Systematization of the Mass Spectra for Speciation of Inorganic Salts with Static Secondary Ion Mass Spectrometry

Ham, Rita Van; Vaeck, Luc Van; Adams, and Freddy C.; Adriaens, Annemie

doi:10.1021/ac0400156

Cited by 28 publications

(33 citation statements)

References 46 publications

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“…Recently, Cuynen et al [43] and Van Ham et al [44] considered the energy randomization concept and the desorption-ionization (DI) model to be adequate to describe the formation of detected ions. In the DI model [45,46], desorption (or ablation) and ionization occur successively after photon bombardment in different regions of the selvedge.…”

Section: Study Of Cluster Ion Formation By La-msmentioning

confidence: 99%

Laser ablation mass spectrometry of inorganic transition metal compounds. Additional knowledge for the understanding of ion formation

Aubriet

Müller

2008

J. Am. Soc. Mass Spectrom.

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Laser ablation of transition-metal oxides have been investigated to better understand the formation processes of inorganic cluster ions. The study of binary oxide mixtures and the relative distribution of the ions produced suggest three salient mechanisms that occur after laser/matter interaction, that function to produce the observed ensemble of ionic species. Molecular recombination reactions, unimolecular dissociation processes, emission of small neutrals, including molecular oxygen from transition-metal oxide samples, or from species expelled in gas phase appear to be a significant mechanism, especially under high laser irradiance conditions. These processes are used to propose a set of pathways to rationalize the envelope of ionic clusters formed under photon bombardment. T he study of ion formation processes by mass spectrometry during inorganic compound laser ablation is not yet fully understood. However, several models have been proposed to describe and explain the laser ablation of inorganic compounds [1][2][3][4][5][6][7]. The interaction of a laser beam with a non-metallic solid induces different processes, leading to ejection of neutral and ionized species into the gas phase. Haglund proposed a qualitative description of these processes [7], which begins with the assumption that laser sputtering could be decomposed into four phases: (1) the absorption of laser energy by one or multiple-photon processes; (2) the conversion of the incident energy through radiative and non-radiative relaxation processes; (3) the ejection of species-atoms, molecules, neutrals, ions, excited species-from the irradiated surface; and (4) the formation and the expansion of a more or less dense plume of neutrals and ions. Two lasermatter interaction regimes have to be considered: the laser desorption (LD) and the laser ablation (LA). It is generally reported that LD results in emission of ions, atoms, and molecules without any substantial disturbance in the surrounding surface. LA implies a largescale disruption of surface and near-surface geometrical and electronic structure. These substantial qualitative differences allowed Haglung to identify desorption with a microscopic, and ablation with a mesoscopic view point. LD and LA have to be viewed as the extremes of a continuum, which ranges from the emission of isolated neutrals or ions in the case of LD to the massive removal of material resulting from the collective effects of multiple photons irradiating the same spatial locale in the case of LA. The phenomenology of LA is thought of in terms of formation of a plume of ejected species, which follows the laws of plasma and gas dynamics, and produces a large number of ionized species. Collisions of ions with neutrals occurring in the gas-phase plume after LA lead to ion-molecule condensation reactions. On the other hand, ions and neutrals possess a significant amount of energy, which can result in dissociation reactions. The length scale associated with laser ablation is on the order of d Х laser ϫv s , where laser is the dur...

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Section: Study Of Cluster Ion Formation By La-msmentioning

confidence: 99%

Laser ablation mass spectrometry of inorganic transition metal compounds. Additional knowledge for the understanding of ion formation

Aubriet

Müller

2008

J. Am. Soc. Mass Spectrom.

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“…A total of six layers can be observed in the total positive (TIC + ) and negative ion current (TIC À ) images. Images of sodium and aluminium could be correlated with the aid of optical microscopy to the blue pigment ultramarine (Na [8][9][10] 14 CH 3 ], m/z 460-463) are clearly present in the bottom three layers. They indicate the use of linseed oil as a binding medium.…”

Section: Imaging Of Paints and Pigmentsmentioning

confidence: 99%

“…SSIMS has emerged as a promising technique in this context [14]. Its potential advantage for obtaining molecule specific information lies primarily in the use of a low flux ion bombardment resulting in high relative molecular ion yields, although the total ion yield may be low.…”

Section: Speciation Of Pigmentsmentioning

confidence: 99%

Applications of SIMS to cultural heritage studies

Adriaens

Dowsett²

2006

Applied Surface Science

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“…Molecular information refers to specification of the local composition of a sample in terms of molecules rather than elements. Depending on the analytical methodology used, the oxidation state of an element, the presence of specific bonds, or the entire molecule as a whole is characterized [3]. In this study we aim at the latter.…”

Section: Introductionmentioning

confidence: 99%

“…analyte molecule attached to a stable ion) [3][4][5][6][7][8][9][10]. Additionally, the method can also generate spatially-resolved chemical information, which is valuable for the characterisation of heterogeneous samples [1,2,[11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Static secondary ion mass spectrometry (S-SIMS) for the characterization of surface components in mineral particulates

Ham

Vaeck

Adriaens

et al. 2006

Talanta

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The feasibility of static secondary ion mass spectrometry (S-SIMS) for the detection of molecule specific information from complex materials, such as natural clay and soil samples, has been investigated. Ion trap (IT), as well as triple quadrupole (TQ) instruments, have been used for mass analysis. Secondary ion images have been acquired using time-of-flight (TOF) S-SIMS. The generation of molecular adduct ions from thin and thick layers on the mineral substrates has been investigated using KBr as a simple model system. Results show that molecular adducts of KBr can be indeed detected from the spiked materials. However, the concentrations of the spiking solutions have to be significantly larger than expected from the surface area measured by gas adsorption techniques. In addition imaging analysis has evidenced that the detection of adduct ions in the mass spectra directly relates to the presence of local micro-crystallites.

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Systematization of the Mass Spectra for Speciation of Inorganic Salts with Static Secondary Ion Mass Spectrometry

Cited by 28 publications

References 46 publications

Laser ablation mass spectrometry of inorganic transition metal compounds. Additional knowledge for the understanding of ion formation

Laser ablation mass spectrometry of inorganic transition metal compounds. Additional knowledge for the understanding of ion formation

Applications of SIMS to cultural heritage studies

Static secondary ion mass spectrometry (S-SIMS) for the characterization of surface components in mineral particulates

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