CHARACTERIZATION OF FLUORESCENT CARBON DOTS FOR SENSORS CONCTRUCTION

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F15%3APU126950" target="_blank" >RIV/00216305:26620/15:PU126950 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

CHARACTERIZATION OF FLUORESCENT CARBON DOTS FOR SENSORS CONCTRUCTION

Popis výsledku v původním jazyce

Carbon dots (C-dots) are a new type of nanomaterial broadly used in sensing, imaging and distinct analytical applications. They possess several advantages over classical semiconductor quantum dots like higher biocompatibility and lower toxicity. In this study C-dots were successfully synthesized from citric acid as a carbon source and covered with poly-(ethylene glycol). Since precise nanoparticle characterization represents the key step in nanosensor construction, C-dots were characterized using several methods - UV/vis spectrophotometry, fluorescence spectroscopy, dynamic light scattering and electrochemistry. In C-dots absorption spectra with two local maxima at 280 and 330 nm corresponding to n-pi* and pi-pi* transition were observed. The maximal fluorescence of 2 +/- 0.5 nm sized C-dots were reached using excitation wavelength of 370 nm. The electrochemical analysis of C-dots using HMDE in Brdicka solution suggested, that this method can be used to determine the amount of PEG capping agent on the surface of C-dots nanocrystals.

Název v anglickém jazyce

CHARACTERIZATION OF FLUORESCENT CARBON DOTS FOR SENSORS CONCTRUCTION

Popis výsledku anglicky

Carbon dots (C-dots) are a new type of nanomaterial broadly used in sensing, imaging and distinct analytical applications. They possess several advantages over classical semiconductor quantum dots like higher biocompatibility and lower toxicity. In this study C-dots were successfully synthesized from citric acid as a carbon source and covered with poly-(ethylene glycol). Since precise nanoparticle characterization represents the key step in nanosensor construction, C-dots were characterized using several methods - UV/vis spectrophotometry, fluorescence spectroscopy, dynamic light scattering and electrochemistry. In C-dots absorption spectra with two local maxima at 280 and 330 nm corresponding to n-pi* and pi-pi* transition were observed. The maximal fluorescence of 2 +/- 0.5 nm sized C-dots were reached using excitation wavelength of 370 nm. The electrochemical analysis of C-dots using HMDE in Brdicka solution suggested, that this method can be used to determine the amount of PEG capping agent on the surface of C-dots nanocrystals.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

International Multidisciplinary Scientific GeoConference-SGEM

ISBN

978-619-7105-42-1

ISSN

1314-2704

e-ISSN

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Počet stran výsledku

6

Strana od-do

19-24

Název nakladatele

Neuveden

Místo vydání

Neuveden

Místo konání akce

Albena, Bulharsko

Datum konání akce

18. 6. 2015

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000371601900003