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Study Data from Shandong University Update Knowledge of Nanotechnology

February 7, 2014

By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Nanotechnology. According to news originating from Shandong, People's Republic of China, by NewsRx correspondents, research stated, "Multiple nanoscale parallel grooves were induced on Si3N4/TiC ceramic by a femtosecond pulsed laser with a pulse width of 120 fs, wavelength of 800 nm and repetition rate of 1000 Hz. Pulse energy, scanning speed and the number of overscans were studied for the formation of regular parallel grooves."

Our news journalists obtained a quote from the research from Shandong University, "The evolution of surface morphology, ablation dimension and surface roughness with different processing parameters was measured by scanning electron microscope (SEM), atomic force microscope (AFM) and white light interferometer. The results show that the uniform multiple nanoscale parallel grooves are obtained by optimizing the pulse energy, scanning speed and number of overscans. The optimum parameters are 2.5 mu J pulse energy and 130 mu m/s scanning speed with 1 overscan. At a constant scanning speed of 130 mu m/s, the period of the parallel grooves stays relatively constant with increasing pulse energy, fluctuating around 600 nm, which is smaller than the laser wavelength. Additionally, the period was found to increase in a roughly linear fashion with increasing scanning speed. The depth of grooves increases with the increasing pulse energy and decreasing scanning speed; the surface roughness increases with the increasing pulse energy, decreasing scanning speed and increasing number of overscans."

According to the news editors, the research concluded: "Meanwhile, the formation mechanism of laser-induced multiple nanoscale parallel grooves on the Si3N4/TiC ceramic surface was discussed."

For more information on this research see: Multiple nanoscale parallel grooves formed on Si3N4/TiC ceramic by femtosecond pulsed laser. Applied Surface Science, 2014;289():62-71. Applied Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier -; Applied Surface Science -

The news correspondents report that additional information may be obtained from Y.Q. Xing, Shandong University, Dept. of Mech Engn, MOE, Key Lab High Efficiency & Clean Mech Manufacture, Jinan 250061, Shandong, People's Republic of China. Additional authors for this research include J.X. Deng, Y.S. Lian, K.D. Zhang, G.D. Zhang and J. Zhao (see also Nanotechnology).

Keywords for this news article include: Asia, Shandong, Nanoscale, Nanotechnology, Emerging Technologies, People's Republic of China

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Source: Science Letter

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