期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 183, 期 -, 页码 419-427出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.03.125
关键词
Nanostructured polyaniline; Polyaniline/Ag nanocomposites; Nanofibers; Gas sensor; Adsorption; Diffusion; Langmuir isotherm
资金
- Department of the Army Research Office [W911NF-10-1-0476]
- Materials Research Center, Missouri S T
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1005606] Funding Source: National Science Foundation
Polyaniline/Ag nanocomposite gas sensors have been fabricated with a single-step technique. The current response of the sensors to triethylamine and toluene was monitored and analyzed. The time dependence of the response to the two gases of the sensors was found to be exponential and was fit to chemisorption and diffusion models. The equilibrium absorption amounts from the chemisorption model were found to obey a Langmuir isotherm. The results of the diffusion model to the data were consistent with a dual sorption process, i.e., diffusive and non-diffusive adsorption sites. The estimated diffusion coefficients were found to increase with the concentration of diluent, probably due to the swelling of the polymer by the organic vapors. Our results suggest that both models can be employed to mathematically fit the sensor response. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据