Temperature-controlled synthesis of Zn2GeO4 nanowires in a vapor-liquid-solid mode and their photoluminescence properties

被引：13

作者：

Kim, Hyoun Woo ^{[1
]}

Na, Han Gil ^{[1
]}

Yang, Ju Chan ^{[1
]}

Lee, Chongmu ^{[2
]}

机构：

[1] Hanyang Univ, Div Mat Sci & Engn, Seoul 133791, South Korea

[2] Inha Univ, Sch Mat Sci & Engn, Inchon 402751, South Korea

来源：

CHEMICAL ENGINEERING JOURNAL | 2011年 / 171卷 / 03期

关键词：

Zn2GeO4; Nanowires; Photoluminescence; CATALYZED GROWTH; ZNO; LUMINESCENCE; CRYSTALLINE; CATHODOLUMINESCENCE; DEPOSITION; NANORODS; EMISSION; COPPER; SIO2;

D O I：

10.1016/j.cej.2011.04.010

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Varying the heating temperature of a mixture of Zn and Ge powders, we have successfully prepared Zn2GeO4 nanowires. We suggest that the 900 degrees C-grown product was mainly grown via a vapor-liquid-solid process, whereas the 800 degrees C-grown product was dominated by a vapor-solid mechanism. For 900 degrees C-grown nanowires, the stem is mainly comprised rhombohedral Zn2GeO4 phase, whereas the tip is characterized by a particle hexagonal GeO2 phase. For 800 degrees C-grown nanowires, both the stem and tip are mainly comprised hexagonal ZnO phase with some additional Zn2GeO4 phase. It was observed that variation of the growth temperature affected the photoluminescence spectra of the nanowires, leading to an overall intensification. We have discussed the possible mechanisms for the observed temperature-induced changes in the PL spectra. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1439 / 1445

页数：7

共 32 条

[1] SURFACE EFFECTS ON LOW-ENERGY CATHODOLUMINESCENCE OF ZINC-OXIDE [J].