Vertically aligned nanowires from boron-doped diamond.
Vertically aligned nanowires from boron-doped diamond.
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DOI：
10.1021/nl801136h
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发表时间：
2008-09
期刊：
影响因子：
10.8
通讯作者：
N. Yang;H. Uetsuka;E. Ōsawa;C. Nebel
中科院分区：
文献类型：
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作者：
N. Yang;H. Uetsuka;E. Ōsawa;C. Nebel
通过使用纳米金刚石颗粒作为硬掩模和通过使用反应离子蚀刻，制造具有受控几何特性如线之间的长度和距离的垂直对准的金刚石纳米线。利用原子力显微镜（AFM）、扫描隧道显微镜（STM）和电化学技术对金刚石纳米线的表面结构、电子性质和电化学功能化进行了表征。AFM和STM实验表明，刻蚀10 s后的金刚石纳米线具有长度为3-10 nm，间距为11 nm的线状结构。金刚石纳米线的电极活性面积提高了2倍。纳米线尖端与硝基苯基分子的功能化，其特征在于清洁和硝基苯基分子修饰的金刚石纳米线上的STM。尖端修饰的金刚石纳米线在生物传感器应用方面很有前途，其中需要受控的生物分子键合来显着提高化学稳定性和传感能力。
Vertically aligned diamond nanowires with controlled geometrical properties like length and distance between wires were fabricated by use of nanodiamond particles as a hard mask and by use of reactive ion etching. The surface structure, electronic properties, and electrochemical functionalization of diamond nanowires were characterized by atomic force microscopy (AFM) and scanning tunneling microscopy (STM) as well as electrochemical techniques. AFM and STM experiments show that diamond nanowire etched for 10 s have wire-typed structures with 3-10 nm in length and with typically 11 nm spacing in between. The electrode active area of diamond nanowires is enhanced by a factor of 2. The functionalization of nanowire tips with nitrophenyl molecules is characterized by STM on clean and on nitrophenyl molecule-modified diamond nanowires. Tip-modified diamond nanowires are promising with respect to biosensor applications where controlled biomolecule bonding is required to improve chemical stability and sensing significantly.