@article{petrochenko_scarel_hyde_parsons_skoog_zhang_goering_narayan_2013, title={Prevention of Ultraviolet (UV)-Induced Surface Damage and Cytotoxicity of Polyethersulfone Using Atomic Layer Deposition (ALD) Titanium Dioxide}, volume={65}, ISSN={1047-4838 1543-1851}, url={http://dx.doi.org/10.1007/S11837-013-0565-8}, DOI={10.1007/s11837-013-0565-8}, abstractNote={Nanostructured surfaces are finding use in several medical applications, including tissue scaffolds and wound dressings. These surfaces are frequently manufactured from biocompatible polymers that are susceptible to ultraviolet (UV) damage. Polyethersulfone (PES) is a biocompatible polymer that undergoes oxidation and degradation when exposed to ultraviolet (UV) light. A uniform TiO2 coating can protect PES during exposure to UV sources (e.g., germicidal lamps and sunlight). The goal of this study was to determine whether atomic layer deposition (ALD) can successfully be used to grow TiO2 onto PES, protect it from UV irradiation, and reduce macrophage in vitro cytotoxicity. TiO2 was ALD-coated onto PES at 21 nm thickness. Uncoated PES exposed to UV for 30 min visibly changed color, whereas TiO2-coated PES showed no color change, indicating limited degradation. Macrophages exposed to UV-treated PES for 48 h showed reduced cell viability (via MTT assay) to 18% of control. In contrast, the cell viability for UV-treated TiO2-coated PES was 90% of control. Non-UV treated PES showed no decrease in cell viability. The results indicate that ALD of TiO2 thin films is a useful technique to protect polymers from UV damage and to retain low cytotoxicity to macrophages and other types of cells that are involved in wound healing. TiO2- coated PES membranes also have potential use in direct methanol fuel cells and in wastewater treatment membranes.}, number={4}, journal={JOM}, publisher={Springer Science and Business Media LLC}, author={Petrochenko, Peter E. and Scarel, Giovanna and Hyde, G. Kevin and Parsons, Gregory N. and Skoog, Shelby A. and Zhang, Qin and Goering, Peter L. and Narayan, Roger J.}, year={2013}, month={Feb}, pages={550–556} }
 @article{hyde_stewart_scarel_parsons_shih_shih_lin_su_monteiro-riviere_narayan_et al._2011, title={Atomic layer deposition of titanium dioxide on cellulose acetate for enhanced hemostasis}, volume={6}, ISSN={1860-6768}, url={http://dx.doi.org/10.1002/biot.201000342}, DOI={10.1002/biot.201000342}, abstractNote={Abstract}, number={2}, journal={Biotechnology Journal}, publisher={Wiley}, author={Hyde, G. Kevin and Stewart, S. Michael and Scarel, Giovanna and Parsons, Gregory N. and Shih, Chun-Che and Shih, Chun-Ming and Lin, Shing-Jong and Su, Yea-Yang and Monteiro-Riviere, Nancy A. and Narayan, Roger J. and et al.}, year={2011}, month={Feb}, pages={213–223} }
 @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{roth_roberts_hyde_2010, title={Effect of Weave Geometry on Surface Energy Modification of Textile Materials via Atomic Layer Deposition}, volume={80}, ISSN={["0040-5175"]}, DOI={10.1177/0040517510371868}, abstractNote={ Atomic layer deposition (ALD) has recently been demonstrated as a novel method for the creation of nanoscale coatings on fiber-based materials. The ALD process has proven effective in altering the surface energy of both woven and nonwoven materials. In this work, the effect of fabric weave geometry on the behavior of ALDmodified fabrics has been studied. Aluminum oxide ALD was used to modify a series of fabric weaves which were then analyzed using sessile contact angle measurements. The experimental results demonstrated the ability of the ALD process to modify the surface energy of a variety of weave structures, regardless of the inter-fiber spacing within the yarns. At the same time, the amount of fiber spacing, which is influenced by the weave geometry, changes the effect of the ALD coatings on fabric hydrophobicity and hydrophilicity. The results of this work demonstrate the versatility of the ALD process when modifying woven fabric structures and its potential as a method for nanoscale textile finishing. }, number={18}, journal={TEXTILE RESEARCH JOURNAL}, author={Roth, Kelly M. and Roberts, Kim G. and Hyde, G. Kevin}, year={2010}, month={Nov}, pages={1970–1981} }
 @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{hyde_mccullen_jeon_stewart_jeon_loboa_parsons_2009, title={Atomic layer deposition and biocompatibility of titanium nitride nano-coatings on cellulose fiber substrates}, volume={4}, ISSN={["1748-605X"]}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000264935500003&KeyUID=WOS:000264935500003}, DOI={10.1088/1748-6041/4/2/025001}, abstractNote={Atomic layer deposition (ALD) is investigated as a process to produce inorganic metallic bio-adhesive coatings on cellulosic fiber substrates. The atomic layer deposition technique is known to be capable of forming highly conformal and uniform inorganic thin film coatings on a variety of complex surfaces, and this work presents an initial investigation of ALD on porous substrate materials to produce high-precision biocompatible titanium oxynitride coatings. X-ray photoelectron spectroscopy (XPS) confirmed TiNOx composition, and transmission electron microscopy (TEM) analysis showed the coatings to be uniform and conformal on the fiber surfaces. Biocompatibility of the modified structures was determined as a function of coating layer thickness by fluorescent live/dead staining of human adipose-derived adult stem cells (hADSC) at 6, 12 and 24 h. Cell adhesion showed that thin TiNOx coatings yielded the highest number of cells after 24 h with a sample coated with a 20 Å coating having approximately 28.4 ± 3.50 ng DNA. By altering the thickness of the deposited film, it was possible to control the amount of cells adhered to the samples. This work demonstrates the potential of low temperature ALD as a surface modification technique to produce biocompatible cellulose and other implant materials.