Interparticle spacing control in the superlattices of carboxylic acid-capped gold nanoparticles by hydrogen-bonding mediation

被引：55

作者：

Yao, H ^{[1
]}

Kojima, H ^{[1
]}

Sato, S ^{[1
]}

Kimura, K ^{[1
]}

机构：

[1] Univ Hyogo, Grad Sch Mat Sci, Kamigori Cho, Hyogo 6781297, Japan

来源：

LANGMUIR | 2004年 / 20卷 / 23期

关键词：

D O I：

10.1021/la0481501

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have demonstrated that carboxylic acid-capped gold nanoparticles were self-assembled to form two-dimensional (2D) and/or three-dimensional (3D) superlattices at an air/water interface in the presence of a bifunctional hydrogen-bonding mediator such as 4-pyridinecarboxylic acid (PyC) or trans-3-(3-pyridyl)acrylic acid (PyA). Transmission electron microscopy revealed a hexagonal close-packed arrangement of nanoparticles in the superlattice with an extension of interparticle spacing. In the 2D superlattices, larger particles produced a higher-quality assembly having long-range translational ordering. Attenuated total reflectance IR (ATR-IR) spectroscopy revealed the presence of hydrogen bonds between the mediator used and the capping agents of carboxylic acid on nanoparticle surfaces. Since the experimentally obtained interparticle separation distance agreed approximately with that obtained by the geometrical model calculations, we conclude that the hydrogen-bonding mediation controlled the interparticle spacing or structure by monomolecular incorporation between adjacent nanoparticles in the superlattices.

引用

页码：10317 / 10323

页数：7

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