Scanning Electrochemical Microscopy of One-Dimensional Nanostructure: Effects of Nanostructure Dimensions on the Tip Feedback Current under Unbiased Conditions.
Scanning Electrochemical Microscopy of One-Dimensional Nanostructure: Effects of Nanostructure Dimensions on the Tip Feedback Current under Unbiased Conditions.
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DOI：
10.1016/j.jelechem.2009.01.034
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发表时间：
2009-04-15
期刊：
影响因子：
--
通讯作者：
Amemiya S
中科院分区：
文献类型：
--
作者：
Xiong H;Kim J;Kim E;Amemiya S
扫描电化学显微镜（SECM）是一种在无偏见的条件下单个（1D）纳米结构的电化学表征的强大方法。位于位置的磁盘形的超大型电极尖端在无偏的纳米体上方，在绝缘底物上制备，对带的有限尺寸敏感，即从绝缘表面的电子转移速率，nanoband表面上的NANOBAND远离nanband iS nistirions and and and nistirions and and nisir的偏差，即微米的宽度，纳米宽度和纳米高度。尖端的内部和外部半径以及尖端 - 底层距离。通过电子束光刻在SiO2表面上使用的AU纳米机通过实验确认了理论预测，从而产生了宽度的100或500 nm的良好定义尺寸，高度为47 nm，高度可以通过secm-wide-tim-dimon-dimon-dimon-dimon-tim-dimon-dimon-dimon-dimon-dimon-dimon-imontiam comment-imont。 Ansfer动力学RU（NH3）63+在纳米表面。
Scanning electrochemical microscopy (SECM) is developed as a powerful approach to electrochemical characterization of individual one-dimensional (1D) nanostructures under unbiased conditions. 1D nanostructures comprise high-aspect-ratio materials with both nanoscale and macroscale dimensions such as nanowires, nanotubes, nanobelts, and nanobands. Finite element simulations demonstrate that the feedback current at a disk-shaped ultramicroelectrode tip positioned above an unbiased nanoband, as prepared on an insulating substrate, is sensitive to finite dimensions of the band, i.e., micrometer length, nanometer width, and nanometer height from the insulating surface. The electron-transfer rate of a redox mediator at the nanoband surface depends not only on the intrinsic rate but also on the open-circuit potential of the nanoband, which is determined by the dimensions of the nanoband as well as the tip inner and outer radii, and tip–substrate distance. The theoretical predictions are confirmed experimentally by employing Au nanobands as fabricated on a SiO2 surface by electron-beam lithography, thereby yielding well defined dimensions of 100 or 500 nm in width, 47 nm in height, and 50 μm in length. A 100 nm-wide nanoband can be detected by SECM imaging with ∼2 μm-diameter tips although the tip feedback current is compromised by finite electron-transfer kinetics for Ru(NH3)63+ at the nanoband surface.
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影响因子：
--
作者：
BARD, AJ;MIRKIN, MV;WIPF, DO
通讯作者：
WIPF, DO
DOI：
10.1002/bbpc.19850890212
发表时间：
1985-01-01
期刊：
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS
影响因子：
--
作者：
IWASITA, T;SCHMICKLER, W;SCHULTZE, JW
通讯作者：
SCHULTZE, JW
影响因子：
7.4
作者：
MIRKIN, MV;BARD, AJ
通讯作者：
BARD, AJ
影响因子：
3.9
作者：
MOFFAT, TP;YANG, HJ;BARD, AJ
通讯作者：
BARD, AJ
影响因子：
64.8
作者：
IIJIMA, S
通讯作者：
IIJIMA, S