Direct Observation of Distinct Nucleation And Growth Processes in Electrochemically Deposited ZnO Nanostructures Using in Situ XANES
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.
- Research Organization:
- Stanford Linear Accelerator Center (SLAC)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 958646
- Report Number(s):
- SLAC-REPRINT-2009-043
- Journal Information:
- J.Phys.Chem.C112:2820-2824,2008, Journal Name: J.Phys.Chem.C112:2820-2824,2008 Journal Issue: 8 Vol. 112; ISSN 1932-7447
- Country of Publication:
- United States
- Language:
- English
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