Directional enhancement of refractive index and tunable wettability of polymeric coatings due to preferential dispersion of colloidal TiO2 nanorods towards their surface

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Abstract

We demonstrate the fabrication of nanocomposite coatings, of organic-capped colloidal TiO2 nanorods dispersed into a poly(methyl methacrylate) matrix, with rising value of refractive index from the bottom to the top layers, and UV-induced surface wettability alteration, in a reversible manner. This behaviour is attributable to preferential dispersion of the TiO2 nanoparticles towards the superficial layers of the coatings. Above a critical TiO2 loading, the nanorods at the surface form aggregates deteriorating the optical and the surface properties of the nanocomposites. The optimal conditions for nanocomposite films preparation in terms of optimized nanorods dispersion, optical clarity, and surface smoothness are determined.

Autore Pugliese

Tutti gli autori

  • F. PIGNATELLI , R. CARZINO , M. SALERNO , M. SCOTTO , C. CANALE , M. DISTASO , F. RIZZI , G. CAPUTO , P. D. COZZOLI , R. CINGOLANI , A. ATHANASSIOU

Titolo volume/Rivista

THIN SOLID FILMS

Anno di pubblicazione

2010

ISSN

0040-6090

ISBN

Non Disponibile

Numero di citazioni Wos

16

Ultimo Aggiornamento Citazioni

28/04/2018

Numero di citazioni Scopus

15

Ultimo Aggiornamento Citazioni

28/04/2018

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile