| Title |
ZnO tetrapod morphology influence on UV sensing properties / |
| Authors |
Ilickas, Mindaugas ; Mardosaite, Rasa ; Cesano, Federico ; Cravanzola, Sara ; Barolo, Claudia ; Scarano, Domenica ; Viscardi, Guido ; Rackauskas, Simas |
| DOI |
10.1088/1361-6528/acfcbf |
| Full Text |
|
| Is Part of |
Nanotechnology.. Bristol : IOP publishing. 2024, vol. 35, iss. 1, art. no. 015502, p. 1-12.. ISSN 0957-4484. eISSN 1361-6528 |
| Keywords [eng] |
chemoresistive ; debye length ; FTIR spectroscopy ; porosity measurements ; UV sensing ; ZnO tetrapods |
| Abstract [eng] |
The aim of this work was to investigate how ZnO tetrapod (ZnO-T) morphology, structure, and their surface charge properties (i.e., Debye length) influence their UV sensing properties, shedding light on the underlying photoresponse mechanisms. ZnO-Ts were synthesized and centrifuged to obtain three different fractions with tuned morphology, which were characterized by SEM, TEM, and HRTEM microscopies, XRD analysis, BET measurements, FTIR and UV-Vis spectroscopies. ZnO-T UV sensors were fabricated and tested comparing among ZnO-T fractions and commercial ZnO nanoparticles. ZnO-T photoresponse was mostly influenced of by ZnO-T leg diameter, with the optimal value close to the double Debye length. We also demonstrated how fractionating ZnO-Ts for morphology optimization can increased the responsivity by 2 orders of magnitude. Moreover, ZnO-T showed 3 orders of magnitude higher responsivity compared to commercial ZnO nanopowder. These results are beneficial for the engineering of efficient UV sensors and contribute to a deeper understanding the overall mechanism governing UV photoresponse. |
| Published |
Bristol : IOP publishing |
| Type |
Journal article |
| Language |
English |
| Publication date |
2024 |
| CC license |
|
