Greenshields Márcia W C C, Hümmelgen Ivo A, Mamo Messai A, Shaikjee Ahmed, Mhlanga Sabelo D, van Otterlo Willem A L, Coville Neil J
Departamento de Física, Universidade Federal do Paraná, Caixa Postal 19044, 81531-990 Curitiba, Brazil.
J Nanosci Nanotechnol. 2011 Nov;11(11):10211-8. doi: 10.1166/jnn.2011.4991.
We investigate the chemical sensing behavior of composites prepared with polyvinyl alcohol and carbon materials (undoped multiwalled carbon nanotubes, nitrogen-doped multiwalled carbon nanotubes and carbon nanocoils). We determine the sensitivity of thin films of these composites for ethanol, methanol and toluene vapor, comparing their conductance and capacitance responses. The composite that exhibits highest sensitivity depends on specific vapor, vapor concentration and measured electrical response, showing that the interactivity of the carbon structure with chemical species depend on structural specificities of the carbon structure and doping.
我们研究了用聚乙烯醇和碳材料（未掺杂的多壁碳纳米管、氮掺杂的多壁碳纳米管和碳纳米线圈）制备的复合材料的化学传感行为。我们测定了这些复合材料薄膜对乙醇、甲醇和甲苯蒸气的灵敏度，比较了它们的电导和电容响应。表现出最高灵敏度的复合材料取决于特定的蒸气、蒸气浓度和测量的电响应，这表明碳结构与化学物质的相互作用取决于碳结构的结构特异性和掺杂情况。
