Spray-Coating Thin Films on Three-Dimensional Surfaces for a Semitransparent Capacitive-Touch Device | Zendy

Tian Carey | Zendy; Chris Jones | Zendy; Fred Le Moal | Zendy; Davide Deganello | Zendy; Felice Torrisi | Zendy

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Spray-Coating Thin Films on Three-Dimensional Surfaces for a Semitransparent Capacitive-Touch Device

Author(s) -

Tian Carey,

Chris Jones,

Fred Le Moal,

Davide Deganello,

Felice Torrisi

Publication year - 2018

Publication title -

acs applied materials and interfaces

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.535

H-Index - 228

eISSN - 1944-8252

pISSN - 1944-8244

DOI - 10.1021/acsami.8b02784

Subject(s) - materials science , pedot:pss , coating , electrode , graphene , optoelectronics , carbon nanotube , conformal coating , capacitive sensing , electrical conductor , polymer , conductive polymer , thin film , optics , composite material , nanotechnology , computer science , operating system , chemistry , physics

Here, we formulate low surface tension (∼30 mN/m) and low boiling point (∼79 °C) inks of graphene, single-wall carbon nanotubes and conductive polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and demonstrate their viability for spray-coating of morphologically uniform ( S q ≈ 48 ± 3 nm), transparent conducting films (TCFs) at room temperature (∼20 °C), which conform to three dimensional curved surfaces. Large area (∼750 cm 2 ) hybrid PEDOT:PSS/graphene films achieved an optical transmission of 67% in the UV and 64% in the near-infrared wavelengths with a conductivity of ∼10 4 S/m. Finally, we demonstrate the spray-coating of TCFs as an electrode on the inside of a poly(methyl methacrylate) sphere, enabling a semitransparent (around 360°) and spherical touch sensor for interactive devices.

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