Abstract

Water wetting and adhesion control on polymeric patterns are achieved by tuning the configuration of their surface's structural characteristics from single to dual and triple length-scale. In particular, surfaces with combined micro-, submicrometer-,and nanoroughness are developed, using photolithographically structured SU-8 micro-pillars as substrates for the consecutive spray deposition of polytetrafluoroethylene (PTFE) submicrometer particles and hydrophobically capped iron oxide colloidal nanoparticles. The PTFE particles alone or in combination with the nanoparticles render the SU-8 micropillars superhydrophobic. The water adhesion behaviour of the sprayed pillars is more complex since they can be tuned gradually from totally adhesive to completely non adhesive. The influence of the hierarchical geometrical features of the functionalized surfaces on this behaviour is discussed within the frame of the theory. Specially designed surfaces using the described technique are presented for selective drop deposition and evaporation. This simple method for liquid adhesion control on superhydrophobic surfaces can find various applications in the field of microfluidics, sensors, biotechnology, antifouling materials, etc.

Autore Pugliese

• Cozzoli Pantaleo Davide

Tutti gli autori

• A. Milionis , D. Fragouli , L. Martiradonna , G.C. Anyfantis , P.D. Cozzoli , I. S. Bayer , A. Athanassiou

Titolo volume/Rivista

ACS APPLIED MATERIALS & INTERFACES

Anno di pubblicazione

2014

ISSN

1944-8244

ISBN

Non Disponibile

Numero di citazioni Wos

33

Ultimo Aggiornamento Citazioni

28/04/2018

Numero di citazioni Scopus

38

Ultimo Aggiornamento Citazioni

28/04/2018

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile