毛秉伟
主要研究工作有:现场扫描微探针技术及其在成像、表面纳米构筑和纳米电子学研究中的应用,扫描隧道显微镜与扫描电化学显微镜联用,金属电沉积(包括离子液体中的电沉积), 微/纳电极研制及其在电化学、纳电子学和扫描探针联用技术中的应用。
个性化签名
- 姓名:毛秉伟
- 目前身份:
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学术头衔:
博士生导师
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学科领域:
物理化学
- 研究兴趣:主要研究工作有:现场扫描微探针技术及其在成像、表面纳米构筑和纳米电子学研究中的应用,扫描隧道显微镜与扫描电化学显微镜联用,金属电沉积(包括离子液体中的电沉积), 微/纳电极研制及其在电化学、纳电子学和扫描探针联用技术中的应用。
毛秉伟,1959年10月生,1982 年7月毕业于复旦大学化学系,1983年月11月公派赴英国南安普敦大学化学系攻博,从事电化学谱学新技术研究,1987年9月获博士学位后回国。先后在复旦大学和厦门大学化学系博士后流动站工作,1992年始进入厦门大学固体表面物理化学国家重点实验室,1996年晋升为教授,2002年9月被评为博士导师。 曾于1997年赴德国Ulm大学化学系开展短期合作研究。
先后主持了多项国家自然科学基金、教育部优秀年轻教师基金、博士点基金等;作为子课题负责人参加并完成九五基金重点项目"新型纳米结构电极体系的界面结构和性能",作为主要合作者参加973、863项目和国家基金委首批"化学创新研究群体"项目。
主要研究工作有:现场扫描微探针技术及其在成像、表面纳米构筑和纳米电子学研究中的应用,扫描隧道显微镜与扫描电化学显微镜联用,金属电沉积(包括离子液体中的电沉积), 微/纳电极研制及其在电化学、纳电子学和扫描探针联用技术中的应用。已在国内外学术期刊上发表论文100余篇。
任《科学通报》编委, 《电化学》编委,《扫描电子显微学》编委,《Journal of Experimental Science》编委,全国STM专业委员会委员。主持举办了全国第六届扫描隧道镜学术会议和第二届国际电化学春季会议。
作为主要参加者参与建立国内首台电化学现场扫描隧道显微镜;运用现场扫描探针显微镜开展界面电化学研究,包括电沉积、表面自组装、金属、半导体和导电高聚物在表面的纳米构筑、单分子电导的测量;开展扫描隧道显微术与扫描电化学显微术的联用和激光拉曼光谱的现场联用,用以研究更为广泛、丰富的电化学体系和问题;纳米尺度的微电极、微探针的研制,并应用于纳米电化学、扫描微探针显微学和纳电子学研究中;离子液体中的电化学。
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245
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成果数
5
毛秉伟, Juan Xiang, Bo Liu, Sun-Tao Wu, Bin Ren, Fang-Zu Yang, Bing-Wei Mao, Yuan L. Chow, and Zhong-Qun Tian*
Angew. Chem. 2005, 117, 1291-1294,-0001,():
-1年11月30日
The electrode pair and nanogap fabrication: The pair of facing Au (99.99%) electrodes were fabricated by an optical-lithography technique on an n-type Si wafer of <111> orientation that was covered with 2-mm, thermally oxidized silicon layer. The initial separation was typically 2mm. The electrochemical fabrication of the nanogap electrodes was realized by using a CHI631A electrochemical workstation (CHI Co., USA). The deposition current in chronopotentiometry was 0.1mAcm 2. The electroplating solution was 15mm KAu(CN)2, with 0.3mm K3C6H5O7 and 0.3mm KH2PO4 as supporting electrolytes. These optimized experimental parameters, especially the current density, ensure that the Au deposits in a uniform and compact manner, which ensures a reasonably good stability of the fabricated nanogap in both solution and air. When the electroplating solution was diluted by a factor of 100, that is, the electroplating solution was 0.15mm KAu(CN)2 with 3mm K3C6H5O7 and 3mm KH2PO4, the largest fabricated gap width was about 10nm. All solutions were prepared with analytical grade reagents and Milli-Q water. The nanogap electrodes with a gap larger than 1nm were characterized with a LEO1530 scanning electron microscope (LEO Co., Germany). The nanogap electrodes with gaps smaller than 1nm were characterized with a Keithley 4200 semiconductor characterization system to measure the corresponding I-V curve of the gap.
