TY  - JOUR
AU  - Danilović, Danijela
AU  - Božanić, Dušan K.
AU  - Garcia, Gustavo A.
AU  - Nahon, Laurent
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Đoković, Vladimir
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10385
AB  - The angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles was carried out by using velocity map imaging technique at the DESIRS beamline of SOLEIL synchrotron facility. The reported spectroscopy results were obtained after interaction of the synchrotron radiation with a polydisperse aerosol produced from aqueous dispersion of silver sulfide particles, approximately 16 nm in diameter. The photoelectron and UV–Vis-NIR absorption spectra were used to estimate the maximum energy of the valance- and the minimum energy of the conduction-band of the nanoparticles. With respect to the vacuum level, the obtained values were found to be 5.5 ± 0.1 eV and 4.5 ± 0.1 eV for the valence band maximum and conduction band minimum, respectively. The dependence of the asymmetry parameter on the electron energy along the silver sulfide valence band showed an onset of inelastic scattering at ~ 1 eV electron kinetic energy.
T2  - Optical and Quantum Electronics
T1  - Velocity map imaging VUV angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles
VL  - 54
IS  - 9
SP  - 604
DO  - 10.1007/s11082-022-03972-6
ER  - 

@article{
author = "Danilović, Danijela and Božanić, Dušan K. and Garcia, Gustavo A. and Nahon, Laurent and Stamenović, Una and Vodnik, Vesna and Đoković, Vladimir",
year = "2022",
abstract = "The angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles was carried out by using velocity map imaging technique at the DESIRS beamline of SOLEIL synchrotron facility. The reported spectroscopy results were obtained after interaction of the synchrotron radiation with a polydisperse aerosol produced from aqueous dispersion of silver sulfide particles, approximately 16 nm in diameter. The photoelectron and UV–Vis-NIR absorption spectra were used to estimate the maximum energy of the valance- and the minimum energy of the conduction-band of the nanoparticles. With respect to the vacuum level, the obtained values were found to be 5.5 ± 0.1 eV and 4.5 ± 0.1 eV for the valence band maximum and conduction band minimum, respectively. The dependence of the asymmetry parameter on the electron energy along the silver sulfide valence band showed an onset of inelastic scattering at ~ 1 eV electron kinetic energy.",
journal = "Optical and Quantum Electronics",
title = "Velocity map imaging VUV angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles",
volume = "54",
number = "9",
pages = "604",
doi = "10.1007/s11082-022-03972-6"
}

Danilović, D., Božanić, D. K., Garcia, G. A., Nahon, L., Stamenović, U., Vodnik, V.,& Đoković, V.. (2022). Velocity map imaging VUV angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles. in Optical and Quantum Electronics, 54(9), 604.
https://doi.org/10.1007/s11082-022-03972-6

Danilović D, Božanić DK, Garcia GA, Nahon L, Stamenović U, Vodnik V, Đoković V. Velocity map imaging VUV angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles. in Optical and Quantum Electronics. 2022;54(9):604.
doi:10.1007/s11082-022-03972-6 .

Danilović, Danijela, Božanić, Dušan K., Garcia, Gustavo A., Nahon, Laurent, Stamenović, Una, Vodnik, Vesna, Đoković, Vladimir, "Velocity map imaging VUV angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles" in Optical and Quantum Electronics, 54, no. 9 (2022):604,
https://doi.org/10.1007/s11082-022-03972-6 . .

TY  - JOUR
AU  - Hartweg, Sebastian
AU  - Garcia, Gustavo A.
AU  - Božanić, Dušan K.
AU  - Nahon, Laurent
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9155
AB  - Structural changes at the molecular level, occurring at the onset of condensation, can be probed by angle-resolved valence photoelectron spectroscopy, which is inherently sensitive to the electronic structure. For larger condensed systems like aerosol particles, the observation of intrinsic angular anisotropies in photoemission (β parameters) is challenging due to the strong reduction of their magnitude by electron transport effects. Here, we use a less common, more sensitive observable in the form of the chiral asymmetry parameter to perform a comparative study of the VUV photoelectron spectroscopy and photoelectron circular dichroism (PECD) between pure gas phase enantiomers of the amino acid serine and their corresponding homochiral nanoparticles. We observe a relatively large (1%) and strongly kinetic energy-dependent asymmetry, discussed in terms of the emergence of local order and conformational changes potentially counterbalancing the loss of angular information due to electron transport scattering. This demonstrates the potential of PECD as a sensitive probe of the condensation effects from the gas phase to bulk-like chiral aerosol particles surpassing the potential of conventional photoemission observables such as β parameters. ©
T2  - The Journal of Physical Chemistry Letters
T1  - Condensation Effects on Electron Chiral Asymmetries in the Photoionization of Serine: From Free Molecules to Nanoparticles
VL  - 12
IS  - 9
SP  - 2385
EP  - 2393
DO  - 10.1021/acs.jpclett.1c00258
ER  - 

