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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/239950
- Title
- Detection of Sn(II) ions via quenching of the fluorescence of carbon nanodots
- Author(s)
- Yazid, Siti Nur Akmar Mohd; Chin, Suk Fun; Pang, Suh Cem; Ng, Sing Muk
- Abstract
- We report that fluorescent carbon nanodots (C-dots) can act as an optical probe for quantifying Sn(II) ions in aqueous solution. C-dots are synthesized by carbonization and surface oxidation of preformed sago starch nanoparticles. Their fluorescence is significantly quenched by Sn(II) ions, and the effect can be used to determine Sn(II) ions. The highest fluorescence intensity is obtained at a concentration of 1.75 mM of C-dots in aqueous solution. The probe is highly selective and hardly interfered by other ions. The quenching mechanism appears to be predominantly of the static (rather than dynamic) type. Under optimum conditions, there is a linear relationship between fluorescence intensity and Sn(II) ions concentration up to 4 mM, and with a detection limit of 0.36 μM.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Sarawak Campus. School of Engineering, Computing and Science
- Source
- Microchimica Acta, Vol. 180, no. 1-2 (Jan 2013), pp. 137-143
- Publication year
- 2013
- FOR Code(s)
- 0301 Analytical Chemistry; 0399 Other Chemical Sciences
- Keyword(s)
- Carbon nanodots; Fluorescence; Quenching; Sn(II) ions; Starch nanoparticles
- Publisher
- Springer
- ISSN
- 0026-3672
- Publisher URL
- http://dx.doi.org/10.1007/s00604-012-0908-0
- Copyright
- Copyright © Springer-Verlag Wien 2012.
- Additional information
- The authors acknowledge support from the Ministry of Higher Education (MOHE) through Fundamental Research Grant Scheme (FRGS), grant number: 01(17)746/2010(32) and MyBrain15 (MyMaster) program for graduate scholarship.
- Peer reviewed
