合成多壁碳纳米管/硫化锌异质结构的简便方法：光学和电学性质

Facile route to synthesize multiwalled carbon nanotube/zinc sulfide heterostructures: optical and electrical properties.

作者信息

Du Jimin, Fu Lei, Liu Zhimin, Han Buxing, Li Zhonghao, Liu Yunqi, Sun Zhenyu, Zhu Daoben

机构信息

Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China.

出版信息

J Phys Chem B. 2005 Jul 7;109(26):12772-6. doi: 10.1021/jp051284i.

DOI:10.1021/jp051284i

PMID:16852583

Abstract

A simple method to decorate the multiwalled carbon nanotubes (MWCNTs) with ZnS nanospheres has been developed. The method involves ultrasonic pretreatment and heat treatments of MWCNTs, zinc chloride, and thiourea in ethanol. The heterostructures have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Comparative experiments show that both ultrasonic treatment and heat treatment are necessary for synthesizing the MWCNTs/ZnS heterostructures. Moreover, a photoluminescence spectrum shows that the MWCNTs/ZnS heterostructures feature a broad blue emission at about 430 nm, indicating that there exists significant ground-state interaction between ZnS nanospheres and MWCNTs. Meanwhile, the current-voltage characteristic of the MWCNTs/ZnS exhibits clear rectifying behavior, revealing charge transfer between MWCNTs and ZnS nanospheres.

摘要

已开发出一种用硫化锌纳米球修饰多壁碳纳米管（MWCNT）的简单方法。该方法包括对多壁碳纳米管、氯化锌和硫脲在乙醇中进行超声预处理和热处理。通过X射线衍射（XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对异质结构进行了表征。对比实验表明，超声处理和热处理对于合成多壁碳纳米管/硫化锌异质结构都是必要的。此外，光致发光光谱表明，多壁碳纳米管/硫化锌异质结构在约430nm处有宽的蓝色发射，这表明硫化锌纳米球与多壁碳纳米管之间存在显著的基态相互作用。同时，多壁碳纳米管/硫化锌的电流-电压特性表现出明显的整流行为，揭示了多壁碳纳米管与硫化锌纳米球之间的电荷转移。