@article{
author = "Hartweg, Sebastian and Garcia, Gustavo A. and Božanić, Dušan K. and Nahon, Laurent",
year = "2021",
abstract = "Structural changes at the molecular level, occurring at the onset of condensation, can be probed by angle-resolved valence photoelectron spectroscopy, which is inherently sensitive to the electronic structure. For larger condensed systems like aerosol particles, the observation of intrinsic angular anisotropies in photoemission (β parameters) is challenging due to the strong reduction of their magnitude by electron transport effects. Here, we use a less common, more sensitive observable in the form of the chiral asymmetry parameter to perform a comparative study of the VUV photoelectron spectroscopy and photoelectron circular dichroism (PECD) between pure gas phase enantiomers of the amino acid serine and their corresponding homochiral nanoparticles. We observe a relatively large (1%) and strongly kinetic energy-dependent asymmetry, discussed in terms of the emergence of local order and conformational changes potentially counterbalancing the loss of angular information due to electron transport scattering. This demonstrates the potential of PECD as a sensitive probe of the condensation effects from the gas phase to bulk-like chiral aerosol particles surpassing the potential of conventional photoemission observables such as β parameters. ©",
journal = "The Journal of Physical Chemistry Letters",
title = "Condensation Effects on Electron Chiral Asymmetries in the Photoionization of Serine: From Free Molecules to Nanoparticles",
volume = "12",
number = "9",
pages = "2385-2393",
doi = "10.1021/acs.jpclett.1c00258"
}

Hartweg, S., Garcia, G. A., Božanić, D. K.,& Nahon, L.. (2021). Condensation Effects on Electron Chiral Asymmetries in the Photoionization of Serine: From Free Molecules to Nanoparticles. in The Journal of Physical Chemistry Letters, 12(9), 2385-2393.
https://doi.org/10.1021/acs.jpclett.1c00258

Hartweg S, Garcia GA, Božanić DK, Nahon L. Condensation Effects on Electron Chiral Asymmetries in the Photoionization of Serine: From Free Molecules to Nanoparticles. in The Journal of Physical Chemistry Letters. 2021;12(9):2385-2393.
doi:10.1021/acs.jpclett.1c00258 .

Hartweg, Sebastian, Garcia, Gustavo A., Božanić, Dušan K., Nahon, Laurent, "Condensation Effects on Electron Chiral Asymmetries in the Photoionization of Serine: From Free Molecules to Nanoparticles" in The Journal of Physical Chemistry Letters, 12, no. 9 (2021):2385-2393,
https://doi.org/10.1021/acs.jpclett.1c00258 . .

TY  - JOUR
AU  - Hadidi, Rim
AU  - Božanić, Dušan K.
AU  - Ganjitabar, Hassan
AU  - Garcia, Gustavo A.
AU  - Powis, Ivan
AU  - Nahon, Laurent
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9814
AB  - Proline is a unique amino-acid, with a secondary amine fixed within a pyrrolidine ring providing specific structural properties to proline-rich biopolymers. Gas-phase proline possesses four main H-bond stabilized conformers differing by the ring puckering and carboxylic acid orientation. The latter defines two classes of conformation, whose large ionization energy difference allows a unique conformer-class tagging via electron spectroscopy. Photoelectron circular dichroism (PECD) is an intense chiroptical effect sensitive to molecular structures, hence theorized to be highly conformation-dependent. Here, we present experimental evidence of an intense and striking conformer-specific PECD, measured in the vacuum ultraviolet (VUV) photoionization of proline, as well as a conformer-dependent cation fragmentation behavior. This finding, combined with theoretical modeling, allows a refinement of the conformational landscape and energetic ordering, that proves inaccessible to current molecular electronic structure calculations. Additionally, astrochemical implications regarding a possible link of PECD to the origin of life’s homochirality are considered in terms of plausible temperature constraints.
T2  - Communications Chemistry
T1  - Conformer-dependent vacuum ultraviolet photodynamics and chiral asymmetries in pure enantiomers of gas phase proline
VL  - 4
IS  - 1
SP  - 1
EP  - 14
DO  - 10.1038/s42004-021-00508-z
ER  - 