electrochemistry • electrodes • gold • nanostructures •nanotechnology
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毛秉伟, Xiao-Mi Xu a, Hui-Ping Zhong a, Hai-Ming Zhang a, Yi-Rong Mo b, Zhao-Xiong Xie a, La-Sheng Long a, Lan-Sun Zheng a, Bing-Wei Mao a, *
Chemical Physics Letters 386(2004)254-258,-0001,():
-1年11月30日
Silver adlayer can be formed on Au single crystal surfaces by surface-induced dissociation of Ag coordinated complex precursor [(dptap-Ag)2](NO3)2, where dptap denotes 2-(2-pyridylimino)-2H-1,2,4-thia-diazolo [2,3-a] pyridine, by immersing in the acetonitrile containing such a complex. STM study shows (4×4) and (√2×√p2) adlayer structures on Au(1 1 1) and Au(1 0 0), respectively, resembling the Ag UPD adlayer structures on the corresponding Au single crystal electrodes at high underpotential shifts. The formation of the Ag adlayer is confirmed by XPS study, and computational calculations suggest a mechanism of surfaceinduced weakening and dissociation of the (electrostatic) Ag-N bond by charge transfer from the Au surface.
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毛秉伟, L.G. Lin, Y. Wang, J.W. Yan, Y.Z. Yuan, J. Xiang, B.W. Mao *
Electrochemistry Communications 5(2003)995-999,-0001,():
-1年11月30日
We report an in situ STM study of a potential-dependent long-range surface restructuring of Au(1 1 1) electrode in neat 1-butyl-3-methylimidazolium tetrafluoroborates (BMIBF4) ionic liquid. Au(1 1 1) undergoes a significant long-range surface restructuring upon cathodic excursion to 1.0V vs. Pt quasi-reference. The restructuring involves the formation of tiny pits, which then develops into a stable worm-like network with an average width of the network grids ~2nm. Electrochemical annealing occurs at the cathodic limit with the presence of a reduction product of cation BMIþ. A smooth surface is recovered with the appearance of the typical (√3×22) reconstruction of Au(1 1 1). The surface restructuring is reestablished upon anodic excursion to 1.3V after the adsorbed reduction product is oxidized. The long-range surface restructuring phenomenon is tentatively explained as a result of partial charge transfer to the weakly adsorbed BMIþ, which reduces the metal-metal cohesive energy. In addition, the synergetic effect of the counter anion BF-4 may also be involved. The results provide a knowledge of Au(1 1 1) electrode behavior in the neat ionic liquid and are beneficial to understanding in situ STM results involving surface morphological changes in such a media.
Ionic liquid, In situ STM, Surface restructuring, Electrochemical annealing, Au(, 1 1 1),
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【期刊论文】Formation and STM tip-induced reduction of ultra thin SnO film on Au (111)
毛秉伟, J.W. Yan a, Z.X. Xie b, Z.X. Cao b, C.J. Zhou c, J.Y. Kang c, B.W. Mao b, *
Chemical Physics Letters 373(2003)575-579,-0001,():
-1年11月30日
This Letter presents a study on the oxidation of electrochemically deposited Sn monolayer on Au(1 1 1) surface and STM tip-induced reduction of as-prepared ultra thin SnO film. A threshold bias of 0.6 V (tip negative) at a low tunneling current of ~50 pA is required to image the as-formed SnO thin film by STM, typical of a semiconductor characteristic. Increasing the tunneling current to ~2 nA leads to the reduction of the SnO back to Sn. Based on the energy level calculation for the SnO, a mechanism involving direct electron tunneling is proposed to account for the tipinduced reduction.
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毛秉伟, B.W. Mao, B. Ren, X.W. Cai, L.H. Xiong
B.W. Mao et al./Journal of Electroandlytical Chemistry 394(1995)155-160,-0001,():
-1年11月30日
Diffusion coupled oscillatory behavior of the Au IHCI system was investigated in the presence of substrate "feedback" of the scanning electrochemical microscopic (SECM) system. It is shown that the amplitude of current oscillation can be increased significantly with a slight decrease in the oscillation frequency when the Pt substrate is positioned close to the small Au oscillating electrode. Such a "feedback" effect of the substrate may also become the driving force to induce current oscillation at the potential where normally electrodissolution occurs. The use of SECM to distinguish the types of oscillation mechanism of chosen systems is demonstrated by further fulfillment of a similar experiment on the surface process controlled potential oscillation system of Pt IHCHO. For this purpose, a special home-made galvanostat-potentiostat was employed which is generally necessary for studies of surface process controlled oscillation and may also be useful for studies of diffusion coupled oscillation under current control. It is shown that such an investigation under SECM configuration may provide insight into the oscillatory behavior from a new point of view.
Oscillatory behavior, Scanning electrochemical microscopy
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