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Journal of Nanomaterials
Volume 2017, Article ID 7029731, 10 pages
Research Article

Water Soluble Fluorescent Carbon Nanodots from Biosource for Cells Imaging

1Department of Bionanotechnology, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 461-701, Republic of Korea
2School of Chemical Engineering, The University of Adelaide, 5005 North Terrace, Adelaide, SA, Australia

Correspondence should be addressed to TaeYoung Kim;

Received 19 September 2016; Accepted 28 November 2016; Published 4 January 2017

Academic Editor: Rajesh R. Naik

Copyright © 2017 Kumud Malika Tripathi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Carbon nanodots (CNDs) derived from a green precursor, kidney beans, was synthesized with high yield via a facile pyrolysis technique. The CND material was easily modified through simple oxidative treatment with nitric acid, leading to a high density “self-passivated” water soluble form (wsCNDs). The synthesized wsCNDs have been extensively characterized by using various microscopic and spectroscopic techniques and were crystalline in nature. The highly carboxylated wsCNDs possessed tunable-photoluminescence emission behavior throughout the visible region of the spectrum, demonstrating their application for multicolor cellular imaging of HeLa cells. The tunable-photoluminescence properties of “self-passivated” wsCNDs make them a promising candidate as a probe in biological cell-imaging applications.