Mueller, Michael Baik, Seungyun Jeon, Hojeong Kim, Yuchan Kim, Jungtae Kim, Young Jun 2024-01-20T07:02:42Z 2024-01-20T07:02:42Z 2021-09-05 2015-05 0169-4332 https://pubs.kist.re.kr/handle/201004/125438 The growth of crystalline vanadium oxide using a filamentous bacteriophage template was investigated using sequential incubation in a V2O5 precursor. Using the genetic modification of the bacteriophage, we displayed two cysteines that constrained the RSTB-1 peptide on the major coat protein P8, resulting in vanadium oxide crystallization. The phage-driven vanadium oxide crystals with different topologies, microstructures, photodegradation and vanadium oxide composites were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), quartz microbalance and dissipation(QCM-D) and X-ray photoelectron spectroscopy (XPS). Non-specific electrostatic attraction between awild-type phage (wt-phage) and vanadium cations in the V2O5 precursor caused phage agglomeration and fiber formation along the length of the viral scaffold. As a result, the addition of recombinant phage(re-phage) in V2O5 precursors formed heterogeneous structures, which led to efficient condensation of vanadium oxide crystal formation in lines, shown by QCM-D analysis. Furthermore, re-phage/VxOx composites showed significantly enhanced photodegradation activities compared with the synthesized-wt-phage-V2O5 composite under illumination. This study demonstrates that peptide-mediated vanadium oxide mineralization is governed by a complicated interplay of peptide sequence, local structure, kinetics and the presence of a mineralizing aid, such as the two cysteine-constrained peptides on the phage surface, and has potential for use in nanotechnology applications. (C) 2015 Elsevier B.V. All rights reserved. English Elsevier BV Directed synthesis of bio-inorganic vanadium oxide composites using genetically modified filamentous phage Article 10.1016/j.apsusc.2015.02.029 1 Applied Surface Science, v.337, pp.12 - 18 Applied Surface Science 337 12 18 N scie scopus 000351621000003 2-s2.0-84925351357 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article MINERALIZATION AGGREGATION CATALYSIS PEPTIDES Nanocomposites Photodegradation Nanoelectronicsa Filamentous phage Vanadium oxides