Microwave-assisted synthesis of WS2 nanowires through tetrathiotungstate precursors

Autor:	Pravas Kumar Panigrahi and Amita Pathak
Jazyk:	angličtina
Rok vydání:	2008
Předmět:	tungsten disulfide monoethanolamine microwave heating nanowires Materials of engineering and construction. Mechanics of materials TA401-492 Biotechnology TP248.13-248.65
Zdroj:	Science and Technology of Advanced Materials, Vol 9, Iss 4, p 045008 (2008)
Druh dokumentu:	article
ISSN:	1468-6996 1878-5514
Popis:	Tungsten disulfide (WS2) nanowires have been synthesized through a microwave-assisted chemical route that uses tungstic acid, elemental sulfur and monoethanolamine as starting reagents for obtaining a precursor solution of tetrathiotungstate ions. Acidification of the precursor solution yields amorphous precipitates, which lead to the formation of nanowires of WS2 with thickness of about 5–10 nm when heated at 750 °C under argon atmosphere for 1.5 h. Phase and the microstructure of the prepared powders have been investigated through x-ray powder diffraction and high-resolution transmission electron microscopy, respectively. Optical absorption of the WS2 powders reveals a red shift of the exciton bands compared to bulk WS2.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/206edd3089d04756848c8e603e63196c Zobrazit plný text záznamu View record in DOAJ