Relation between the Solution-State Behavior of Self-Assembled Monolayers on Nanoparticles and Dispersion of Nanoparticles in Organic Solvents

被引：21

作者：

Arita, Toshihiko ^{[1
]}

Yoo, Jungwoo ^{[1
]}

Adschiri, Tadafumi ^{[2
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

[2] Tohoku Univ, WPI Res Ctr, Adv Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 10期

关键词：

SURFACE INTERACTION FORCES; OXIDIZED ALUMINUM SURFACE; NORMAL-ALKANOIC ACIDS; MOLECULAR ASSEMBLIES; STRUCTURAL-CHARACTERIZATION; GOLD NANOPARTICLES; FT-IR; MICROSCOPY; DENSITY; CHAIN;

D O I：

10.1021/jp110172s

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：

The solution-state property of three-dimensional self-assembled monolayers (3D SAMs) on CeO(2) nanoparticles (NPs) has been found to seriously affect dispersion of the NPs. The chain length and solvent-dependent changes in the properties of SAMs were investigated by using various n-alkanoic acid SAMs on CeO(2) NPs and various nonpolar organic solvents. NMR and DSC were employed, to analyze solution-state behavior of 3D SAMs. A scaling approach on the chain length and grafting density of the SAMs could characterize the behavior of SAM in solution: whether the SAMs were swelling or not. The solvent quality (good or poor) for SAMs was also important for the swelling of the SAMs. In addition, the volume of the solvent molecule was also,a critical parameter. The swollen SAMs could provide effective repulsion to overcome van derWaals attraction between NPs. Combining our scaling analysis on solution-state behavior of the 3D SAMs and the experimental results of dispersion of the CeO(2) NPs, a criterion for the 3D SAMs to obtain well-dispersed surface-modified NPs was proposed.

引用

页码：3899 / 3909

页数：11

共 58 条

[1] SPONTANEOUSLY ORGANIZED MOLECULAR ASSEMBLIES .1. FORMATION, DYNAMICS, AND PHYSICAL-PROPERTIES OF NORMAL-ALKANOIC ACIDS ADSORBED FROM SOLUTION ON AN OXIDIZED ALUMINUM SURFACE [J].