Morphology-Driven Sensitivity Enhancement in Organic Nanowire Chemiresistors
Morphology-Driven Sensitivity Enhancement in Organic Nanowire Chemiresistors
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有机纳米线化学电阻器的形态驱动灵敏度增强
DOI：
10.1166/sl.2013.2917
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Dragoneas A
中科院分区：
文献类型：
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作者：
Dragoneas A
化学电阻器由常见的有机半导体，聚（3-己基噻吩）（P3HT）制备，已知其电导随大气湿度的增加而增加。对不同P3HT形态的化学电阻器进行了比较：溶液铸造薄膜与有机纳米线“网格”。结果表明，两种类型的化学电阻器在相对湿度低于50%时均无反应。当湿度超过这个阈值时，两个化学电阻器的电导都会增加。纳米线器件的电导响应远强于溶液浇铸薄膜。这种差异可以通过纳米线形态中更大的表面积来证明。我们得出结论，有机纳米线构成了有机传感器技术的有利形态，并推荐其在有机传感器应用中的更广泛应用。
Chemiresistors were prepared from the common organic semiconductor, poly(3-hexylthiophene) (P3HT), which is known to respond to atmospheric humidity with an increase of its conductance. Chemiresistors with different P3HT morphologies were compared: a solution-cast film versus an organic nanowire 'mesh.' It was found that both types of chemiresistors show no response for an exposure to less than 50% relative humidity. When humidity exceeds this threshold, the conductance of both chemiresistors increases. The conductance response of the nanowire device is far stronger as compared to that of the solution-cast film. This difference can be justified by the much larger surface area in the nanowire morphology. We conclude that organic nanowires constitute a favourable morphology for organic sensor technology, and recommend their wider employment in organic sensor applications.