By a News Reporter-Staff News Editor at Science Letter -- Data detailed on Microscopy have been presented. According to news reporting from Bucharest, Romania, by NewsRx journalists, research stated, "The surface morphology of azo-polyimide films was investigated after 355nm Nd: YAG laser irradiation with two different incident fluencies. Atomic force microscopy (AFM) was employed to correlate the laser-induced tridimensional nanogrooved surface relief with the incident fluence and the number of irradiation pulses."
The news correspondents obtained a quote from the research from National Institute for Laser, Plasma and Radiation Physics, "The height images revealed that the grooves depth increased even tens of times by increasing the incident fluence, using the same numbers of irradiation pulses. For low incident fluence, the films were uniformly patterned till 100 pulses of irradiation. Instead, when using higher fluence, after 15 pulses of irradiation the accuracy of the surface relief definition was reduced. This behavior could be explained by means of two different mechanisms, one that suppose the film photo-fluidization due to the cis-trans isomerization processes of the azo-groups and the second one responsible for the directional mass displacement. The dominant surface direction and parameters like isotropy, periodicity, and period were evaluated from the polar representation for texture analysis, revealing the appearance of ordered and directionated nanostructures for most of the experimental conditions. Also, the graphical studies of the functional volume parameters have evidenced the improvement of the relief structuration during surface nanostructuration."
According to the news reporters, the research concluded: "The correlation of these statistical texture parameters with the irradiation characteristics is important in controlling the alignment of either the liquid crystals or the cells/tissues on patterned azo-polyimide surfaces for optoelectronic devices and implantable biomaterials, respectively. Microsc. Res. Tech. 76:914-923, 2013."
For more information on this research see: An atomic force microscopy statistical analysis of laser-induced azo-polyimide periodic tridimensional nanogrooves. Microscopy Research and Technique, 2013;76(9):914-923. Microscopy Research and Technique can be contacted at: Wiley-Blackwell, 111 River St, Hoboken 07030-5774, NJ, USA. (Wiley-Blackwell - www.wiley.com/; Microscopy Research and Technique - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1097-0029)
Our news journalists report that additional information may be obtained by contacting I. Stoica, Natl Inst Laser Plasma & Radiat Phys, Bucharest 077125, Romania. Additional authors for this research include L. Epure, I. Sava, V. Damian and N. Hurduc (see also Microscopy).
Keywords for this news article include: Europe, Romania, Bucharest, Microscopy
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