高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (12): 2125-2131.doi: 10.7503/cjcu20160608

• 研究论文: 无机化学 • 上一篇    下一篇

抗坏血酸还原法制备金纳米花的机理

杨爽, 纪小会, 杨文胜()   

  1. 吉林大学化学学院, 表面与界面化学省重点实验室, 长春 130012
  • 收稿日期:2016-08-29 出版日期:2016-12-10 发布日期:2016-11-18
  • 作者简介:联系人简介: 杨文胜, 男, 博士, 教授, 博士生导师, 主要从事胶体与表面化学的研究. E-mail:wsyang@jlu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 51372097)资助

Mechanism in the Preparation of Gold Nanoflowers by Ascorbic Acid Reduction

YANG Shuang, JI Xiaohui, YANG Wensheng*()   

  1. Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2016-08-29 Online:2016-12-10 Published:2016-11-18
  • Contact: YANG Wensheng E-mail:wsyang@jlu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51372097)

摘要:

研究了以抗坏血酸和氯金酸为生长溶液制备金纳米花的反应机理. 结果表明, 通过改变生长溶液中抗坏血酸浓度可以调节小尺寸的初级金粒子在种子表面的聚集方式及金纳米花的熟化速度, 从而影响金纳米花的形貌和光学性质. 协同改变抗坏血酸浓度和pH值, 可实现对金纳米花形貌及光学性质的有效调控. 表面增强拉曼散射(SERS)性能评价结果表明, 抗坏血酸还原法制备的金纳米花表面较清洁, 对罗丹明6G有较好的拉曼增强效果.

关键词: 金纳米花, 抗坏血酸, 粒子内熟化, 聚集, 种子法

Abstract:

The mechanism in the preparation of gold nanoflowers using the mixture of HAuCl4 and ascorbic acid(AA) as growth solution was investigated. It was identified that the AA concentration affected the attachment of the small gold particles on the seeds and the intraparticle ripening of the gold nanoflowers, thus resulting in the formation of the flowers with different morphologies and optical properties. It is effective to tune morphology and optical property of the gold nanoflowers by optimizing the AA concentration and pH of the growth solution simultaneously. Surface enhanced Raman scattering(SERS) results indicated the as-prepared gold nanoflowers showed good SERS activity to Rhodamine 6G, suggesting the clean surface character of the flowers prepared by AA reduction.

Key words: Gold nanoflowers, Ascorbic acid, Intraparticle ripening, Aggregation, Seeding approach

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