Publication detail

Characterization of carbon dots covered with polyvinylpyrrolidone and polyethylene glycol

KUDR, J. RICHTERA, L. NEJDL, L. BLAŽKOVÁ, I. MILOSAVLJEVIĆ, V. MORAVEC, Z. WAWRZAK, D. KOPEL, P. RUTTKAY-NEDECKÝ, B. ADAM, V. KIZEK, R.

Original Title

Characterization of carbon dots covered with polyvinylpyrrolidone and polyethylene glycol

Type

journal article in Web of Science

Language

English

Original Abstract

Luminescent carbon dots are new type of nanomaterial with possible applications in labelling and imaging due to their optoelectronic properties and their superior biocompatibility. The aim of this study was to synthetize two types of C-dots with different polymeric surface modification and to characterize them. Thermal method was used to prepare C-dots with surface stabilization with polyvinylpyrrolidone and polyethylene glycol. Several optical and electrochemical methods were used to characterize the particles. It was found that C-dots-PEG (3 ± 2 nm) possess stronger emission than C-dots-PVP (9 ± 3 nm) within the whole range of excitation wavelengths from 230 to 390 nm. Nevertheless in both cases the portion of C-dots created fluorescent micro-sized particles. Electrochemical impedance spectroscopy revealed that the electrode modified with both types of C-dots significantly increased resistance of bare glassy carbon electrode (C-dots-PVP 34-times and C-dots-PEG 141-times). In addition, it was found that pure polymers and C-dots also exhibit complex concentration dependent behaviour in Brdicka solution measured using hanging mercury drop electrode, whereas low amount added resulted in Co(II) peak (-1.3 V) shift and further resulted in three unresolved peak evolution between -0.5 and -0.9 V.

Keywords

Brdicka reaction; carbon dots; nanoparticles; voltammetry; glassy carbon electrode

Authors

KUDR, J.; RICHTERA, L.; NEJDL, L.; BLAŽKOVÁ, I.; MILOSAVLJEVIĆ, V.; MORAVEC, Z.; WAWRZAK, D.; KOPEL, P.; RUTTKAY-NEDECKÝ, B.; ADAM, V.; KIZEK, R.

RIV year

2015

Released

1. 10. 2015

Publisher

ESG

ISBN

1452-3981

Periodical

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE

Year of study

10

Number

10

State

Republic of Serbia

Pages from

8243

Pages to

8254

Pages count

12

URL

http://www.electrochemsci.org/papers/vol10/101008243.pdf

Full text in the Digital Library

http://hdl.handle.net/11012/201458

BibTex

@article{BUT123365,
  author="Jiří {Kudr} and Lukáš {Richtera} and Lukáš {Nejdl} and Iva {Blažková} and Vedran {Milosavljević} and Zdeněk {Moravec} and Dorota {Wawrzak} and Pavel {Kopel} and Branislav {Ruttkay-Nedecký} and Vojtěch {Adam} and René {Kizek}",
  title="Characterization of carbon dots covered with polyvinylpyrrolidone and polyethylene glycol",
  journal="INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE",
  year="2015",
  volume="10",
  number="10",
  pages="8243--8254",
  issn="1452-3981",
  url="http://www.electrochemsci.org/papers/vol10/101008243.pdf"
}