期刊
LANGMUIR
卷 30, 期 34, 页码 10256-10262出版社
AMER CHEMICAL SOC
DOI: 10.1021/la502915r
关键词
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资金
- Agency for Defense Development through the Chemical and Biological Defense Research Center
Mesoporous silica with mean pore size of similar to 14 nm was coated by polydimethylsiloxane (PDMS) using a thermal deposition method. We showed that the inner walls of pores larger than similar to 8 nm can be coated by thin layers of PDMS, and the surfaces consisting of PDMS-coated silica were superhydrophobic, with water contact angles close to 170 degrees. We used the PDMS-coated silica as adsorbents of various gas-phase chemical warfare agent (CWA) simulants. PDMS-coated silica allowed molecular desorption of various CWA simulants even after exposure under highly humid conditions and, therefore, is applicable as an agent for the preconcentration of gas-phase analytes to enhance the sensitivities of various sensors.
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