resumo
The wettability of copper can be modified using laser patterning, allowing the surface to achieve a superhydrophobic behavior after aging in ambient conditions or in a faster way when combined with a green engineering method (heating in an ethanol bath). The surface chemistry of copper irradiated with a 355 nm pulsed laser was studied using Raman spectroscopy and Fourier transform infrared measurements allowing to discuss the mechanism responsible for the wettability change. It was found that the adsorption of organic compounds rather, than the reduction of CuO to Cu2O previously presented in the literature as the dominant effect, is what plays a key role in this process. Moreover, the superhydrophobic copper presents an ability to delay the formation of patina allowing the copper surface to keep its electrical conductivity for a longer time when compared with non-irradiated copper exposed to the same conditions. Copper and its alloys are widely used in applications that take advantage of their electrical conductivity, so the reported strategy to maintain the electrical conductivity of the surface presents remarkable interest.
palavras-chave
RAMAN-SPECTROSCOPY; FABRICATION; LOTUS; NANOSTRUCTURES; WETTABILITY; OXIDATION; CASSIE
categoria
Chemistry; Materials Science; Physics
autores
Botas, AMP; Carvalho, AF; Fernandes, AJS; Falcao, BP; Yasakau, K; Leitao, JP; Tedim, J; Costa, FM
nossos autores
Alexandre Manuel Pedroso Botas
Bolseiro de pós-Doutoramento
Bruno Teixeira de Poças Falcão
Investigador Júnior
João Tedim
Professor Associado com Agregação
Kiryl Yasakau
Investigador AuxiliarGrupos
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)
Collaboratory for Emerging Technologies, CoLab (EMERGING TECHNOLOGIES)
agradecimentos
This work was carried out within I3N laboratory (LA/P/0037/2020, UIDB/50025/2020 & UIDP/50025/2020) , financed by national funds through FCT and MCTES. The project from CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MCTES (PIDDAC) is acknowledged. This work was funded by the European Union (Grant Agreement number: 101091982 - SURE2COAT) . KY acknowledges FCT for the researcher grant (2021.00842.CEECIND) . BPF acknowledges the financial support from Project "Agenda ILLIANCE" [C644919832-00000035 | Project n degrees 46], financed by PRR - Plano de Recuperacao e Resiliencia under the Next Generation EU from the European Union.