@article {Ferreira2004236,
	title = {Ethanol vapour detector based in porous a-Si:H films produced by HW-CVD technique},
	journal = {Sensors and Actuators, B: Chemical},
	volume = {100},
	number = {1-2},
	year = {2004},
	note = {<p>cited By 2</p>
},
	pages = {236-239},
	abstract = {<p>In this work, we show the possibility to use undoped porous silicon (PS) thin films produced by hot wire chemical vapour deposition technique (HW-CVD) as ethanol detector. Silicon thins films produced by HW-CVD technique, under certain deposition conditions, have a porous structure [Vacuum 52 (1999) 147]. Therefore, in the presence of an alcohol, the OH group is adsorbed by the uncompensated bonds behaving as donor-like carriers leading to an increase in the current flowing through the material. This current enhancement is bias dependent in glass/ITO/i-a-Si:H/Al sensor and increases as the ethanol vapour pressure increases from 10-1mbar to atmospheric pressure. The response time of the current of the sensor and its recovery time are in the range of 10-50s at room temperature. Ethanol quantities above 50ppm can be detected. {\textcopyright} Published by Elsevier B.V.</p>
},
	doi = {10.1016/j.snb.2004.01.008},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-2342584734\&partnerID=40\&md5=c2c9ae6f1f9054e30b218b7c79ce519e},
	author = {Ferreira, I., Fortunato, E., Martins, R.}
}
