TY - JOUR
T1 - Morphology evolution in spinel manganite films deposited from an aqueous solution
AU - Ko, Song Won
AU - Li, Jing
AU - Trolier-Mckinstry, Susan
N1 - Funding Information:
This research was sponsored by the U.S. Army Research Office and U.S. Army Research Laboratory under Cooperative Agreement Number W911NF-0-2-0026 . The authors would like to especially thank Dr. James Adair in the Department of Materials Science and Engineering in Pennsylvania State University for valuable discussions.
PY - 2012/11/1
Y1 - 2012/11/1
N2 - Spinel manganite films were deposited by the spin spray technique at low deposition temperatures (< 100 °C). It was found that the film microstructure depends strongly on the degree of supersaturation (S) of the cations in the aqueous solution. For S < 2, well-crystallized isolated particles were deposited on the substrate, suggesting that heterogeneous nucleation with a low nucleation density dominates under these conditions. For 10 < S < 200, the as-grown films were continuous, with some porosity confirmed by transmission electron microscopy (TEM); the films could be densified by post-deposition annealing at 400 °C for 1 h. As-deposited films under these conditions were X-ray amorphous but the nanocrystalline spinel phase was confirmed by TEM. In this region, both homogeneous and heterogeneous nucleation occur. For S > 1000, agglomeration of small particles was dominant, which suggests that homogeneous nucleation is dominant during deposition. Heterogeneous nucleation was critical to obtain dense films.
AB - Spinel manganite films were deposited by the spin spray technique at low deposition temperatures (< 100 °C). It was found that the film microstructure depends strongly on the degree of supersaturation (S) of the cations in the aqueous solution. For S < 2, well-crystallized isolated particles were deposited on the substrate, suggesting that heterogeneous nucleation with a low nucleation density dominates under these conditions. For 10 < S < 200, the as-grown films were continuous, with some porosity confirmed by transmission electron microscopy (TEM); the films could be densified by post-deposition annealing at 400 °C for 1 h. As-deposited films under these conditions were X-ray amorphous but the nanocrystalline spinel phase was confirmed by TEM. In this region, both homogeneous and heterogeneous nucleation occur. For S > 1000, agglomeration of small particles was dominant, which suggests that homogeneous nucleation is dominant during deposition. Heterogeneous nucleation was critical to obtain dense films.
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U2 - 10.1016/j.tsf.2012.08.047
DO - 10.1016/j.tsf.2012.08.047
M3 - Article
AN - SCOPUS:84868591120
SN - 0040-6090
VL - 522
SP - 129
EP - 135
JO - Thin Solid Films
JF - Thin Solid Films
ER -