Formation of 1-D nanostructures of titanate thin films and thermal stability study.
One-dimensional (1-D) layered titanate nanotubes and nanoribbon thin films were prepared via the hydrothermal reaction of Ti metal flakes with concentrated NaOH solution. TEM, SEM, and XRD studies of the reaction products revealed that 20-nm-wide and about 1-microm-long nanoribbons formed in 5 M NaOH aqueous solution at 140 degrees C for 12 h, while 6 aproximately 8-nm-wide and several hundred-nanometer-long nanotubes formed with 10 M NaOH. The effect of post treatments on the thermal stablity, phase structure and morphology of the as-prepared nanotubes films was investigated. Different morphologies and crystallinity changes of the as-prepared nanotubes films during heat treatment process are attributed to the sodium impurity.
Guo
Yupeng
Y
Institute/Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, #98 Gunja-dong, Gwangjin-gu, Seoul 143-747, Korea.
Lee
Nam-Hee
NH
Oh
Hyo-Jin
HJ
Park
Kyeong-Soon
KS
Jung
Sang-Chul
SC
Kim
Sun-Jae
SJ