Publication detail

Laser-Induced Breakdown Spectroscopy as a Novel Readout Method for Nanoparticle-Based Immunoassays

MODLITBOVÁ, P. FARKA, Z. PASTUCHA, M. POŘÍZKA, P. NOVOTNÝ, K. SKLÁDAL, P. KAISER, J.

Original Title

Laser-Induced Breakdown Spectroscopy as a Novel Readout Method for Nanoparticle-Based Immunoassays

Type

journal article in Web of Science

Language

English

Original Abstract

Laser-induced breakdown spectroscopy (LIBS) was examined as a novel method for readout of microtiter plate immunoassays involving nanoparticles (NP). The so-called Tag-LIBS technique is a sensitive method for the detection of specific biomarkers. It was applied to the determination of NP labels using nanosecond ablation sampling. The NP labels were examined from the bottom of a standard 96-well microtiter plate. Thanks to the flexibility of LIBS instrumentation, both the plasma emission collection and the focusing optics arrangements can be collinearly arranged. The experiments showed that silver NPs and gold NPs can be readily quantified on the bottom of the microtiter plate. Utilizing this technique, a sandwich immunoassay for human serum albumin using streptavidin-coated AgNP labels was developed. The assay has a 10 ng·mL−1 detection limit which is comparable to the sensitivity of fluorometric readout. The main advantage of this LIBS technique is its wide scope in which it enables a detection of almost any type of NP labels, irrespective to any fluorescence or catalytic properties. Owing to the immediate signal response, the relatively simple instrumentation also enables assay automation. The LIBS capability of multi-elemental analyses makes it a promising and fast alternative to other readout techniques, in particular with respect to multiplexed detection of biomarkers.

Keywords

collinear plasma collection, gold nanoparticles, laser ablation, microtiter plate, sandwich immunoassay, silver nanoparticles, streptavidin, Tag-LIBS

Authors

MODLITBOVÁ, P.; FARKA, Z.; PASTUCHA, M.; POŘÍZKA, P.; NOVOTNÝ, K.; SKLÁDAL, P.; KAISER, J.

Released

1. 9. 2019

Publisher

Springer-Verlag GmbH Austria, part of Springer Nature 2019

ISBN

0026-3672

Periodical

Microchimica Acta

Number

629

State

Republic of Austria

Pages from

186

Pages to

196

Pages count

10

URL

https://link.springer.com/article/10.1007%2Fs00604-019-3742-9

BibTex

@article{BUT157993,
  author="MODLITBOVÁ, P. and FARKA, Z. and PASTUCHA, M. and POŘÍZKA, P. and NOVOTNÝ, K. and SKLÁDAL, P. and KAISER, J.",
  title="Laser-Induced Breakdown Spectroscopy as a Novel Readout Method for Nanoparticle-Based Immunoassays",
  journal="Microchimica Acta",
  year="2019",
  number="629",
  pages="186--196",
  doi="10.1007/s00604-019-3742-9",
  issn="0026-3672",
  url="https://link.springer.com/article/10.1007%2Fs00604-019-3742-9"
}