Colorimetric Thermometer from Graphene Oxide Platform Integrated with Red, Green, and Blue Emitting, Responsive Block Copolymers

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• 作者：Junhyuk Lee ; Hyunseung Yang ; Chan Ho Park ; Han-Hee Cho ; Hongseok Yun ; Bumjoon J. Kim
• 刊名：Chemistry of Materials
• 出版年：2016
• 出版时间：May 24, 2016
• 年：2016
• 卷：28
• 期：10
• 页码：3446-3453
• 全文大小：547K
• 年卷期：0
• ISSN：1520-5002

文摘

We 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.