Nanostructured ZnO films in forms of rod, plate and flower: Electrodeposition mechanisms and characterization

KICIR N., TÜKEN T., Erken O., GÜMÜŞ C., UFUKTEPE Y.

APPLIED SURFACE SCIENCE, vol.377, pp.191-199, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 377
  • Publication Date: 2016
  • Doi Number: 10.1016/j.apsusc.2016.03.111
  • Journal Name: APPLIED SURFACE SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.191-199
  • Keywords: ZnO nanostructures, Electrodeposition, Growth mechanism, Surface morphology, Electronic properties, XPS, NANOROD ARRAYS, GROWTH-MECHANISM, THIN-FILMS, MORPHOLOGY EVOLUTION, COATED GLASS, ZINC-OXIDE, DEPOSITION, TEMPERATURE, NANOWIRES, XPS
  • Çukurova University Affiliated: Yes

Abstract

tUniformity and reproducibility of well-defined ZnO nanostructures are particularly important issues forfabrication and applications of these nanomaterials. In present study, we report selective morphologycontrol during electrodeposition, by adjusting the hydroxyl generation rate and Zn(OH)2deposition.In presence of remarkably high chloride concentration (0.3 M) and −1.0 V deposition potential, slowprecipitation conditions were provided in 5 mM Zn(NO3)2solution. By doing so, we have obtained highlyordered, vertically aligned and uniformly spaced hexagon shaped nanoplates, on ITO surface. We have alsoinvestigated the mechanism for shifting the morphology from rod/plate to flower like structure of ZnO, forbetter understanding the reproducibility. For this reason, the influence of various supporting electrolytes(sodium/ammonium salts of acetate) has been investigated for interpretation of the influence of OH−concentration nearby the surface. From rod to plate and flower nanostructures, X-ray photoelectronspectroscopy (XPS) and X-ray diffraction (XRD) analysis were realized for characterization, also the opticalproperties were studied.

Uniformity and reproducibility of well-defined ZnO nanostructures are particularly important issues for fabrication and applications of these nanomaterials. In present study, we report selective morphology control during electrodeposition, by adjusting the hydroxyl generation rate and Zn(OH)(2) deposition. In presence of remarkably high chloride concentration (0.3M) and -1.0V deposition potential, slow precipitation conditions were provided in 5 mM Zn(NO3)(2) solution. By doing so, we have obtained highly ordered, vertically aligned and uniformly spaced hexagon shaped nanoplates, on ITO surface. We have also investigated the mechanism for shifting the morphology from rod/plate to flower like structure of ZnO, for better understanding the reproducibility. For this reason, the influence of various supporting electrolytes (sodium/ammonium salts of acetate) has been investigated for interpretation of the influence of OH- concentration nearby the surface. From rod to plate and flower nanostructures, X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analysis were realized for characterization, also the optical properties were studied. (C) 2016 Elsevier B.V. All rights reserved.