Detail publikace

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.

Originální název

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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

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

Vydáno

1. 1. 2016

Nakladatel

ESG

ISSN

1452-3981

Periodikum

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE

Ročník

11

Číslo

1

Stát

Srbská republika

Strany od

175

Strany do

188

Strany počet

14

URL

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

Plný text v Digitální knihovně

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"
}