Direct Organization of Morphology-Controllable Mesoporous SnO 2 Using Amphiphilic Graft Copolymer for Gas-Sensing Applications

Won Seok Chi, Chang Soo Lee, Hu Long, Myoung Hwan Oh, Alex Zettl, Carlo Carraro, Jong Hak Kim, Roya Maboudian

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A simple and flexible strategy for controlled synthesis of mesoporous metal oxide films using an amphiphilic graft copolymer as sacrificial template is presented and the effectiveness of this approach for gas-sensing applications is reported. The amphiphilic graft copolymer poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) is used as a sacrificial template for the direct synthesis of mesoporous SnO 2 . The graft copolymer self-assembly is shown to enable good control over the morphology of the resulting SnO 2 layer. Using this approach, mesoporous SnO 2 based sensors with varied porosity are fabricated in situ on a microheater platform. This method reduces the interfacial contact resistance between the chemically sensitive materials and the microheater, while a simple fabrication process is provided. The sensors show significantly different gas-sensing performances depending on the SnO 2 porosity, with the highly mesoporous SnO 2 sensor exhibiting high sensitivity, low detection limit, and fast response and recovery toward hydrogen gas. This printable solution-based method can be used reproducibly to fabricate a variety of mesoporous metal oxide layers with tunable morphologies on various substrates for high-performance applications.

Original languageEnglish
Pages (from-to)37246-37253
Number of pages8
JournalACS Applied Materials and Interfaces
Volume9
Issue number42
DOIs
Publication statusPublished - 2017 Oct 25

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Graft copolymers
Gases
Sensors
Porosity
Metals
Contact resistance
Self assembly
Oxides
Oxide films
Hydrogen
Fabrication
Recovery
Substrates

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Chi, Won Seok ; Lee, Chang Soo ; Long, Hu ; Oh, Myoung Hwan ; Zettl, Alex ; Carraro, Carlo ; Kim, Jong Hak ; Maboudian, Roya. / Direct Organization of Morphology-Controllable Mesoporous SnO 2 Using Amphiphilic Graft Copolymer for Gas-Sensing Applications In: ACS Applied Materials and Interfaces. 2017 ; Vol. 9, No. 42. pp. 37246-37253.
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Direct Organization of Morphology-Controllable Mesoporous SnO 2 Using Amphiphilic Graft Copolymer for Gas-Sensing Applications . / Chi, Won Seok; Lee, Chang Soo; Long, Hu; Oh, Myoung Hwan; Zettl, Alex; Carraro, Carlo; Kim, Jong Hak; Maboudian, Roya.

In: ACS Applied Materials and Interfaces, Vol. 9, No. 42, 25.10.2017, p. 37246-37253.

Research output: Contribution to journalArticle

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