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Dispositivo/montaje optoelectrónico y proceso para análisis estratigráfico de la composición química de la capa superficial de obras de arte mediante técnicas LIBS (espectroscopía de plasma inducido por láser)

Resumen

Tipo:
Oferta Tecnológica
Referencia:
TORO20150518001
Publicado:
04/11/2015
Caducidad:
03/11/2016
Resumen:
Un equipo de investigación rumano ha desarrollado un método y un dispositivo de análisis estratigráfico de la composición química de la capa superficial de obras de arte mediante técnicas LIBS (espectroscopía de plasma inducido por láser). El método y dispositivo compacto y portátil son aptos para análisis cualitativos y cuantitativos de múltiples elementos en una amplia variedad de superficies. Lo resultados se obtienen en muy poco tiempo. Se buscan universidades, institutos de investigación o pymes del mismo sector con el fin de cooperar en la preparación del dispositivo para el mercado o en establecer acuerdos de joint venture.

Details

Tittle:
Optoelectronic device/mounting and process for the stratigraphical analysis of chemical composition of art object surface layer material using LIBS (Laser induced Breakdown Spectroscopy) techniques
Summary:
A research team from Romania has created a method and a device for stratigraphic analysis of the superficial material layers of artworks, using LIBS (Laser induced Breakdown Spectroscopy) techniques. The seeked partners are universities, research institutes or SMEs from the same activity field in order to cooperate in preparing the device for market or for a joint venture.
Description:
A Romanian research team has developed a method and a device for stratigraphic analysis of the superficial material layers of artworks. The laser interaction with various materials always involves an energy exchange. The interaction of a pulsed laser beam with the surface may lead to a partial evaporation, originating a process known as laser induced ablation, one of the main mechanisms involved in laser cleaning of artworks.
For high irradiances (e.g. > 1MW/cm2, depending on the target composition) the evaporation occurs with a plasma formation, involving several successive processes such as: surface melting with hydrodynamic flow, vaporization, vapor ionization, surrounding and evaporating gas breakdown, free electron acceleration within the evaporated cloud, plasma heating. The plasma growth and decay implies: expansion, shock waves formation and propagation, deceleration of free electrons with inverse Bremsstrahlung emission, collisions in the gas cloud with excitation and relaxation of atoms/ions, chemical recombination, radiative recombination. Occasionally conditions associated to a Local Thermal Equilibrium (LTE) can occur, whenever electrons, atoms and ions in the plasma are associated to the same temperature. The (LTE) is a dynamic status reached for plasma parameters slowly varying in a suitable temporal range, during the plasma relaxation. Initially, the plasma temperature is very high (typically T > 30000K), while auto-ionization accompanied by a continuum emission spectrum is dominant. Upon (LTE) conditions, characteristic line emission spectra are detected mostly from the atomic and first ionic excited species produced. Further plasma cooling and recombination cause plasma departure from (LTE). In its final stages the process is characterized by cluster and nanoparticles ejection in the dark slow expanding tail of the plume.
During the laser ablation at high energy densities, accompanied by the plasma formation which gives rise to line emissions recorded in LIBS, the bright plume is observed in combination with the formation of a crater at the surface. One of the main objectives of the research work has related to LIBS crater assessment and determination of the ablation rate for different Cultural Heritage materials, mainly metal, as well as the monitoring of its evolution in relation to the laser beam fluency.
The Romanian research team is looking for universities, research institutes or SMEs from the same activity field in order to cooperate in preparing the device for market or for a joint venture.
Advantages and Innovations:
- micron level damages of the investigated surface, allowing the conservation stage preservation of the investigated artworks;
- method and device suitable for qualitative and quantitative multi-elemental analyses on a large variety of samples surfaces;
- high speed in delivering results;
- compact and transportable device.
Stage of Development:
Available for demonstration
IPs:
Granted patent or patent application essential
CommeR Statunts Regarding IPR Status:
Patent applied for at the State Office for Inventions and Trademarks. IP rights on national level - Romania.

Partner sought

Type and Role of Partner Sought:
The targeted partners are universities, research institutes or SMEs from the same activity field in order to cooperate in preparing the device for market or for a joint venture.

Client

Type and Size of Client:
R&D Institution
Already Engaged in Trans-National Cooperation:
No
Languages Spoken:
English
Romanian

Keywords

Technology Keywords:
09001003 Ensayos de material químico
05001001 Química analítica