Structural and optical properties of short peptides: nanotubes-to-nanofibers phase transformation

2014 ◽  
Vol 20 (7) ◽  
pp. 487-493 ◽  
Author(s):  
Amir Handelman ◽  
Amir Natan ◽  
Gil Rosenman
Keyword(s):  
Phase Transformation ◽  
Optical Properties ◽  
Short Peptides ◽  
Structural And Optical Properties

The Effects of Electron Beam Irradiation on Structural and Optical Properties of TiO2 Particles

2017 ◽  
Vol 888 ◽  
pp. 297-303 ◽  
Author(s):  
Cik Rohaida Che Hak ◽  
Siti Salwa Zainal Abidin ◽  
Nur Ubaidah Saidin ◽  
Siti Aishah Ahmad Fuzi ◽  
Yusof Abdullah ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Optical Properties ◽  
Photocatalytic Activity ◽  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Low Dose ◽  
Beam Irradiation ◽  
Structural And Optical Properties ◽  
Dose Irradiation ◽  
Indirect Band Gap

The effect of electron irradiation on structural and optical properties of TiO2 particles has been studied. The crystallinity change was observed at low dose irradiation (4-20 kGy) while phase transformation from pure anatase to mixture of anatase-rutile was inevitable after 100 kGy without significant change in crystallinity. The highest fraction of rutile:anatase ratio was 20:80 obtained at 700 kGy. Morphology study demonstrated that TiO2 particles were spherical, nano-sized and heavily agglomerated with no obvious microstructural changes were observed after irradiation. The direct and indirect band gap (Eg) showed a decrement at low dose but re-increased after irradiation at >100 kGy. The highest Eg was at 700 kGy which can be explained by the changes of TiO2 atomic structure in the presence of mixture anatase:rutile. Therefore, the electron beam irradiation does affect both structural and optical properties of TiO2 nanoparticles. This is expected to affect the photocatalytic activity of TiO2.

Structural and optical properties of phase transformation Barium doped HfO2 nanorods—Synthesis and characterization

Optik ◽  
2017 ◽  
Vol 140 ◽  
pp. 347-355 ◽  
Author(s):  
Manikantan J. ◽  
Ramalingam H.B. ◽  
Chandar Shekar B. ◽  
Murugan B. ◽  
Ranjith Kumar R. ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Optical Properties ◽  
Synthesis And Characterization ◽  
Structural And Optical Properties

Structural and Optical Properties of Cu2ZnSn(SxSe1–x)4 Thin Films

2018 ◽  
Vol 23 (3) ◽  
pp. 230-239
Author(s):  
E.P. Zaretskaya ◽  
◽  
V.F. Gremenok ◽  
A.V. Stanchik ◽  
A.N. Pyatlitski ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Structural And Optical Properties

Structural and optical properties of Tin Oxide and Indium doped SnO2 thin films deposited by thermal evaporation technique

2016 ◽  
Vol 12 (3) ◽  
pp. 4394-4399
Author(s):  
Sura Ali Noaman ◽  
Rashid Owaid Kadhim ◽  
Saleem Azara Hussain
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Tin Oxide ◽  
Thermal Evaporation ◽  
Pure Sno2 ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Evaporation Technique ◽  
Sno2 Thin Films

Tin Oxide and Indium doped Tin Oxide (SnO2:In) thin films were deposited on glass and Silicon  substrates  by  thermal evaporation technique.  X-ray diffraction pattern of  pure SnO2 and SnO2:In thin films annealed at 650oC and the results showed  that the structure have tetragonal phase with preferred orientation in (110) plane. AFM studies showed an inhibition of grain growth with increase in indium concentration. SEM studies of pure  SnO2 and  Indium doped tin oxide (SnO2:In) ) thin films showed that the films with regular distribution of particles and they have spherical shape.  Optical properties such as  Transmission , optical band-gap have been measured and calculated.

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