Interaction of plasma-generated water cluster ions with chemically-modified Si surfaces investigated by infrared absorption spectroscopy

Ayumi Hirano-Iwata, Ryosuke Matsumura, Teng Ma, Yasuo Kimura, Michio Niwano, Kazuo Nishikawa

Research output: Contribution to journalArticle

Abstract

We have investigated the interaction of water cluster ions generated by discharge plasma, with chemically modified Si surfaces using infrared absorption spectroscopy in the multiple internal reflection geometry. We observe that water cluster ions readily adsorb on SiO2-covered Si surfaces to form water droplets. We demonstrate that positively- and negatively-charged cluster ions adsorb on the SiO2-covered Si surface in different manners, indicating ionic interaction of the water droplets with the negatively-charged SiO2 surface. Water droplets formed on the protein-coated surface rupture the amide bond of the proteins, suggesting the function of protein decomposition of water cluster ions.

Original languageEnglish
Article number035017
JournalAIP Advances
Volume6
Issue number3
DOIs
Publication statusPublished - 2016 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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