物理化学学报 >> 2016, Vol. 32 >> Issue (4): 1036-1042.doi: 10.3866/PKU.WHXB201601294

论文 上一篇    

覆银聚酰亚胺纳米棒阵列的制备及其SERS特性

范祥祥,何秀丽*(),李建平,高晓光,贾建,祁志美   

  • 收稿日期:2015-12-11 发布日期:2016-04-07
  • 通讯作者: 何秀丽 E-mail:hxl@mail.ie.ac.cn
  • 基金资助:
    国家自然科学基金(61271148)

Fabrication and Surface-Enhanced Raman Scattering Properties of an Ag-Coated Polyimide Nanorod Array

Xiang-Xiang FAN,Xiu-Li HE*(),Jian-Ping LI,Xiao-Guang GAO,Jian JIA,Zhi-Mei QI   

  • Received:2015-12-11 Published:2016-04-07
  • Contact: Xiu-Li HE E-mail:hxl@mail.ie.ac.cn
  • Supported by:
    the National Natural Science Foundation of China(61271148)

摘要:

通过在聚酰亚胺(PI)膜表面进行氧等离子体刻蚀得到纳米棒阵列,并溅射Ag膜形成了覆银聚酰亚胺纳米棒阵列。利用该方法能够简单快捷地制备出具有较强活性且结构可调的表面增强拉曼散射(SERS)衬底。通过改变氧等离子体刻蚀时间和溅射Ag膜厚度可以调节覆银PI纳米棒的间隙、密度和直径。通过对探针分子尼罗兰(NB)测试表征了覆银PI纳米棒衬底的SERS增强能力。通过改变氧等离子体刻蚀时间和Ag膜溅射厚度实现了衬底SERS增强能力的调节。在氧等离子体刻蚀时间为30 s和溅射Ag膜厚度为70 nm时,衬底的SERS增强能力达到最强,并且其拉曼信号展现出较好的一致性。

关键词: 纳米棒阵列, 表面增强拉曼散射, 等离子体刻蚀, 场增强因子

Abstract:

An Ag-coated polyimide (PI) nanorod array was prepared by sputtering Ag film on a PI nanorod array fabricated using oxygen plasma etching. The method is a facile way to fabricate a surface-enhanced Raman scattering (SERS) substrate with high sensitivity and a tunable structure. The diameter and density of the Agcoated nanorods and the gap between them could be tuned by changing the oxygen plasma etching time and Ag film thickness. Nile Blue (NB) was used as a probe molecule to investigate the SERS enhancement of this Ag nanostructure. The SERS peak intensity varied with the plasma etching time and Ag film thickness. The largest sensitivity was obtained with 30 s of oxygen plasma etching and 70 nm of sputtering Ag film. The SERS substrate also exhibited excellent signal reproducibility.

Key words: Nanorod array, Surface-enhanced Raman scattering, Plasma etching, Field-enhancement factor

MSC2000: 

  • O647