}, number={2}, journal={BIOMEDICAL MATERIALS}, author={Hyde, G. K. and McCullen, S. D. and Jeon, S. and Stewart, S. M. and Jeon, H. and Loboa, E. G. and Parsons, G. N.}, year={2009}, month={Apr} }
 @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{hyde_park_stewart_hinestroza_parsons_2007, title={Atomic layer deposition of Conformal inorganic nanoscale coatings on three-dimensional natural fiber systems: Effect of surface topology on film growth characteristics}, volume={23}, ISSN={["0743-7463"]}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000249241300048&KeyUID=WOS:000249241300048}, DOI={10.1021/la701449t}, abstractNote={Atomic-scale material deposition is utilized to achieve uniform coverage and modification of the surface properties of natural fiber and woven fabric materials, where irregular nanoscale features are embedded in a macroscale interpenetrating fiber network. The complex surface topology of the woven fabric results in significantly different film-growth thickness per ALD cycle as compared to planar surfaces coated using the same process conditions, likely due to reactant adsorption within the fiber starting material, as well as impeded reactant transport out of the fabric system during the purge cycle. Cotton textiles modified with conformal nanoscale Al2O3 are found to show extreme hydrophobic effects, distinctly different from planar surfaces that receive the same coatings. The results highlight key concerns for achieving controlled conformal coatings on complex surfaces and open the possibility for new textile finishing approaches to create novel fabric-based materials with specialized function and performance.}, number={19}, journal={LANGMUIR}, author={Hyde, G. Kevin and Park, Kie Jin and Stewart, S. Michael and Hinestroza, Juan P. and Parsons, Gregory N.}, year={2007}, month={Sep}, pages={9844–9849} }
 @article{peng_sun_spagnola_hyde_spontak_parsons_2007, title={Atomic layer deposition on electrospun polymer fibers as a direct route to Al2O3 microtubes with precise wall thickness control}, volume={7}, ISSN={["1530-6984"]}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000244867400032&KeyUID=WOS:000244867400032}, DOI={10.1021/nl062948i}, abstractNote={Atomic layer deposition (ALD) of Al2O3 on electrospun poly(vinyl alcohol) microfiber templates is demonstrated as an effective and robust strategy by which to fabricate long and uniform metal-oxide microtubes. The wall thickness is shown to be precisely controlled within a molecular layer or so by adjusting the number of ALD cycles utilized. By judicious selection of the electrospinning and ALD parameters, designer tubes of various sizes and inorganic materials can be synthesized.}, number={3}, journal={NANO LETTERS}, author={Peng, Qing and Sun, Xiao-Yu and Spagnola, Joseph C. and Hyde, G. Kevin and Spontak, Richard J. and Parsons, Gregory N.}, year={2007}, month={Mar}, pages={719–722} }
 @article{hyde_dong_hinestroza_2007, title={Effect of surface cationization on the conformal deposition of polyelectrolytes over cotton fibers}, volume={14}, ISSN={["1572-882X"]}, DOI={10.1007/s10570-007-9126-z}, number={6}, journal={CELLULOSE}, author={Hyde, Kevin and Dong, Hong and Hinestroza, Juan P.}, year={2007}, month={Dec}, pages={615–623} }
 @article{hyde_rusa_hinestroza_2005, title={Layer-by-layer deposition of polyelectrolyte nanlayers on natural fibres: cotton}, volume={16}, ISSN={["1361-6528"]}, DOI={10.1088/0957-4484/16/7/017}, abstractNote={The layer-by-layer (LbL) deposition of poly(sodium 4-styrene sulfonate) (PSS) and poly(allylamine hydrochloride) (PAH) over cotton fibres is reported. Cotton fibres offer unique challenges to the deposition of nanolayers because of their unique cross section as well as the chemical heterogeneity of their surface. Cationic cotton substrates were produced by using 2,3-epoxypropyltrimethylammonium chloride. Attenuated total reflectance FTIR, x-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) were used to validate the presence of the nanolayers as well as to corroborate their self-organized structure. TEM images indicated conformal and uniform coating of the cotton fibres. XPS spectral data were found to be in quantitative agreement with previous published work that studied the LbL deposition of PSS and PAH over synthetic substrates.}, number={7}, journal={NANOTECHNOLOGY}, author={Hyde, K and Rusa, M and Hinestroza, J}, year={2005}, month={Jul}, pages={S422–S428} }