Rapid growth of zinc oxide nanobars in presence of electric field by physical vapor deposition

Abstract

In this contribution, electric field has some effects to increase growth for specific time duration on zinc oxide (ZnO) nanobars. First, the zinc (Zn) thin film has been prepared by 235,000 V/m electric field assisted physical vapor deposition (PVD) at vacuum of 1.33 9 10 -5 mbar. Second, strong electric field of 134,000 V/m has been used in ambient for growing ZnO nanobars in term of the time include 2.5 and 10 h. The performances of the ZnO nanostructure in absence and presence of electric field have been determined by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results of XRD analysis showed that ZnO has a hexagonal bars structure and a strongly preferred (101) orientation which is strongest than without applying electric field. SEM analysis revealed that physical vapored ZnO thin film in presence of electric field are densely packed with uniform morphological, thinner and denser in distribution. Electric field effect for ZnO growth in 2.5 h is better than it in the 2.5 h without electric field but by passing the time the media influence has good power almost as same as electric field. Through this electric field in PVD, the compact and uniform Zn film has been achieved which is less diameter than ordinary PVD method. Finally, we carry out a series of experiments to grow differentorientation ZnO nanobars with less than 100 nm in diameter, which are the time saving process in base of PVD ever reported. Therefore, the significant conclusion in usage electric field is reducing time of growth.Keywords Zn thin film Á Physical vapor deposition (PVD) Á ZnO nanostructure Á Strong electric field Introduction and theoretical frame work

eview on the general technical approaches as an effective ways to fabricate inorganic nanomaterials

“…The development of PVD, such as create highly ionized vapor and high-power laser ablates to from the target of a vapor through cathodic arc and pulsed laser deposition [13][14][15][16] . The growing various inorganic nanostructures such as ZnO nanobars 17 , BN nanotubes 18 , Ga2O3 nanoribbons 19 and aligned TiO2 nanocolumnar layers 20 with PVD expertise have, therefore, been achieved in recent reports (Fig.1). PVD's advantages have emerged in the ability to use almost any type of organic and inorganic coatings on a variety of substrates and surfaces using a wide variety of finishes and, it is more environmentally and technically friendly than traditional coatings such as electroplating and painting.…”

“…SEM images of (a) ZnO nanobars (b), BN nanotubes (TEM inserted), (c) Ga2O3 nanoribbons and (d) aligned TiO2 nanocolumnar layers[17][18][19][20] …”

Improvement of Amorphous Silicon Thin-Film Photovoltaic Cells with Zinc Oxide Nanorods

“…Therefore, ZnO is suitable as an anti-reflective layer material and is rapidly gaining in value [7][8][9][10]. There are many methods that can be used to grow zinc oxide nanostructures, such as using physical deposition, chemical vapor deposition, and vapor-liquid-solid methods [11][12][13]. However, its production process is expensive.…”