Graphene quantum dots conjugated with polymers for two-photon properties under two-photon excitation

Wen-Shuo Kuo; Chih-Li Lilian Hsu; Hua-Han Chen; Chia-Yuan Chang; Hui-Fang Kao; Lawrence Chao-Shan Chou; Yi-Chun Chen; Shean-Jen Chen; Wen-Tsan Chang; Shih-Wen Tseng; Jiu-Yao Wang; Ying-Chih Pu

doi:10.1039/c6nr02614a

Graphene quantum dots conjugated with polymers for two-photon properties under two-photon excitation

Nanoscale. 2016 Sep 29;8(38):16874-16880. doi: 10.1039/c6nr02614a.

Authors

Affiliations

¹ Advanced Optoelectronic Technology, National Cheng Kung University, Tainan 701, Taiwan, R.O.C. wenshuokuo@mail.ncku.edu.tw and Allergy & Clinical Immunology Research Center, National Cheng Kung University, Tainan 701, Taiwan, R.O.C. wenshuokuo@mail.ncku.edu.tw a122@mail.ncku.edu.tw and Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan, R.O.C. wenshuokuo@mail.ncku.edu.tw and College of Photonics, National Chiao Tung University, Tainan 711, Taiwan, R.O.C.
² Department of Microbiology & Immunology, National Cheng Kung University, Tainan 701, Taiwan, R.O.C. a122@mail.ncku.edu.tw.
³ Department of Food Science, National Penghu University of Science and Technology, Penghu 880, Taiwan, R.O.C.
⁴ Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan, R.O.C. wenshuokuo@mail.ncku.edu.tw and College of Photonics, National Chiao Tung University, Tainan 711, Taiwan, R.O.C.
⁵ Department of Nursing, National Tainan Junior College of Nursing, Tainan 700, Taiwan, R.O.C.
⁶ Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan, R.O.C. wenshuokuo@mail.ncku.edu.tw.
⁷ Department of Physics, National Cheng Kung University, Tainan 701, Taiwan, R.O.C.
⁸ Advanced Optoelectronic Technology, National Cheng Kung University, Tainan 701, Taiwan, R.O.C. wenshuokuo@mail.ncku.edu.tw and College of Photonics, National Chiao Tung University, Tainan 711, Taiwan, R.O.C.
⁹ Department of Biochemistry and Molecular Biology, National Cheng Kung University, Tainan 701, Taiwan, R.O.C. a122@mail.ncku.edu.tw.
¹⁰ Allergy & Clinical Immunology Research Center, National Cheng Kung University, Tainan 701, Taiwan, R.O.C. wenshuokuo@mail.ncku.edu.tw a122@mail.ncku.edu.tw and Department of Microbiology & Immunology, National Cheng Kung University, Tainan 701, Taiwan, R.O.C. a122@mail.ncku.edu.tw and Department of Biochemistry and Molecular Biology, National Cheng Kung University, Tainan 701, Taiwan, R.O.C. a122@mail.ncku.edu.tw.
¹¹ Department of Materials Science, National University of Tainan, Tainan 700, Taiwan, R.O.C. ycpu@mail.nutn.edu.tw.

PMID: 27722374
DOI: 10.1039/c6nr02614a

Abstract

Few studies have investigated the two-photon properties of graphene quantum dots (GQDs) and GQD-conjugated polymers. The results of the present study revealed that conjugated polymers containing nitrogen and sulfur atoms caused higher quantum confinement of emissive energy to be trapped on the surface of nanomaterials, resulting in a high-photoluminescence quantum yield and notable two-photon properties. Additionally, the nanomaterials generated no reactive oxygen species-dependent oxidative stress on cells and served as promising two-photon contrast probes.