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Antibacterial Activities of Tellurium Nanomaterials
Author(s) -
Lin ZongHong,
Lee ChiaHsin,
Chang HsinYun,
Chang HuanTsung
Publication year - 2012
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201101006
Subject(s) - antibacterial activity , reagent , nanomaterials , tellurium , nanoparticle , nuclear chemistry , escherichia coli , hydrazine (antidepressant) , ion , chemistry , nanotechnology , nanowire , materials science , combinatorial chemistry , inorganic chemistry , bacteria , organic chemistry , chromatography , biochemistry , biology , genetics , gene
We prepared four differently shaped Te nanomaterials (NMs) as antibacterial reagents against Escherichia coli . By controlling the concentrations of hydrazine (N 2 H 4 ) as reducing agent, NaCl, and temperature, we prepared Te nanowires, nanopencils, nanorices, and nanocubes. These four Te NMs resulted in a live/dead ratio of E. coli cells of less than 0.1, which is smaller than that of Ag nanoparticles. The order of antibacterial activity against E. coli is nanocubes ≈ nanorices > nanopencils ≈ nanowires. This is in good agreement with the concentration order of tellurite (TeO 3 2− ) ions released from Te NMs in E. coli cells, revealing that TeO 3 2− ions account for the antibacterial activity of the four Te NMs. We found that spherical Te nanoparticles (32 nm in diameter) with TeO 3 2− ions were formed in the E. coli cells. Compared to Ag nanoparticles that are commonly used as antibacterial reagents, Te NMs have higher antibacterial activity and lower toxicity. Thus, Te NMs hold great practical potential as a new and efficient antibacterial agent.