Bioassisted Room-Temperature Immobilization and Mineralization of Zinc Oxide—The Structural Ordering of ZnO Nanoparticles into a Flower-Type Morphology


  • This work was supported by a Scientific Research Grant from the Ministry of Education, Science, Sports, and Culture of Japan (MU, IK, and TA) and by the Industrial Technology Research Grant Program in ‘05 from New Energy and Industrial Technology Development Organization (NEDO) of Japan (MU). This research was also partly supported by the HEIWA NAKAJIMA foundation (TA) and by a Grant-in-Aid for the COE project, Giant Molecules and Complex Systems, 2002.


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A peptide with an affinity for ZnO, selected by a phage-display system, preferentially immobilizes ZnO particles on a gold-coated polypropylene plate and assists in the homogeneous assembly of 10 nm diameter ZnO nanoparticles into unique flower-like morphologies (see Figure). The peptide is selective in binding ZnO, but not ZnS or Eu2O3. This combinatorial library approach may yield new peptides used to create new structures via biomineralization.