In-situ characterization of nanoparticle beams focused with an aerodynamic lens by Laser-Induced Breakdown Detection

Barreda, Flory-Anne; Nicolas, Christophe; Sirven, Jean-Baptiste; Ouf, François Xavier; Lacour, Jean-Luc; Robert, E.; Benkoula, S.; Yon, Jérôme; Miron, Catalin; Sublemontier, O.

doi:10.1038/srep15696

Cited by 11 publications

(15 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A 3 mm diameter skimmer at the output beam of the ADLS contributes to the separation of the diverging carrier gas from the collimated nanoparticle flow and ensures the good vacuum in the interaction chamber required for the XPS detection system (< 10 -5 mbar). The nanoparticle beam diameter is expected 57 to be < 230 µm. This aerosol setup is therefore used to (i) efficiently extract the nanoparticles from their liquid environment and (ii) achieve a sufficiently high particle density (10 6 particles/cm 3 ) at the interaction point with the synchrotron radiation beam, enabling their detection within a reasonable accumulation time (less than 2 hours for the present experimental results).…”

Section: Nanoparticle Beam Generation: Aerodynamic Lens Systemmentioning

confidence: 99%

Assessing the Surface Oxidation State of Free-Standing Gold Nanoparticles Produced by Laser Ablation

et al. 2019

View full text Add to dashboard Cite

Surface chemistry of gold nanoparticles produced by pulsed laser ablation in liquids method is investigated by X-ray Photoelectron Spectroscopy (XPS). The presence of surface oxide expected on these systems is investigated using synchrotron radiation in conditions close to their original state in solvent, but free from substrate or solvent effects which could affect the interpretation of spectroscopic observations. For that purpose, we performed the experiment on a controlled free-standing nanoparticle beam produced by the combination of an atomizer and an aerodynamic lens system. These results are compared with those obtained by the standard situation of deposited nanoparticles on silicon substrate. An accurate analysis based on Bayesian statistics concludes that the existence of oxide in the free-standing conditions cannot be solely confirmed by the recorded core-level 4f spectra. If present, our data indicate an upper limit of 2.15 ± 0.68 % of oxide. However, a higher credence to the hypothesis of its existence is brought by the structureless valence profile of the free-standing beam. Moreover, the cross-comparison with the deposited nanoparticles case clearly evidences an important misleading substrate effect. Experiment with free-standing nanoparticles is then demonstrated to be the right way to further investigate oxidation states on Au-NP.

show abstract

Section: Nanoparticle Beam Generation: Aerodynamic Lens Systemmentioning

confidence: 99%

Assessing the Surface Oxidation State of Free-Standing Gold Nanoparticles Produced by Laser Ablation

et al. 2019

View full text Add to dashboard Cite

show abstract

“…More recently, Sublemontier et al 31 and Benkoula et al 32 have investigated the oxidation state of silicon nanoparticles and the hydration properties of TiO 2 nanoparticles, respectively. They both have used an ADLS device recently designed33 and characterized34 at the PLEIADES beamline of SOLEIL, the French synchrotron radiation facility. In the present work, we have adapted this device to study carbon soot particles, in order to demonstrate the feasibility of in-flight NEXAFS and XPS analysis of this kind of aerosol.…”

mentioning

confidence: 99%

First in-flight synchrotron X-ray absorption and photoemission study of carbon soot nanoparticles

Ouf

Parent

Laffon

et al. 2016

Sci Rep

Self Cite

View full text Add to dashboard Cite

Many studies have been conducted on the environmental impacts of combustion generated aerosols. Due to their complex composition and morphology, their chemical reactivity is not well understood and new developments of analysis methods are needed. We report the first demonstration of in-flight X-ray based characterizations of freshly emitted soot particles, which is of paramount importance for understanding the role of one of the main anthropogenic particulate contributors to global climate change. Soot particles, produced by a burner for several air-to-fuel ratios, were injected through an aerodynamic lens, focusing them to a region where they interacted with synchrotron radiation. X-ray photoelectron spectroscopy and carbon K-edge near-edge X-ray absorption spectroscopy were performed and compared to those obtained for supported samples. A good agreement is found between these samples, although slight oxidation is observed for supported samples. Our experiments demonstrate that NEXAFS characterization of supported samples provides relevant information on soot composition, with limited effects of contamination or ageing under ambient storage conditions. The highly surface sensitive XPS experiments of airborne soot indicate that the oxidation is different at the surface as compared to the bulk probed by NEXAFS. We also report changes in soot’s work function obtained at different combustion conditions.

show abstract

“…With this optical configuration, we introduce the effective volume Veff, defined as the portion of the interaction region where the laser irradiance is higher or equal to the breakdown threshold irradiance of a particle. A breakdown threshold irradiance of 5.7 GW/cm 2 was previously estimated with similar silicon nanoparticles [6]. This value is quite high compared to what is usually observed for solid targets.…”

Section: Laser-induced Breakdown Spectroscopymentioning

confidence: 50%

“…This equipment has already been used for nanoparticle studies in the gas phase by interaction with synchrotron radiation [5]. Laser-Induced Breakdown Detection (LIBD) has also been used to probe nanoparticle beam profiles from an ADLS [6]. Beam diameters of less than 100 µm were measured with silicon nanoparticles at a distance of 20 cm from the ADLS outlet.…”

Section: Nanoparticle Beam Generationmentioning

confidence: 99%

See 1 more Smart Citation

On-line Monitoring of Nanoparticle Synthesis by Laser-Induced Breakdown Spectroscopy in Vacuum

2016

View full text Add to dashboard Cite

International audienceWe propose a new technique suitable for on-line monitoring of gas phase synthesis of nanoparticles. It is based on aerodynamic focusing of nanoparticles followed by Laser-Induced Breakdown Spectroscopy (LIBS) under vacuum. The laser crosses a beam of particles at low pressure so that the plasma-produced photons to be analyzed are emitted only from the particles. Unlike previous experiments, the background from interaction with the gaseous component is totally eliminated from the collected spectra. Vacuum allows also for easier spectra collection in the UV range. Moreover, as the nanoparticle beam is highly collimated, the optical interface windows are not obstructed by particle deposition and the system can be kept running for hours

show abstract

In-situ characterization of nanoparticle beams focused with an aerodynamic lens by Laser-Induced Breakdown Detection

Cited by 11 publications

References 40 publications

Assessing the Surface Oxidation State of Free-Standing Gold Nanoparticles Produced by Laser Ablation

Assessing the Surface Oxidation State of Free-Standing Gold Nanoparticles Produced by Laser Ablation

First in-flight synchrotron X-ray absorption and photoemission study of carbon soot nanoparticles

On-line Monitoring of Nanoparticle Synthesis by Laser-Induced Breakdown Spectroscopy in Vacuum

Contact Info

Product

Resources

About