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Download fileColorimetric Thermometer from Graphene Oxide Platform Integrated with Red, Green, and Blue Emitting, Responsive Block Copolymers
journal contribution
posted on 2016-04-19, 00:00 authored by Junhyuk Lee, Hyunseung Yang, Chan Ho Park, Han-Hee Cho, Hongseok Yun, Bumjoon J. KimWe
developed an efficient colorimetric thermometer that detects temperature
ranging from 25 to 45 °C using a novel platform of block copolymers
(BCPs) integrated onto graphene oxide (GO). In order to achieve colorimetric
sensing over a wide range of temperatures, GO was functionalized with
three different BCPs: each BCP is composed of a temperature-responsive
block and a fluorescent block. Each temperature responsive block had
a different lower critical solution temperature to monitor different
but complementary temperature ranges. The fluorescent blocks of the
three BCPs emitted red, green, or blue light to provide a colorimetric
response to temperature changes. The fluorescent intensities of the
three BCPs on GO were independently switched on and off with changes
in temperature, producing a colorimetric behavior from white to yellow
to red and then to green in the range of 25–45 °C with
excellent reversibility and stability. Importantly, we successfully
demonstrated the use of our sensors for detecting the temperature
response within microsized domains, suggesting that our system
is a promising platform for practical applications, for example, in
clinical and environmental monitoring.
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colorimetric thermometertemperature rangesBCPcolorimetric responsegraphene oxidemicrosized domainsResponsive Block Copolymerscolorimetric behaviorColorimetric Thermometersolution temperatureGraphene Oxide Platform Integratedtemperature changestemperature responseBlue Emittingnovel platformblock copolymers