Characterization of CdTe nanocrystals during their synthesis in liquid paraffin: optical properties and particle growth

Autor:	Georgi Yordanov, Ceco D. Dushkin, Hideyuki Yoshimura
Rok vydání:	2010
Předmět:	Materials science Mechanical Engineering Liquid paraffin Analytical chemistry Energy-dispersive X-ray spectroscopy Nucleation Fluorescence spectroscopy Absorbance chemistry.chemical_compound Nanocrystal chemistry Mechanics of Materials Telluride General Materials Science Powder diffraction
Zdroj:	Journal of Materials Science. 46:2338-2344
ISSN:	1573-4803 0022-2461
DOI:	10.1007/s10853-010-5079-y
Popis:	This article presents a systematic investigation of the optical properties and the growth process of CdTe nanocrystals during their hot-injection-based synthesis in liquid paraffin. Cadmium(II) stearate and tributylphosphine telluride are used as precursors. The as-obtained nanocrystals are characterized by transmission electron microscopy (TEM) with energy dispersive spectroscopy (EDS), X-ray powder diffraction (XRD), UV–vis absorbance, and fluorescence spectroscopy. The changes in optical absorbance and fluorescence during the nanocrystal synthesis are studied. The average nanocrystal size and the mean nanocrystal concentration are derived from the optical spectra and their changes during the synthesis are investigated. It is found that synthesis at lower temperature (150 °C) favors the continuous nucleation and leads to the formation of relatively smaller nanocrystals (~3 nm in size), whereas the nanocrystal concentration is relatively constant during synthesis at higher temperature (250 °C) thus leading to the formation of larger nanocrystals (~5 nm in size).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2d14d2e7a750a65c447eb476fc329c3b https://doi.org/10.1007/s10853-010-5079-y Zobrazit plný text záznamu Full text from SpringerLink