Morphological evolution of single-crystal Ag nanospheres during the galvanic replacement reaction with HAuCl4

被引：93

作者：

Kim, Mun Ho ^{[1
]}

Lu, Xianmao ^{[1
]}

Wiley, Benjamin ^{[2
]}

Lee, Eric P. ^{[1
]}

Xia, Younan ^{[1
]}

机构：

[1] Washington Univ, Dept Biomed Engn, St Louis, MO 63130 USA

[2] Univ Washington, Dept Chem Engn, Seattle, WA 98195 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 21期

关键词：

D O I：

10.1021/jp711662f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This paper presents a systematic study of the galvanic replacement reaction between 23.5 nm single-crystal Ag nanospheres and HAuCl4 in an aqueous medium. We have monitored both morphological and spectral changes as the molar ratio of HAuCl4 to Ag is increased. The replacement reaction on single-crystal Ag nanospheres results in the formation of a series of hollow and porous nanostructures composed of Au-Ag alloys. By varying the molar ratio of HAuCl4 to Ag, we are able to control the size and density of the pores. In addition, the localized surface plasmon resonance peaks of these nanostructures can be readily tuned from 408 to 791 nm as the product becomes increasingly more hollow and porous.

引用

页码：7872 / 7876

页数：5

共 28 条

[1] Gold nanocages: Bioconjugation and their potential use as optical imaging contrast agents [J].

Chen, J ;

Saeki, F ;

Wiley, BJ ;

Cang, H ;

Cobb, MJ ;

Li, ZY ;

Au, L ;

Zhang, H ;

Kimmey, MB ;

Li, XD ;

Xia, YN .

NANO LETTERS, 2005, 5 (03) :473-477

[2] Facile synthesis of gold-silver nanocages with controllable pores on the surface [J].

Chen, Jingyi ;

McLellan, Joseph M. ;

Siekkinen, Andrew ;

Xiong, Yujie ;

Li, Zhi-Yuan ;

Xia, Younan .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (46) :14776-14777

[3] Gold nanocages: Engineering their structure for biomedical applications [J].

Chen, JY ;

Wiley, B ;

Li, ZY ;

Campbell, D ;

Saeki, F ;

Cang, H ;

Au, L ;

Lee, J ;

Li, XD ;

Xia, YN .

ADVANCED MATERIALS, 2005, 17 (18) :2255-2261

[4] Optical properties of Pd-Ag and Pt-Ag nanoboxes synthesized via galvanic replacement reactions [J].

Chen, JY ;

Wiley, B ;

McLellan, J ;

Xiong, YJ ;

Li, ZY ;

Xia, YN .

NANO LETTERS, 2005, 5 (10) :2058-2062

[5] Magnetoelectrochemistry of gold nanoparticle quantized capacitance charging [J].

Chen, SW ;

Yang, YY .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (19) :5280-5281

[6] Some interesting properties of metals confined in time and nanometer space of different shapes [J].

El-Sayed, MA .

ACCOUNTS OF CHEMICAL RESEARCH, 2001, 34 (04) :257-264

[7] Silver nanoshells: Variations in morphologies and optical properties [J].

Jackson, JB ;

Halas, NJ .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (14) :2743-2746

[8]

KREBIG U, 1995, OPTICAL PROPERTIES M

[9] Nanoshell-enabled photonics-based imaging and therapy of cancer [J].

Loo, C ;

Lin, A ;

Hirsch, L ;

Lee, MH ;

Barton, J ;

Halas, NJ ;

West, J ;

Drezek, R .

TECHNOLOGY IN CANCER RESEARCH & TREATMENT, 2004, 3 (01) :33-40

[10] Mechanistic studies on the galvanic replacement reaction between multiply twinned particles of Ag and HAuCl4 in an organic medium [J].

Lu, Xianmao ;

Tuan, Hsing-Yu ;

Chen, Jingyi ;

Li, Zhi-Yuan ;

Korgel, Brian A. ;

Xia, Younan .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (06) :1733-1742

← 1 2 3 →