期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 221, 期 -, 页码 418-425出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2014.09.039
关键词
Polyoxometalate; Chemical solution deposition; Structural characterization; Thin film formation mechanism
资金
- National Science Foundation [CHE-1102637]
- U.S. Department of Energy [DE-AC02-06CH11357]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1102637] Funding Source: National Science Foundation
Aqueous precursors tailored for the deposition of thin film materials are desirable for sustainable, simple, low energy production of advanced materials. Yet the simple practice of using aqueous precursors is complicated by the multitude of interactions that occur between ions and water during dehydration. Here we use lithium polyoxoniobate salts to investigate the fundamental interactions in the transition from precursor cluster to oxide film. Small-angle X-ray scattering of solutions, total X-ray scattering of intermediate gels, and morphological and structural characterization of the lithium niobate thin films reveal the atomic level transitions between these states. The studies show that (1) lithium-[H2Nb6O19](6-) has drastically different solution behaviour than lithium-[Nb6O19](8-), linked to the precursor salt structure (2) in both compositions, the intermediate gel preserves the polyoxoniobate clusters and show similar local order and (3) the morphology and phases of deposited films reflect the ions behaviour throughout the journey from cluster solution to metal oxide. (C) 2014 Elsevier Inc. All rights reserved.
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