Utilize este identificador para referenciar este registo: https://hdl.handle.net/10316/27485
Título: TiAgx thin films for lower limb prosthesis pressure sensors: effect of composition and structural changes on the electrical and thermal response of the films
Autor: Lopes, C. 
Gonçalves, C. 
Pedrosa, P. 
Macedo, F. 
Alves, E. 
Barradas, N. P. 
Martin, N. 
Fonseca, C. 
Vaz, F. 
Palavras-chave: Pressure sensors; TiAg films; XRD; Electrical resistivity; Thermal conductivity
Data: 15-Nov-2013
Editora: Elsevier
Citação: LOPES, C. [et. al] - TiAgx thin films for lower limb prosthesis pressure sensors: effect of composition and structural changes on the electrical and thermal response of the films. "Applied Surface Science". ISSN 0169-4332. Vol. 285 (2013) p. 10-18
Título da revista, periódico, livro ou evento: Applied Surface Science
Volume: 285
Resumo: Titanium–silver, Ti–Ag, thin films display excellent biocompatibility and reveal great potential to be used as conductive materials for prosthesis pressure sensors. In the frame of this work, TiAgx thin films were deposited onto silicon and glass substrates by DC magnetron sputtering, using a pure Ti target containing different amounts of Ag pellets. The films display Ag/Ti ratios varying from 0 up to 0.36, resulting in relatively large range of composition, which gave rise to varied morphological, structural and some selected property responses. For Ag/Ti ratios below 3.0 × 10−3, the TiAgx films exhibited similar behavior to those of standard Ti films. Above this critical value, the role of Ag becomes crucial on the crystallographic structure evolution, as well as on the surface morphology changes of the films. A gradual increase of the Ag/Ti ratio leads to the growth of Ti–Ag crystalline phases, whereas the long range order of Ti grains was reduced from 22 nm down to 7 nm. Similarly, a denser microstructure was developed with a reduction of the sharpness of the surface morphology. This critical Ag/Ti ratio (<3.0 × 10−3) also corresponded to an enhanced electrical resistivity, which reached a value of ρ300K = 72 μΩ cm. The thermal characterization revealed a similar trend, with the existence of two clear distinct zones, related again with the different critical composition ratios and the correspondent changes in both morphology and structural features.
URI: https://hdl.handle.net/10316/27485
ISSN: 0169-4332
DOI: 10.1016/j.apsusc.2013.07.021
Direitos: openAccess
Aparece nas coleções:I&D CEMMPRE - Artigos em Revistas Internacionais

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato
TiAgx thin films for lower limb prosthesis pressure sensors.pdf3.28 MBAdobe PDFVer/Abrir
Mostrar registo em formato completo

Citações SCOPUSTM   

31
Visto em 9/nov/2022

Citações WEB OF SCIENCETM
5

32
Visto em 2/mai/2023

Visualizações de página 50

432
Visto em 26/mar/2024

Downloads 50

487
Visto em 26/mar/2024

Google ScholarTM

Verificar

Altmetric

Altmetric


Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.