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Title: Blue photoluminescent carbon nanodots from limeade
Authors: Phitsini Suvarnaphaet
Chandra Sekhar Tiwary
Jutaphet Wetcharungsri
Supanit Porntheeraphat
Rassmidara Hoonsawat
Pulickel Madhavapanicker Ajayan
I. Ming Tang
Piyapong Asanithi
Mahidol University
Rice University
Thailand National Electronics and Computer Technology Center
Kasetsart University
King Mongkut s University of Technology Thonburi
Commission of Higher Education
Keywords: Engineering;Materials Science
Issue Date: 1-Dec-2016
Citation: Materials Science and Engineering C. Vol.69, (2016), 914-921
Abstract: © 2016 Elsevier B.V. Carbon-based photoluminescent nanodot has currently been one of the promising materials for various applications. The remaining challenges are the carbon sources and the simple synthetic processes that enhance the quantum yield, photostability and biocompatibility of the nanodots. In this work, the synthesis of blue photoluminescent carbon nanodots from limeade via a single-step hydrothermal carbonization process is presented. Lime carbon nanodot (L-CnD), whose the quantum yield exceeding 50% for the 490 nm emission in gram-scale amounts, has the structure of graphene core functionalized with the oxygen functional groups. The micron-sized flake of the as-prepared L-CnD powder exhibits multicolor emission depending on an excitation wavelength. The L-CnDs are demonstrated for rapidly ferric-ion (Fe3 +) detection in water compared to Fe2 +, Cu2 +, Co2 +, Zn2 +, Mn2 + and Ni2 + ions. The photoluminescence quenching of L-CnD solution under UV light is used to distinguish the Fe3 + ions from others by naked eyes as low concentration as 100 μM. Additionally, L-CnDs provide exceptional photostability and biocompatibility for imaging yeast cell morphology. Changes in morphology of living yeast cells, i.e. cell shape variation, and budding, can be observed in a minute-period until more than an hour without the photoluminescent intensity loss.
ISSN: 09284931
Appears in Collections:Scopus 2016-2017

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