Laser phthalocyanine film

Here, we briefly describe the laser ablation dynamics of phthalocyanine film where the primary species was confirmed, by femtosecond transient absorption spectroscopy [25], to be its electronically excited state. The exdton absorption band was replaced in 20 ps by a hot band of the ground electronic state. This rapid decay was ascribed to mutual interactions between densely formed excitons leading to sudden temperature elevation. The elevated temperature was estimated by comparing transient absorption spectra with the temperature difference ones. It is worth noting that quite normal dynamics of the excited states are detected, even under ablation conditions, which is the reason why we do not accept the plasma mechanism. Then we considered how to correlate these electronic processes of phthalocyanine films with their fragmentation. 

Bravo-Diaz C —> Gonzalez-Romero E Briscoe WH, Horn RG Electrical double layer interactions in a non-polar liquid measured with a modified surface force apparatus 147 Brunner M, Bechinger C Colloidal systems in intense, two-dimensional laser fields 156 Buckin V Lehmann L Burrows HD, Kharlamov AA About energy and electron transfer processes in Cgo/phthalocyanine films 52 Burrows HD Kharlamov AA Burrows HD Hungerford G... 

Hosokawa, Y., Yashiro, M., Asahi, T., Fukumura, H. and Masuhara, H. (2000) Femtosecond laser ablation dynamics of amorphous film of a substituted Cu-phthalocyanine. Appl. Surf. Sci., 154-155, 192-195. 

IR absorbers and reflectors are used to limit the heat development in rooms (e.g., in greenhouses) and are incorporated in agricultural films or in glazing. Typical materials range from kaolin (aluminum silicate) or other silicates and hydrotalcites [68] in agricultural films to dyes (e.g., phthalocyanines or anthraquinones). Furthermore, dyes with near-IR absorption are added to enhance laser welding of polymers. 

It should be pointed out that a specific modification of Ti(0)Pc 1 (R = -H) in organic polymers is the most widely used photoconductor in bilayer photoreceptor copiers and laser printers [19]. A thin film containing ethylene-bridged silicon phthalocyanine polymer dispersed in poly(vinylidene fluoride) (1 4 by weight) obtained by casting from a DMF slurry on quartz was orientated in an electrical field [20], A double-layered receptor device for measuring the... 

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