Open AccessOptimisation of preparation conditions for Ti nanowires and suitability as an antibacterial material
Author(s) -
Munisparan Thivyah,
Yang Evyan Chia Yan,
Paramasivam Ragul,
Dahlan Nuraina Anisa,
Pushpamalar Janarthanan
Publication year - 2018
Publication title -
iet nanobiotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.366
H-Index - 38
eISSN - 1751-875X
pISSN - 1751-8741
DOI - 10.1049/iet-nbt.2017.0186
Subject(s) - nanowire , materials science , anatase , thermogravimetric analysis , chemical engineering , fourier transform infrared spectroscopy , ethylene glycol , annealing (glass) , nanotechnology , titanium , titanium dioxide , scanning electron microscope , nuclear chemistry , chemistry , composite material , organic chemistry , metallurgy , catalysis , photocatalysis , engineering
Ultrafine titanium dioxide (TiO 2 ) nanowires were synthesised using a hydrothermal method with different volumes of ethylene glycol (EG) and annealing temperatures. It shows that sodium titanate nanowires synthesised using 5 and 10 ml EG, which annealed at 400°C produced TiO 2 nanowires that correspond to a photochemically active phase, which is anatase. The influences of annealing temperatures (400–600°C) on the morphological arrangement of TiO 2 nanowires were evident in the field emission scanning electron microscopy. The annealing temperature of 500°C led to agglomeration, which formed a mixture of TiO 2 nanoparticles and nanowires. High thermal stability of TiO 2 nanowires revealed by thermogravimetric analysis and Fourier transform infrared spectroscopy spectrum showed the presence of the Ti–O–Ti vibrations as evidenced due to TiO 2 lattices. An antibacterial study using TiO 2 nanowires toward Escherichia coli and Klebsiella pneumoniae showed large zones of inhibition that indicated susceptibility of the microbe toward TiO 2 . Growth kinetic analysis shows that addition of TiO 2 has reduced optical density (OD) suggesting an inhibition of the growth of bacteria. These results indicate TiO 2 nanowires can be effectively used as an antimicrobial agent against gram‐bacteria. The TiO 2 nanowires could be exploited in the medical, packaging and detergent formulation industries and wastewater treatment.