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Fabrication of Highly Conductive Pd Nanowires using PDMS Transfer Method on DNA Scaffolds through Ethanol-Reduction
Hong-bing Cai,Zhen-xing Wang*,Jin-yang Liu,Kun Zhang,Xiao-ping Wang*
Author NameAffiliationE-mail
Hong-bing Cai Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei 230026, China  
Zhen-xing Wang* National Center for Nanoscience and Technology, Beijing 100190, China xpwang@ustc.edu.cn 
Jin-yang Liu Department of Physics, University of Science and Technology of China, Hefei 230026, China  
Kun Zhang Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei 230026, China  
Xiao-ping Wang* Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei 230026, ChinaDepartment of Physics, University of Science and Technology of China, Hefei 230026, China wangzx@nanoctr.cn 
Abstract:
We have developed a simple, productive, and effective poly(dimethysiloxane) (PDMS) trans-fer method to fabricate highly conductive Pd nanowires following DNA scaffolds on various substrates, based on ethanol-reduction at low temperature. Pd nanoparticles were selectively deposited and confined onto the DNA templates on a PDMS sheet to form Pd nanowires and then the nanowires were transferred to other various substrates with a low occurrence of par-asitic nanoparticles. The structure, morphology and the conductance of Pd nanowires were characterized with transmission electron microscopy, field emission scanning electron mi-croscopy, and electrical transport measurement, respectively. Moreover, the growth process of the Pd nanowires was investigated by varying the incubation time and reaction temper-ature. The present strategy provides a new method to fabricate extremely dense, highly conductive, and well aligned Pd nanowires on various substrates, which make it promising for building nanosensors and nanoelectronic devices.
Key words:  Pd nanowires, DNA template, Poly(dimethysiloxane) transfer, Ethanol reduc-tion
FundProject:
基于DNA模板与聚二甲基硅氧烷转移制备钯纳米线的新方法
蔡洪冰,王振兴*,刘金养,张琨,王晓平*
摘要:
在聚二甲基硅氧烷衬底上梳理得到DNA阵列,并以DNA为模板通过低温乙醇还原得到Pd纳米线,再通过PDMS转移技术将Pd纳米线转移至不同的衬底,这是一种制备高导电性Pd纳米线的新方法.以DNA为模板的选择性生长控制方法可以显著抑制衬底上无规Pd纳米颗粒的出现. SEM观测制备的Pd纳米线的宽度约为80 nm,连续长度可达14 μm. FESEM、XPS和TEM表征揭示出Pd纳米线是由面心立方结构的Pd纳米晶粒组成,电学测量获得的Pd纳米线的电阻率为1.59 μΩm,仅比体电阻率高约一个量级. 研究还发现通过改变反应时间和温度可以有效调控Pd纳米线的生长过程.
关键词:  Pd纳米线,DNA模板,PDMS转移,乙醇还原
DOI:10.1063/1674-0068/26/05/607-611
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