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有序金纳米颗粒阵列的制备及其吸光特性

Preparation and Absorption Characteristics of Highly Ordered Au Nanoparticle Array

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摘要

采用多孔氧化铝(AAO)模板作为基底,结合真空蒸镀、热去湿技术实现金纳米颗粒的有序组装。通过二次氧化技术制得孔径80 nm、壁厚20 nm左右的多孔氧化铝模板,在模板表面真空蒸镀一层很薄的金膜,随后将样品放入管式炉中做退火处理。在扫描电子显微镜下对其形貌进行表征,发现多孔氧化铝模板表面金纳米颗粒具有很好的有序度;同时对于具有较浅孔的模板,有序孔阵列组装得到的金纳米颗粒阵列呈现高度有序性,且与孔阵列密排六方结构相匹配。采用紫外可见光分光光度计在300~800 nm波长范围内对表面成功组装金纳米颗粒阵列的样品吸收特性进行了测量,结果表明多孔氧化铝模板组装金纳米颗粒阵列后吸收谱图出现明显的表面等离子体吸收峰,峰位置在316 nm和616 nm处,较普通金纳米颗粒吸收峰位置出现大幅度的红移。

Abstract

Using the porous anodic alumina oxide (AAO) as substrate, highly ordered Au nanoparticle array on the surface of AAO are prepared by vacuum deposition and subsequent thermal dewetting. We demonstrate a porous AAO with diameter 80 nm and wall thickness 20 nm, then a gold thin films is deposited on the surface of AAO template. Then thermal annealing for the dewetting process is carried out in the tube furnace. Subsequently, the scanning electron microscope (SEM) images of AAO show that the surface of AAO is with highly ordered Au nanoparticles. For suitable conditions, another highly ordered Au nanoparticles array appears at the shallow hole regions and matches with the hole array, and there are six nanoparticles around each hole which is in highly ordered. The absorption characteristies of successfully assembled Au nanoparticle array sample are measured in the wavelength range of 300~800 nm using the UV-vis spectrophotometer, and obvious absorption peaks are observed at 316 nm and 616 nm after the Au nanoparticles are assembed on the AAO. Compared to the absorption peaks of ordinary Au nanoparticles, there is dramatic redshift.

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中图分类号:O756

DOI:10.3788/aos201333.s216002

所属栏目:材料

责任编辑:韩峰  信息反馈

基金项目:国家自然科学基金项目(11104347)、校预研项目(JC13-02-14)

收稿日期:2013-08-01

修改稿日期:2013-09-01

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作者单位    点击查看

王飞:中南大学物理与电子学院, 湖南 长沙 410073国防科学技术大学理学院, 湖南 长沙 410073
王迎威:中南大学物理与电子学院, 湖南 长沙 410073
符力平:中南大学物理与电子学院, 湖南 长沙 410073
方靖岳:国防科学技术大学理学院, 湖南 长沙 410073
王广:国防科学技术大学理学院, 湖南 长沙 410073
常胜利:国防科学技术大学理学院, 湖南 长沙 410073
张学骜:国防科学技术大学理学院, 湖南 长沙 410073

联系人作者:王飞(wangfei_815@163.com)

备注:王飞(1981—),男,博士,讲师,主要从事纳米材料方面的研究。

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引用该论文

Wang Fei,Wang Yingwei,Fu Liping,Fang Jingyue,Wang Guang,Chang Shengli,Zhang Xueao. Preparation and Absorption Characteristics of Highly Ordered Au Nanoparticle Array[J]. Acta Optica Sinica, 2013, 33(s2): s216002

王飞,王迎威,符力平,方靖岳,王广,常胜利,张学骜. 有序金纳米颗粒阵列的制备及其吸光特性[J]. 光学学报, 2013, 33(s2): s216002

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