English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/126906
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Graphene/Silicon heterojunction schottky diode for vapors sensing using impedance spectroscopy

AutorFattah, Ali; Khatami, Saeid; Mayorga-Martínez, Carmen C. ; Medina-Sánchez, Mariana ; Baptista-Pires, Luis ; Merkoçi, Arben
Fecha de publicación2014
EditorWiley-VCH
CitaciónSmall 10(20): 4193-4199 (2014)
ResumenA graphene(G)/Silicon(Si) heterojunction Schottky diode and a simple method that evaluates its electrical response to different chemical vapors using electrochemical impedance spectroscopy (EIS) are implemented. To study the impedance response of the device of a given vapor, relative impedance change (RIC) as a function of the frequency is evaluated. The minimum value of RIC for different vapors corresponds to different frequency values (18.7, 12.9 and 10.7 KHz for chloroform, phenol, and methanol vapors respectively). The impedance responses to phenol, beside other gases used as model analytes for different vapor concentrations are studied. The equivalent circuit of the device is obtained and simplifi ed, using data fi tting from the extracted values of resistances and capacitances. The resistance corresponding to interphase G/Si is used as a parameter to compare the performance of this device upon different phenol concentrations and a high reproducibility with a 4.4% relative standard deviation is obtained. The effi ciency of the device fabrication, its selectivity, reproducibility and easy measurement mode using EIS makes the developed system an interesting alternative for gases detection for environmental monitoring and other industrial applications.
URIhttp://hdl.handle.net/10261/126906
DOI10.1002/smll.201400691
Identificadoresdoi: 10.1002/smll.201400691
issn: 1613-6810
e-issn: 1613-6829
Aparece en las colecciones: (CIN2) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.