| Title | Direct observation of distinct nucleation and growth processes in electrochemically deposited ZnO nanostructures using in situ XANES |
| Publication Type | Journal Article |
| Year of Publication | 2008 |
| Authors | Ingham, B., Illy B.N., and Ryan M.P. |
| Journal | Journal of Physical Chemistry C |
| Volume | 112 |
| Issue | 8 |
| Pagination | 2820 - 2824 |
| Date Published | 2008 |
| ISSN | 19327447 (ISSN) |
| Keywords | Coalescence, Deposition potentials, Nanorods, Nanostructured materials, Nucleation, Solutions, Transmission measurements, X ray absorption near edge structure spectroscopy, Zinc oxide |
| Abstract | In situ synchrotron X-ray absorption was used to study the nucleation and growth of ZnO nanostructures electrochemically deposited from aqueous solutions. A fixed-energy approach was used, which facilitates faster time resolution for systems that are not amenable to transmission measurements and where species-specific information has so far been elusive. Films formed at low potentials (-0.97 V vs Ag/AgCl) show instantaneous nucleation, continued growth, and coalescence of the nanorods. The resultant film is dense with narrow dispersion of rod diameters. At less negative deposition potentials (-0.77 V vs Ag/AgCl), the nucleation is more protracted, resulting in a polydispersed film. In this higher potential region, the growth rates are slower, and there is less evidence of coalescence in the deposited structures, with continued growth along the c-axis only. © 2008 American Chemical Society. |
| URL | http://www.scopus.com/inward/record.url?eid=2-s2.0-40549102797&partnerID=40&md5=37b714c2a29da253568d236035c34bb0 |
| DOI | 10.1021/jp075775+ |
