Micropatterning of Silica Nanoparticles by Electrospray Deposition through a Stencil Mask

Kazuhiko Higashi, Kazuhiro Uchida, Atsushi Hotta, Koichi Hishida, Norihisa Miki

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

This article describes the local deposition, or micropatterning, of silica nanoparticles (NPs) using an electrospray method with a stencil mask. The proposed technique can be carried out in a single step at room temperature and atmospheric pressure under dry conditions, allowing it to be used with water- or vacuum-sensitive materials, and leading to cost reductions and high throughput. An evaluation of the patterning accuracy using a 20 μm thick mask showed that for patterns with line widths greater than 50 μm, the pattern was reproduced with an accuracy greater than 95%. When silver NPs were preferably deposited on the silica NPs using a modified silver mirror reaction, they were found to exhibit strong surface-enhanced Raman scattering effects. The proposed process is readily applicable to the development of high-performance micro total analysis systems.

Original languageEnglish
Pages (from-to)75-81
Number of pages7
JournalJournal of Laboratory Automation
Volume19
Issue number1
DOIs
Publication statusPublished - 2014 Feb 1

Keywords

  • electrospray
  • patterning
  • shadow mask
  • silica nanoparticles
  • surface-enhanced Raman

ASJC Scopus subject areas

  • Computer Science Applications
  • Medical Laboratory Technology

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