У оквиру семинара Института за физику у Београду, у петак, 14. августа 2026. године у 12 часова у читаоници библиотеке „Др Драган Поповић“, др Александар Милосављевић (Синхротрон Soleil, Француска) одржаће предавање:
On-the-fly soft X-ray spectroscopies of isolated and solvated nanoparticles: probing metal–molecule interfaces on plasmonic nanoparticles and exploring new photovoltaic nanomaterials
САЖЕТАК:
A state-of-the-art experimental setup at the PLEIADES beamline (SOLEIL Synchrotron, France) for X-ray Aerosol Photoelectron Spectroscopy (XAPS) of nanoparticles isolated in vacuum will be presented [1,2]. The nanoparticle beam is generated from a colloidal solution, focused by an aerodynamic lens, and crossed with the photon beam in front of a hemispherical analyzer. This arrangement offers several advantages over table-top techniques: it completely avoids substrate influence and radiation damage, allows direct alignment to the vacuum level [3], and enables depth profiling via tunable photon energy. Moreover, using soft X-rays provides exceptional sensitivity to the nanoparticle surface.
I will present and discuss recent results related to the electronic structure of new photovoltaic materials [2] and light-induced chemistry on functionalized metallic plasmonic nanomaterials [4]. I will briefly discuss perspectives on combining XAPS with liquid jet spectroscopy on PLEIADES, utilizing mass/charge-selected X-ray spectroscopy to investigate ligands alone, and probing light-activated nanoparticles in situ.
This activity is supported by the Science Fund of the Republic of Serbia, #Grant No. 230, Aerosols of copper-silver based nanomaterials for absorbers in solar cells – Aerosol4solar.
References
1. Sublemontier, C. Nicolas et al, Journal of Physical Chemistry Letters., 5(19): 3399–3403. (2014)
2. Danilovic et al, Journal of Physical Chemistry C., 124(43): 23930 (2020)
3. Milosavljevic et al, J. Phys. Chem. Lett. 9, 3604 (2018)
4. Ilko Bald, Advances in Atomic and Molecular Physics at the Interfaces with the Natural Sciences, Technology and Medicine, pp. 165-190 (2026)