Sensing behaviors of polypyrrole nanotubes prepared in reverse microemulsions: Effects of transducer size and transduction mechanism

被引：101
作者：
Yoon, Hyeonseok [1 ]
Chang, Mincheol [1 ]
Jang, Jyongsik [1 ]
机构：
[1] Seoul Natl Univ, Coll Engn, Sch Chem Engn, Hyperstruct Organ Mat Res Ctr, Seoul 151742, South Korea
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2006年 / 110卷 / 29期
关键词：
D O I：
10.1021/jp061423b
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Polypyrrole (PPy) nanotubes with different diameters were readily fabricated using cylindrical micelle templates in sodium bis(2-ethylhexyl) sulfosuccinate (AOT) reverse microemulsions. Interestingly, Raman spectroscopy and ultraviolet (UV)-visible spectroscopy revealed that the PPy nanotubes with smaller diameters had a more extended conjugation length as well as a higher oxidation level. The PPy nanotubes were deposited onto a microelectrode array and were exposed to chemical vapor and electromagnetic radiation: typically, NH3 vapor and UV light were chosen. The electrical response of PPy nanotubes to two different kinds of analytes was strongly dependent on their diameters. Moreover, since the small dimensions of PPy nanotubes facilitated the interaction between nanotubes and analytes, the PPy nanotube sensors showed conspicuously enhanced responses compared with conventional PPy.
引用
收藏
页码：14074 / 14077
页数：4
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