Open AccessControllable synthesis and optical properties of SnO 2 core‐shell microspheres
Author(s) -
Chen Haitao,
Zhang Dan,
Chen Guoshuai,
Zhu Jun,
Chen Xiaobing,
Zeng Xianghua
Publication year - 2014
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2013.0717
Subject(s) - hexamethylenetetramine , photoluminescence , kirkendall effect , materials science , transmission electron microscopy , scanning electron microscope , shell (structure) , raman spectroscopy , chemical engineering , nanotechnology , core (optical fiber) , inner core , composite material , optics , optoelectronics , metallurgy , physics , engineering
SnO 2 core‐shell microspheres were synthesised via a hydrothermal method with hexamethylenetetramine as a surfactant. The structure and the morphology of the products were characterised by X‐ray diffraction, field‐emission scanning electron microscopy and transmission electron microscopy. The results indicated that the overall dimension of the core‐shell microspheres and the diameter of the spherical nuclei could be adjusted by changing the concentration of NaOH and hexamethylenetetramine or the reaction time. Based on the time dependent reactions, a possible growth mechanism is proposed. It is believed that the Kirkendall effect plays an important role in the formation of the core‐shell structure. The optical properties of the core‐shell structure microspheres were also studied through the photoluminescence and the Raman spectra.