Influence of wavelength on the laser removal of lichens colonizing heritage stone

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• 作者：M. Sanz^a ; ^{mikel.sanz@iqfr.csic.es} ; M. Oujja^a ; C. Ascaso^b ; S. Pé ; rez-Ortega^c ; V. Souza-Egipsy^d ; R. Fort^e ; A. de los Rios^b ; J. Wierzchos^b ; M.V. Ca&ntilde ; amares^d ; M. Castillejo^a
• 关键词：Laser removal ; Lichens ; Biodeteriogen layer ; Stone ; Conservation
• 刊名：Applied Surface Science
• 出版年：2017
• 出版时间：31 March 2017
• 年：2017
• 卷：399
• 期：Complete
• 页码：758-768
• 全文大小：3954 K
• 卷排序：399

文摘

Optimal laser removal conditions depend on light absorption of lichen species. Highly UV absorbing species (C. vitellina) removed by 266 nm nanosecond pulses. Dual 1064-266/355 nm irradiation strongly damages a large variety of lichen species. Calcium inside the lichen thallus prevents the damaging effect of laser irradiation.