Publication details

2D distribution mapping of quantum dots injected onto filtration paper by laser-induced breakdown spectroscopy

Authors

ŠKARKOVÁ Pavlína NOVOTNÝ Karel LUBAL Přemysl JEBAVÁ Alžběta POŘÍZKA Pavel KLUS Jakub FARKA Zdeněk HRDLIČKA Aleš KAISER Jozef

Type Article in Periodical
Magazine / Source SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
MU Faculty or unit

Faculty of Medicine Faculty of Science Central European Institute of Technology

Citation
WWW http://www.sciencedirect.com/science/article/pii/S058485471730143X
Doi http://dx.doi.org/10.1016/j.sab.2017.03.016
Field Analytic chemistry
Keywords Quantum dots; Laser-induced breakdown spectroscopy; Chemical mapping; Filtration paper; Fluorescence microscopy
Description In this study, the feasibility of Quantum dots (QDs) 2D distribution mapping on the substrate by Laser-Induced Breakdown Spectroscopy (LIBS) was examined. The major objective of this study was to describe phenomena occurring after applying aqueous solutions of QDs onto filtration paper. Especially, the influence of pH and presence of Cu2 + cations in QDs solutions on LIBS signal was investigated. Cadmium Telluride QDs (CdTe QDs) were prepared by formation of nanosized semiconductor particles in so called “one-pot” synthesis. CdTe QDs were capped by glutathione or by 3-mercaptopropionic acid. The technique described in this work allows detection of QDs injected on the selected substrate – filtration paper. Results obtained from LIBS experiments were collated with a comparative method, fluorescence microscopy, which showed variations in the distribution of QDs on the substrate surface and possibilities for quenching. Due to the immediate signal response, relatively simple instrumentation and automatization possibility, LIBS offers promising and fast alternative to other techniques, as it is able to detect also nanoparticles with no visible luminescence.
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