Dispositif de bombardement ionique pour préparations micrographiques

Paulus, M.; Reverchon, François

doi:10.1051/jphysap:01961002206010300

Cited by 17 publications

(4 citation statements)

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“…Prior to introducing the argon gas, the deposition chamber was evacuated to a base pressure of 1 × 10 −7 Torr. The ion-beam sputter deposition module uses a Paulus and Reverchon type ion gun [11]. In one set of experiments the beam of Au atoms coming out of the target was collimated, as indicated in figure 1.…”

Section: Methodsmentioning

confidence: 99%

Synthesis of aligned nanoparticles on laser-generated templates

Guan

Pedraza

2005

Nanotechnology

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A fast and simple technique that produces self-aligned gold nanoparticles on a silicon substrate, covering a large area, is described. This technique involves three consecutive steps: first, the substrate is laser-irradiated to produce a periodic nanorippled structure; second, a thin film of gold is grown using ion-beam sputter deposition; and third, a thermal treatment is conducted to produce the formation and self-alignment of nanoparticles. The nanoparticles form along strips parallel to the nanoripple lines. The strip spacing equals the nanoripple spacing and the strip width depends on the angle of deposition and the divergence of the ion beam. The nanoparticle diameter is a function of the annealing temperature and time. It was found that deposition of the film at a very shallow grazing angle (0 • ) induces, upon thermal annealing in air at 800 • C, the formation of single nanoparticle rows aligned along the ripple ridges. In order to obtain the single-particle lines, a beam collimator, aimed at reducing the angular spread of the incident ion beam, was employed during deposition.This technique is general and could be used in a large number of substrate/film combinations. Studies of other substrates would provide optimum conditions to obtain similar results, as laser-induced periodic structures are a fairly universal phenomenon.

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Section: Methodsmentioning

confidence: 99%

Synthesis of aligned nanoparticles on laser-generated templates

Guan

Pedraza

2005

Nanotechnology

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“…Prior to introducing the argon gas, the deposition chamber was evacuated to a base pressure of 1 × 10 −7 Torr. The ion beam sputter deposition module uses a Paulus and Reverchon type ion gun [26]. In one set of experiments the beam of Ni atoms emerging from the target was collimated as indicated in figure 1(a).…”

Section: Methodsmentioning

confidence: 99%

Non-lithographic organization of nickel catalyst for carbon nanofiber synthesis on laser-induced periodic surface structures

et al. 2007

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We present a non-lithographic technique that produces organized nanoscale nickel catalyst for carbon nanofiber growth on a silicon substrate. This technique involves three consecutive steps: first, the substrate is laser-irradiated to produce a periodic nanorippled structure; second, a thin film of nickel is deposited using glancing-angle ion-beam sputter deposition, followed by heat treatment, and third, a catalytic dc plasma-enhanced chemical vapor deposition (PECVD) process is conducted to produce the vertically aligned carbon nanofibers (VACNF). The nickel catalyst is distributed along the laser-induced periodic surface structure (LIPSS) and the Ni particle dimension varies as a function of the location on the LIPSS and is correlated to the nanoripple dimensions. The glancing angle, the distance between the ion beam collimators and the total deposition time all play important roles in determining the final catalyst size and subsequent carbon nanofiber properties. Due to the gradual aspect ratio change of the nanoripples across the sample, Ni catalyst nanoparticles of different dimensions were obtained. After the prescribed three minute PECVD growth, it was observed that, in order for the carbon nanofibers to survive, the nickel catalyst dimension should be larger than a critical value of ∼19 nm, below which the Ni is insufficient to sustain carbon nanofiber growth.

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“…The introduction of ion milling in the 1950s for the preparation of mineral specimens for use with the TEM revolutionized the study of earth materials (Castaing and Labourie 1953;Paulus and Reverchon 1961;Barber 1970). Previous approaches to TEM examination of metals and biological tissues yielded unsatisfactory results when applied to the brittle oxides that comprise the bulk of the Earth and many meteorites.…”

Section: Introductionmentioning

confidence: 99%

Focused ion beam milling: A method of site-specific sample extraction for microanalysis of Earth and planetary materials

Heaney

Vicenzi

Giannuzzi

et al. 2001

American Mineralogist

184

120

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Argon ion milling is the conventional means by which mineral sections are thinned to electron transparency for transmission electron microscope (TEM) analysis, but this technique exhibits significant shortcomings. In particular, selective thinning and imaging of submicrometer inclusions during sample milling are highly problematic. We have achieved successful results using the focused ion beam (FIB) lift-out technique, which utilizes a 30 kV Ga + ion beam to extract electron transparent specimens with nanometer scale precision. Using this procedure, we have prepared a number of Earth materials representing a range of structures and compositions for TEM analysis. We believe that FIB milling will create major new opportunities in the field of Earth and planetary materials microanalysis, particularly with respect to ultraprecious mineral and rock samples.

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Dispositif de bombardement ionique pour préparations micrographiques

Cited by 17 publications

References 0 publications

Synthesis of aligned nanoparticles on laser-generated templates

Synthesis of aligned nanoparticles on laser-generated templates

Non-lithographic organization of nickel catalyst for carbon nanofiber synthesis on laser-induced periodic surface structures

Focused ion beam milling: A method of site-specific sample extraction for microanalysis of Earth and planetary materials

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