Optical properties and electron dynamics in carbon nanodots

Xiaoming Wen; Shujuan Huang; Gavin Conibeer; Santosh Shrestha; Pyng Yu; Yon-Rui Toh; Jau Tang

doi:10.1117/12.2035308

7 December 2013 Optical properties and electron dynamics in carbon nanodots

Xiaoming Wen, Shujuan Huang, Gavin Conibeer, Santosh Shrestha, Pyng Yu, Yon-Rui Toh, Jau Tang

Proceedings Volume 8923, Micro/Nano Materials, Devices, and Systems; 89231L (2013) https://doi.org/10.1117/12.2035308
Event: SPIE Micro+Nano Materials, Devices, and Applications, 2013, Melbourne, Victoria, Australia

Abstract

Carbon nanodots (CNDs) have emerged as fascinating materials with exceptional electronic and optical properties, and thus they offer promising applications in photonics, photovoltaics and photocatalysis. Herein we study the optical properties and electron dynamics in CNDs using steady state and time-resolved spectroscopy. The photoluminescence (PL) is determined to originate from both core and surface. The massive surface fluorophores result in a broad spectral fluorescence. In addition to various synthesis techniques, it is demonstrated that the PL of CNDs can be extended from the blue to the near infrared by thermal assisted growth. Directional electron transfer was observed as fast as femtosecond in CND-graphene oxide nanocomposites from CND into graphene oxide. These results suggest CNDs can be promising in many applications.

Citation Download Citation

Xiaoming Wen, Shujuan Huang, Gavin Conibeer, Santosh Shrestha, Pyng Yu, Yon-Rui Toh, and Jau Tang "Optical properties and electron dynamics in carbon nanodots", Proc. SPIE 8923, Micro/Nano Materials, Devices, and Systems, 89231L (7 December 2013); https://doi.org/10.1117/12.2035308

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