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首页> 外文期刊>IEEE transactions on nanotechnology >Silicon Nanowire Bridge Arrays With Dramatically Improved Yields Enabled by Gold Colloids Functionalized With HF Acid and Poly-L-Lysine
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Silicon Nanowire Bridge Arrays With Dramatically Improved Yields Enabled by Gold Colloids Functionalized With HF Acid and Poly-L-Lysine

机译：硅纳米线桥阵列，其具有由HF酸和聚L-赖氨酸官能化的金胶体，可显着提高产量

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摘要

Nanowire bridges are attractive structures for characterizing nanowires without impairment during the postprocessing steps and fabricating high-performance sensors. In this study, arrays of silicon nanowire bridges were reproducibly fabricated using chemical vapor deposition in the confined regions of patterned silicon electrodes. While depositing gold colloids without additives resulted in a negligible number of nanowire bridges, treating the colloids with HF acid or functionalizing the silicon electrode surfaces with poly-L-lysine increased the yields to nearly 97%. This dramatic improvement in yield was a result of increased adsorption of Au nanoparticles to the electrode surface. We show that diluted colloids along with the electrode surface treatment increase the possibility of occurrence of bridges with fewer nanowires. Micrographs and current-voltage measurements showed robust electrical, mechanical and metallurgical connections of nanowire bridges to the electrodes during the growth process.
机译：纳米线电桥是吸引人的结构，可在后处理步骤中表征纳米线而无损，并制造高性能传感器。在这项研究中，使用化学气相沉积法在图案化硅电极的受限区域中可复制地制造了硅纳米线桥阵列。在不添加添加剂的情况下沉积金胶体导致纳米线桥的数量可忽略不计，用HF酸处理胶体或用聚L-赖氨酸功能化硅电极表面可使产率提高到近97％。产量的显着提高是Au纳米颗粒吸附到电极表面的结果增加。我们表明，稀释的胶体与电极表面处理一起增加了用较少的纳米线发生电桥的可能性。显微照片和电流电压测量结果表明，在生长过程中，纳米线电桥与电极之间的牢固的电气，机械和冶金连接。

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