On the Mechanism of Volatilization of Large Biomolecules by Pulsed Laser Ablation of Frozen Aqueous Solutions

1991 ◽  
pp. 265-273 ◽  
Author(s):  
Peter Williams ◽  
Randall W. Nelson
Keyword(s):  
Laser Ablation ◽  
Aqueous Solutions ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation

Fabrication of Dispersed Permalloy Nanoparticles by Pulsed Laser Ablation in Aqua

2008 ◽  
Vol 1118 ◽  
Author(s):  
Ruqiang Bao ◽  
Zijie Yan ◽  
Yong Huang ◽  
Douglas B. Chrisey
Keyword(s):  
Laser Ablation ◽  
Sodium Dodecyl Sulfate ◽  
Aqueous Solutions ◽  
Laser Energy ◽  
Sodium Dodecyl ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Distilled Water ◽  
Pure Ethanol ◽  
Made In

ABSTRACTPermalloy (Ni81Fe19) nanoparticles with diameters of hundreds of nanometers have been successfully fabricated by pulsed laser ablation (PLA) in air, distilled water, pure ethanol and sodium dodecyl sulfate (SDS) aqueous solutions. The permalloy nanoparticles made in SDS solutions are typically spherical in shape. Lower laser energy with lower frequency leads to the formation of smaller permalloy nanoparticles. Higher concentration of SDS results in smaller nanoparticles. Lastly, we found some unusual permalloy nanoparticles with interesting morphologies made by PLA in air, distilled water and ethanol.

Сomposite Powders TiOx/CdS Synthesis and the Study of their Optical and Photocatalytic Properties

2017 ◽  
Vol 13 ◽  
pp. 309-315
Author(s):  
Ekaterina A. Gavrilenko ◽  
Alexander A. Biryukov
Keyword(s):  
Laser Ablation ◽  
Aqueous Solutions ◽  
Visible Light ◽  
Nd:Yag Laser ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Photocatalytic Properties ◽  
Nanocrystalline Powders ◽  
Visible Range ◽  
Stabilizing Agent

TiOx/CdS composites were synthesized by CdS deposition on TiOx from aqueous solutions of Cd (CH3COO)2 and Na2S with and without addition of a stabilizing agent–Na2SiO3. Initial high-defective TiOx nanocrystalline powders were prepared by pulsed laser ablation (Nd:YAG laser, 1064 nm, 7 ns) of Ti target in H2O. Composites obtained exhibit absorption in the visible range up to 520 nm. On the example of Rhodamine C photodecomposition in water it was revealed that the nanocomposite TiOx/CdS powders obtained exhibit good photocatalytic properties when excited by visible light.

Fabrication of oxide base nanostructures using pulsed laser ablation in aqueous solutions

2004 ◽  
Vol 79 (4-6) ◽  
pp. 1489-1492 ◽  
Author(s):  
T. Sasaki ◽  
C. Liang ◽  
W.T. Nichols ◽  
Y. Shimizu ◽  
N. Koshizaki
Keyword(s):  
Laser Ablation ◽  
Aqueous Solutions ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation

Investigation of the in situ generation of oxide-free copper nanoparticles using pulsed-laser ablation of bulk copper in aqueous solutions of DNA bases

RSC Advances ◽  
2016 ◽  
Vol 6 (111) ◽  
pp. 109885-109896 ◽  
Author(s):  
Farid Hajareh Haghighi ◽  
Hassan Hadadzadeh ◽  
Hossein Farrokhpour
Keyword(s):  
Laser Ablation ◽  
Aqueous Solutions ◽  
Copper Nanoparticles ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Dna Bases ◽  
Copper Target ◽  
Laser Ablation Method ◽  
Green Approach

The pulsed-laser ablation method was used as a facile and green approach to prepare oxide-free copper nanoparticles, and was performed by laser ablation of a copper target in aqueous solutions of the DNA bases.

