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RISS 인기검색어
- 검색키워드
- 저자 : Uyen Thi Phan Ngoc (검색결과 3 건)
- 무료
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Uyen Thi, Phan Ngoc,Male, Umashankar,Huh, Do Sung Elsevier 2018 Polymer Vol.147 No.-
<P><B>Abstract</B></P> <P>Poly (ε-caprolactone) honeycomb patterned porous films were selectively functionalized on the bottom surface with polypyrrole/silver (PPy/Ag) composite via <I>in situ</I> interfacial polymerization on a reactive substrate during the breath figure procedure. For the interfacial <I>in situ</I> polymerization, poly (ε-caprolactone) solution including pyrrole was cast on a reactive ice substrate. The reactive ice substrate contains aqueous methanesulfonic acid and silver nitrate as an oxidizing agent for the pyrrole monomer. FT-IR, EDX, UV-Visible, conductivity, and wetting measurements support the formation of PPy/Ag on the bottom surface of the films. Pore size, conductivity, and wettability increased with increased concentration of pyrrole. Films with different functionalization on either surfaces can be applied in various advanced applications such as flexible electrodes, tissue engineering, etc.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Bottom functionalized patterned films were fabricated using reactive substrate. </LI> <LI> Breath figure process was performed on top surface. </LI> <LI> Interfacial polymerization was performed on bottom surface. </LI> <LI> Color, composition, wetting, conductivity are different on top and bottom surfaces. </LI> <LI> Films might have a great promising potential in advanced applications. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Uyen Thi, Phan Ngoc,Male, Umashankar,Huh, Do Sung Elsevier 2018 Polymer Vol.144 No.-
<P><B>Abstract</B></P> <P>Moth eye-like patterned poly(vinyl alcohol) (PVA) films selectively containing titanium dioxide (TiO<SUB>2</SUB>) nanoparticles in the microdome were fabricated using polystyrene honeycomb patterned porous film as a template in which TiO<SUB>2</SUB> nanoparticles are pore-filled. The template was prepared by in situ pore filling of TiO<SUB>2</SUB> nanoparticles by the modified breath figure method, wherein the hydrolysis of titanium butoxide was performed in the condensed water droplets as microreactors. The moth eye-like patterned PVA film selectively containing TiO<SUB>2</SUB> nanoparticles in the microdome was transparent almost similar to the pristine PVA flat film. However, the film showed a reversible photochromism that changes to blue color by UV illumination and recovered by visible light. The obtained films may have potential applications in anti-reflective surfaces, photo-catalytic surfaces, opto-electronics, and photo-catalytic devices.</P> <P><B>Highlights</B></P> <P> <UL> <LI> First report on moth eye patterned films containing TiO<SUB>2</SUB> particles in microdomes. </LI> <LI> PVA were employed for the fabrication of moth eye patterned (MEP) films. </LI> <LI> MEP films were fabricated using honeycomb patterned porous films as templates. </LI> <LI> PVA/TiO<SUB>2</SUB> MEP films are transparent similar to PVA films and also show photochromism. </LI> <LI> These films can have great potential applications in opto-electronics. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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