Onion-Structured Spherical MoS2 Nanoparticles Induced by Laser Ablation in Water and Liquid Droplets’ Radial Solidification/Oriented Growth Mechanism

2017 ◽  
Vol 121 (41) ◽  
pp. 23233-23239 ◽  
Author(s):  
Le Zhou ◽  
Hongwen Zhang ◽  
Haoming Bao ◽  
Guangqiang Liu ◽  
Yue Li ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Growth Mechanism ◽  
Liquid Droplets ◽  
Oriented Growth ◽  
Mos2 Nanoparticles

Growth mechanism during selective epitaxy of p-doped SiC using VLS transport

2012 ◽  
Vol 1433 ◽  
Author(s):  
D. Carole ◽  
A. Vo-Ha ◽  
M. Lazar ◽  
N. Thierry-Jebali ◽  
D. Tournier ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Epitaxial Growth ◽  
Growth Mechanism ◽  
Growth Temperature ◽  
Liquid Droplets ◽  
Growth Mechanisms ◽  
Phase Growth ◽  
Selective Epitaxial Growth ◽  
Standard Configuration ◽  
Liquid Phase Growth

ABSTRACTSince a few years, VLS transport is studied not only for homoepitaxial SiC growth but also for SiC selective epitaxial growth (SEG). In this approach, a stacking of silicon and aluminum layers is deposited on the substrate and patterns are created by photolithography. Upon melting, the Al-Si liquid droplets are fed by propane to obtain the SEG of p-doped SiC. In this work, the growth mechanisms were deeper investigated, in particular the influence of the carrier gas (H2 or Ar) and the growth temperature. SEG experiments showed higher growth rates than those measured in the standard configuration (nonselective growth). Moreover, the SiC layers exhibited step-bunched areas characteristic of liquid phase growth but also areas with morphological features due to a disruption of the step-bunching growth mode.

Conditions for oriented growth of Y‐Ba‐Cu‐O and Bi‐Sr‐Ca‐Cu‐O films by pulsed laser ablation

1991 ◽  
Vol 69 (4) ◽  
pp. 2405-2409 ◽  
Author(s):  
H. ‐U. Krebs ◽  
M. Kehlenbeck ◽  
M. Steins ◽  
V. Kupcik
Keyword(s):  
Laser Ablation ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Oriented Growth

Growth Mechanism and Structure of Ain Films Grown on Sapphire by MOCVD

1997 ◽  
Vol 482 ◽  
Author(s):  
Yun-Xin Li ◽  
L. Salamanca-Riba ◽  
K. Wongchotigul ◽  
P. Zhou ◽  
M. G. Spencer ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Columnar Structure ◽  
Crystalline Quality ◽  
Lateral Growth ◽  
Oriented Growth ◽  
Columnar Growth ◽  
Nucleation Layer ◽  
Single Crystalline ◽  
Maximum Value ◽  
Layer 2

AbstractAIN films grown on sapphire by MOCVD with different V/IAR ratios were investigated by XRD, TEM and AFM. The AIN films show single crystalline character as well as columnar structure. The growth of AIN has three zones: (1) high-density nucleation layer (2) fine columnar growth and (3) grain merging and lateral growth. The films grown at intermediate V/III ratio have the maximum value of [0002] FWHM. When the V/HI ratio increases, the thickness of the nucleation zone and the film misorientation increase, but when the ratio is increased further, the nucleation zone decreases and the AIN film has a more highly oriented growth. These results suggest that the AIN films with optimum crystalline quality can be obtained by varying the V/III ratio during growth.

Formation of Submicron Single Crystal Particles and Dots by Laser Ablation

1994 ◽  
Vol 358 ◽  
Author(s):  
Hong Wu ◽  
R. D. Vispute ◽  
J. Narayan
Keyword(s):  
Quantum Dots ◽  
Laser Ablation ◽  
Single Crystal ◽  
Critical Size ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Liquid Droplets ◽  
Device Applications ◽  
Krf Excimer Laser ◽  
Lattice Matched

ABSTRACTWe have investigated the formation of micron-sized single crystal dots of germanium by pulsed laser ablation. The laser ablation of a Ge target (KrF excimer laser λ=248 nm, pulse rate 10Hz, pulse duration 25x10−9 seconds, and energy 10J /cm2) results in the formation of micron and submicron liquid droplets which are ejected from the target. These droplets can be crystallized into single crystal dots on lattice-matched substrates by rapid liquid-phase recrystallization. We report the details of microstructure as a function of dot size. It is found that under these conditions, below a critical size (about 2μm), the dots are crystalline;above which dots become polycrystalline. We discuss the implications of the results in producing doped and undoped single-crystal quantum dots for device applications.

Angular distribution of liquid droplets during the laser ablation of silicon target

2010 ◽  
Vol 42 (6-7) ◽  
pp. 1284-1288 ◽  
Author(s):  
Y. Belaroussi ◽  
T. Kerdja ◽  
S. Malek
Keyword(s):  
Angular Distribution ◽  
Laser Ablation ◽  
Liquid Droplets ◽  
Silicon Target

scholarly journals The influence of the fluid nature on femtosecond laser ablation properties of a SiO2/Si target and synthesis of ultrafine-grained Si nanoparticles

2020 ◽  
Vol 2 (9) ◽  
pp. 3991-4002 ◽  
Author(s):  
Niusha Lasemi ◽  
Christian Rentenberger ◽  
Gerhard Liedl ◽  
Dominik Eder
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Thermal Stresses ◽  
Femtosecond Laser Ablation ◽  
High Density ◽  
Liquid Droplets ◽  
Ultrafine Grained ◽  
Si Nanoparticles ◽  
Fast Cooling

Femtosecond laser assisted formation of ultrafine-grained Si NPs with a high density of defects. This can correlate with significant thermal stresses on primary NPs, fast cooling of ejected liquid droplets and incomplete ripening processes.

Growth mechanism of ZnO nanostructures produced by ultraviolet and visible laser ablation

2017 ◽  
Vol 423 ◽  
pp. 977-982 ◽  
Author(s):  
A.Og. Dikovska ◽  
D. Pallotti ◽  
S. Lettieri ◽  
G.B. Atanasova ◽  
G.V. Avdeev ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Growth Mechanism ◽  
Zno Nanostructures ◽  
Visible Laser

Morphology and growth mechanism of WO x films prepared by laser ablation of W in different atmospheres

2008 ◽  
Vol 83 (6) ◽  
pp. 68005 ◽  
Author(s):  
P. M. Ossi ◽  
A. Bailini ◽  
O. Geszti ◽  
G. Radnóczi
Keyword(s):  
Laser Ablation ◽  
Growth Mechanism

On the growth mechanism of nanoparticles in plasma during pulsed laser ablation in liquids

2017 ◽  
Vol 26 (4) ◽  
pp. 045002 ◽  
Author(s):  
F Taccogna ◽  
M Dell’Aglio ◽  
M Rutigliano ◽  
G Valenza ◽  
A De Giacomo
Keyword(s):  
Laser Ablation ◽  
Growth Mechanism ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Laser Ablation In Liquids
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