Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/2214
Título: Membrane selectivity versus sensor response in hydrogenated amorphous silicon CHEMFETs using a semi-empirical model
Autor: Costa, João
Fernandes, Miguel
Vieira, Maria Manuela Almeida Carvalho
Lavareda, G.
Karmali, Amin Mahamede Vissanji
Palavras-chave: Amorphous
Silicon
Membrane
Selectivity
Ammonium
Field-effect transistors
ISFET
Data: Out-2011
Editora: Amer Scientific Publishers
Citação: COSTA, J.; FERNANDES, M.; VIEIRA, M.; LAVAREDA, G.; KARMALI, A. - Membrane Selectivity versus Sensor Response in Hydrogenated Amorphous Silicon CHEMFETs Using a Semi-Empirical Model.Journal of Nanoscience and Nanotechnology. ISSN 1533-4880. Vol. 11, n. º10 (2011) p. 8844-8847.
Resumo: Toxic amides, such as acrylamide, are potentially harmful to Human health, so there is great interest in the fabrication of compact and economical devices to measure their concentration in food products and effluents. The CHEmically Modified Field Effect Transistor (CHEMFET) based onamorphous silicon technology is a candidate for this type of application due to its low fabrication cost. In this article we have used a semi-empirical modelof the device to predict its performance in a solution of interfering ions. The actual semiconductor unit of the sensor was fabricated by the PECVD technique in the top gate configuration. The CHEMFET simulation was performed based on the experimental current voltage curves of the semiconductor unit and on an empirical model of the polymeric membrane. Results presented here are useful for selection and design of CHEMFET membranes and provide an idea of the limitations of the amorphous CHEMFET device. In addition to the economical advantage, the small size of this prototype means it is appropriate for in situ operation and integration in a sensor array.
Peer review: yes
URI: http://hdl.handle.net/10400.21/2214
ISSN: 1533-4880
Aparece nas colecções:ISEL - Eng. Elect. Tel. Comp. - Artigos



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