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Enzyme‐Mediated Deposition of a TiO 2 Coating onto Biofunctionalized WS2 Chalcogenide Nanotubes
Author(s) -
Tahir Muhammad Nawaz,
Natalio Filipe,
Therese Helen Annal,
Yella Aswani,
Metz Nadine,
Shah Muhammad Raza,
Mugnaioli Enrico,
Berger Rüdiger,
Theato Patrick,
Schröder HeinzChristoph,
Müller Werner E. G.,
Tremel Wolfgang
Publication year - 2009
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200800841
Subject(s) - materials science , scanning electron microscope , coating , transmission electron microscopy , covalent bond , chemical engineering , surface modification , polymer , nanotechnology , organic chemistry , chemistry , composite material , engineering
Abstract A chemically specific and facile method for the biofunctionalization of WS 2 nanotubes (NT‐WS 2 ) is reported. The covalent modification strategy is based on the affinity of the nitrilotriacetic acid (NTA) side chain, which serves as a ligand for the surface binding to NT‐WS 2 and simultaneously as an anchor group for the binding of His‐tagged proteins to the polymer backbone. The polymer functionalized WS 2 nanotubes can be solubilized either in water or organic solvents; they are stable for at least one week. The probes were characterized by FT‐IR and UV‐vis spectroscopy. The immobilization of silicatein, a hydrolytic protein encountered in marine sponges, was visualized by scanning force microscopy (SFM) and confocal laser scanning microscopy (CLSM). The formation of the biotitania coating mediated by the immobilized silicatein onto the surface was characterized by scanning electron microscopy (SEM), and transmission electron microscopy (TEM).