利用原子力显微镜对液体中的纳滤膜进行纳米表征和纳米制造。

Nanocharacterization and nanofabrication of a Nafion thin film in liquids by atomic force microscopy.

作者信息

Umemura Kazuo, Wang Tong, Hara Masahiko, Kuroda Reiko, Uchida On, Nagai Masayuki

机构信息

Research Center for Energy and Environment Science, Musashi Institute of Technology, 1-28-1 Tamazutsumi, Setagaya, Tokyo 158-8557, Japan.

出版信息

Langmuir. 2006 Mar 28;22(7):3306-12. doi: 10.1021/la051926t.

DOI:10.1021/la051926t

PMID:16548593

Abstract

We demonstrated the nanocharacterization and nanofabrication of a Nafion thin film using atomic force microscopy (AFM). AFM images showed that the Nafion molecules form nanoclusters in water, in 5% methanol, and in acetic acid. Young's modulus E of a Nafion film was estimated by sequential force curve measurements in water and in 5% methanol on one sample surface. Ewater/E5% methanol was 1.75 +/- 0.40, so the film was much softer in 5% methanol than in water. Even when solvent was replaced from 5% methanol to water, Young's modulus was not recovered soon. We showed the first example of the mechanical properties of a Nafion film on the nanoscale. Furthermore, we succeeded in fabricating 3D nanostructures on a Nafion surface by AFM nanolithography in liquids. Our results showed the new potential of the AFM nanolithography of a polymer film by softening the molecules in liquids.

摘要

我们利用原子力显微镜（AFM）展示了全氟磺酸薄膜的纳米表征和纳米制造。AFM图像显示，全氟磺酸分子在水、5%甲醇和乙酸中形成纳米团簇。通过在一个样品表面的水和5%甲醇中进行连续力曲线测量，估算了全氟磺酸薄膜的杨氏模量E。E水/E 5%甲醇为1.75±0.40，因此该薄膜在5%甲醇中比在水中软得多。即使将溶剂从5%甲醇换成水，杨氏模量也不会很快恢复。我们展示了纳米尺度下全氟磺酸薄膜力学性能的首个实例。此外，我们通过液体中的AFM纳米光刻技术成功地在全氟磺酸表面制造了三维纳米结构。我们的结果通过使液体中的分子软化，展示了聚合物薄膜AFM纳米光刻技术的新潜力。