Effect of Ligands on Thermal Dissipation from Gold Nanorods

被引：54

作者：

Alpert, Joshua ^{[1
]}

Hamad-Schifferli, Kimberly ^{[1
,2
]}

机构：

[1] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

[2] MIT, Dept Biol Engn, Cambridge, MA 02139 USA

来源：

LANGMUIR | 2010年 / 26卷 / 06期

基金：

美国国家科学基金会;

关键词：

METAL NANOPARTICLES; WATER; SIZE; CONDUCTANCE; ABSORPTION; DEPENDENCE; MONOLAYERS; STABILITY; RESONANCE; DYNAMICS;

D O I：

10.1021/la904855s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Thermal interface conductance was measured for Soluble gold nanorods (NRs) coated with mercaptocarboxylic acids (HS-(CH2)(n)COOH, n = 5,10,15), thiolated polyethylene glycols (MW = 356,1000,5000), and HS-(CH2)(15)-COOH-coated NRs further coated with alternating layers of poly(diallydimethylammonium chloride) and poly(sodium styrenesulfonate). Ferguson analysis determined ligand thickness. The thermal-diffusion-dominated regime of transient absorption spectra was fit to a continuum heat diffusion finite element model to obtain the thermal interface conductance, G, which varied with ligand chemistry but not molecule length. The results suggest that the ability to exclude water from the NR surface governs ligand G values.

引用

收藏

页码：3786 / 3789

页数：4

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