@article{
author = "Hadidi, Rim and Božanić, Dušan K. and Ganjitabar, Hassan and Garcia, Gustavo A. and Powis, Ivan and Nahon, Laurent",
year = "2021",
abstract = "Proline is a unique amino-acid, with a secondary amine fixed within a pyrrolidine ring providing specific structural properties to proline-rich biopolymers. Gas-phase proline possesses four main H-bond stabilized conformers differing by the ring puckering and carboxylic acid orientation. The latter defines two classes of conformation, whose large ionization energy difference allows a unique conformer-class tagging via electron spectroscopy. Photoelectron circular dichroism (PECD) is an intense chiroptical effect sensitive to molecular structures, hence theorized to be highly conformation-dependent. Here, we present experimental evidence of an intense and striking conformer-specific PECD, measured in the vacuum ultraviolet (VUV) photoionization of proline, as well as a conformer-dependent cation fragmentation behavior. This finding, combined with theoretical modeling, allows a refinement of the conformational landscape and energetic ordering, that proves inaccessible to current molecular electronic structure calculations. Additionally, astrochemical implications regarding a possible link of PECD to the origin of life’s homochirality are considered in terms of plausible temperature constraints.",
journal = "Communications Chemistry",
title = "Conformer-dependent vacuum ultraviolet photodynamics and chiral asymmetries in pure enantiomers of gas phase proline",
volume = "4",
number = "1",
pages = "1-14",
doi = "10.1038/s42004-021-00508-z"
}

Hadidi, R., Božanić, D. K., Ganjitabar, H., Garcia, G. A., Powis, I.,& Nahon, L.. (2021). Conformer-dependent vacuum ultraviolet photodynamics and chiral asymmetries in pure enantiomers of gas phase proline. in Communications Chemistry, 4(1), 1-14.
https://doi.org/10.1038/s42004-021-00508-z

Hadidi R, Božanić DK, Ganjitabar H, Garcia GA, Powis I, Nahon L. Conformer-dependent vacuum ultraviolet photodynamics and chiral asymmetries in pure enantiomers of gas phase proline. in Communications Chemistry. 2021;4(1):1-14.
doi:10.1038/s42004-021-00508-z .

Hadidi, Rim, Božanić, Dušan K., Ganjitabar, Hassan, Garcia, Gustavo A., Powis, Ivan, Nahon, Laurent, "Conformer-dependent vacuum ultraviolet photodynamics and chiral asymmetries in pure enantiomers of gas phase proline" in Communications Chemistry, 4, no. 1 (2021):1-14,
https://doi.org/10.1038/s42004-021-00508-z . .

TY  - JOUR
AU  - Božanić, Dušan K.
AU  - Garcia, Gustavo A.
AU  - Sublemontier, Olivier
AU  - Pajović, Jelena
AU  - Đoković, Vladimir
AU  - Nahon, Laurent
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9727
AB  - We present an angle-resolved photoelectron spectroscopy study on isolated gold nanoparticles in the photon energy range between 6 and 12 eV performed at the DESIRS beamline of Synchrotron SOLEIL with a velocity map imaging spectrometer. The data are reported for polydisperse gold aerosols formed from hydrocolloids of bare and citrate-capped primary nanoparticles. The aerosols were brought to interact with the synchrotron radiation via a high-performance aerodynamic lens system developed for this study. The electronic structure of the aerosols was elucidated by threshold photoemission spectroscopy, which showed excellent agreement with the theoretical density of states. The photoionization cross sections of isolated gold particles were derived in the ∼104 to 106 Mb range between 8 and 12 eV. We introduce a new methodology to extract all of the photoemission observables from the electron images as a function of electron energy, including photoelectron spectrum, anisotropy parameter b2, and asymmetry parameter, α(E), which describes the shadowing asymmetry along the radiation propagation axis. The results show that electron energy distribution depends on the procedure used in the synthesis of the nanoparticles and on the ligand concentration. The dependence of the asymmetry parameter on electron energy along the valence band is rationalized through theoretical modeling in terms of the electric field distribution inside the particle and the losses due to inelastic scattering.
T2  - The Journal of Physical Chemistry C
T1  - Velocity Map Imaging VUV Angle-Resolved Photoemission on Isolated Nanosystems: Case of Gold Nanoparticles
VL  - 124
IS  - 44
SP  - 24500
EP  - 24512
DO  - 10.1021/acs.jpcc.0c08152
ER  - 

