Dual-Pulsed Laser Ablation of Oyster Shell Producing Novel Thin Layers Deposed to Saccharomyces cerevisiae
Author:
Cocean Georgiana12, Cocean Alexandru13, Garofalide Silvia13, Pelin Vasile13ORCID, Munteanu Bogdanel Silvestru1, Pricop Daniela Angelica14ORCID, Motrescu Iuliana5ORCID, Dimitriu Dan Gheorghe1ORCID, Cocean Iuliana1ORCID, Gurlui Silviu1ORCID
Affiliation:
1. Atmosphere Optics, Spectroscopy and Laser Laboratory (LOASL), Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Bld., 700506 Iasi, Romania 2. Rehabilitation Hospital Borsa, 1 Floare de Colt Street, 435200 Borsa, Romania 3. Laboratory of Applied Meteorology and Climatology, Research Center with Integrated Techniques for Atmospheric Aerosol Investigation in Romania (RECENT AIR), Alexandru Ioan Cuza University of Iasi, A Building, Physics, 11 Carol I, 700506 Iasi, Romania 4. Laboratory of Astronomy and Astrophysics, Research Center with Integrated Techniques for Atmospheric Aerosol Investigation in Romania (RECENT AIR), Alexandru Ioan Cuza University of Iasi, Astronomical Observatory, 11 Carol I, 700506 Iasi, Romania 5. Sciences Department & Research Institute for Agriculture and Environment, Iasi University of Life Sciences, 3 Sadoveanu Alley, 700490 Iasi, Romania
Abstract
Dual-pulsed (DPL) laser deposition using oyster shells as targets was studied in order to find out if this method can replace the use of high-power pulsed lasers. Aspects related to changes in the morphological structure of the thin layer but also to the chemical composition of the obtained thin layer were analyzed and compared with the target as well as with the thin layers obtained with a higher power pulsed laser in a single-pulsed (SPL) regime. Orthorhombic structures were noticed with Scanning Electron Microscopy for the thin film obtained in DPL mode compared to the irregular particles obtained in SPL mode. The deacetylation process during ablation was evidenced by Fourier Transform Infrared spectroscopy, resulting in chitosan-based thin films. The effect of the obtained thin films of chitosan on the cells of baker’s yeast (Saccharomyces cerevisiae) was studied. Restoration of the yeast paste into initial yeast was noticed mainly when the hemp fabric was used as support for the coating with yeas which was after that coated with chitosan thin film produced by DPL method.
Funder
Ministry of Research, Innovation and Digitization, CNCS–UEFISCDI Ministry of Research, Innovation and Digitization Executive Agency for Higher Education, Research, Development and Innovation, UEFISCDI, ROBIM Research Center with Integrated Techniques for Atmospheric Aerosol Investigation in Romania European Social Fund
Subject
Polymers and Plastics,General Chemistry
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