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Photochemical modification of a diamond surface using a pulsed UV laser as the energy source
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Resumo(s)
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-10-enoate 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.
Descrição
Funding Information: Funding by FCT/MCTES (Funda\u00E7\u00E3o para a Ci\u00EAncia 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 Telecomunica\u00E7\u00F5es (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 CEECIND2021.01066. JD acknowledges the FCT contract CEECINST/00102/2018. Publisher Copyright: © 2024 The Authors
Palavras-chave
Biosensor Diamond Photochemical reactions Surface chemistry UV laser Electronic, Optical and Magnetic Materials General Chemistry Mechanical Engineering General Physics and Astronomy Materials Chemistry Electrical and Electronic Engineering