Preprint Article Version 1 This version is not peer-reviewed

Highly Photoluminescent Nitrogen-Doped Carbon Dots Prepared by Hydrothermal Decomposition of Piperazine Citrate

Version 1 : Received: 30 September 2017 / Approved: 30 September 2017 / Online: 30 September 2017 (05:59:34 CEST)

How to cite: Kim, M.; Yu, K.S.; Kim, J.; Han, S.Y.; Lee, N.S.; Jeong, Y.G.; Kim, D.K. Highly Photoluminescent Nitrogen-Doped Carbon Dots Prepared by Hydrothermal Decomposition of Piperazine Citrate. Preprints 2017, 2017090169 (doi: 10.20944/preprints201709.0169.v1). Kim, M.; Yu, K.S.; Kim, J.; Han, S.Y.; Lee, N.S.; Jeong, Y.G.; Kim, D.K. Highly Photoluminescent Nitrogen-Doped Carbon Dots Prepared by Hydrothermal Decomposition of Piperazine Citrate. Preprints 2017, 2017090169 (doi: 10.20944/preprints201709.0169.v1).

Abstract

Highly photoluminescent C-Dots are prepared by hydrothermal reaction of citric acid and piperazine as dual reason in both hydrolysis and surface passivation agent along with the N-doping agent. The resulting C-Dots without external passivation showed PL enhancement by electron transfer from C-Dots-donor to piperazine-acceptor with the maximum emission yields of more than 84%. After mixing the prepared C-Dots with the mixture of EtOH and acetone (1:1 vol %), a novel washing process was performed by centrifugation to remove the precursors and by-products. The resulting C-Dots showed much better stability than dialysis. For evaluating the possible application of the C-Dots as a fluorescent biological probe which possess the wide dosing window and multicolor properties. The C-Dots were localized in perinuclear vacuole-like structures with granular pattern in cytoplasm sparing the nucleus. No signs of any morphological deterioration like nuclear shrinkage were observed.

Subject Areas

carbon dots; fluorescent; nanoparticles; multicolor imaging; quantum yield

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