This study presents a comparison of the piezoelectric properties of nanostructured thin films made of arrays of vertically oriented ZnO-nanorods (ZnO-NRs) over ITO-glass substrate and of ZnO-nanowalls (ZnO-NWs) over aluminium substrate. Both nanostructures were synthesized on a large area through Chemical Bath Deposition (CBD). The morphological, structural and chemical characteristics of the produced nanostructures were investigated in order to assess the crystal quality and purity. To this purpose, we used different techniques, such as Field-Emission Scanning Electron Microscopy (FE-SEM), Atomic Force Microscopy (AFM), Energy Dispersive X-ray Analysis (EDX), Powder X-ray Diffraction (P-XRD), X-ray Photoelectron Spectroscopy (XPS) and Photoluminescence Spectroscopy (PL). Moreover, the piezoelectric response of the nanostructured films was assessed through Piezoresponse Force Microscopy (PFM). This technique was employed to obtain a quantitative evaluation of the piezoelectric coefficient (d_33) of the film. We obtained d_33 values as high as (7.01$\times$0.33) pm/V for ZnO-NRs and (2.63 $\times$ 0.49) pm/V for ZnO-NWs films.

Laser-induced fluorescence (LIF) has found, in the recent years, widespread application to the field of material study and characterization. In particular, LIF has been applied to the assessment of damage, biological growth, and the analysis of specific materials on various surfaces in cultural heritages. Only a few papers deal with the application of LIF to the study of modern synthetic materials (mostly plastics) and pigments, and the analysis of contemporary works of art. Preliminary laboratory measurements on a wide range of plastic and cellulose-based materials, solvents, resins, and varnishes have been performed for rapid material characterization during in situ measurement campaigns in cultural heritage, security, and forensic contexts. Four paintings by Gastone Novelli, in the National Gallery of Modern and Contemporary Art, Rome, have been investigated by a compact LIDAR fluorosensor scanning system developed at the Laboratory of Diagnostic and Metrology in the ENEA Centre of Frascati (UTAPRAD-DI...