Micropencils and microhexagonal cones of ZnO

The Journal of Physical Chemistry. B
Niranjan S RamgirVijayamohanan K Pillai

Abstract

Shape selective synthesis of ZnO micropencils and microhexagonal cones has been demonstrated using a controlled method of modified vapor deposition. A plausible growth mechanism based on the results of scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetry, and differential thermal analysis is proposed. Our results suggest that growth of micropencil takes place as per the vapor-liquid-solid progression while the microhexagonal cones grow in two steps following a vapor-solid/vapor-liquid-solid mechanism. Moreover, the geometry, the location of substrate and temperature are found to have key roles in governing the morphology. XPS studies clearly demonstrate the presence of Si species as SiO and SiO2, which act as catalysts enabling nucleating sites for ZnO microstructural growth.

References

Nov 13, 2003·Physical Review Letters·Z L WangJ M Zuo
Feb 28, 2004·Science·Xiang Yang KongZhong Lin Wang
May 20, 2004·Journal of the American Chemical Society·Ming YinStephen O'Brien
Aug 18, 2004·Inorganic Chemistry·Xiao-Lin LiYa-Dong Li
Jul 21, 2006·The Journal of Physical Chemistry. B·Niranjan S RamgirKunjukrishna P Vijayamohanan
Dec 29, 2006·Small·Pu Xian Gao, Zhong Lin Wang

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Citations

Oct 23, 2012·ACS Applied Materials & Interfaces·Tamita RakshitSamit K Ray
Jun 29, 2010·Journal of Hazardous Materials·Chunlei RenChangqiong Zhu
Sep 25, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Fangxiao WangJianmin Sun
Feb 20, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Mahima SubhramanniaVijayamohanan K Pillai
May 23, 2018·ACS Applied Materials & Interfaces·Yi-Jiun HuangKung-Hwa Wei
Sep 15, 2006·The Journal of Physical Chemistry. B·Niranjan S RamgirK Vijayamohanan

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