@article{
author = "Božanić, Dušan K. and Garcia, Gustavo A. and Sublemontier, Olivier and Pajović, Jelena and Đoković, Vladimir and Nahon, Laurent",
year = "2020",
abstract = "We present an angle-resolved photoelectron spectroscopy study on isolated gold nanoparticles in the photon energy range between 6 and 12 eV performed at the DESIRS beamline of Synchrotron SOLEIL with a velocity map imaging spectrometer. The data are reported for polydisperse gold aerosols formed from hydrocolloids of bare and citrate-capped primary nanoparticles. The aerosols were brought to interact with the synchrotron radiation via a high-performance aerodynamic lens system developed for this study. The electronic structure of the aerosols was elucidated by threshold photoemission spectroscopy, which showed excellent agreement with the theoretical density of states. The photoionization cross sections of isolated gold particles were derived in the ∼104 to 106 Mb range between 8 and 12 eV. We introduce a new methodology to extract all of the photoemission observables from the electron images as a function of electron energy, including photoelectron spectrum, anisotropy parameter b2, and asymmetry parameter, α(E), which describes the shadowing asymmetry along the radiation propagation axis. The results show that electron energy distribution depends on the procedure used in the synthesis of the nanoparticles and on the ligand concentration. The dependence of the asymmetry parameter on electron energy along the valence band is rationalized through theoretical modeling in terms of the electric field distribution inside the particle and the losses due to inelastic scattering.",
journal = "The Journal of Physical Chemistry C",
title = "Velocity Map Imaging VUV Angle-Resolved Photoemission on Isolated Nanosystems: Case of Gold Nanoparticles",
volume = "124",
number = "44",
pages = "24500-24512",
doi = "10.1021/acs.jpcc.0c08152"
}

Božanić, D. K., Garcia, G. A., Sublemontier, O., Pajović, J., Đoković, V.,& Nahon, L.. (2020). Velocity Map Imaging VUV Angle-Resolved Photoemission on Isolated Nanosystems: Case of Gold Nanoparticles. in The Journal of Physical Chemistry C, 124(44), 24500-24512.
https://doi.org/10.1021/acs.jpcc.0c08152

Božanić DK, Garcia GA, Sublemontier O, Pajović J, Đoković V, Nahon L. Velocity Map Imaging VUV Angle-Resolved Photoemission on Isolated Nanosystems: Case of Gold Nanoparticles. in The Journal of Physical Chemistry C. 2020;124(44):24500-24512.
doi:10.1021/acs.jpcc.0c08152 .

Božanić, Dušan K., Garcia, Gustavo A., Sublemontier, Olivier, Pajović, Jelena, Đoković, Vladimir, Nahon, Laurent, "Velocity Map Imaging VUV Angle-Resolved Photoemission on Isolated Nanosystems: Case of Gold Nanoparticles" in The Journal of Physical Chemistry C, 124, no. 44 (2020):24500-24512,
https://doi.org/10.1021/acs.jpcc.0c08152 . .

TY  - JOUR
AU  - Milosavljević, Aleksandar R.
AU  - Božanić, Dušan K.
AU  - Sadhu, Subha
AU  - Vukmirović, Nenad
AU  - Dojčilović, Radovan
AU  - Sapkota, Pitambar
AU  - Huang, Weixin
AU  - Bozek, John D.
AU  - Nicolas, Christophe
AU  - Nahon, Laurent
AU  - Ptasinska, Sylwia
PY  - 2018
UR  - http://pubs.acs.org/doi/10.1021/acs.jpclett.8b01466
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7915
AB  - We report an investigation of lead halide perovskite CH3NH3PbBr3 nanocrystals and associated ligand molecules by combining several different state-of-the-art experimental techniques, including synchrotron radiation-based XPS and VUV PES of free-standing nanocrystals isolated in vacuum. By using this novel approach for perovskite materials, we could directly obtain complete band alignment to vacuum of both CH3NH3PbBr3 nanocrystals and the ligands widely used in their preparation. We discuss the possible influence of the ligand molecules to apparent perovskite properties, and we compare the electronic properties of nanocrystals to those of bulk material. The experimental results were supported by DFT calculations.
T2  - Journal of Physical Chemistry Letters
T1  - Electronic Properties of Free-Standing Surfactant-Capped Lead Halide Perovskite Nanocrystals Isolated in Vacuo
VL  - 9
IS  - 13
SP  - 3604
EP  - 3611
DO  - 10.1021/acs.jpclett.8b01466
ER  - 