Fabrication of Organic/Inorganic Nanocomposites Using Pulsed Laser Ablation of Zinc in Aqueous Solutions

2004 ◽  
Vol 847 ◽  
Author(s):  
Takeshi Sasaki ◽  
Changhao Liang ◽  
Hiroyuki Usui ◽  
Yoshiki Shimizu ◽  
Naoto Koshizaki
Keyword(s):  
Zinc Oxide ◽  
Laser Ablation ◽  
Aqueous Solutions ◽  
Zinc Oxide Nanoparticles ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Oxide Nanoparticles ◽  
Zinc Hydroxide ◽  
Surfactant Solutions ◽  
Inorganic Nanocomposites

ABSTRACTHybrid organic/inorganic nanocomposites composed of zinc hydroxide and surfactant molecule, and/or zinc oxide nanoparticles were fabricated using pulsed laser ablation of zinc in aqueous solutions of various surfactants. A Zn plate was ablated by a pulsed Nd:YAG laser in four types of surfactant solutions with different concentrations. Zinc oxide nanoparticles with average diameter of 10–40 nm were obtained in cationic, amphoteric and nonionic surfactant solutions. Unique layered organic/inorganic nanocomposites composed of zinc hydroxide layers and surfactant molecules were obtained in aqueous solutions of the anionic surfactants, sodium alkyl sulfate (CnH2n+1SO4-·Na+). The carbon number, n, in the alkyl sulfate family is very important for the formation and structure of the layered nanocomposites. The layered organic/inorganic nanocomposite can be obtained only in the specific sodium alkyl sulfates (n = 12, 13, 14 and 16) and the layer spacing of the nanocomposites increased with n from 26.8 Å to 42.0 Å. It is shown that the structures of ZnO nanoparticles and layered organic/inorganic nanocomposites can be controlled by the type of surfactants in solution.

Volatilization of high molecular weight DNA by pulsed laser ablation of frozen aqueous solutions

Science ◽  
1989 ◽  
Vol 246 (4937) ◽  
pp. 1585-1587 ◽  
Author(s):  
R. Nelson ◽  
M. Rainbow ◽  
D. Lohr ◽  
P Williams
Keyword(s):  
Molecular Weight ◽  
Laser Ablation ◽  
Aqueous Solutions ◽  
High Molecular Weight ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
High Molecular Weight Dna

Pulsed laser ablation of soft tissues, gels, and aqueous solutions at temperatures below 100°C

1996 ◽  
Vol 18 (3) ◽  
pp. 231-240 ◽  
Author(s):  
Alexander A. Oraevsky ◽  
Steven L. Jacques ◽  
Rinat O. Esenaliev ◽  
Frank K. Tittel
Keyword(s):  
Laser Ablation ◽  
Aqueous Solutions ◽  
Soft Tissues ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation

Observations on the growth of YBa2Cu3O7-δ thin films on MgO by pulsed-laser ablation

1991 ◽  
Vol 49 ◽  
pp. 1068-1069
Author(s):  
M. Grant Norton ◽  
C. Barry Carter
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Laser Ablation ◽  
Substrate Surface ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Laser Ablation Process ◽  
Deposition Parameters

Pulsed-laser ablation has been widely used to produce high-quality thin films of YBa2Cu3O7-δ on a range of substrate materials. The nonequilibrium nature of the process allows congruent deposition of oxides with complex stoichiometrics. In the high power density regime produced by the UV excimer lasers the ablated species includes a mixture of neutral atoms, molecules and ions. All these species play an important role in thin-film deposition. However, changes in the deposition parameters have been shown to affect the microstructure of thin YBa2Cu3O7-δ films. The formation of metastable configurations is possible because at the low substrate temperatures used, only shortrange rearrangement on the substrate surface can occur. The parameters associated directly with the laser ablation process, those determining the nature of the process, e g. thermal or nonthermal volatilization, have been classified as ‘primary parameters'. Other parameters may also affect the microstructure of the thin film. In this paper, the effects of these ‘secondary parameters' on the microstructure of YBa2Cu3O7-δ films will be discussed. Examples of 'secondary parameters' include the substrate temperature and the oxygen partial pressure during deposition.

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