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A Biological Approach for the Synthesis of Bismuth Nanoparticles: Using Thiolated M13 Phage as Scaffold
We report the synthesis of Bi nanoparticles
(Bi NPs) using the
M13 phage as scaffold. The p8 protein of the phage is functionalized
with thiol groups of different lengths, and these thiolated regions
act as nucleation centers for Bi<sup>3+</sup> ions. The size distribution,
shape, and resilience to oxidation of the Bi NPs depend on the length
of the thiol group used. The NPs are characterized by high resolution
transmission electron microscopy, Raman, and IR spectroscopies, matrix
assisted laser desorption/ionization, and optical absorption. These
results show that the nanoparticles are crystalline and have a typical
diameter of ā¼3.0 nm. The method of preparation presented here
is reproducible and implies āgreenerā conditions than
those reported elsewhere. To the best of our knowledge, this is the
first report of bismuth nanoparticles synthesized by a biomineralization
method