.7
Background: Mitogen-activated protein kinases (MPKs) play important role in response to environmental stress as crucial signal receptors or sensors. Our previous study indicated that salt stress acts as a positive factor to stimulate the production of pharmacodynamic metabolites in the medicinal plant Glycyrrhiza uralensis. Currently, little is known about the MPK gene family and their functions in the medicinal plant G. uralensis. Objective: Identification, comprehensive bioinformatic analysis, expression profiling, and response pattern under salt stress of the G. uralensis GuMPK gene family. Methods: Genome-wide investigation and expression profiling of the MPK gene family in G. uralensis, and their phylogenetic relationships, evolutionary characteristics, gene structure, motif distribution, promoter cis-acting element, and expression pattern under salt stress in two different salt-tolerant Glycyrrhiza species were performed. Results: A total of 20 G. uralensis GuMPK genes were identified and categorized into five groups, and had conserved gene structure and motif distribution. Expression profiling of GuMPK genes suggested their potentially diverse functions in plant growth and in response to phytohormones and environmental stress, particularly GuMPK1, 2, 5, and 10 as key components for G. uralensis in response to abiotic stress. Further expression analysis under NaCl treatment in two different salt-tolerant Glycyrrhiza species displayed the MPKs' different response patterns, emphasizing the role of MPK2, 5, 7, and 16 as potentially crucial genes for Glycyrrhiza to respond to salt stress. Conclusion: Our results provide a genome-wide identification and expression profiling of MPK gene family in G. uralensis, and establish the foundation for screening key responsive genes and understanding the potential function and regulatory mechanism of GuMPKs in salt responsiveness.
A feasible hydrogen evolution process of water electrolysis assisted by TiO2 nanotube photocatalysis
Hongbo He,Aiping Chen,Ming Chang,Lei Ma,Chunzhong Li 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.4
A feasible process called as the hydrogen evolution of water electrolysis assisted by photocatalysis (WEAP) was proposed and experimentally achieved. In comparison with traditional alkaline electrolytic cell for water electrolysis with Ni anode, H2-production rate increased by 118% and the applied direct voltage reduced by 14.5% in WEAP with photoactive Ni anode modified by TiO2 nanotubes.
Identification of a mimotope of an infectious bronchitis virus S1 protein
Jingming Zhou,Jianan Li,Yanghui Li,Hongliang Liu,Yanhua Qi,Aiping Wang 대한수의학회 2021 Journal of Veterinary Science Vol.22 No.4
The S1 protein of the infectious bronchitis virus (IBV) is a major structural protein that induces the production of the virus-neutralization antibodies. The monoclonal antibody against the IBV M41 S1 protein was used as a target for biopanning. After three rounds of biopanning, randomly selected phages bound to the monoclonal antibody. Sequence analysis showed that the dominant sequence was SFYDFEMQGFFI. Indirect competitive enzyme-linked immunosorbent assay showed that SFYDFEMQGFFI is a mimotope of the S1 protein that was predicted by PepSurf. The mimotope may provide information for further structural and functional analyses of the S1 protein.
Preparation and application of graphene oxide nanocomposites loaded with enzymes and liposomes
Yu Yifan,Wang Ruyuan,Li Meilin,Li Shanshan,Fan Aiping 한국탄소학회 2023 Carbon Letters Vol.33 No.4
The present studies explored the possibility of immobilizing phosphocholine (PC) liposomes on the surface of graphene oxide (GO) which was pre-adsorbed with two kinds of enzymes, horseradish peroxidase and glucose oxidase. The transmission electron microscope images showed that the PC liposomes adsorbed onto the GO surface kept integrity. By using 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS)-encapsulated liposomes, a one-step colorimetric assay for glucose was developed. In the presence of glucose, the GO nanocomposites catalyzed the cascade enzymatic reaction producing colorimetric signals directly. Under the optimal conditions, the GO nanocomposites produced linearly increased colorimetric signal with increased concentrations of glucose ranging from 50 to 500 µM. The detection limit was 33 µM. The GO nanocomposites also exhibited good selectivity for the detection of glucose and were able to detect glucose in human serum.