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Updated: Mar 13, 2026
Compact Quantum Dots for Single-molecule Imaging
Published on: October 9, 2012
Graphene quantum dots conjugated with polymers for two-photon properties under two-photon excitation
Wen-Shuo Kuo1, Chih-Li Lilian Hsu2, Hua-Han Chen3
1Advanced 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.
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.
