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†

Wen-Shuo Kuo,‡*^abcd Chih-Li Lilian Hsu,‡^e Hua-Han Chen,‡^f Chia-Yuan Chang,^cd Hui-Fang Kao,^g Lawrence Chao-Shan Chou,^c Yi-Chun Chen,

^h Shean-Jen Chen,^ad Wen-Tsan Chang,ⁱ Shih-Wen Tseng,^c Jiu-Yao Wang*^bei and Ying-Chih Pu*^j

Author affiliations

* Corresponding authors

^a Advanced Optoelectronic Technology, National Cheng Kung University, Tainan 701, Taiwan, R.O.C
E-mail: wenshuokuo@mail.ncku.edu.tw

^b Allergy & Clinical Immunology Research Center, National Cheng Kung University, Tainan 701, Taiwan, R.O.C
E-mail: wenshuokuo@mail.ncku.edu.tw, a122@mail.ncku.edu.tw
Tel: +886-62353535 ext 5894

^c Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan, R.O.C
E-mail: wenshuokuo@mail.ncku.edu.tw

^d College of Photonics, National Chiao Tung University, Tainan 711, Taiwan, R.O.C.

^e Department of Microbiology & Immunology, National Cheng Kung University, Tainan 701, Taiwan, R.O.C
E-mail: a122@mail.ncku.edu.tw

^f Department of Food Science, National Penghu University of Science and Technology, Penghu 880, Taiwan, R.O.C.

^g Department of Nursing, National Tainan Junior College of Nursing, Tainan 700, Taiwan, R.O.C.

^h Department of Physics, National Cheng Kung University, Tainan 701, Taiwan, R.O.C.

ⁱ Department of Biochemistry and Molecular Biology, National Cheng Kung University, Tainan 701, Taiwan, R.O.C
E-mail: a122@mail.ncku.edu.tw

^j Department of Materials Science, National University of Tainan, Tainan 700, Taiwan, R.O.C
E-mail: ycpu@mail.nutn.edu.tw

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.

Nanoscale

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

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

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