• 文献标题:   Aggregation Reduction of Atomic Force Microscopy Sample Preparation of Reduced Graphene Oxide Nanosheets
  • 文献类型:   Article
  • 作  者:   ZHANG TY, ZHANG D
  • 作者关键词:   atomic force microscopy, reduced graphene oxide, aggregation
  • 出版物名称:   JOURNAL OF NANOSCIENCE NANOTECHNOLOGY
  • ISSN:   1533-4880 EI 1533-4899
  • 通讯作者地址:   Tongji Univ
  • 被引频次:   0
  • DOI:   10.1166/jnn.2010.2435
  • 出版年:   2010

▎ 摘  要

Aggregation, occurring in the preparation of atomic force microscopy samples, usually results in difficulties for morphologic observation and nanosheet-thickness analyses of the reduced graphene oxide nanosheets prepared by chemical reduction of exfoliated graphite oxide. In this paper, a simple method, primarily based on nitrogen-blow, was proposed for reducing the degree of aggregation occurring in atomic force microscopy sample preparation. The aggregation degree was characterized by the ratio of the region covered by overlapping nanosheets to that by single-layer nanosheets. Atomic force microscopy imaging results showed that the aggregation degree (20.5%) of the sample prepared by our proposed method was obviously lower than that (90.7%) by air-dry method. The possible mechanism analyses indicated that this obvious change may be attributed to the elimination of droplet-evaporation step entailed in air-dry method from our proposed method.