Publication detail

UV Tuning of Cadmium Telluride Quantum Dots (CdTe QDs) – Assessed by Spectroscopy and Electrochemistry

NEJDL, L. RICHTERA, L. XHAXHIU, K. KENŠOVÁ, R. KUDR, J. RUTTKAY-NEDECKÝ, B. KYNICKÝ, J. WAWRZAK, D. ADAM, V. KIZEK, R. KOPEL, P.

Original Title

UV Tuning of Cadmium Telluride Quantum Dots (CdTe QDs) – Assessed by Spectroscopy and Electrochemistry

Type

journal article in Web of Science

Language

English

Original Abstract

In this work, the electrochemical analysis (potentiometric stripping analysis – PSA, cyclic voltammetry – CV) and evaluation of fluorescence properties of cadmium telluride quantum dots (CdTe QDs) covered by mercaptosuccinic acid (MSA) were performed. Using CV it was found that average value of ΔE of QDs is lower than 0.059 V and I is in direct correlation with square root of scan rates, therefore it can be assumed that this system represents rather reversible than quasi-reversible process. Further, it was found that nearly 1.4 electrons are exchanged in both cases, which corresponded with expected two-electron transfer. Fluorescence analysis showed that UV radiation (254 and 312 nm) significantly changes fluorescence properties of CdTe QDs in time 0 – 60 min. It was found that after 5 min of UV irradiation (λ = 312 nm) the fluorescence intensity increased by 37% and at λ = 254 nm the increase in fluorescence intensity was even higher, by 45% (compared to the control without irradiation). UV radiation also caused a shift in the emission maximum of CdTe QDs in range 2 – 70 nm. This work opens up new ways for tuning the optical properties of QDs.

Keywords

Cyclic voltammetry; Fluorescence analysis; Nanoparticles; Potentiometric stripping analysis; Quantum dots; Synthesis; UV radiation; UV tuning

Authors

NEJDL, L.; RICHTERA, L.; XHAXHIU, K.; KENŠOVÁ, R.; KUDR, J.; RUTTKAY-NEDECKÝ, B.; KYNICKÝ, J.; WAWRZAK, D.; ADAM, V.; KIZEK, R.; KOPEL, P.

Released

1. 1. 2016

Publisher

ESG

ISBN

1452-3981

Periodical

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE

Year of study

11

Number

1

State

Republic of Serbia

Pages from

175

Pages to

188

Pages count

14

URL

http://www.electrochemsci.org/papers/vol11/110100175.pdf

Full text in the Digital Library

http://hdl.handle.net/11012/204344

BibTex

@article{BUT128493,
  author="Lukáš {Nejdl} and Lukáš {Richtera} and Kledi {Xhaxhiu} and Renáta {Kenšová} and Jiří {Kudr} and Branislav {Ruttkay-Nedecký} and Jindřich {Kynický} and Dorota {Wawrzak} and Vojtěch {Adam} and René {Kizek} and Pavel {Kopel}",
  title="UV Tuning of Cadmium Telluride Quantum Dots (CdTe QDs) – Assessed by Spectroscopy and Electrochemistry",
  journal="INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE",
  year="2016",
  volume="11",
  number="1",
  pages="175--188",
  issn="1452-3981",
  url="http://www.electrochemsci.org/papers/vol11/110100175.pdf"
}