• Title/Summary/Keyword: nano template

Search Result 167, Processing Time 0.031 seconds

Comparison of Enantioselective CEC Separation of OT-MIP Capillary Columns with Templates of Various Camphor Derivatives Made by the Pre-established General Preparation Protocol

  • Zaidi, Shabi Abbas;Lee, Seung-Mi;Lee, Ju-Young;Cheong, Won-Jo
    • Bulletin of the Korean Chemical Society
    • /
    • v.31 no.10
    • /
    • pp.2934-2938
    • /
    • 2010

  • Some open tubular (OT) molecule imprinted polymer (MIP) silica capillary columns with templates of camphor derivatives such as 10-camphorsulfonic acid (10-CSA), 10-camphorsulfonamide (10-CS) and camphor-p-tosyl hydrazone (CTH) have been successfully prepared by the prior generalized preparation protocol. The three MIP thin layers of different templates showed quite different morphologies. The chiral selectivity of each MIP column for the template enantiomers was optimized by changing eluent composition and pH. The optimization conditions were found to be different for the three MIPs. This work suggests prospective successful extension of the generalized preparation protocol for OT-MIP silica capillary columns toward templates of a variety of chemical groups.

  • https://doi.org/10.5012/bkcs.2010.31.10.2934 인용 PDF KSCI

High Luminescence Properties of YPV nano size phosphors by a Liquid Phase Precursor Method

  • Jo, D.S.;Dulda, A.;Masaki, T.;Yoon, D.H.
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2009.10a
    • /
    • pp.1293-1296
    • /
    • 2009

  • The synthesis of nano-size ($Y_{0.955}Eu_{0.1}$)($P_{0.7}V_{0.45}$)$O_4$ red phosphors were conducted by using a Liquid Phase Precursor (LPP) method. In this method, cellulose pulp was used as a template showing the micro fibre structures to obtain the nano size YPV red phosphor. Aqueous solutions of raw materials were impregnated into cellulose pulp and subsequently impregnated pulp was dried and fired at $800-1200^{\circ}C$ for 1h. The effect of luminescence properties on compositions and temperatures was evaluated with photoluminescence spectrum, X-ray diffraction and FE-SEM, and TEM. High efficiency (~110%) of phosphor of size of ~500nm fired at $1150^{\circ}C$ was obtained compared with the micro size of commercial product. High efficiency behaviors of nano size phosphors were discussed in this paper.

  • PDF

Electrochemical Template Synthesis of Conducting Polymer Microstructures at Addressed Positions (템플레이트의 국소 위치에 형성된 전도성 고분자 미세구조물의 전기화학 합성)

  • Lee Seung Hyoun;Suh Su-Jeong;Yun Geum-Hee;Son Yongkeun
    • Journal of the Korean Electrochemical Society
    • /
    • v.7 no.2
    • /
    • pp.100-107
    • /
    • 2004

  • The nano or micro sized structures of conducting polymer had been prepared by synthesizing the desired polymer within the pores of template of nano or micro porous membrane filter. In this study, we had tried to fabricate conducting polymer microstructures on an electrode by using electrochemical deposition adopting template synthesis. Our attention was focused on two different things, attaching template on the electrode and fabricating microstructures only at limited areas of the electrode. A conducting polymer, PEDiTT (poly 3,4-ethylenedithi-athiophene) solution was blended with PVA(polyvinyl alcohol) solution and used as an conducting adhesive. After attaching template membrane, the electrode were immersed in 0.5M pyrrole in 0.1M KCI solution, and electrochemical polymerization was performed. The growth process of the microstructures studied by SEM. The electrochemical fabrication of conducting polymer was performed by using two-electrode system. A large working electrode and a micro scale disc electrode were used for the confined area synthesis. Polymerization potential was 4V in an electrolytic solution made of KCI in deionized water. The optimum polymerization conditions were, i.e. (4V/100sec) for $250{\mu}m$ electrode and (6V/30 sec) for $10{\mu}m$ electrode.

  • https://doi.org/10.5229/JKES.2004.7.2.100 인용 PDF KSCI