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