resumo
The use of an excimer benchtop pulsed UV laser as the energy source for the photochemical modification of the surface of diamond films is reported. Boron-doped nanocrystalline diamond (NCD) films were deposited on Si wafers via plasma-enhanced chemical vapour deposition (PECVD). The as-deposited films were characterised by scanning electron microscopy (SEM), Raman spectroscopy, and X-ray diffraction (XRD). Following characterisation, the surfaces of the films were subjected to a photochemical reaction with 2,2,2-trifluoroethyl undec-10enoate using two different sources of radiation: a benchtop UV lamp (254 nm) and a KrF excimer pulsed UV laser (248 nm). The photochemically treated films were characterised by contact angle measurements and X-ray photoelectric spectroscopy (XPS) using non-treated films as a control. The use of a pulsed UV laser source was shown to reduce the photochemical reaction time from several hours to a few minutes.
palavras-chave
DNA ATTACHMENT; THIN-FILMS; FUNCTIONALIZATION; PHOTOELECTRON
categoria
Materials Science; Physics
autores
Silva, M; Santos, NE; Pinto, M; Guieu, S; Oliveira, R; Figueira, F; Paz, FAA; Neto, M; Rino, L; Deuermeier, J; Maradiya, M; Liehr, M; Mendes, JC; Braga, SS
nossos autores
Filipe Alexandre Almeida Paz
Investigador Principal
Flávio Alberto da Silva Figueira
Investigador Júnior
Miguel Ângelo da Costa Neto
Investigador Principal
Samuel Jacques André Guieu
Investigador Júnior
Susana Isabel Fonseca de Almeida Santos Braga
InvestigadorGrupos
G1 - Materiais Porosos e Nanossistemas
G3 - Materiais Eletroquímicos, Interfaces e Revestimentos
Projectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
Funding by FCT/MCTES (Fundacao para a Ciencia e a Tecnologia) through national funds (PIDDAC) and, where applicable, co-financed by the European Regional Development Fund (FEDER) is acknowledged by LAQV-REQUIMTE (Ref. UIDB/50006/2020, doi 10.54499/UIDP/50006/2020) , by Instituto de Telecomunicacoes (Refs. UIDB/50008/2020-UIDP/50008/2020 and PTDC/EEI-TEL/1511/2020) , by CICECO (Refs. UIDB/50011/2020, doi 10.54499/UIDB/50011/2020; UIDP/50011/2020, doi 10.54499/UIDP/50011/2020; LA/P/0006/2020, doi 10.54499/LA/P/0006/2020) and by i3N (Refs. LA/P/0037/2020, UIDP/50025/2020 and UIDB/50025/2020) . NES acknowledges the FCT PhD scholarship 2022.09798. RO acknowledges the FCT contract CEE-CIND2021.01066. JD acknowledges the FCT contract CEECINST/00102/2018.