High throughput micropatterning of optical oxygen sensor for single cell analysis

Haixin Zhu, Yanqing Tian, Shivani Bhushan, Fengyu Su, Deirdre Meldrum

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

In this paper, we present our results from process development and characterization of optical oxygen sensors that are patterned by traditional UV lithography. An oxygen sensitive luminescent probe, platinum octaethylporphyrin, was encapsulated in commercially purchased photoresist (AZ5214) to form uniform thin sensor films on fused silica substrates. Plasticizer ethoxylated trimethylolpropane triacrylate (SR454) was added to the dye-photoresist sensor mixtures to improve the oxygen sensitivity. The optimum sensor mixture composition that can be patterned with maximum sensitivity was identified. The microfabrication process conditions, cell adherence and oxygen sensitivity results from patterned structures were characterized in detail. Down to 3 μm features have been fabricated on fused silica substrates using the developed techniques. The result implies that the developed methods can provide a feasible way to miniaturize the optical sensor system for single cell analysis with precise control of sensor volume and response.

Original languageEnglish (US)
Article number6086560
Pages (from-to)1668-1672
Number of pages5
JournalIEEE Sensors Journal
Volume12
Issue number6
DOIs
StatePublished - 2012

Keywords

  • Dissolved oxygen sensing
  • extracellular sensing
  • microfabrication
  • optical chemical sensor
  • single cell analysis

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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