Synthesis and Fluorescence Property of Mn‐Doped ZnSe Nanowires

Dongmei Han,Chunfeng Song,Xiaoyu Li

doi:10.1155/2010/290763

Dongmei Han, Chunfeng Song + Show 1 more

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https://doi.org/10.1155/2010/290763

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Abstract

Water‐soluble Mn‐doped ZnSe luminescent nanowires were successfully prepared by hydrothermal method without any heavy metal ions and toxic reagents. The morphology, composition, and property of the products were investigated. The experimental results showed that the Mn‐doped ZnSe nanowires were single well crystallized and had a zinc blende structure. The average length of the nanowires was about 2‐3 μm, and the diameter was 80 nm. With the increase of Mn2+‐doped concentration, the absorbance peak showed large difference. The UV‐vis absorbance spectrum showed that the Mn‐doped ZnSe nanowires had a sharp absorption band appearing at 360 nm. The PL spectrum revealed that the nanowires had two distinct emission bands centered at 432 and 580 nm.

Highlights

As biomedical labeling reagents, high-quality colloidal luminescent semiconductor nanocrystals, such as CdSe, have attracted much attention because of their apparent, narrow, and symmetric photoluminescence, broad and intense absorption band, and tunable emission peak positions [1, 2]
On the basis of those and other encouraging results [14, 15], we recently focused on the possibilities to synthesize metal ion-doped ZnSe directly in aqueous solution and explored the impact of system on morphology and performance of the nanomaterials
The peaks which are observed at ← 38.0◦and 49.5◦ match those of wurtzite phase [(102) plane] and [(103) plane] because the synthesis process is affected by the introduction of impurity ions Mn2+ into the host lattice which can significantly affect the reaction rate, which is reflected by a reduction in the crystal phase [17]

Summary

Introduction

High-quality colloidal luminescent semiconductor nanocrystals, such as CdSe, have attracted much attention because of their apparent, narrow, and symmetric photoluminescence, broad and intense absorption band, and tunable emission peak positions [1, 2]. The sp-d exchange interaction between the semiconductor and the transition metal ions induces unique optoelectronic properties [3]; Mn-doped II-VI semiconductors arouse general interest in particular, [4,5,6]. Recent researches have been carried out to explore for the synthesis of transition metal ion-doped ZnSe nanocrystals such as Cu−, Mn−, and Co-doped ZnSe nanomaterials. The main method of preparing transition metal ion-doped ZnSe nanomaterials is colloid chemistry route. Nie and his coworkers [13] developed an alternative method to synthesize nanocrystals in aqueous solution. On the basis of those and other encouraging results [14, 15], we recently focused on the possibilities to synthesize metal ion-doped ZnSe directly in aqueous solution and explored the impact of system on morphology and performance of the nanomaterials. We report on the preparation of highcrystalline Mn-doped ZnSe nanowires (NWs) by a simple method, solution synthetic methodology using αcyclodextrins as stabilizer, and investigated the relationship between the structures and the properties

Experimental

Results and Discussion

Conclusion