Raman study of structural transformations in self-assembled diphenylalanine nanotubes at elevated temperatures

2017 ◽  
Vol 48 (11) ◽  
pp. 1401-1405 ◽  
Author(s):  
Pavel S. Zelenovskiy ◽  
Anton O. Davydov ◽  
Alexander S. Krylov ◽  
Andrei L. Kholkin
Keyword(s):  
Elevated Temperatures ◽  
Structural Transformations ◽  
Raman Study ◽  
Self Assembled

High-pressure Raman study on CeO2 nanospheres self-assembled by 5 nm CeO2 nanoparticles

2011 ◽  
Vol 248 (5) ◽  
pp. 1154-1157 ◽  
Author(s):  
Bo Liu ◽  
Bingbing Liu ◽  
Quanjun Li ◽  
Zepeng Li ◽  
Mingguang Yao ◽  
...  
Keyword(s):  
High Pressure ◽  
Ceo2 Nanoparticles ◽  
Raman Study ◽  
Self Assembled

Raman study of self-assembled GaAs and AlAs islands embedded in InAs

2000 ◽  
Vol 61 (20) ◽  
pp. 13785-13790 ◽  
Author(s):  
D. A. Tenne ◽  
V. A. Haisler ◽  
A. I. Toropov ◽  
A. K. Bakarov ◽  
A. K. Gutakovsky ◽  
...  
Keyword(s):  
Raman Study ◽  
Self Assembled

Micro-Raman Study of Self-Assembled Nanostructures: (1−x)PZN:xPT Solid Solution

1999 ◽  
Vol 581 ◽  
Author(s):  
S. Gupta ◽  
R. S. Katiyar ◽  
R. Guo ◽  
A. S. Bhalla
Keyword(s):  
Lead Titanate ◽  
Relaxor Ferroelectrics ◽  
Structure Property ◽  
Temperature Dependent ◽  
Property Relations ◽  
Polarization Mechanism ◽  
Raman Study ◽  
Self Assembled ◽  
Polarized Raman ◽  
Temperature Dependent Study

ABSTRACTRelaxor ferroelectrics are one of the important classes of self-assembled nanostructure composite materials. Interesting features associated with the nanoregions give rise to the most interesting device related characteristics and unusual properties in these materials. Besides, they possess the largest property coefficients by themselves or when modified with lead titanate (PT). In this report, a detailed temperature dependent study has been carried out on (1-x)PZN-xPT relaxors with compositions x = 0.05 and 0.085 using polarized Raman scattering under optical and E-field variables and inferred the structure-property relations in order to obtain information to characterize the material for matching the application criteria. In addition, phase transitions associated with the relaxors have also been investigated to understand the polarization mechanism(s) for the unpoled and poled specimens.

Polarized Raman study of self-assembled Ge/Si dots under hydrostatic pressure

2009 ◽  
Vol 246 (3) ◽  
pp. 482-485 ◽  
Author(s):  
J. S. Reparaz ◽  
A. Bernardi ◽  
A. R. Goñi ◽  
M. I. Alonso ◽  
M. Garriga
Keyword(s):  
Hydrostatic Pressure ◽  
Raman Study ◽  
Self Assembled ◽  
Polarized Raman

Self-Assembled Structures of Gas-Phase Prepared FePt Nanoparticles

2001 ◽  
Vol 707 ◽  
Author(s):  
Bernd Rellinghaus ◽  
Sonja Stappert ◽  
Mehmet Acet ◽  
Eberhard F. Wassermann
Keyword(s):  
Gas Phase ◽  
Elevated Temperatures ◽  
High Mobility ◽  
Carbon Layer ◽  
Carbon Films ◽  
Blocking Temperature ◽  
Fept Nanoparticles ◽  
Irregular Shapes ◽  
Transmission Electron ◽  
Self Assembled

ABSTRACTWe report on a non-lithographic method for the preparation of self-assembled FePt nanoparticles via inert-gas condensation. Prior to deposition the particles can be sintered in flight at temperatures as high as TS = 1273 K. Whereas un-sintered particles have irregular shapes, particles sintered at elevated temperatures TS ≤ 793 K show a regular faceting. (High resolution) transmission electron microscopy ((HR)TEM) shows that these regularly faceted particles are of icosahedral structure. When being deposited onto amorphous carbon films, the gas-phase sintered particles are found to have a high mobility. In particular, for the high-temperature sintered FePt nanoparticles, we observe that this mobility leads to the formation of particle arrays with hexagonal close-packed arrangements. Within these ordered patches, the particles are separated from one another. Analytical investigations using energy filtered TEM (EFTEM) show that a carbon layer is formed between the particles. Magnetization analyses give results showing that the gas-phase sintered particles are superparamagnetic at room temperature with a blocking temperature of TB = 49K.

Raman study of the strain and H2 preconditioning effect on self-assembled Ge island on Si (001)

2005 ◽  
Vol 16 (7) ◽  
pp. 469-474 ◽  
Author(s):  
Lu Xu ◽  
P. J. McNally ◽  
G. D. M. Dilliway ◽  
N. E. B. Cowern ◽  
Chris Jeynes ◽  
...  
Keyword(s):  
Raman Study ◽  
Self Assembled

Raman study of structural transformations of titania coatings induced by laser annealing

1984 ◽  
Vol 45 (10) ◽  
pp. 1065-1067 ◽  
Author(s):  
L. S. Hsu ◽  
R. Solanki ◽  
G. J. Collins ◽  
C. Y. She
Keyword(s):  
Laser Annealing ◽  
Structural Transformations ◽  
Raman Study ◽  
Titania Coatings
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