RT info:eu-repo/semantics/article
T1 Ultra-Short Pulse Laser Cleaning of Contaminated Pleistocene Bone: A Comprehensive Study on the Influence of Pulse Duration and Wavelength
A1 Rahman, Md. Ashiqur
A1 Fuente Leis, Germán F. de la
A1 Carretero Díaz, José Miguel
A1 Alonso Abad, Mª Pilar
A1 Alonso Alcalde, Rodrigo
A1 Chapoulie, Rémy
A1 Schiavon, Nick
A1 Angurel Lámban, Luis Alberto
K1 Femtosecond laser
K1 Sub-nanosecond laser
K1 Cleaning
K1 Pulse duration
K1 Wavelength
K1 Archaeological bone
K1 Sima de los Huesos
K1 Tecnología
K1 Technology
K1 Paleontología
K1 Paleontology
K1 Arqueología-Burgos
K1 Archaeology-Burgos
AB The impact of wavelength and pulse duration in laser cleaning of hard blackish contaminants crust from archaeologically significant Pleistocene bone is investigated in this research. The objective is to determine the practical cleaning procedures and identify adequate laser parameters for cleaning archaeological bone from Sima de los Huesos (Spain) based on conservation and restoration perspectives. Bone surface cleaning was performed utilizing two Q-switched Nd:YAG lasers: subnanosecond pulsed lasers with emission wavelengths at 355 nm and 1064 nm, respectively, and a Yb:KGW femtosecond pulsed laser with an emission wavelength in the third harmonic at 343 nm. In all experiments, the laser beam scanning mode was applied to measure cleaning efficiency in removing contaminants and degradation products while assessing the underlying substrate surface damage. Several properties, including wavelength-dependent absorption, pulse repetition rate, and thermal properties of the material, are analyzed when evaluating the ability of these lasers to boost the cleaning efficiency of the deteriorated bone surface. Bone surface morphology and composition were studied and compared before and after laser irradiation, using Optical Microscopy, Scanning Electron Microscopy with Energy Dispersive X-ray Spectrometry (SEM-EDS), Fourier Transform Infrared Spectroscopy (FTIR), and X-ray Photoelectron Spectroscopy (XPS) characterization methods. The results indicate that 238-femtosecond UV laser irradiation with 2.37 TWcm−2 is significantly safer and more efficient toward surface contaminant desorption than sub-nanosecond laser irradiation. The results herein presented suggest that these types of fs lasers may be considered for realistic laser conservation of valuable historic and archaeological museum artifacts.
PB MDPI
YR 2023
FD 2023-02
LK http://hdl.handle.net/10259/7926
UL http://hdl.handle.net/10259/7926
LA eng
NO This research was funded by the H2020-MSCA-ITN-EJD/ED-ARCHMAT action funding under the Marie Skłodowska-Curie grant agreement, No 766311. The Atapuerca research project is financed by Ministerio de Ciencia, Innovación y Universidades, grant no. PID2021-122355NB-C31/MCIN/AEI/10.13039/501100011033/ FED ER.UE. Fieldwork at the Atapuerca sites is funded by the Junta de Castilla y León and the Fundación Atapuerca. The archaeological materials presented in this work were made available by the Laboratory of Human Evolution of the University of Burgos, in close collaboration with the “Colección Museística de Castilla y León” of the Junta de Castilla y León, and Museo de la Evolución Humana (Burgos); we acknowledge Juan Luis Arsuaga for the permit to analyze the sample. The use of Servicio General de Apoyo a la Investigación and the National Facility ELECMI ICTS, node “Laboratorio de Microscopías Avanzadas” at the University of Zaragoza is acknowledged. Partial support was obtained from Departamento de Ciencia, Universidad y Sociedad del Conocimiento of Gobierno de Aragón “Construyendo Europa desde Aragón” (research group T54_20R). This work is part of the ongoing collaboration between INMA (CSIC-University of Zaragoza) and the University of Burgos, under the auspices of Unidad Asociada de I+D+I al CSIC “Vidrio y Materiales del Patrimonio Cultural (VIMPAC)”.
DS Repositorio Institucional de la Universidad de Burgos
RD 09-may-2024