TY - JOUR
T1 - Multicolor Emitting Block Copolymer-Integrated Graphene Quantum Dots for Colorimetric, Simultaneous Sensing of Temperature, pH, and Metal Ions
AU - Park, Chan Ho
AU - Yang, Hyunseung
AU - Lee, Junhyuk
AU - Cho, Han Hee
AU - Kim, Dahin
AU - Lee, Doh C.
AU - Kim, Bumjoon J.
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/8/11
Y1 - 2015/8/11
N2 - Highly selective optical sensors that are capable of detecting complex stimuli have attracted significant interest in environmental, biomedical, and analytical chemistry applications. In this Article, we report the development of novel and versatile platform for highly efficient, colorimetric multifunctional sensors using block copolymer-integrated graphene quantum dots (bcp-GQDs). In particular, the multisensing behavior is successfully generated simply by grafting blue-emitting, temperature-responsive block copolymers onto green-emitting, 10 nm size GQD that provides luminescent response to pH changes. Thus, the bcp-GQDs showed simultaneous, orthogonal sensing behavior to temperature and pH, as well as dose-dependent responses to different types of metal ions. In addition, the bcp-GQD sensor showed excellent reversibility and dispersion stability in pure water, indicating that our system is an ideal platform for environmental and biological applications. The detailed mechanism of the responsive behavior of the bcp-GQDs was elucidated by measurements of time-resolved fluorescence and dynamic light scattering.
AB - Highly selective optical sensors that are capable of detecting complex stimuli have attracted significant interest in environmental, biomedical, and analytical chemistry applications. In this Article, we report the development of novel and versatile platform for highly efficient, colorimetric multifunctional sensors using block copolymer-integrated graphene quantum dots (bcp-GQDs). In particular, the multisensing behavior is successfully generated simply by grafting blue-emitting, temperature-responsive block copolymers onto green-emitting, 10 nm size GQD that provides luminescent response to pH changes. Thus, the bcp-GQDs showed simultaneous, orthogonal sensing behavior to temperature and pH, as well as dose-dependent responses to different types of metal ions. In addition, the bcp-GQD sensor showed excellent reversibility and dispersion stability in pure water, indicating that our system is an ideal platform for environmental and biological applications. The detailed mechanism of the responsive behavior of the bcp-GQDs was elucidated by measurements of time-resolved fluorescence and dynamic light scattering.
UR - http://www.scopus.com/inward/record.url?scp=84939188689&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.5b01545
DO - 10.1021/acs.chemmater.5b01545
M3 - Article
AN - SCOPUS:84939188689
SN - 0897-4756
VL - 27
SP - 5288
EP - 5294
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 15
ER -