@article{
author = "Milosavljević, Aleksandar R. and Božanić, Dušan K. and Sadhu, Subha and Vukmirović, Nenad and Dojčilović, Radovan and Sapkota, Pitambar and Huang, Weixin and Bozek, John D. and Nicolas, Christophe and Nahon, Laurent and Ptasinska, Sylwia",
year = "2018",
abstract = "We report an investigation of lead halide perovskite CH3NH3PbBr3 nanocrystals and associated ligand molecules by combining several different state-of-the-art experimental techniques, including synchrotron radiation-based XPS and VUV PES of free-standing nanocrystals isolated in vacuum. By using this novel approach for perovskite materials, we could directly obtain complete band alignment to vacuum of both CH3NH3PbBr3 nanocrystals and the ligands widely used in their preparation. We discuss the possible influence of the ligand molecules to apparent perovskite properties, and we compare the electronic properties of nanocrystals to those of bulk material. The experimental results were supported by DFT calculations.",
journal = "Journal of Physical Chemistry Letters",
title = "Electronic Properties of Free-Standing Surfactant-Capped Lead Halide Perovskite Nanocrystals Isolated in Vacuo",
volume = "9",
number = "13",
pages = "3604-3611",
doi = "10.1021/acs.jpclett.8b01466"
}

Milosavljević, A. R., Božanić, D. K., Sadhu, S., Vukmirović, N., Dojčilović, R., Sapkota, P., Huang, W., Bozek, J. D., Nicolas, C., Nahon, L.,& Ptasinska, S.. (2018). Electronic Properties of Free-Standing Surfactant-Capped Lead Halide Perovskite Nanocrystals Isolated in Vacuo. in Journal of Physical Chemistry Letters, 9(13), 3604-3611.
https://doi.org/10.1021/acs.jpclett.8b01466

Milosavljević AR, Božanić DK, Sadhu S, Vukmirović N, Dojčilović R, Sapkota P, Huang W, Bozek JD, Nicolas C, Nahon L, Ptasinska S. Electronic Properties of Free-Standing Surfactant-Capped Lead Halide Perovskite Nanocrystals Isolated in Vacuo. in Journal of Physical Chemistry Letters. 2018;9(13):3604-3611.
doi:10.1021/acs.jpclett.8b01466 .

Milosavljević, Aleksandar R., Božanić, Dušan K., Sadhu, Subha, Vukmirović, Nenad, Dojčilović, Radovan, Sapkota, Pitambar, Huang, Weixin, Bozek, John D., Nicolas, Christophe, Nahon, Laurent, Ptasinska, Sylwia, "Electronic Properties of Free-Standing Surfactant-Capped Lead Halide Perovskite Nanocrystals Isolated in Vacuo" in Journal of Physical Chemistry Letters, 9, no. 13 (2018):3604-3611,
https://doi.org/10.1021/acs.jpclett.8b01466 . .

