Pressure dependent formation of small Cu and Ag particles during laser ablation

Pászti, Zoltán; Horváth, Z.; Petö, G.; Karacs, Albert; Guczi, L.

doi:10.1016/s0169-4332(96)00908-7

Cited by 49 publications

(19 citation statements)

References 8 publications

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“…These experiments were conducted at atmospheric pressure with a conventional apparatus for particle sizing using a differential mobility analyzer (DMA). In fact, aerosol generation by pulsed laser ablation from various solid surfaces like refractory materials,4,5 silicon,6 or metallic7,8 targets, has already been studied because of applications in engineering, particularly in nanostructure synthesis. Control of the particle size and composition is a critical issue for nanostructure synthesis.…”

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confidence: 99%

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Direct detection of particles formed by laser ablation of matrices during matrix‐assisted laser desorption/ionization

Alvès

Kalberer

Zenobi

2003

Rapid Comm Mass Spectrometry

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We report the detection of nanoparticles formed by irradiating matrix-assisted laser desorption/ionization (MALDI) matrix samples. This is direct evidence for the ejection of large size aggregates in the MALDI process. Nanometer-size particles were generated via a tunable solid-state UV laser, irradiating a sample placed in a nitrogen atmosphere. Size distribution measurements were performed using a differential mobility analyzer and a condensation particle counter. Particles in the 10-1000 nm size range were detected. The dependence of the particle size distribution on the laser fluence, wavelength and matrix was investigated. The observed effects are discussed and related to the MALDI ablation dynamics and gas-phase processes.

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confidence: 99%

“…Thus, a number of publications have investigated the processes leading to particle formation through direct droplet ejection or gas‐phase reactions. It has been shown that ablation parameters4,5,8,9 and also the gas pressure6–8,10 govern the particle formation by laser ablation 11…”

mentioning

confidence: 99%

Direct detection of particles formed by laser ablation of matrices during matrix‐assisted laser desorption/ionization

Alvès

Kalberer

Zenobi

2003

Rapid Comm Mass Spectrometry

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“…Atom and particle deposition on flat surfaces in vacuo has been practiced for many years using continuous and pulsed sources, including Knudsen cells, and laser ablation systems [6][7][8][9][10][11][12][13][14][18][19][20][21][22]. Deposition on particles is often performed via chemical vapor deposition (CVD) in a fluid bed [23,24].…”

Section: Atomic Beam Deposition (Abd) On Micron-sized Particlesmentioning

confidence: 99%

Techniques for Fabricating Nanoscale Catalytic Circuits

et al. 2008

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This paper describes the development of a new technique, atomic beam deposition (ABD), for the fabrication of catalysts with different active sites capable of catalyzing different chemical reactions. Using ABD, submonolayer amounts of Te and Cu atoms were deposited on vanadyl pyrophosphate (VPO) catalyst particles, and precise non-steady-state kinetic characterization was performed using the temporal analysis of products (TAP) reactor immediately following deposition. Results from TAP Knudsen pulse response experiments determine if small changes in the metal surface composition would produce detectable changes in catalytic properties. Partial oxidation of 1-butene to furan was used as the test reaction. Furthermore, this paper also demonstrates the sensitivity of the TAP reactor by measuring oxygen uptake on a single 350 lm diameter polycrystalline Pt particle packed in a bed with 100,000 inert quartz particles of similar dimensions. The Pt experiments demonstrate the precise manipulation of surface oxygen content.

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“…First, in a catalytic reaction the metal particle size, in particular in nano size range, plays a crucial role. Recent application of thin film technology based techniques offers a new approach to fabricate uniform size of metal nanoparticles as detailed and discussed [119][120][121][122][123]. However, the intrinsic activity of the site on, e.g., terraces, corners, or kinks is not identical.…”

Section: Controlling Particle Sizementioning

confidence: 99%