157 nm fluorine laser ablation of wooden surfaces as an
improved preparation technique for microscopy

Kopp, Markus; Roddewig, E; Günther, H; Ohms, G.; Leck, Michael; Viöl, Wolfgang

doi:10.1002/lapl.200410143

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…The experience so far regarding the application of UV laser irradiation for sample preparation for microscopy studies of wood and wood composites (Seltman, 1995;Wu & Seltman, 1998;Stehr et al, 1998;Sandberg, 1999;Kopp et al, 2005;Mertens et al, 2006;Sandberg & Sö derströ m, 2006;Segerholm et al, 2007;Almkvist, 2008) implies a number of obvious advantages compared with conventional sample preparation techniques: (1) the wood microstructure is efficiently revealed with no mechanically induced microcracks and redistribution of polymers or other mobile substances in the prepared surface;…”

Section: Introductionmentioning

confidence: 98%

Micromorphological studies of modified wood using a surface preparation technique based on ultraviolet laser ablation

Wålinder¹,

Omidvar²,

Seltman³

et al. 2009

Wood Material Science & Engineering

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The objective of this paper is to demonstrate an ultraviolet (UV) laser ablation technique as a tool for sample preparation in microscopy studies of modified wood. Improved techniques for studying the microstructure of modified wood are crucial for a deeper understanding of many of their physical, mechanical and durability properties. The surface preparation technique is described in this paper. An illustration of micrographs of the micromorphology and polymer distribution in some examples of modified wood is also presented. It is clearly demonstrated that in contrast to conventional surface preparation techniques used for light microscopy and scanning electron microscopy, i.e. razor blade and microtome cutting techniques, UV laser ablation does not introduce any mechanically induced microcracks and redistribution of polymers or other mobile substances in the prepared surface. Results also show that, in particular, this technique seems to be suitable for studying polymer distribution in resin-impregnated wood, as well as detection of microcracks in modified wood cell walls.

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Section: Introductionmentioning

confidence: 98%

Micromorphological studies of modified wood using a surface preparation technique based on ultraviolet laser ablation

Wålinder¹,

Omidvar²,

Seltman³

et al. 2009

Wood Material Science & Engineering

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“…The cross cut is one of the three main cutting directions. This direction can be strongest ablated [9], so differences appear clearest. The samples, which were 20×10×10 mm 3 , were prepared by using a standard circular saw.…”

Section: Methodsmentioning

confidence: 94%

UV laser ablation and plasma treatment of wooden surfaces – a comparing investigation

Mertens¹,

Wolkenhauer²,

Leck³

et al. 2006

Laser Phys. Lett.

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Using UV short-wavelength laser irradiation, the layer of mechanically damaged cells on wooden surfaces can be removed. Four excimer lasers (157 nm, 193 nm, 248 nm, 308 nm) were used to compare the ablation of wooden surfaces by different UV wavelengths. The ablation depth was measured by using optical microscopy. LV-SEM was applied to determine the appearance and quality of the laser ablation. In addition to the ablation process the laser can be used also to influence the surface energy. As the same effect can be achieved by plasma treatment of wooden surfaces, both methods were compared. The comparison was made by means of the water droplet test. The plasma treatment was carried out at atmospheric pressure as a dielectric barrier discharge. Two types of wood were determined: beech and thermowood beech. Thermowood is a heat treated lumber product especially made for outdoor applications. It was examined, whether the thermal treatment of wood influences the characteristic changes of the laser ablation and the plasma treatment. With the researched wavelengths, homogeneous ablation is possible. The absorption time can be reduced both with laser ablation and plasma treatment, whereas plasma treatment causes a stronger effect. A combined treatment improves the effect additionally.UV laser ablated surface of a) beech and b) thermowood beech; the thermal treatment did not change the ablation behavior

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Adsorption of silver on cellobiose and cellulose studied with MIES, UPS, XPS and AFM

et al. 2013

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Metastable induced electron spectroscopy, ultraviolet photoelectron spectroscopy and X-ray photoelectron spectroscopy as well as atomic force microscopy were employed to study the adsorption of silver on cellulose as well as its precursor cellobiose. The formation of silver nanoparticles encapsulated by the organic film previously found for the monomer glucose is well reproduced for the dimer cellobiose. For the polymer cellulose on the other hand, no nanoparticle formation is found even though the surface is covered with silver atoms. No significant chemical interaction is found in any of these cases

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157 nm fluorine laser ablation of wooden surfaces as an improved preparation technique for microscopy

Cited by 5 publications

References 13 publications

Micromorphological studies of modified wood using a surface preparation technique based on ultraviolet laser ablation

Micromorphological studies of modified wood using a surface preparation technique based on ultraviolet laser ablation

UV laser ablation and plasma treatment of wooden surfaces – a comparing investigation

Adsorption of silver on cellobiose and cellulose studied with MIES, UPS, XPS and AFM

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