TY  - JOUR
AU  - Hadidi, Rim
AU  - Božanić, Dušan K.
AU  - Garcia, Gustavo A.
AU  - Nahon, Laurent
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7998
AB  - Photoelectron circular dichroism (PECD) is an intense orbital-specific chiroptical effect observed as asymmetries in the angular distribution of photoelectrons produced by photoionization of randomly oriented pure enantiomers with circularly polarized light. After a broad introduction placing this effect in the context of new physical chiral-sensitive methods, we review the main characteristics of PECD in terms of molecular photoionization dynamics. We stress also the analytical capabilities of PECD to retrieve enantiomeric excesses (e.es.) and to probe subtle details of the whole molecular potential, some of them exemplified by the showcase camphor and fenchone molecules. We then present the case of the amino acid alanine for which an interplay between PECD and conformer population is rationalized. Based on this study, we propose a photophysical astrophysical scenario for the origin of life's homochirality, relying upon the asymmetry of the associated recoiling alanine parent ion that could lead at the relevant Lyman- energy to an e.e. of up to 4% in a given line of sight, which appears independent of the temperature. In an attempt to generalize this scenario to other amino acids, new data on proline showing an e.e. of 12%, of the same sign as alanine, are also presented.Abbreviations ARPES: Angle-resolved photoemission; CMS-Xa: Continuum multiple scattering with Xa local-exchange potential; CPL: Circularly polarized light; CD: Circular dichroism; CSM: Circumstellar medium; DPI: Dissociative ionization; HHG: High harmonics generation; HOMO: Highest occupied molecular orbital; ISM: Interstellar medium; KE: Kinetic energy; MS: Mass spectrometry; MW: Microwave; PAD: Photoelectron angular distribution; PECD: Photoelectron circular dichroism; PECD-PICO: Photoelectron circular dichroism / photoion coincidence; PEPICO: Photoelectron / photoion coincidence; PES: Photoelectron spectrum; PV: Parity Violation; REMPI: Resonance-enhanced multi-photon ionization; RH: Resistive heating; TD: Thermodesorption; UV: Ultra-violet; VMI: Velocity map imaging; VUV: Vacuum ultra-violet.
T2  - Advances in Physics: X
T1  - Electron asymmetries in the photoionization of chiral molecules: possible astrophysical implications
VL  - 3
IS  - 1
SP  - 1477530
DO  - 10.1080/23746149.2018.1477530
ER  - 

@article{
author = "Hadidi, Rim and Božanić, Dušan K. and Garcia, Gustavo A. and Nahon, Laurent",
year = "2018",
abstract = "Photoelectron circular dichroism (PECD) is an intense orbital-specific chiroptical effect observed as asymmetries in the angular distribution of photoelectrons produced by photoionization of randomly oriented pure enantiomers with circularly polarized light. After a broad introduction placing this effect in the context of new physical chiral-sensitive methods, we review the main characteristics of PECD in terms of molecular photoionization dynamics. We stress also the analytical capabilities of PECD to retrieve enantiomeric excesses (e.es.) and to probe subtle details of the whole molecular potential, some of them exemplified by the showcase camphor and fenchone molecules. We then present the case of the amino acid alanine for which an interplay between PECD and conformer population is rationalized. Based on this study, we propose a photophysical astrophysical scenario for the origin of life's homochirality, relying upon the asymmetry of the associated recoiling alanine parent ion that could lead at the relevant Lyman- energy to an e.e. of up to 4% in a given line of sight, which appears independent of the temperature. In an attempt to generalize this scenario to other amino acids, new data on proline showing an e.e. of 12%, of the same sign as alanine, are also presented.Abbreviations ARPES: Angle-resolved photoemission; CMS-Xa: Continuum multiple scattering with Xa local-exchange potential; CPL: Circularly polarized light; CD: Circular dichroism; CSM: Circumstellar medium; DPI: Dissociative ionization; HHG: High harmonics generation; HOMO: Highest occupied molecular orbital; ISM: Interstellar medium; KE: Kinetic energy; MS: Mass spectrometry; MW: Microwave; PAD: Photoelectron angular distribution; PECD: Photoelectron circular dichroism; PECD-PICO: Photoelectron circular dichroism / photoion coincidence; PEPICO: Photoelectron / photoion coincidence; PES: Photoelectron spectrum; PV: Parity Violation; REMPI: Resonance-enhanced multi-photon ionization; RH: Resistive heating; TD: Thermodesorption; UV: Ultra-violet; VMI: Velocity map imaging; VUV: Vacuum ultra-violet.",
journal = "Advances in Physics: X",
title = "Electron asymmetries in the photoionization of chiral molecules: possible astrophysical implications",
volume = "3",
number = "1",
pages = "1477530",
doi = "10.1080/23746149.2018.1477530"
}

Hadidi, R., Božanić, D. K., Garcia, G. A.,& Nahon, L.. (2018). Electron asymmetries in the photoionization of chiral molecules: possible astrophysical implications. in Advances in Physics: X, 3(1), 1477530.
https://doi.org/10.1080/23746149.2018.1477530

Hadidi R, Božanić DK, Garcia GA, Nahon L. Electron asymmetries in the photoionization of chiral molecules: possible astrophysical implications. in Advances in Physics: X. 2018;3(1):1477530.
doi:10.1080/23746149.2018.1477530 .

