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In Vivo Synthesis of Nanocomposites Using the Recombinant Escherichia coli
Author(s) -
Jung Jae Hwan,
Lee Sang Yup,
Seo Tae Seok
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201803133
Subject(s) - nanorod , metal , materials science , nanocomposite , transmission electron microscopy , escherichia coli , nanoparticle , nanotechnology , chemical engineering , nuclear chemistry , chemistry , metallurgy , biochemistry , engineering , gene
Biogenic gold nanorod (AuNR)‐Ag core–shell nanocomposites (NCs) are synthesized by using recombinant Escherichia coli to demonstrate in vivo synthesis of biogenic NCs for the first time. The chemically synthesized AuNRs are internalized into the E. coli , and Ag ions are reduced and grown on the surface of the AuNRs with the assistance of metal‐binding proteins, producing biogenic core–shell AuNR‐Ag NCs. The core–shell structure of the biogenic AuNR‐Ag NC is confirmed by transmission electron microscopy and energy‐dispersive X‐ray analysis. The biogenic AuNR‐Ag NCs exhibit good plasmonic effects. While the core–shell morphology of the AuNR and Ag NCs is due to the similar lattice of Au and Ag, the shape of the biogenic NCs composed of gold nanoparticles and Fe is aciniform, and that of Fe 3 O 4 NPs and Au/Ag is a network structure, demonstrating the controllability of biogenic nanosynthesis using diverse metal combinations with different NC morphologies.