金纳米粒子组装体的连续离散型纳米结构控制

doi:10.7503/cjcu20141092

高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (5): 844.doi: 10.7503/cjcu20141092

• 研究论文: 无机化学 • 上一篇下一篇

金纳米粒子组装体的连续离散型纳米结构控制

金萍¹, 代昭¹(), 郭文娟¹, 陈广平²

1. 天津工业大学环境与化学工程学院, 天津 300387
2. Department of Physiological Science,College of Veterinary Medicine, Oklahoma State University, Stillwater OK 74078, USA

收稿日期:2014-12-12 出版日期:2015-05-10 发布日期:2015-04-17
作者简介:联系人简介: 代昭, 男, 博士, 教授, 主要从事荧光生物传感方面的研究. E-mail: daizhao@gmail.com
基金资助:
国家自然科学基金(批准号: 21172171)和天津市自然科学基金(批准号: 12JCQNJC08600, 15JCYBJC20500)资助

Preparation of Gold Nanoparticles Assemblies with Controllable,Continuous and Discrete Nanostructures^†

JIN Ping¹, DAI Zhao^1,^*(), GUO Wenjuan¹, CHEN Guangping²

1. School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
2. Department of Physiological Sciences, College of Veterinary Medicine, Oklahoma State University, Stillwater OK 74078, USA

Received:2014-12-12 Online:2015-05-10 Published:2015-04-17
Contact: DAI Zhao E-mail:daizhao@gmail.com
Supported by:
† Supported by the National Natural Science Foundation of China(No.21172171) and the Natural Science Foundation of Tianjin, China(Nos.12JCQNJC08600, 15JCYBJC20500)

摘要/Abstract

摘要：

采用柠檬酸钠还原氯金酸的方法, 制备出粒径均一的金纳米粒子(AuNPs), 通过加入二水合双(对-磺酰苯基)苯基膦化二钾盐(BSPP), 增强了AuNPs体系的分散性与稳定性. 选用直径为15和40 nm的AuNPs, 用不同序列巯基修饰的单链DNA连接到其表面, 通过DNA链的杂交, 形成不同结构的金纳米粒子组装体. 通过改变加入DNA延长连接单元的比例, 可以控制金纳米粒子组装体具有连续离散型的1∶1, 2∶1和3∶1纳米结构.

关键词: 金纳米粒子, DNA连接体, 组装体, 纳米结构

Abstract:

Gold nanoparticles(AuNPs) with different sizes(15 and 40 nm) were prepared by reducing chlorauric acid with sodium citrate. The stability of AuNPs was increased when bis(p-sulfonatophenyl)phenylphosphine(BSPP) was used as ligand because of its large molecule size and electro-negativity in water. The assemblies of AuNPs were obtained when AuNPs with different particle sizes were conjugated with two thiol-terminated, single-stranded, and complementary DNA(HS-DNA), respectively, and hybridized each other. The results indicated that AuNPs assemblies could have controllable, continuous and discrete nanostructures with molar ratios of 1∶1, 2∶1 and 3∶1 in the presence of BSPP and with extended strands of DNA as linkers.

Key words: Au nanoparticle, DNA linker, Assembly, Nanostructure

中图分类号:

O614

TrendMD:

金萍, 代昭, 郭文娟, 陈广平. 金纳米粒子组装体的连续离散型纳米结构控制. 高等学校化学学报, 2015, 36(5): 844.

JIN Ping, DAI Zhao, GUO Wenjuan, CHEN Guangping. Preparation of Gold Nanoparticles Assemblies with Controllable,Continuous and Discrete Nanostructures^†. Chem. J. Chinese Universities, 2015, 36(5): 844.

图/表 7

Scheme 1 Preparation of AuNPs using citric acid trisodium or BSPP as ligand

Scheme 2 Preparation of AuNPs assemblies with BSPP and extended DNA linkers

Fig.1 Absorption spectra of Au15 nanoparticles(a0—a2) and Au15 nanoparticles with 50 mmol/L BSPP(b0—b2) dispersed in water with different NaCl concentrationsc(NaCl)/(mmol·L-1): a0, b0. 0; a1, b1. 50; a2, b2. 100.

Fig.2 TEM images of AuNPs with 50 mmol/L NaCl(A) and 50 mmol/L NaCl+50 mmol/L BSPP(B)

Fig.3 TEM images(A—C) and absorption spectra(D) of AuNPs assemblies with no BSPP and o extended-DNA linkern(Au15)∶n(Au40) of the mixture: (A), a. 1∶1; (B), b. 2∶1; (C), c. 3∶1.

Fig.4 TEM images(A—C) and absorption spectra(D) of AuNPs assemblies with BSPP but o extended-DNA linkern(Au15)∶n(Au40) of the mixture: (A), a. 1∶1; (B), b. 2∶1; (C), c. 3∶1.

Fig.5 TEM images(A—C) and absorption spectra(D) of AuNPs assemblies with BSPP and xtended-DNA linkern(Au15)∶n(Au40) of the mixture: (A), a. 1∶1; (B), b. 2∶1; (C), c. 3∶1.

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金纳米粒子组装体的连续离散型纳米结构控制

Preparation of Gold Nanoparticles Assemblies with Controllable,Continuous and Discrete Nanostructures^†

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金纳米粒子组装体的连续离散型纳米结构控制

Preparation of Gold Nanoparticles Assemblies with Controllable,Continuous and Discrete Nanostructures†

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Preparation of Gold Nanoparticles Assemblies with Controllable,Continuous and Discrete Nanostructures^†