Artículo
The effect of nitriding on the humidity sensing properties of hydrogenated amorphous carbon films
Frattini, Giuliano; Torres Cuenza, Sindry Natacha
; Silva, Leonel Ignacio
; Repetto, Carlos Enrique
; Gomez, Bernardo Jose Armando
; Dobry, Ariel Oscar
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Fecha de publicación:
05/2021
Editorial:
IOP Publishing
Revista:
Physica Scripta
ISSN:
0031-8949
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We have studied the effect of nitriding on the humidity sensing properties of hydrogenated amorphous carbon (a-C:H) films. The films were prepared in two stages combining the techniques of physical deposition in vapor phase evaporation (PAPVD) and plasma pulsed nitriding. By deconvolution of the Raman spectrum we identified two peaks corresponding to the D and G modes characteristic of a-C:H. After the N2-H2 plasma treating, the peaks narrowed and shifted to the right, which we associated with the incorporation of N into the structure. We compared the sensitivity to the relative humidity (RH) of the films before and after the N2-H2 plasma treatment. The nitriding improved the humidity sensitivity measured as the low frequency resistance. By impedance spectroscopy we studied the frequency dependence of the AC conductivity σ at different RH conditions. Before nitriding σ(ω) ∼ Aω s, it seemed to have the universal behaviour seen in other amorphous systems. The humidity changed the overall scale A. After nitriding, the exponent s increased, and became RH dependent. We associated this behaviour to the change of the interaction mechanism between the water molecule and the substrate when the samples were nitriding.
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Articulos(IFIR)
Articulos de INST.DE FISICA DE ROSARIO (I)
Articulos de INST.DE FISICA DE ROSARIO (I)
Articulos(INTEMA)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Citación
Frattini, Giuliano; Torres Cuenza, Sindry Natacha; Silva, Leonel Ignacio; Repetto, Carlos Enrique; Gomez, Bernardo Jose Armando; et al.; The effect of nitriding on the humidity sensing properties of hydrogenated amorphous carbon films; IOP Publishing; Physica Scripta; 96; 5; 5-2021; 1-8
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