TY - JOUR
T1 - Changes in dewetting behavior of SiO2 films on TiO2 substrates due to film thickness and crucible choice
AU - Riesterer, Jessica L.
AU - Barry Carter, C.
N1 - Funding Information:
Acknowledgements The authors would like to thank the University of Connecticut and the 3M Harry Heltzer Endowed Multidisciplinary Chair at the University of Minnesota for funding part of this work. Thanks are due to Dr. Christopher R. Perrey for his help with TEM and EDS and to Dr. Shelley R. Gilliss, Prof. N. (Ravi) Ravishankar, and Dr. William M. Mook for many thought-provoking discussions.
PY - 2011/6
Y1 - 2011/6
N2 - The TiO2/SiO2 materials system has had renewed interest in recent years due to its photoelectric and photocatalytic properties, and serves as an ideal model system for liquid-phase sintering studies (LPS). In this study, glass SiO2 films of three different nanoscale thicknesses were deposited onto (001) rutile TiO2 substrates. The resulting dewet patterns of the glass were found to change depending on the initial film thickness when subjected to identical annealing conditions. In addition, changing the crucible type from Pt to Al2O3, caused films of the same thickness to undergo different convection mechanisms and thus developing very different surface patterns. It is proposed that Marangoni convection drove pattern formation when a Pt crucible was used, while the Rayleigh instability was responsible for dewetting when an Al 2O3 crucible was used.
AB - The TiO2/SiO2 materials system has had renewed interest in recent years due to its photoelectric and photocatalytic properties, and serves as an ideal model system for liquid-phase sintering studies (LPS). In this study, glass SiO2 films of three different nanoscale thicknesses were deposited onto (001) rutile TiO2 substrates. The resulting dewet patterns of the glass were found to change depending on the initial film thickness when subjected to identical annealing conditions. In addition, changing the crucible type from Pt to Al2O3, caused films of the same thickness to undergo different convection mechanisms and thus developing very different surface patterns. It is proposed that Marangoni convection drove pattern formation when a Pt crucible was used, while the Rayleigh instability was responsible for dewetting when an Al 2O3 crucible was used.
UR - http://www.scopus.com/inward/record.url?scp=79953796694&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79953796694&partnerID=8YFLogxK
U2 - 10.1007/s10853-011-5353-7
DO - 10.1007/s10853-011-5353-7
M3 - Article
AN - SCOPUS:79953796694
SN - 0022-2461
VL - 46
SP - 4397
EP - 4406
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 12
ER -