Enhancement of Electronic and Optical Properties of ZnO/Al2O3 Nanolaminate Coated Electrospun Nanofibers

Roman Viter (1, 2) , Igor Iatsunskyi (3) , Viktoriia Fedorenko (4, 5) , Saulius Tumenas (2) , Zigmas Balevicius (2, 6) , Arunas Ramanavicius (2) , Sebastien Balme (4) , Mateusz Kempiński (3) , Grzegorz Nowaczyk (3) , Stefan Jurga (3) , Mikhael Bechelany (4)

1 LU - University of Latvia
2 FTMC - Center for Physical Sciences and Technology [Vilnius]
3 UAM - Uniwersytet im. Adama Mickiewicza w Poznaniu = Adam Mickiewicz University in Poznań
4 IEM - Institut Européen des membranes
5 Odessa National I.I.Mechnikov University
6 Vilnius Gediminas Technical University

Nanolaminates are new class of promising nanomaterials with outstanding properties. Here we explored on the tuning of structural properties and the enhancement of electronic and optical properties of 1D PAN ZnO/Al2O3 nanolaminates designed by atomic layer deposition (ALD) and electrospinning. The influence of ZnO/Al2O3 bilayer thicknesses on the fundamental properties of 1D PAN ZnO/Al2O3 nanolaminates has been investigated. Due to the quantum confinement effect, the shift of XPS peaks to higher energies has been observed. Work function of Al2O3 was mostly independent of the bilayers number, whereas the ZnO work function decreased with an increase of the bilayer number. Photoluminescence of the 1D PAN ZnO/Al2O3 nanolaminates corresponded to emission bands in ZnO nanolayers. Due to quantum confinement and surface band bending, no excitonic peaks were observed. The defect emission band was affected by the band bending and defect concentration. The enhanced photoluminescence of the 1D PAN ZnO/Al2O3 nanolaminates allows applications in optical (bio)sensing field

Mots clés: Nanolaminates; atomic layer deposition; electrospinning; Work function; photoluminescence

Domaines: Matériaux

Roman Viter, Igor Iatsunskyi, Viktoriia Fedorenko, Saulius Tumenas, Zigmas Balevicius, et al.. Enhancement of Electronic and Optical Properties of ZnO/Al2O3 Nanolaminate Coated Electrospun Nanofibers. Journal of Physical Chemistry C, 2016, 120 (9), pp.5124 - 5132. ⟨10.1021/acs.jpcc.5b12263⟩. ⟨hal-01681264⟩