PMID- 23889192
OWN - NLM
STAT- MEDLINE
DCOM- 20140422
LR  - 20130925
IS  - 1944-8252 (Electronic)
IS  - 1944-8244 (Linking)
VI  - 5
IP  - 18
DP  - 2013 Sep 25
TI  - Superhydrophobic TiO2-polymer nanocomposite surface with UV-induced reversible 
      wettability and self-cleaning properties.
PG  - 8915-24
LID - 10.1021/am401668y [doi]
AB  - Multifunctional superhydrophobic nanocomposite surfaces based on photocatalytic 
      materials, such as fluorosilane modified TiO2, have generated significant 
      research interest. However, there are two challenges to forming such 
      multifunctional surfaces with stable superhydrophobic properties: the 
      photocatalytic oxidation of the hydrophobic functional groups, which leads to the 
      permanent loss of superhydrophobicity, as well as the photoinduced reversible 
      hydrolysis of the catalytic particle surface. Herein, we report a simple and 
      inexpensive template lamination method to fabricate multifunctional 
      TiO2-high-density polyethylene (HDPE) nanocomposite surfaces exhibiting 
      superhydrophobicity, UV-induced reversible wettability, and self-cleaning 
      properties. The laminated surface possesses a hierarchical roughness spanning the 
      micro- to nanoscale range. This was achieved by using a wire mesh template to 
      emboss the HDPE surface creating an array of polymeric posts while partially 
      embedding untreated TiO2 nanoparticles selectively into the top surface of these 
      features. The surface exhibits excellent superhydrophobic properties immediately 
      after lamination without any chemical surface modification to the TiO2 
      nanoparticles. Exposure to UV light causes the surface to become hydrophilic. 
      This change in wettability can be reversed by heating the surface to restore 
      superhydrophobicity. The effect of TiO2 nanoparticle surface coverage and 
      chemical composition on the mechanism and magnitude of wettability changes was 
      studied by EDX and XPS. In addition, the ability of the surface to shed impacting 
      water droplets as well as the ability of such droplets to clean away particulate 
      contaminants was demonstrated.
FAU - Xu, Qian Feng
AU  - Xu QF
AD  - Department of Chemistry, College of Staten Island, City University of New York , 
      New York, New York 10314, United States.
FAU - Liu, Yang
AU  - Liu Y
FAU - Lin, Fang-Ju
AU  - Lin FJ
FAU - Mondal, Bikash
AU  - Mondal B
FAU - Lyons, Alan M
AU  - Lyons AM
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20130906
PL  - United States
TA  - ACS Appl Mater Interfaces
JT  - ACS applied materials & interfaces
JID - 101504991
RN  - 0 (Polyethylenes)
RN  - 15FIX9V2JP (titanium dioxide)
RN  - D1JT611TNE (Titanium)
SB  - IM
MH  - Catalysis
MH  - Hydrophobic and Hydrophilic Interactions
MH  - Nanocomposites/*chemistry
MH  - Oxidation-Reduction
MH  - Polyethylenes/*chemistry
MH  - Surface Properties
MH  - Titanium/*chemistry
MH  - *Ultraviolet Rays
MH  - Wettability
EDAT- 2013/07/31 06:00
MHDA- 2014/04/23 06:00
CRDT- 2013/07/30 06:00
PHST- 2013/07/30 06:00 [entrez]
PHST- 2013/07/31 06:00 [pubmed]
PHST- 2014/04/23 06:00 [medline]
AID - 10.1021/am401668y [doi]
PST - ppublish
SO  - ACS Appl Mater Interfaces. 2013 Sep 25;5(18):8915-24. doi: 10.1021/am401668y. 
      Epub 2013 Sep 6.