Crystallization at room temperature from amorphous to trigonal selenium as a byproduct of the synthesis of water dispersible zinc selenide

Autor(es)

Pinto, Alexandre Henrique ^[1] ; Leite, Edson Roberto ^[1] ; Longo, Elson ^[2] ; de Camargo, Emerson Rodrigues ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, LIEC, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Estadual Paulista, Inst Quim, BR-14800900 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Letters; v. 87, p. 62-65, NOV 15 2012.
• Citações Web of Science: 7

Resumo

Zinc selenide is a semiconductor material that has been synthesized in aqueous media. However, this synthesis can yield some byproducts, which has been little exploited in literature of this area; one of these byproducts is amorphous selenium. As this amorphous species is unable to be detected through X-ray diffraction, Raman spectroscopy plays an important role in order to track this byproduct. Additionally, the crystallization process from amorphous to trigonal selenium, due to aging at room temperature, was tracked through Raman spectroscopy and transmission electron microscopy. It was observed that, within a period of 5 months, the amorphous selenium was in great part converted to trigonal selenium, which could be deleterious to the properties of the ZnSe quantum dots. (C) 2012 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 10/13735-0 - Síntese de nanopartículas semicondutoras de ZnSe com superfície hidrofílica através de método baseado na Química Verde
• Beneficiário: Alexandre Henrique Pinto
• Modalidade de apoio: Bolsas no Brasil - Mestrado