Synthesis, field emission of various ZnSe nanostructures by hydrothermal methods

Synthesis, field emission of various ZnSe nanostructures by hydrothermal methods

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In this work, grass-like, needle-like and chrysanthemum-like ZnSe nanostructures have been prepared by hydrothermal method at 200°C for 24 h successfully. With different amounts of diethanolamine, various morphologies of ZnSe formed. The structures, morphologies and crystal orientation of as-synthesised ZnSe nanostructures were characterised by X-ray diffractometer (XRD) and scanning electron microscope. The experiment result of XRD indicated that the structures of all as-synthesised ZnSe nanomaterials were cubic crystal. The field emission (FE) properties of as-synthesised samples were tested and the results revealed that the FE properties were influenced by the morphologies significantly. The FE measurement showed that the chrysanthemum-like ZnSe nanostructures had the best FE properties with a high field enhancement factor of 4328 and a low turn-on electric field of 3.4 V μm−1 among all the as-synthesised ZnSe nanostructures. The reaction mechanism of various morphologies ZnSe was also explained as follow.


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      • 9. Azam, S., Masoud, S.N.: ‘Optimized synthesis of ZnSe nanocrystals by hydrothermal method’, J. Mater. Sci., 2016, 27, (1), pp. 293303.
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      • 12. Li, X.Y., Wei, B., Wang, J., et al: ‘Fabrication and comparison of the photocatalytic activity of ZnSe microflowers and nanosheets’, J. Mater. Sci., 2015, 26, (11), pp. 84848488.
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