emission spectroscopic survey of graphite ablation in the

Time

Time-resolved optical emission spectroscopy was employed to examine the temporal properties of a plume formed by laser ablation of a graphite target in He, N 2, and Ar background gases. Time-dependent spectroscopic temperatures of electronically excited C 2 and CN molecules generated in the plume at different background gases and pressures were derived by simulation of the emission spectra.

Optical emission accompanying pulsed laser ablation of

They include cross sections and rate coefficients for various processes such as ionization, excitation, recombination, charge exchange, and also transition probabilities for line emission. This work presents results on electron impact excitation and ionization per photon coefficients as related to the interpretation of plume emissions accompanying 248 nm laser ablation of graphite in vacuum.

Specific Solvent Produces Specific Phase Ni Nanoparticles:

In this paper, we present a simple and controllable preparation of face centered cubic (fcc) and hexagonal close-packed (hcp) Ni nanoparticles by a pulsed Nd:YAG laser ablation method in the following four solvents: deionized water, methanol, hexane, and acetonitrile. We generated Ni/NiO, fcc, and/or hcp Ni nanoparticles by primary ablation to a Ni plate submerged in various solvents, followed

Dynamics of Laser Ablation for Growth by Pulsed Laser DeDosition

Dynamics of Laser Ablation for Thin Film Growth by Pulsed Laser Deposition David B. Geohegan and Alexander A. Puretzky* Solid State Division, Oak Ridge National Laboratory, "Visiting f'Yorn Institute of Spectroscopy, Troitsk, Russia P.O. Box 2008, MS-6056, Oak Ridge, Tennessee, 37831-6056

Expansion dynamics of laser ablated carbon plasma plume in

Time resolved emission spectroscopic measurements on a plasma plume generated by pulsed laser ablation of carbon in helium ambient atmosphere have been performed. Temporal proﬁles of electronically excited C2 species show a twin peak

Atomic emission spectroscopy

Atomic emission spectroscopy (AES) is a method of chemical analysis that uses the intensity of light emitted from a flame, plasma, arc, or spark at a particular wavelength to determine the quantity of an element in a sample. The wavelength of the atomic spectral line in the emission spectrum gives the identity of the element while the intensity of the emitted light is proportional to the

Spectroscopic study of carbon pellet ablation cloud

of an emission line from the ablation cloud is regarded as a measure of the spatial proﬁle of particle deposition, where it is The carbon (graphite) pellet used in the present study has a cylindrical shape (0.8 mm diameter and 0.8 mm length) and consists of.19

Laser Ablation of Graphite in the Presence of a Magnetic

Optical emission spectroscopic studies were carried out on ablation plumes produced by laser ablation of graphite at 266nm and 1064nm in vacuum and in nitrogen gas atmosphere with or without a magnetic field of -0.1 T. In vacuum, in the presence of the magnetic

Reactive pulsed laser ablation: Plasma studies

However, the spectroscopic studies confirming the formation of AIN nitride by ablation of Al in presence of nitrogen gas are not available. Formation of carbon nitride (CN) band sequence has been investigated by ablation of graphite in ambient nitrogen using spatially resolved optical emission measurements (Dwivedi, 1997 ).

Defense Technical Information Center Compilation Part Notice

emission spectroscopic studies of C2 and C3 species (470-475 nm); Au = 0 (510-516nm); A'u = -1 (550-565 produced by single- and double-pulse laser ablation of nm); and Au = -2 (595-615 nm); where Au is the graphite in helium atmosphere. It

Analytical Techniques for Trace Element Determination

[100] Wagner B, Garboś S, Bulska E, Hulanicki A. Determination of iron and copper in old manuscripts by slurry sampling graphite furnace atomic absorption spectrometry and laser ablation inductively coupled plasma mass spectrometry.

Pulsed CO2 laser ablation of graphite and polymers:

Spectroscopic analysis of the emission plumes of graphite, polyimide, polyethylene terepthalate, and polymethylmethacrylate that have been ablated by using a pulsed CO 2 laser operating at 10.6 μm shows the presence of CN and C 2, species not previously reported for CO 2 laser ablation.

A study of molecule formation during laser ablation of graphite

Laser ablation of graphite Figure 3. The.0;0/band of the Swan system of C2 recorded at z= 1 mm for various t at PN 2 =0:05 Torr. short compared with the time between two successive laser pulses, these CN radicals are in the fundamental electronic state X26C..

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In this work, time- and space-resolved optical emission spectroscopic investigations of plasmas induced by an excimer laser beam during the ablation of a graphite target in a nitrogen atmosphere are reported. The attention is focused on the bands of the C 2 (C1

Emission Spectroscopic Survey of Graphite Ablation in the

Emission Spectroscopic Survey of Graphite Ablation in the VKI Plasmatron Benjamin Vancrayenest and Douglas Fletcher Benjamin Vancrayenest von Karman Institute for Fluid Dynamics Search for more papers by this author and Douglas Fletcher

Time resolved study of CN band emission from plasma generated by laser irradiation of graphite

conditions have been evaluated from the emission spectrum of CN violet band. 2. Experimental Schematic diagram of the experimental tech- nique is shown in Fig. 1. Plasma was generated by laser ablation of the high purity graphite sample

Optical emission accompanying pulsed laser ablation of

Surface nanotexturing of tantalum by laser ablation in

Plasma emission produced by Dual Pulsed Laser Ablation (DPLA) on two perpendicular graphite targets, separated 3 mm, was analyzed. Ablation was carried out in vacuum (10-6 Torr) by an excimer (248 nm) and a Nd: YAG (1064 nm) lasers, delayed up to 20 {mu}s.

レーザーアブレーションでのグラファイトのレー

Shadowgraphic and emission imaging spectroscopic

1999/12/1Laser ablation of graphite in an Ar atmosphere at 560nbsp;Torr was done using a nanosecond-pulse Nd:YAG laser (1064nbsp;nm) at a fluence of 12nbsp;J/cm2. Dynamics in the ejection of carbon species and in their confinement near the graphite surface (lt;1nbsp;mm) due to their numerous collisions with Ar atoms were investigated by shadowgraphy, emission imaging, and

Growth of carbon nanotubes on Fe or Ni

Optical emission spectroscopic observation of the ablation plume of graphite and Ni/Y catalyst was performed in the Ar gas for a pressure range of 0–600 Torr at room temperature and 1000 C. The emission band intensity of C 3 ( 1 Π u ) at the distance of 2 mm from the target increased with increasing Ar gas pressure.

Rapid and Inexpensive Sampling Technique for

Abstract Methods of analyzing thin solid films have recently been reviewed by Pliskin and Zanin. 1 Their review shows that a good method for obtaining a fairly rapid survey analysis of a large number of impurities is emission spectroscopic analysis. When used for

Analytical Techniques for Trace Element Determination

J. Phys. D: Appl. Phys. 30 (1997) 1703–1709. Printed in the UK PII: S0022

Abstract. Optical emission studies of C2 molecules in plasma obtained by Nd:YAG laser ablation of graphite in a helium atmosphere are reported for irradiances in the range (1–9:2/ 1010 Wcm−2. The characteristics of the spectral emission intensity from the C2

Spectroscopic studies of the CH and NH radicals during

Optical emission spectroscopy of chemical species has been largely used during RPLA as diagnostic tool aiming to answer these problems. In this context, we performed plasma diagnostic using time and space resolved emission spectroscopy of CN, CH and NH radicals during the deposition of carbon nitride thin films by KrF excimer laser ablation of graphite at low ammonia pressures.