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Dirt reference standard for surface cleanliness measurements

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Thin films based on polymer poly(isobutyl methacrylate) (PIBMA), doped with carbon black particles deposited on steel plate substrates are proposed as dirt reference standards for cleanliness accreditation methods, particularly for instruments based on laser ablation. The films were made with the spin-coating method, obtaining layers with thickness between 4 and 17 lm. Carbon black particles with sizes smaller than 100 nm and concentrations between 1 and 27.6 mgr/cm3 were used. Characterization of the films was made by using absorbance measurements and laser ablation-induced photoacoustic.

Palabras clave
dirt standards
cleanliness
laser ablation
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