Detail publikace

Feasibility of Nanoparticle-Enhanced Laser Ablation Inductively Coupled Plasma Mass Spectrometry

Originální název

Feasibility of Nanoparticle-Enhanced Laser Ablation Inductively Coupled Plasma Mass Spectrometry

Anglický název

Feasibility of Nanoparticle-Enhanced Laser Ablation Inductively Coupled Plasma Mass Spectrometry

Jazyk

en

Originální abstrakt

Nanoparticles (NPs) applied to the surface of some solids can increase signals in inductively coupled plasma mass spectrometry (ICPMS). Drops containing 20 and/or 40 nm nanoparticles of Ag and/or Au were deposited on metallic and ceramic/glass samples, and after being dried, both the samples treated with NPs and plain targets were ablated by one pulse per spot. The laser ablation ICPMS (LAICPMS) signals were enhanced for metallic samples modified with NPs in comparison to signals produced at the plain, untreated surface. Maps of LAICPMS signals recorded for several laser fluences show that the NP-induced signal enhancement exceeds even 2 orders of magnitude for metallic samples. No enhancement was achieved for nonconductive samples. This enhancement is limited to the peripheral annular region of the dried droplet area where NPs are concentrated due to the “coffee stain” effect. Ablation crater profilometric inspection revealed a more uniform material rearrangement over the NP-treated surface compared with the ablated plain target. However, besides a smoother crater bottom, no other evidence of an NP-enhancing effect was noticed, although an increased ablation rate was anticipated. Limits of detection dropped by 1 order of magnitude for the minor elements in the presence of NPs. Observed phenomena depend only on the NP surface concentration but not on the material or size of the NPs. An electron microprobe study of the collected ablation aerosol has shown that aerosol particles consisting of target material are aggregated around the NPs. The hypothesis is that such aggregates exhibit better transport vaporization efficiency, thus enhancing signals for metallic samples. A detailed study of the suggested mechanism will be continued in ongoing work.

Anglický abstrakt

Nanoparticles (NPs) applied to the surface of some solids can increase signals in inductively coupled plasma mass spectrometry (ICPMS). Drops containing 20 and/or 40 nm nanoparticles of Ag and/or Au were deposited on metallic and ceramic/glass samples, and after being dried, both the samples treated with NPs and plain targets were ablated by one pulse per spot. The laser ablation ICPMS (LAICPMS) signals were enhanced for metallic samples modified with NPs in comparison to signals produced at the plain, untreated surface. Maps of LAICPMS signals recorded for several laser fluences show that the NP-induced signal enhancement exceeds even 2 orders of magnitude for metallic samples. No enhancement was achieved for nonconductive samples. This enhancement is limited to the peripheral annular region of the dried droplet area where NPs are concentrated due to the “coffee stain” effect. Ablation crater profilometric inspection revealed a more uniform material rearrangement over the NP-treated surface compared with the ablated plain target. However, besides a smoother crater bottom, no other evidence of an NP-enhancing effect was noticed, although an increased ablation rate was anticipated. Limits of detection dropped by 1 order of magnitude for the minor elements in the presence of NPs. Observed phenomena depend only on the NP surface concentration but not on the material or size of the NPs. An electron microprobe study of the collected ablation aerosol has shown that aerosol particles consisting of target material are aggregated around the NPs. The hypothesis is that such aggregates exhibit better transport vaporization efficiency, thus enhancing signals for metallic samples. A detailed study of the suggested mechanism will be continued in ongoing work.

Dokumenty

BibTex


@article{BUT150321,
  author="Markéta {Holá} and Zita {Salajková} and Aleš {Hrdlička} and Pavel {Pořízka} and Karel {Novotný} and Ladislav {Čelko} and Petr {Šperka} and David {Prochazka} and Jan {Novotný} and Pavlína {Modlitbová} and Viktor {Kanický} and Jozef {Kaiser}",
  title="Feasibility of Nanoparticle-Enhanced Laser Ablation
Inductively Coupled Plasma Mass Spectrometry",
  annote="Nanoparticles (NPs) applied to the surface of some solids can increase signals in inductively
coupled plasma mass spectrometry (ICPMS). Drops containing 20 and/or 40 nm
nanoparticles of Ag and/or Au were deposited on metallic and ceramic/glass samples, and
after being dried, both the samples treated with NPs and plain targets were ablated by one
pulse per spot. The laser ablation ICPMS (LAICPMS) signals were enhanced for
metallic samples modified with NPs in comparison to signals produced at the plain, untreated
surface. Maps of LAICPMS signals recorded for several laser fluences show that
the NP-induced signal enhancement exceeds even 2 orders of magnitude for metallic
samples. No enhancement was achieved for nonconductive samples. This
enhancement is limited to the peripheral annular region of the dried droplet area where NPs are
concentrated due to the “coffee stain” effect. Ablation crater profilometric inspection revealed
a more uniform material rearrangement over the NP-treated surface compared with the
ablated plain target. However, besides a smoother crater bottom, no other evidence of an
NP-enhancing effect was noticed, although an increased ablation rate was anticipated. Limits
of detection dropped by 1 order of magnitude for the minor elements in the presence of
NPs. Observed phenomena depend only on the NP surface concentration but not on the
material or size of the NPs. An electron microprobe study of the collected ablation
aerosol has shown that aerosol particles consisting of target material are aggregated around the
NPs. The hypothesis is that such aggregates exhibit better transport vaporization
efficiency, thus enhancing signals for metallic samples. A detailed study of the suggested
mechanism will be continued in ongoing work.",
  address="Anal. Chem., Article ASAP",
  chapter="150321",
  doi="10.1021/acs.analchem.8b01197",
  howpublished="online",
  institution="Anal. Chem., Article ASAP",
  number="8",
  year="2018",
  month="august",
  pages="1--6",
  publisher="Anal. Chem., Article ASAP",
  type="journal article in Web of Science"
}