Quantitative characterization of the lateral distribution of gold nanoparticles in polystyrene nanocomposite thin films by laser-induced breakdown spectroscopy elemental mapping

Casian-Plaza, F.A. and Urbán, O. and Bélteki, Á. and Aladi, M. and Kedves, M. and Bonyár, A. and Kopniczky, J. and Veres, M. and Galbács, Gábor (2025) Quantitative characterization of the lateral distribution of gold nanoparticles in polystyrene nanocomposite thin films by laser-induced breakdown spectroscopy elemental mapping. APPLIED SURFACE SCIENCE. ISSN 0169-4332

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Abstract

An analytical method based on nanosecond-pulse laser-induced breakdown spectroscopy elemental mapping was developed and tested for the assessment of the quantitative lateral distribution of nanoparticles in polymer nanocomposite thin films. A study of the effect of measurement conditions was carried out and the laser ablation behaviour of polystyrene thin films was also studied. It was established that using 266 nm laser wavelength and laser pulse energies upwards from 10 mJ, the method is applicable for the analysis of polystyrene thin films less than about 450 nm in thickness and for gold mass concentrations in the range of about 3 to 700 ng·mm−2. The capabilities of the method were also demonstrated in applications in which quantitative imaging of patterned samples with gold nanoparticle concentration gradients was done with 10 % or less error. It was also demonstrated that the method can also provide particle concentration distribution data in practical cases when the size of the nanoparticles is known. The method is especially useful in cases when fairly large areas (cm2 or larger) need to be analyzed with a spatial resolution of 100 μm or better, and its advantage is that it can also be adapted to any shape or composition of nanoparticles.

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