Formation of anatase TiO2 nanospheres by simple polymer gel technique

2012 ◽  
Author(s):  
T. Prakash ◽  
M. Navaneethan ◽  
S. Ponnusamy ◽  
Y. Hayakawa ◽  
C. Muthamizhchelvan
Keyword(s):  
Anatase Tio2 ◽  
Polymer Gel ◽  
Gel Technique

Formation of anatase TiO2 nanoparticles by simple polymer gel technique and their properties

2011 ◽  
Vol 205 (1-3) ◽  
pp. 36-41 ◽  
Author(s):  
S.N. Karthick ◽  
K. Prabakar ◽  
A. Subramania ◽  
Ji-Tae Hong ◽  
Jin-Ju Jang ◽  
...  
Keyword(s):  
Tio2 Nanoparticles ◽  
Anatase Tio2 ◽  
Polymer Gel ◽  
Gel Technique

Surface defect (Ti3+) controlling in the first step on the anatase TiO2 nanocrystal by using sol–gel technique

2008 ◽  
Vol 255 (5) ◽  
pp. 2759-2766 ◽  
Author(s):  
Kongkiat Suriye ◽  
Bunjerd Jongsomjit ◽  
Chairit Satayaprasert ◽  
Piyasan Praserthdam
Keyword(s):  
Surface Defect ◽  
Sol Gel ◽  
Anatase Tio2 ◽  
Gel Technique

scholarly journals Synthesis and characterization of anatase TiO2:Cu2+ powders prepared via a sol-gel technique

2018 ◽  
Vol 34 (3) ◽  
Author(s):  
Trinh Thi Loan
Keyword(s):  
Single Phase ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Anatase Tio2 ◽  
Diffuse Reflection Spectroscopy ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Raman Modes ◽  
Gel Technique

Anatase TiO2 powders doped with different amounts of Cu2+ ions (0, 0.5, 1.0 and 4 mol%) were successfully synthesized by sol-gel method from precursors of TiCl4, (CH3COO)2Cu. Effect of Cu2+ concentrations on the structural and optical properties of TiO2 host was investigated by X-ray diffraction, Raman spectroscopy and diffuse reflection spectroscopy. The XRD analysis showed that the doped samples exhibit anatase single phase at annealing temperature 600 oC.  The Cu2+ contents did not affect on the lattice of TiO2 hot, but affected on positions of these Raman modes. The band gap of the TiO2:Cu2+ was decreased with the increase of doping concentration.

Freeze-etch TEM of aqueous polymer gel network morphology

1986 ◽  
Vol 44 ◽  
pp. 796-797
Author(s):  
J. A. N. Zasadzinski ◽  
R. K. Prud'homme
Keyword(s):  
Metal Ion ◽  
Polymer Network ◽  
Polymer Gels ◽  
Polymer Gel ◽  
Deformation History ◽  
Crosslinked Polymer ◽  
Aqueous Polymer ◽  
History Of ◽  
Gel Network ◽  
Network Morphology

The rheological and mechanical properties of crosslinked polymer gels arise from the structure of the gel network. In turn, the structure of the gel network results from: thermodynamically determined interactions between the polymer chain segments, the interactions of the crosslinking metal ion with the polymer, and the deformation history of the network. Interpretations of mechanical and rheological measurements on polymer gels invariably begin with a conceptual model of,the microstructure of the gel network derived from polymer kinetic theory. In the present work, we use freeze-etch replication TEM to image the polymer network morphology of titanium crosslinked hydroxypropyl guars in an attempt to directly relate macroscopic phenomena with network structure.

Preparation and Deposition of Hydroxyapatite on Biomaterials by Sol-Gel Technique-A Review

2013 ◽  
Vol 1 (2) ◽  
pp. 59-69 ◽  
Author(s):  
Sarbjit Kaur ◽  
Niraj Bala ◽  
Charu Khosla
Keyword(s):  
Sol Gel ◽  
Gel Technique

Role of Polymer in Enhancement of Conductivity of Proton and Lithium Conducting Polymer Gel Electrolytes

2016 ◽  
Vol 4 (2) ◽  
pp. 1
Author(s):  
KUMAR RAJIV ◽  
SHARMA SHUCHI ◽  
DHIMAN NARESH ◽  
PATHAK DINESH ◽  
◽  
...  
Keyword(s):  
Conducting Polymer ◽  
Polymer Gel ◽  
Gel Electrolytes ◽  
Polymer Gel Electrolytes

Dosimetry and Radioenhancement Comparison of Gold Nanoparticles in Kilovoltage and Megavoltage Radiotherapy using MAGAT Polymer Gel Dosimeter

2019 ◽  
Vol 9 (2Apr) ◽  
Author(s):  
S Farahani ◽  
N Riyahi Alam ◽  
S Haghgoo ◽  
M Khoobi ◽  
Gh Geraily ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
3D Visualization ◽  
Energy Levels ◽  
Polymer Gel ◽  
External Radiotherapy ◽  
Dose Enhancement ◽  
Internal Radiotherapy ◽  
Boost Radiotherapy

Background: Numerous unique characteristics of the nanosized gold, including high atomic number, low toxicity, and high biocompatibility make it one of the most appropriate nanostructures to boost radiotherapy efficacy. Many in-vivo and in-vitro investigations have indicated that gold nanoparticles (AuNPs) can significantly increase tumor injuries in low kilovoltage radiotherapy. While deep-lying tumors require much higher energy levels with greater penetration power, and investigations carried out in megavoltage energy range show contradictory results.Objective: In this study, we quantitatively assess and compare dose enhancement factors (DEFs) obtained through AuNPs under radiation of Cobalt-60 source (1.25MeV) versus Iridium-192 source (0.380 KeV) using MAGAT gel dosimeter.Material and Methods: MAGAT polymer gel in both pure and combined with 0.2 mM AuNPs was synthesized. In order to quantify the effect of energy on DEF, irradiation was carried out by Co-60 external radiotherapy and Ir-192 internal radiotherapy. Finally, readings of irradiated and non-irradiated gels were performed by MR imaging.Result: The radiation-induced R2 (1/T2) changes of the gel tubes doped with AuNPs compared to control samples, upon irradiation of beams released by Ir-192 source showed a significant dose enhancement (15.31% ±0.30) relative to the Co-60 external radiotherapy (5.85% ±0.14).Conclusion: This preliminary study suggests the feasibility of using AuNPs in radiation therapy (RT), especially in low-energy sources of brachytherapy. In addition, MAGAT polymer gel, as a powerful dosimeter, could be used for 3D visualization of radiation dose distribution of AuNPs in radiotherapy.

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