@article{hyde_scarel_spagnola_peng_lee_gong_roberts_roth_hanson_devine_et al._2010, title={Atomic Layer Deposition and Abrupt Wetting Transitions on Nonwoven Polypropylene and Woven Cotton Fabrics}, volume={26}, ISSN={["0743-7463"]}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000274342200056&KeyUID=WOS:000274342200056}, DOI={10.1021/la902830d}, abstractNote={Atomic layer deposition (ALD) of aluminum oxide on nonwoven polypropylene and woven cotton fabric materials can be used to transform and control fiber surface wetting properties. Infrared analysis shows that ALD can produce a uniform coating throughout the nonwoven polypropylene fiber matrix, and the amount of coating can be controlled by the number of ALD cycles. Upon coating by ALD aluminum oxide, nonwetting hydrophobic polypropylene fibers transition to either a metastable hydrophobic or a fully wetting hydrophilic state, consistent with well-known Cassie-Baxter and Wenzel models of surface wetting of roughened surfaces. The observed nonwetting/wetting transition depends on ALD process variables such as the number of ALD coating cycles and deposition temperature. Cotton fabrics coated with ALD aluminum oxide at moderate temperatures were also observed to transition from a natural wetting state to a metastable hydrophobic state and back to wetting depending on the number of ALD cycles. The transitions on cotton appear to be less sensitive to deposition temperature. The results provide insight into the effect of ALD film growth mechanisms on hydrophobic and hydrophilic polymers and fibrous structures. The ability to adjust and control surface energy, surface reactivity, and wettability of polymer and natural fiber systems using atomic layer deposition may enable a wide range of new applications for functional fiber-based systems.}, number={4}, journal={LANGMUIR}, author={Hyde, G. Kevin and Scarel, Giovanna and Spagnola, Joseph C. and Peng, Qing and Lee, Kyoungmi and Gong, Bo and Roberts, Kim G. and Roth, Kelly M. and Hanson, Christopher A. and Devine, Christina K. and et al.}, year={2010}, month={Feb}, pages={2550–2558} }
 @article{gittard_hojo_hyde_scarel_narayan_parsons_2009, title={Antifungal Textiles Formed Using Silver Deposition in Supercritical Carbon Dioxide}, volume={19}, ISSN={1059-9495 1544-1024}, url={http://dx.doi.org/10.1007/s11665-009-9514-7}, DOI={10.1007/s11665-009-9514-7}, number={3}, journal={Journal of Materials Engineering and Performance}, publisher={Springer Science and Business Media LLC}, author={Gittard, Shaun D. and Hojo, Daisuke and Hyde, G. Kevin and Scarel, Giovanna and Narayan, Roger J. and Parsons, Gregory N.}, year={2009}, month={Jul}, pages={368–373} }
 @article{scarel_hyde_hojo_parsons_2008, title={Berreman effect in infrared absorption spectroscopy of ionic oxide coatings formed by atomic layer deposition on three-dimensional structures}, volume={104}, ISSN={["1089-7550"]}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000260941700110&KeyUID=WOS:000260941700110}, DOI={10.1063/1.3013439}, abstractNote={We show through modeling and experimentation that the Berreman effect, physically manifested and investigated on planar surfaces for more than four decades, can be readily realized and studied in three-dimensional nonplanar structures. The Berreman effect is also used as a nonlocal probe to evaluate topography and homogeneity of insulating ionic oxide layers in nonplanar geometries. During infrared transmission studies the macroscopic angular dependence of the longitudinal optical mode absorbance deviates from that observed in the planar case, and the angular dependence is shown to be physically linked to geometry and homogeneity of the ionic oxide layer. Spectroscopic modeling confirms the observations on the angular dependence of longitudinal optical mode absorbance on various nonplanar systems. A linear combination of [sin(θ)]4 with appropriate coefficients is found to describe the trend of longitudinal optical mode absorbance in nonplanar structures.}, number={9}, journal={JOURNAL OF APPLIED PHYSICS}, author={Scarel, Giovanna and Hyde, G. Kevin and Hojo, Daisuke and Parsons, Gregory N.}, year={2008}, month={Nov} }
 @article{peng_hojo_park_parsons_2008, title={Low temperature metal oxide film deposition and reaction kinetics in supercritical carbon dioxide}, volume={516}, ISSN={["0040-6090"]}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000256509100054&KeyUID=WOS:000256509100054}, DOI={10.1016/j.tsf.2007.10.057}, abstractNote={An effective method is developed for low temperature metal oxide deposition through thermal decomposition of metal diketonates in supercritical carbon dioxide (scCO2) solvent. The rates of Al(acac)3 (Aluminum acetyl acetonate) and Ga(acac)3 (Gallium acetyl acetonate) thermal decomposition in scCO2 to form conformal Al2O3 and Ga2O3 thin films on planar surfaces were investigated. The thermal decomposition reaction of Al(acac)3 and Ga(acac)3 was found to be initialized at ∼ 150 °C and 160 °C respectively in scCO2 solvent, compared to ∼ 250 °C and 360 °C in analogous vacuum-based processes. By measuring the temperature dependence of the growth rates of metal oxide thin films, the apparent activation energy for the thermal decomposition of Al(acac)3 in scCO2 is found to be 68 ± 6 kJ/mol, in comparison with 80–100 kJ/mol observed for the corresponding vacuum-based thermal decomposition reaction. The enhanced thermal decomposition rate in scCO2 is ascribed to the high density solvent which effectively reduces the energy of the polar transition states in the reaction pathway. Preliminary results of thin film deposition of other metal oxides including ZrOx, FeOx, Co2O3, Cr2O3, HfOx from thermal decomposition of metal diketonates or fluorinated diketonates in scCO2 are also presented.}, number={15}, journal={THIN SOLID FILMS}, author={Peng, Qing and Hojo, Daisuke and Park, Kie Jin and Parsons, Gregory N.}, year={2008}, month={Jun}, pages={4997–5003} }
 @article{hojo_tokuda_yamabe_2007, title={Direct observation of two-dimensional growth at SiO2/Si(111) interface}, volume={515}, ISSN={["0040-6090"]}, DOI={10.1016/j.tsf.2007.05.011}, abstractNote={Abstract The residue of the two-dimensional (2D) oxide-island growth was directly investigated by observing the morphology change of the SiO2/Si(111) interface with atomic force microscopy, after removing SiO2. It was found that oxidation progressed by the bilayers in the (111) orientation instead of by the monolayers. Oxidation created the oxide-islands in an atomic layer, while the Si-islands were found to exist in the previous atomic layer. This result indicates that thermal oxidation progresses not by a strict layer-by-layer process. Furthermore, the deviation from the layer-by-layer process was increased as the oxidation temperature was decreased. This morphology degradation at low-oxidation temperatures (}, number={20-21}, journal={THIN SOLID FILMS}, author={Hojo, Daisuke and Tokuda, Norio and Yamabe, Kikuo}, year={2007}, month={Jul}, pages={7892–7898} }