This study compared Sb2Se3 material in the form of commercial polycrystalline bulk, sputtered thin film, and homemade polycrystalline material using laser desorption ionization (LDI) time of flight mass spectrometry with quadrupole ion trap mass spectrometry. It also analyzed the stoichiometry of the SbmSen clusters formed. The results showed that homemade Sb2Se3 bulk was more stable compared to thin film; its mass spectra showed the expected cluster formation. The use of materials for surface-assisted LDI (SALDI), i.e., graphene, graphene oxide, and C60, significantly increased the mass spectra intensity. In total, 19 SbmSen clusters were observed. Six novel, high-mass clusters-Sb4Se4+, Sb5Se3-6+, and Sb7Se4+-were observed for the first time when using paraffin as a protective agent.

Department of Chemistry Faculty of Science Masaryk University Kamenice 5 A14 62500 Brno Czech Republic

Department of Graphic Arts and Photophysics Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic

Institut des Sciences Chimiques de Rennes UMR CNRS 6226 Equipe Verres et Céramiques Université de Rennes 1 35042 Rennes France

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