Preparation of graphene quantum dots through liquid phase exfoliation method

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F18%3A43914077" target="_blank" >RIV/62156489:43210/18:43914077 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26310/18:PU128626

Výsledek na webu

<a href="https://doi.org/10.1016/j.jlumin.2018.08.017" target="_blank" >https://doi.org/10.1016/j.jlumin.2018.08.017</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jlumin.2018.08.017" target="_blank" >10.1016/j.jlumin.2018.08.017</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Preparation of graphene quantum dots through liquid phase exfoliation method

Popis výsledku v původním jazyce

Here we report the preparation of low defect blue fluorescent graphene quantum dots (GQDs) through microwave expansion and liquid phase exfoliation (LPE) of graphite flakes with a high preparation yield of 0.63 g of GQDs per 1 g of original graphite substrate. The maximum emission in the prepared GQDs occurs at 467 nm for 370 nm excitation. The photoluminescence quantum yield of the prepared GQDs was measured as 3.4%. Prepared GQDs are composed of carbon, oxygen and nitrogen elements. They have high percentage (86%) of C-C/C = C, indicating few structural defects of the graphitic core, due to lesser number of edge- or surface-located oxygenated functional groups. This preparation technique, unlike others, does not require additional chemical components and is energetically undemanding. Furthermore, the reported method is also suitable for scalable preparation of quantum structures from other two-dimensional layered materials.

Název v anglickém jazyce

Preparation of graphene quantum dots through liquid phase exfoliation method

Popis výsledku anglicky

Here we report the preparation of low defect blue fluorescent graphene quantum dots (GQDs) through microwave expansion and liquid phase exfoliation (LPE) of graphite flakes with a high preparation yield of 0.63 g of GQDs per 1 g of original graphite substrate. The maximum emission in the prepared GQDs occurs at 467 nm for 370 nm excitation. The photoluminescence quantum yield of the prepared GQDs was measured as 3.4%. Prepared GQDs are composed of carbon, oxygen and nitrogen elements. They have high percentage (86%) of C-C/C = C, indicating few structural defects of the graphitic core, due to lesser number of edge- or surface-located oxygenated functional groups. This preparation technique, unlike others, does not require additional chemical components and is energetically undemanding. Furthermore, the reported method is also suitable for scalable preparation of quantum structures from other two-dimensional layered materials.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Luminescence

ISSN

0022-2313

e-ISSN

—

Svazek periodika

204

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

203-208

Kód UT WoS článku

000445668900032

EID výsledku v databázi Scopus

2-s2.0-85051407155