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  1. No Access

    Article

    High-resolution three-photon biomedical imaging using doped ZnS nanocrystals

    Three-photon excitation is a process that occurs when three photons are simultaneously absorbed within a luminophore for photo-excitation through virtual states. Although the imaging application of this proces...

    Jung Ho Yu, Seung-Hae Kwon, Zdeněk Petrášek, Ok Kyu Park… in Nature Materials (2013)

  2. No Access

    Article

    Properties of modified Nafion® membranes with heavy amount of (3-mercaptopropyl) trimethoxysilane prepared by long-term infiltration

    Modified Nafion® membranes with a large amount of (3-mercaptopropyl) trimethoxysilane (MPTS) were fabricated by a long-term infiltration process. MPTS has been known as a strong surface modifier due to its abi...

    Hyejung Lee, Sung Bum Park, Myng-Hoon Oh, Sung** Kim… in Metals and Materials International (2010)

  3. No Access

    Article

    Novel hydrophobic coating process for gas diffusion layer in PEMFCs

    The behavior of water and gas distribution in the gas diffusion layers (GDLs) of proton exchange membrane fuel cells (PEMFCs) were investigated analytically. In order to prevent the flooding phenomenon of the ...

    Gug-Ho Yoon, Sung Bum Park, Eun Hyung Kim, Myung-Hoon Oh… in Journal of Electroceramics (2007)

  4. No Access

    Article

    Effect of heating temperature on dielectric properties of Pb(Zr,Ti)O3 [PZT] fibers

    Ferroelectric Pb(Zr0.53Ti0.47)O3 fibers were reproducibly fabricated by sol-gel technique using triethanolamine (TEA) complexed alkoxide. The phase transition from pyrochlore to perovskite took place about 400°C ...

    Yong-Il Park, Masayuki Nagai, Masaru Miyayama… in Journal of Materials Science (2001)

  5. No Access

    Article

    Effect of composition on ferroelectric properties of sol-gel derived lead bismuth titanate (PbBi4Ti4O15) thin films

    Bismuth layer-structured ferroelectric PbBi4Ti4O15(PBT) thin films were fabricated on Pt/Ti/SiO2/Si substrates by sol-gel spin coating and the effect of lead and bismuth concentration on phase transition, microst...

    Yong-Il Park, Masayuki Nagai, Masaru Miyayama… in Journal of Materials Science (2001)

  6. No Access

    Article

    High proton conductivity in ZrP-PTFE composites

    Yong-Il Park, Jae-Dong Kim, M. Nagai in Journal of Materials Science Letters (2000)

  7. No Access

    Article

    Proton conductivity in amorphous phosphate–PTFE composite

    Yong-Il Park, Jae-Dong Kim, M. Nagai in Journal of Materials Science Letters (2000)

  8. No Access

    Article

    Fast Proton Conductors from Inorganic-Organic Composites: II. Amorphous Phosphate-PTFE and ZrP-PTFE Composites

    A high proton-conductivity was observed in the composite of amorphous phosphate and polytetafluoroethylene (PTFE). Incorporation of amorphous phosphate into PTFE emulsion caused a large increase of conductivit...

    Yong-Il Park, Jae-Dong Kim, Masayuki Nagai in MRS Online Proceedings Library (1999)

  9. No Access

    Article

    Fast Proton Conductors from Inorganic-Organic Composites: I. Amorphous Phosphate-Nafion and Silicophosphate-PMA/PWA Hybrids

    A drastic increase of electrical conductivity was observed in the composite of amorphous phosphate and ion-exchange resins (Nafion) as phosphorus concentration increased. Incorporation of amorphous phosphate i...

    Yong-Il Park, Jae-Dong Kim, Masayuki Nagai in MRS Online Proceedings Library (1999)