PMID- 24916052
OWN - NLM
STAT- MEDLINE
DCOM- 20151117
LR  - 20140611
IS  - 1944-8252 (Electronic)
IS  - 1944-8244 (Linking)
VI  - 6
IP  - 11
DP  - 2014 Jun 11
TI  - Light-induced color changes of microgel-based etalons.
PG  - 8461-6
LID - 10.1021/am501330z [doi]
AB  - Poly(N-isopropylacrylamide) (pNIPAm) microgel-based etalons were used to 
      fabricate systems that change visual color in response to light exposure. These 
      systems were fabricated by adding pH responsive microgel-based etalons to a 
      solution composed of the photoacid o-nitrobenzaldehyde (o-NBA). Upon exposure of 
      this system to ultraviolet (UV) irradiation, the photoacid released a proton, 
      lowering the pH of the solution. Since the pNIPAm microgel-based etalon was 
      responsive to pH, the etalon changed its optical properties and, hence, visual 
      color. We went on to show that patterned etalons could be fabricated, which only 
      contained pH-responsive microgels in specific regions. These etalons only changed 
      color in the pH-responsive regions, to yield patterns that change color upon UV 
      light exposure. Finally, the color of the etalon was shown to be fully reversible 
      and could be switched multiple times. These unique systems could potentially be 
      used for display technologies, and as a controlled/triggered drug delivery 
      system.
FAU - Gao, Yongfeng
AU  - Gao Y
AD  - Department of Chemistry, University of Alberta , Edmonton, Alberta, Canada T6G 
      2G2.
FAU - Serpe, Michael J
AU  - Serpe MJ
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20140425
PL  - United States
TA  - ACS Appl Mater Interfaces
JT  - ACS applied materials & interfaces
JID - 101504991
RN  - 0 (Acrylamides)
RN  - 0 (Gels)
RN  - B7GFF17L9U (N-isopropylacrylamide)
SB  - IM
MH  - Acrylamides/chemistry
MH  - *Color
MH  - *Gels
MH  - Hydrogen-Ion Concentration
MH  - *Ultraviolet Rays
EDAT- 2014/06/12 06:00
MHDA- 2015/11/18 06:00
CRDT- 2014/06/12 06:00
PHST- 2014/06/12 06:00 [entrez]
PHST- 2014/06/12 06:00 [pubmed]
PHST- 2015/11/18 06:00 [medline]
AID - 10.1021/am501330z [doi]
PST - ppublish
SO  - ACS Appl Mater Interfaces. 2014 Jun 11;6(11):8461-6. doi: 10.1021/am501330z. Epub 
      2014 Apr 25.