157 nm fluorine laser ablation of wooden surfaces as an improved preparation technique for microscopy
✍ Scribed by M. Kopp; E. Roddewig; H. G?nther; G. Ohms; M. Leck; W. Viöl
- Book ID
- 102443882
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 315 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1612-2011
No coin nor oath required. For personal study only.
✦ Synopsis
By means of 157 nm VUV short-wavelength
laser-irradiation the wood layer of damaged cells near the surface
as well as deeper wood regions can be removed. As this is a
non-thermal laser ablation-process, oxidation of the wood surface
exposed to 157 nm under N~2~-atmosphere is avoided even with high
power densities. By applying a mechanical pre-treatment process
the wood structure is compressed and can then be removed with
almost no damage. Four types of wood - spruce, pine, beech and
oak - were ablated in all three main cutting directions prescribed
for an anisotropic material such as wood. Several microscopic
techniques were used. To measure the ablation depth LSM was
applied. The surface roughness as well as the quality of the laser
ablation was determined by using LV-SEM. CAM was used to measure
the contact angle and thereby calculate the surface energy.
Ablation can be carried out regardless of the cutting direction
used to obtain clean and open surfaces free of artefacts.