Evaporation-Induced Crumpling of Graphene Oxide Nanosheets in Aerosolized Droplets: Confinement Force Relationship

被引：107

作者：

Wang, Wei-Ning ^{[1
]}

Jiang, Yi ^{[1
]}

Biswas, Pratim ^{[1
]}

机构：

[1] Washington Univ, Dept Energy Environm & Chem Engn, Aerosol & Air Qual Res Lab, St Louis, MO 63130 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2012年 / 3卷 / 21期

基金：

美国国家科学基金会;

关键词：

NANOPARTICLES;

D O I：

10.1021/jz3015869

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：

A possible solution to solve the restacking issue of graphene oxide (GO) nanosheets during large-scale production is to turn the two-dimensional (2D) nanosheets into three-dimensional (3D) crumpled balls that have excellent compressive properties but still maintain high free volumes. An aerosol-based process has been proven to be a rational method for this purpose, in which, the crumpling phenomenon, however, has hitherto remained anclear. Here we present a detailed understanding of the crumpling of GO nanosheet by a systematic investigation conducted in aerosolized droplets by means of in-line (e.g., scanning mobility particle sizer) and off-line (e.g., electron microscopy) measurements. Correlations between the confinement force and various parameters, such as evaporation rate and precursor concentration were established to derive a universally applicable equation. Both calculation and experimental results revealed that the evaporation rate plays an important role in controlling the crumpling process.

引用

页码：3228 / 3233

页数：6

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