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Title

Chemical postdeposition treatments to improve the adhesion of carbon nanotube films on plastic substrates

AuthorsSantidrián, Ana; Sanahuja-Parejo, Olga; Villacampa, Belén; Diez-Ferrer, Jose Luis; Benito, Ana M. ; Maser, Wolfgang K. ; Muñoz, Edgar ; Ansón Casaos, Alejandro
KeywordsSingle-walled carbon nanotubes
Chemical treatments
Adhesion
Plastic substrates
PET
PVF
Nanotubos de carbono de capa única
Tratamientos químicos
Adhesión
Sustratos plásticos
PET
PVF
Issue Date6-Feb-2019
PublisherAmerican Chemical Society
CitationACS Omega 4(2): 2804−2811 (2019)
AbstractThe robust adhesion of single-walled carbon nanotubes (SWCNTs) to plastic substrates is a key issue toward their use in flexible electronic devices. In this work, semitransparent SWCNT films were prepared by spray-coating on two different plastic substrates, specifically poly(ethylene terephthalate) and poly(vinylidene fluoride). The deposited SWCNT films were treated by dipping in suitable solvents separately, namely, 53% nitric acid (HNO3) and N-methyl pyrrolidone. Direct evidence of SWCNT adhesion to the substrate was obtained by a peel-off test carried out with an adhesive tape. Moreover, these treatments caused enhanced film transparency and electrical conductivity. Electron microscopy images suggested that SWCNTs were embedded in the plastic substrates, forming a thin layer of conductive composite materials. Raman spectroscopy detected a certain level of doping in the SWCNTs after the chemical treatments, which particularly affected metallic nanotubes in the case of the HNO3 treatment. The microscopic adhesion and hardness of the SWCNT films were studied through a nanoscratch test. Overall, the efficiency of selected chemical postdeposition treatments for improving the SWCNT adhesion and the robustness of the resulting SWCNT films are demonstrated on flexible substrates of different chemical compositions.
Publisher version (URL)http://dx.doi.org/10.1021/acsomega.8b03475
URIhttp://hdl.handle.net/10261/176212
DOI10.1021/acsomega.8b03475
E-ISSN2470-1343
Appears in Collections:(ICB) Artículos
(ICMA) Artículos
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