Synthesis and photoluminescence properties of ZnS nanobowl arrays via colloidal monolayer template.

Yanping Liu,Wenwu Zhong,Weiping Chen,Zhigang Li,Li Zhang,Qintao Li

doi:10.1186/1556-276x-9-389

Abstract

Two-dimensional Zinc sulfide (ZnS) nanobowl arrays were synthesized via self-assembled monolayer polystyrene sphere template floating on precursor solution surface. A facile approach was proposed to investigate the morphology evolution of nanobowl arrays by post-annealing procedure. Photoluminescence (PL) measurement of as-grown nanoarrays shows that the spectrum mainly includes two parts: a purple emission peak at 382 nm and a broad blue emission band centering at 410 nm with a shoulder around 459 nm, and a blue emission band at 440 nm was obtained after the annealing procedure. ZnS nanoarrays with special morphologies and PL emission are benefits to their promising application in novel photoluminescence nanodevice.

Highlights

Two-dimensional (2D) micro- and nanostructured arrays have attracted much interest because of their potential applications in optoelectronic device, gas sensors, solar cell, self-cleaning surface, etc. [1,2,3,4,5]
The monolayer colloidal crystal template (MCCT) was lifted by a silicon substrate and the residual water around the MCCT was absorbed by a filter paper, which was used as a template for synthesizing nanoarrays on the solution surface
It is noted that the height of the nanobowl is slightly larger than the radius of PS spheres (300 nm), indicating that Zinc sulfide (ZnS) nanoparticles were deposited at the upper hemisphere and connected to a circular unit from the top view of SEM (Figure 2d)

Summary

Introduction

Two-dimensional (2D) micro- and nanostructured arrays have attracted much interest because of their potential applications in optoelectronic device, gas sensors, solar cell, self-cleaning surface, etc. [1,2,3,4,5]. Two-dimensional (2D) micro- and nanostructured arrays have attracted much interest because of their potential applications in optoelectronic device, gas sensors, solar cell, self-cleaning surface, etc. The applications and physical properties of 2D nanoarrays are relevant to their morphology. Bowl-like nanostructural arrays can be used in various fields, like nanoscale container and size selection of submicron spheres [6], light emitting diode surface [7], and chemical and biological sensors [8]. The control of nanoarrays' morphology provides opportunities to tune and improve their properties and further promote their practical applications in various fields. Many efforts have been focused on the morphologies control and PL emissions of ZnS nanomaterials [15,16,17,18,19,20]. It was demonstrated that their PL emissions were dominated by defect states, such

Methods

Results

Conclusion