Visualization of aerosol particles generated by near infrared nano- and femtosecond laser ablation

Koch, Joachim; Schlamp, Stefan; Rösgen, Thomas; Fliegel, Daniel; Günther, Detlef

doi:10.1016/j.sab.2006.11.006

Cited by 73 publications

(64 citation statements)

References 30 publications

(19 reference statements)

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“…There were fewer single large droplets compared to those observed with nanosecond ablation, suggesting that melting and ejection of molten mass was less prominent. This data confirmed that nanosecond pulsed ablation produces larger particles compared to femtosecond pulsed laser ablation as was also showed by Koch et al [35] for NIR-ns and NIR-fs-LA.…”

Section: Particle Size Measurementssupporting

confidence: 90%

“…Even though femtosecond laser ablation generated a larger amount of ablated mass compared to nanosecond laser ablation under the conditions in this study, the contribution of particles from the melted layer by nanosecond laser ablation appears to be significant for all analyzed samples. In addition to the mentioned parameters that have an effect on the mechanisms of particle formation, it was recently reported by Koch et al [35], that when using NIR-ns-LA, predominantly larger particles were formed in the present of argon compared to helium. They attributed these observations to the increased collisions frequency between particles product of the dynamic expansion patterns.…”

Section: Particle Size Measurementsmentioning

confidence: 99%

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Metal particles produced by laser ablation for ICP–MS measurements

González

LIU

Wen

et al. 2007

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Pulsed laser ablation (266nm) was used to generate metal particles of Zn and Al alloys using femtosecond (150 fs) and nanosecond (4 ns) laser pulses with identical fluences of 50 J cm -2 . Characterization of particles and correlation with InductivelyCoupled Plasma Mass Spectrometer (ICP-MS) performance was investigated. Particles produced by nanosecond laser ablation were mainly primary particles with irregular shape and hard agglomerates (without internal voids). Particles produced by femtosecond laser ablation consisted of spherical primary particles and soft agglomerates formed from numerous small particles. Examination of the craters by white light interferometric microscopy showed that there is a rim of material surrounding the craters formed after nanosecond laser ablation. The determination of the crater volume by white light interferometric microscopy, considering the rim of material surrounding ablation craters, revealed that the volume ratio (fs/ns) of the craters on the selected samples was approximately 9 (Zn), 7 (NIST627 alloy) and 5 (NIST1711 alloy) times more ablated mass with femtosecond pulsed ablation compared to nanosecond pulsed ablation. In addition, an increase of Al concentration from 0 to 5% in Zn base alloys caused a large increase in the diameter of the particles, up to 65% while using nanosecond laser pulses.When the ablated particles were carried in argon into an ICP-MS, the Zn and Al signals intensities were greater by factors of ~ 50 and ~ 12 for fs vs. ns ablation. Femtosecond 2 pulsed ablation also reduced temporal fluctuations in the 66 Zn transient signal by a factor of ten compared to nanosecond laser pulses.

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Section: Particle Size Measurementssupporting

confidence: 90%

Section: Particle Size Measurementsmentioning

confidence: 99%

Metal particles produced by laser ablation for ICP–MS measurements

González

LIU

Wen

et al. 2007

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“…Whereas TOF mass spectrometers allow the simultaneous sampling and fast sequential detection of ions (20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), the acquisition speed of quadrupole and sector field mass spectrometers are limited by the number of isotopes of interest or the required magnet jumps to reach all the isotopes. Developments in sector field (fast field generator) improved the acquisition speed for transient signals, with similar capabilities as known for quadrupole instruments.…”

Section: Jorge Pisonero Received Hismentioning

confidence: 99%

“…23,24 Moreover, aerosols are captured in symmetric vortices when striking a solid boundary during their kinetic stage of expansion. Only minor losses of around 1% were observed when the aerosols got in contact with the inner walls of the ablation cells operated at atmospheric pressures.…”

mentioning

confidence: 99%

Critical revision of GD-MS, LA-ICP-MS and SIMS as inorganic mass spectrometric techniques for direct solid analysis

Pisonero

Fernández

Günther

2009

J. Anal. At. Spectrom.

157

115

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“…Moreover, the transport tube has to be as short as possible to avoid the deposition of particles which could be source of fractionation [30]. The visualization of the aerosol inside the ablation cell and the transport tube was recently studied by Koch et al [13,31,32] in order to understand the behavior of the aerosol immediately after the impact of the laser and during the transport. Such studies revealed that femtosecond laser ablation (fs-LA) generally induces a homogenously distributed aerosol on turbulent flow and a more dynamic expansion perpendicular to the sample surface.…”

Section: Introductionmentioning

confidence: 99%