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손호연,이준배,장지희,김수지,남윤성 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
We introduce a facile method to prepare multi-layered titanium dioxide nanocrystals (TiO2 NCs) within porous polymer microspheres via tannin-mediated assembly. Highly open porous poly(methyl methacrylate) (PMMA) microspheres (p-MS) are prepared by a single oil-inwater emulsification. Tannic acid, one of polyphenols, is adsorbed onto the surfaces of the p-MS in an aqueous solution, which mediates a spontaneous deposition of colloidal TiO2 NCs on the surfaces of the p-MS via coordination between TiO2 and polyphenol. Multi-layered TiO2 NCs are assembled within the p-MS through layer-by-layer coatings of tannic acid and TiO2 NCs. The multi-layered TiO2-polymer p-MS show an excellent sun protection factor (SPF) for UV light screening applications. We expect that the tannin-mediated assembly can be used to develop functional inorganic-polymer hybrid microspheres in an aqueous milieus.
손호연,남윤성,김인수 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.30 No.-
We introduce a bioinspired approach for synthesizing noble metal nanostructures on electrospunpolymer nanofibers. Two different polymer nanofibers, poly (vinyl alcohol) and poly (e-caprolactone),were prepared by electrospinning followed by coatings with polydopamine (pD) through the oxidativepolymerization of dopamines. The pD coating generates a local reductive environment on the surface ofthe polymer nanofibers. Gold and silver nanostructures were synthesized by simply immersing the pDcoatednanofibers into an aqueous solution of metal ion precursors. While the metal ions were reducedlocally on the surface of the pD layer on the poly (e-caprolactone) nanofibers, resulting in large metalnanoparticles, they could easily infiltrate into the pD layer on the hydrophilic poly (vinyl alcohol)nanofibers and formed smooth polymer–metal hybrid nanostructures. This work emphasizes how theunderlying polymer matrix beneath the pD layer affects the morphological differences of the metalnanostructures on the surface of the nanofibers.
손호연,김미경,권미경,정현미,진영대 한국병원약사회 2007 병원약사회지 Vol.24 No.2
At present, an increase in the morbidity and mortality of the chronic respiratory diseases makes it more important to educate patients concerning inhalant therapy and self-management of their diseases. Since Sep.2004, by a demand from the respiratory medical specialists we have educated patients with the program that provides the informations of respiratory disease pathophysiology, roles of the inhalers and skills to optimize drug delivery, specific environmental control, when and how to rescue drugs, and roles of the different oral medications over 3-4 visits. We surveyed 82 patients who had taken the education of respiratory disease in Paik Hospital from Mar. 1st to Apr. 12th, 2007. Through a questionnaire and the results of counseling we assessed the levels of patient satisfaction and medication compliance and considered more effective programs. The surveys showed that our program had a positive impact on medication compliance and increase patient satisfaction. However, our education team found some complaints from patients and applied some recommendations for improvement. To involve more patients in our education program and increase their self-management ability , we must make much efforts to develop more improved education programs to raise their compliance and understanding of pharmaceutical care by partnership with patients and physicians.
손호연,전휘석,김경락,홍철암,남윤성 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.63 No.-
Plasmonic nanostructures have received increasing attention for photochemical applications due to high light absorptivity, tunability, sensitivity, and robustness. However, the short lifetime of hot electrons limits their efficient extraction, requiring the well-defined assembly of neighboring functional materials (e.g., electron filters and catalysts) along with the plasmonic nanostructures. Here we report the polyphenol-mediated assembly of gold nanoparticles (AuNPs) and titanium dioxide nanoparticles (TiO2 NPs) into colloidal plasmonic heterostructures. Tannic acid (TA) is deposited on the surface of TiO2 NPs through metal-ligand coordination, where TA serves as a reducing agent to synthesize AuNPs on the surface of TiO2 NPs. The generation and injection of hot carriers from the plasmonic heterostructures exhibit faster electron transfer kinetics under visible light illumination as determined using ferricyanide as a redox agent. Subsequent surface coatings of TiO2 NPs with phosphate-functionalized polyethylene glycol is shown as an effective means of selective surface passivation to suppress the charge transfer in the semiconductor/electrolyte interface. We expect that the interface control of plasmonic heterostructures for functional assembly and passivation can be utilized for their photochemical applications through integration with catalytic and sensing components.