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Ultrasonic preparation of tungsten disulfide singlelayers and quantum dots
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SYSNO ASEP 0450234 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Ultrasonic preparation of tungsten disulfide singlelayers and quantum dots Author(s) Štengl, Václav (UACH-T) RID, ORCID, SAI
Tolasz, Jakub (UACH-T) RID, ORCID, SAI
Popelková, Daniela (UACH-T) SAISource Title RSC Advances. - : Royal Society of Chemistry
Roč. 5, č. 109 (2015), s. 89612-89620Number of pages 9 s. Language eng - English Country GB - United Kingdom Keywords Ethylene glycol ; Nanocrystals ; Photoluminescence spectroscopy Subject RIV CA - Inorganic Chemistry R&D Projects GA14-05146S GA ČR - Czech Science Foundation (CSF) Institutional support UACH-T - RVO:61388980 UT WOS 000364047900033 EID SCOPUS 84946060449 DOI 10.1039/c5ra18886e Annotation Natural raw mineral tungstenite (WS2) was exfoliated to single-layer sheets using high intensity ultrasound. Exfoliation of bulk layered materials, such as WS2 by ultrasound is an attractive way to a largescale preparation of mono- or few-layered crystals. To evaluate the quality of delamination, X-ray diffraction, Raman spectroscopy and microscopic techniques (TEM and AFM) were employed. The obtained exfoliated product served as a precursor for quantum dot preparation using simple refluxing in ethylene glycol. The synthesized WS2 quantum dots were characterized by photoluminescence spectroscopy and AFM microscopy. Exfoliated WS2 can thus join the group of similarly prepared single-layers of MoS2 or graphene. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2016
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