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Facile synthesis of BCNO quantum dots with applications for ion detection, chemosensor and fingerprint identification.
- Source :
-
Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy . Oct2018, Vol. 203, p214-221. 8p. - Publication Year :
- 2018
-
Abstract
- Boron carbon oxynitride quantum dots (BCNO QDs) with blue emission were prepared via the template of SBA–15 (a typical mesoporous silica). A modulated photoluminescence sensor was developed based on the different quenching effects of Cu 2+ or Hg 2+ ions on the luminescence intensity of BCNO QDs. The Cu 2+ or Hg 2+ ions have an interaction with BCNO QDs due to the electrons transfer between the BCNO and Cu 2+ or Hg 2+ ions, and the detection limit of Cu 2+ or Hg 2+ ion concentration can be as less as 10 nM. The BCNO–Cr 6+ mixture can be served as a turn–on fluorescent sensor for detecting the ascorbic acid based on the inner filter effect since overlapping of excitation and emission spectra between Cr 6+ ions and BCNO QDs. Moreover, the BCNO QDs can also be applied to fingerprint identification and organic fluorescent films under ultraviolet excitation. [ABSTRACT FROM AUTHOR]
- Subjects :
- *QUANTUM dots
*CHEMORECEPTORS
*HUMAN fingerprints
*LUMINESCENCE
*EXCITATION spectrum
Subjects
Details
- Language :
- English
- ISSN :
- 13861425
- Volume :
- 203
- Database :
- Academic Search Index
- Journal :
- Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy
- Publication Type :
- Academic Journal
- Accession number :
- 130303583
- Full Text :
- https://doi.org/10.1016/j.saa.2018.05.099