Synthesis and Characterization of Flowerlike ZnO Nanoneedle Arrays on Si (100)

2009 ◽  
Vol 1174 ◽  
Author(s):  
Boqian Yang ◽  
Xianping Feng
Keyword(s):  
Normal Modes ◽  
Low Frequency ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Synthesis And Characterization ◽  
Zone Boundary ◽  
First Order ◽  
Uv Luminescence ◽  
Deposition Techniques

AbstractFlowerlike ZnO nanoneedle arrays have been synthesized on Si (100) substrates by pulsed laser deposition techniques. The tips of the nanoneedles are ˜ 20- 50 nm in diameter and their roots are as thick as ˜ 50- 100 nm. The nanoneedle arrays grow preferentially along the [0001] direction. Raman spectroscopy shows three first order optical normal modes which confirm wurtzite structure of ZnO nanoneedles. In the low frequency zone, additive modes (92, 122, 163, and 275 cm-1) are observed and can be attributed to zone boundary phonons. ZnO nanoneedle arrays exhibit a strong UV luminescence emission, and two strong peaks at 3.258 eV and 3.288 eV are observed.

Synthesis and characterization of p-type transparent conducting Ni1-xRuxO (0 ≤x ≤ 0.1) films prepared by pulsed laser deposition

2019 ◽  
Vol 45 (6) ◽  
pp. 7984-7994 ◽  
Author(s):  
Ahmed Alshahrie ◽  
S. Joudakzis ◽  
A.A. Al-Ghamdi ◽  
Lyudmila M. Bronstein ◽  
Waleed E. Mahmoud
Keyword(s):  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Synthesis And Characterization ◽  
Transparent Conducting ◽  
P Type

Disorder-Induced Low-Frequency Raman Band Observed in Deposited MoS2 Films

1994 ◽  
Vol 48 (6) ◽  
pp. 733-736 ◽  
Author(s):  
N. T. McDevitt ◽  
J. S. Zabinski ◽  
M. S. Donley ◽  
J. E. Bultman
Keyword(s):  
Crystal Structure ◽  
Thin Films ◽  
Raman Band ◽  
Low Frequency ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
First Order ◽  
Order Spectrum ◽  
History Of ◽  
Frequency Feature

Crystalline disorder in thin films plays an important role in determining their properties. Disorder in the crystal structure of MoS2 films prepared by magnetron sputtering and pulsed laser deposition was evaluated with the use of Raman spectroscopy. The peak positions and bandwidths of the first-order Raman bands, in the region 100 to 500 cm−1, were used as a measure of crystalline order. In addition, a low-frequency feature was observed at 223 cm−1 that is not part of the normal first-order spectrum of a fully crystalline specimen. Data presented here demonstrate that this band is characteristic of crystalline disorder, and its intensity depends on the annealing history of the film. This behavior seems to be analogous to the disorder found in graphite thin films.

Synthesis and characterization of PLZT thin films obtained by pulsed laser deposition

2004 ◽  
Vol 79 (4-6) ◽  
pp. 1283-1285 ◽  
Author(s):  
P. Verardi ◽  
F. Craciun ◽  
N. Scarisoreanu ◽  
G. Epurescu ◽  
M. Dinescu ◽  
...  
Keyword(s):  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Synthesis And Characterization ◽  
Plzt Thin Films
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