Direct Organization of Morphology-Controllable Mesoporous SnO2 Using Amphiphilic Graft Copolymer for Gas-Sensing Applications
| Autor: | Alex Zettl, Carlo Carraro, Hu Long, Jong Hak Kim, Won Seok Chi, Chang Soo Lee, Roya Maboudian, Myoung Hwan Oh |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Microheater
Materials science 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Methacrylate 01 natural sciences 0104 chemical sciences Mesoporous organosilica Chemical engineering Amphiphile Polymer chemistry Copolymer General Materials Science 0210 nano-technology Mesoporous material Porosity Sol-gel |
| Zdroj: | ACS Applied Materials & Interfaces. 9:37246-37253 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.7b07823 |
| Popis: | 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 SnO2. The graft copolymer self-assembly is shown to enable good control over the morphology of the resulting SnO2 layer. Using this approach, mesoporous SnO2 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 SnO2 porosity, with the highly mesoporous SnO2 sensor exhibiting high sensitivity, low detection limit, and fast... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|