scholarly journals Anharmonicity Induced Faster Decay of Hot Phonons in Rutile TiO2 Nanorods: A Raman Spectromicroscopic study

2022 ◽  
Author(s):  
C Rani ◽  
Devesh Kumar Pathak ◽  
M. Tanwar ◽  
S Kandpal ◽  
T Ghosh ◽  
...  
Keyword(s):  
Tio2 Nanorods ◽  
Phonon Modes ◽  
Temperature Dependent ◽  
Rutile Tio2 ◽  
Hot Phonons ◽  
Thermal Perturbations ◽  
Raman Active Phonon

Temperature dependent Raman spectromicroscopy from rutile TiO2 nanorods has been studied here to understand the effect of thermal perturbations on different Raman active phonon modes. The TiO2 nanorods, characterized using...

Effect of Chemical Lithium Insertion into Rutile TiO2 Nanorods

2009 ◽  
Vol 113 (32) ◽  
pp. 14567-14574 ◽  
Author(s):  
M. Vijayakumar ◽  
Sebastien Kerisit ◽  
Chongmin Wang ◽  
Zimin Nie ◽  
Kevin M. Rosso ◽  
...  
Keyword(s):  
Tio2 Nanorods ◽  
Lithium Insertion ◽  
Rutile Tio2

scholarly journals Study of Thermometry in Two-Dimensional Sb2Te3 from Temperature-Dependent Raman Spectroscopy

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Manavendra P. Singh ◽  
Manab Mandal ◽  
K. Sethupathi ◽  
M. S. Ramachandra Rao ◽  
Pramoda K. Nayak
Keyword(s):  
Thermal Conductivity ◽  
Raman Spectroscopy ◽  
Temperature Coefficient ◽  
Heat Dissipation ◽  
Peak Position ◽  
Two Dimensional ◽  
Phonon Modes ◽  
Temperature Dependent ◽  
Excellent Candidate ◽  
High Figure

AbstractDiscovery of two-dimensional (2D) topological insulators (TIs) demonstrates tremendous potential in the field of thermoelectric since the last decade. Here, we have synthesized 2D TI, Sb2Te3 of various thicknesses in the range 65–400 nm using mechanical exfoliation and studied temperature coefficient in the range 100–300 K using micro-Raman spectroscopy. The temperature dependence of the peak position and line width of phonon modes have been analyzed to determine the temperature coefficient, which is found to be in the order of 10–2 cm−1/K, and it decreases with a decrease in Sb2Te3 thickness. Such low-temperature coefficient would favor to achieve a high figure of merit (ZT) and pave the way to use this material as an excellent candidate for thermoelectric materials. We have estimated the thermal conductivity of Sb2Te3 flake with the thickness of 115 nm supported on 300-nm SiO2/Si substrate which is found to be ~ 10 W/m–K. The slightly higher thermal conductivity value suggests that the supporting substrate significantly affects the heat dissipation of the Sb2Te3 flake.

Aligned rutile TiO2 nanorods: Facile synthesis and field emission

2013 ◽  
Vol 59 ◽  
pp. 187-195 ◽  
Author(s):  
Dong-Sheng Li ◽  
Jian-Biao Chen ◽  
Cheng-Wei Wang ◽  
Wei-Dong Zhu ◽  
Ling Zhang ◽  
...  
Keyword(s):  
Field Emission ◽  
Tio2 Nanorods ◽  
Facile Synthesis ◽  
Rutile Tio2

scholarly journals One-Step Acidic Hydrothermal Preparation of Dendritic Rutile TiO2 Nanorods for Photocatalytic Performance

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 683 ◽  
Author(s):  
Cheng Gong ◽  
Jun Du ◽  
Xiuyun Li ◽  
Zhenjie Yu ◽  
Jiansong Ma ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Contact Angle ◽  
Hydrothermal Method ◽  
Photocatalytic Performance ◽  
Three Dimensional ◽  
Tio2 Nanorods ◽  
Foil Surface ◽  
Rutile Tio2 ◽  
X Ray ◽  
One Step

Three-dimensional and dendritic rutile TiO2 nanorods were successfully fabricated on a Ti foil surface using a one-step acidic hydrothermal method. The TiO2 nanorods were characterized using X-ray diffraction (XRD), energy dispersive X-ray spectrometry (EDX), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and optical contact angle testing. The results showed that the nanorods with diameters of 100–500 nm and lengths of 100 nm to 1 μm were obtained on the Ti foil surface. The length and density of the TiO2 nanorods were perfect at the conditions of HCl concentration 0.5 mol/L, temperature 220 °C, and reaction time 12 h. The TiO2 nanorods formed parallel to the consumption of Ti and grew along the (110) direction having a tetragonal rutile crystal. The morphology of the nanorods possessed a three-dimensional structure. The contact angle of the nanorods was only 13 ± 3.1°. Meanwhile, the photocatalytic activities of the TiO2 nanorods were carried out using ultraviolet fluorescence spectrophotometry for the methyl orange detection, and the degradation was found to be about 71.00% ± 2.43%. Thus, TiO2 nanorods can be developed by a one-step acidic hydrothermal method using Ti foil simultaneously as the substrate with a TiO2 source; the TiO2 nanorods exhibited photocatalytic performance while being environment-friendly.

scholarly journals Correction: Effect of aspect ratios of rutile TiO2 nanorods on overall photocatalytic water splitting performance

Nanoscale ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 5685-5685
Author(s):  
Bing Fu ◽  
Zhijiao Wu ◽  
Shuang Cao ◽  
Kai Guo ◽  
Lingyu Piao
Keyword(s):  
Water Splitting ◽  
Tio2 Nanorods ◽  
Rutile Tio2 ◽  
Photocatalytic Water Splitting ◽  
Aspect Ratios ◽  
Correction Effect

Correction for ‘Effect of aspect ratios of rutile TiO2 nanorods on overall photocatalytic water splitting performance’ by Bing Fu et al., Nanoscale, 2020, DOI: 10.1039/c9nr10870j.

scholarly journals Relaxation dynamics of deeply supercooled confined water in l,l-diphenylalanine micro/nanotubes

2015 ◽  
Vol 17 (48) ◽  
pp. 32126-32131 ◽  
Author(s):  
P. M. G. L. Ferreira ◽  
M. S. Ishikawa ◽  
S. Kogikoski ◽  
W. A. Alves ◽  
H. Martinho
Keyword(s):  
Temperature Dependence ◽  
Low Frequency ◽  
Confined Water ◽  
Relaxation Dynamics ◽  
Phonon Modes ◽  
Raman Active Phonon

The temperature dependence (10–290 K) of the low-frequency (20–150 cm−1) Raman-active phonon modes of deeply supercooled confined water in l,l-diphenylalanine micro/nanotubes was analyzed.

Magnetic properties of Sm-doped rutile TiO2 nanorods

2016 ◽  
Vol 687 ◽  
pp. 294-299 ◽  
Author(s):  
Li-Ting Tseng ◽  
Xi Luo ◽  
Sean Li ◽  
Jiabao Yi
Keyword(s):  
Magnetic Properties ◽  
Tio2 Nanorods ◽  
Rutile Tio2
Sign in / Sign up

Export Citation Format

Share Document