Experimental determination of the temperature range of AlO molecular emission in laser-induced aluminum plasma in air

Bai, Xueshi; Motto-Ros, Vincent; Lei, Wenhua; Zheng, Lijuan; Yu, Jianhua

doi:10.1016/j.sab.2014.07.004

Cited by 50 publications

(57 citation statements)

References 18 publications

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“…AlO: the spectrum of aluminium monoxide is illustrated in Figure 14. This spectrum is actually important for plasma diagnostics [171,172]. Rather remarkably, the only previous AlO line list [173], which was prepared for plasma studies, only provided relative as opposed to absolute line intensities.…”

Section: Hcn: the Line List Shown Inmentioning

confidence: 99%

The ExoMol Atlas of Molecular Opacities

Tennyson

Yurchenko

2018

Atoms

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Abstract:The ExoMol project is dedicated to providing molecular line lists for exoplanet and other hot atmospheres. The ExoMol procedure uses a mixture of ab initio calculations and available laboratory data. The actual line lists are generated using variational nuclear motion calculations. These line lists form the input for opacity models for cool stars and brown dwarfs as well as for radiative transport models involving exoplanets. This paper is a collection of molecular opacities for 52 molecules (130 isotopologues) at two reference temperatures, 300 K and 2000 K, using line lists from the ExoMol database. So far, ExoMol line lists have been generated for about 30 key molecular species. Other line lists are taken from external sources or from our work predating the ExoMol project. An overview of the line lists generated by ExoMol thus far is presented and used to evaluate further molecular data needs. Other line lists are also considered. The requirement for completeness within a line list is emphasized and needs for further line lists discussed.

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Section: Hcn: the Line List Shown Inmentioning

confidence: 99%

The ExoMol Atlas of Molecular Opacities

Tennyson

Yurchenko

2018

Atoms

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“…The determination of temperature is frequently of primary concern for description of the plasma and/or chemical state. Laser ablation and/or combustion of aluminum together with occurrence of aluminum monoxide [13,14], titanium laser ablation and occurrence of titanium monoxide [15], and/or laser-induced breakdown spectroscopy of carbon containing samples in air typically lead to cyanide [16,17] and diatomic carbon spectra [18]. For these reasons, it is important to have an accurate method of computing molecular spectra.…”

Section: Introductionmentioning

confidence: 99%

Computation of diatomic molecular spectra for selected transitions of aluminum monoxide, cyanide, diatomic carbon, and titanium monoxide

Parigger

Woods

Surmick

et al. 2015

Spectrochimica Acta Part B: Atomic Spectroscopy

112

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“…Molecular bands are formed when electron impact processes are not dominant anymore, such that collisions between the plasma particles, and surrounding background gas start to play an important role [1]. If we consider the formation of AlO molecules, from a thermodynamic point of view, they are mainly resulting from the following reaction [13]:…”

Section: Resultsmentioning

confidence: 99%

“…The reaction described in Eq.1a is spontaneous for all temperature ranges (G<0), while the reaction of Eq.1b is spontaneous only for T lower than 3000 K and is in competition with the formation of O2 [13]. For this reason the contribution of Eq.1b can be neglected, so that the rate of AlO production is given by:…”

Section: Resultsmentioning

confidence: 99%

Nanoparticle Enhanced Laser Induced Breakdown Spectroscopy for Improving the Detection of Molecular Bands

Koral

Giacomo

Mao

et al. 2016

Spectrochimica Acta Part B: Atomic Spectroscopy

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Enhancement of molecular band emission in laser-induced plasmas is important for improving sensitivity and limits of detection in molecular sensing and molecular isotope analysis. In this work we introduce the use of Nanoparticle Enhanced Laser Induced Breakdown (NELIBS) for the enhancement of molecular band emission in laser-induced plasmas, and study the underlying mechanisms responsible for the observed enhancement. The use of Ag nanoparticles leads to an order of magnitude enhancement for AlO (B2Σ+ → Χ+ Σ+) system emission from an Al-based alloy. We demonstrate that the mechanism responsible for the enhancement of molecular bands differs from that of atomic emission, and can be traced down to the increased number of atomic species in NELIBS which lead to AlO molecular formation. These findings showcase the potential of NELIBS as a simple and viable technology for enhancing molecular band emission in laser-induced plasmas

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Experimental determination of the temperature range of AlO molecular emission in laser-induced aluminum plasma in air

Cited by 50 publications

References 18 publications

The ExoMol Atlas of Molecular Opacities

The ExoMol Atlas of Molecular Opacities

Computation of diatomic molecular spectra for selected transitions of aluminum monoxide, cyanide, diatomic carbon, and titanium monoxide

Nanoparticle Enhanced Laser Induced Breakdown Spectroscopy for Improving the Detection of Molecular Bands

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