Hadidi, Rim, Božanić, Dušan K., Garcia, Gustavo A., Nahon, Laurent, "Electron asymmetries in the photoionization of chiral molecules: possible astrophysical implications" in Advances in Physics: X, 3, no. 1 (2018):1477530,
https://doi.org/10.1080/23746149.2018.1477530 . .

TY  - JOUR
AU  - Tigrine, Sarah
AU  - Carrasco, Nathalie
AU  - Božanić, Dušan K.
AU  - Garcia, Gustavo A.
AU  - Nahon, Laurent
PY  - 2018
UR  - http://stacks.iop.org/0004-637X/867/i=2/a=164?key=crossref.c825be4da3a1774b12c5ea80b3bc8340
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8066
AB  - Thanks to the Cassini-Huygens mission, it is now established that the first aerosols in Titan's upper atmosphere are found from an altitude of similar to 1200 km. Once they are formed and through their descent toward the surface, these nanoparticles are submitted to persistent far-ultraviolet (FUV) radiation that can reach lower atmospheric layers. Such an interaction has an impact, especially on the chemistry and charge budget of the atmospheric compounds. Models are useful to understand this photoprocessing, but they lack important input data such as the photoemission threshold or the absolute photoabsorption/emission cross sections of the aerosols. In order to quantify the photoemission processes, analogs of Titan's aerosols have been studied with the DESIRS FUV beamline at the synchrotron SOLEIL as isolated substrate-free nanoparticles. We present here the corresponding angle-resolved photoelectron spectroscopy data recorded at different FUV photon energies. The results show a very low photoionization threshold (6.0 +/- 0.1 eV similar to 207 nm) and very high absolute ionization cross sections (similar to 10(6) Mb), indicating that FUV photoemission from aerosols is an intense source of slow electrons that has to be taken into account in photochemical models of Titan's atmosphere.
T2  - The Astrophysical Journal
T1  - FUV Photoionization of Titan Atmospheric Aerosols
VL  - 867
IS  - 2
SP  - 164
DO  - 10.3847/1538-4357/aae4d8
ER  - 

@article{
author = "Tigrine, Sarah and Carrasco, Nathalie and Božanić, Dušan K. and Garcia, Gustavo A. and Nahon, Laurent",
year = "2018",
abstract = "Thanks to the Cassini-Huygens mission, it is now established that the first aerosols in Titan's upper atmosphere are found from an altitude of similar to 1200 km. Once they are formed and through their descent toward the surface, these nanoparticles are submitted to persistent far-ultraviolet (FUV) radiation that can reach lower atmospheric layers. Such an interaction has an impact, especially on the chemistry and charge budget of the atmospheric compounds. Models are useful to understand this photoprocessing, but they lack important input data such as the photoemission threshold or the absolute photoabsorption/emission cross sections of the aerosols. In order to quantify the photoemission processes, analogs of Titan's aerosols have been studied with the DESIRS FUV beamline at the synchrotron SOLEIL as isolated substrate-free nanoparticles. We present here the corresponding angle-resolved photoelectron spectroscopy data recorded at different FUV photon energies. The results show a very low photoionization threshold (6.0 +/- 0.1 eV similar to 207 nm) and very high absolute ionization cross sections (similar to 10(6) Mb), indicating that FUV photoemission from aerosols is an intense source of slow electrons that has to be taken into account in photochemical models of Titan's atmosphere.",
journal = "The Astrophysical Journal",
title = "FUV Photoionization of Titan Atmospheric Aerosols",
volume = "867",
number = "2",
pages = "164",
doi = "10.3847/1538-4357/aae4d8"
}

Tigrine, S., Carrasco, N., Božanić, D. K., Garcia, G. A.,& Nahon, L.. (2018). FUV Photoionization of Titan Atmospheric Aerosols. in The Astrophysical Journal, 867(2), 164.
https://doi.org/10.3847/1538-4357/aae4d8

Tigrine S, Carrasco N, Božanić DK, Garcia GA, Nahon L. FUV Photoionization of Titan Atmospheric Aerosols. in The Astrophysical Journal. 2018;867(2):164.
doi:10.3847/1538-4357/aae4d8 .

Tigrine, Sarah, Carrasco, Nathalie, Božanić, Dušan K., Garcia, Gustavo A., Nahon, Laurent, "FUV Photoionization of Titan Atmospheric Aerosols" in The Astrophysical Journal, 867, no. 2 (2018):164,
https://doi.org/10.3847/1538-4357/aae4d8 . .