By a News Reporter-Staff News Editor at Science Letter -- Investigators discuss new findings in Nanoparticles. According to news reporting originating in Kyoto, Japan, by NewsRx journalists, research stated, "Recently, some papers reported successful imaging of subsurface features using atomic force microscopy (AFM). Some theoretical studies have also been presented, however the imaging mechanisms are not fully understood yet."
The news reporters obtained a quote from the research from Kyoto University, "In the preceeding papers, imaging of deeply buried nanometer-scale features has been successful only if they were buried in a soft matrix. In this paper, subsurface features (Au nanoparticles) buried in a soft polymer matrix were visualized. To elucidate the imaging mechanisms, various AFM techniques; heterodyne force microscopy, ultrasonic atomic force microscopy (UAFM), 2nd-harmonic UAFM and force modulation microscopy (FMM) were employed. The particles buried under 960 nm from the surface were successfully visualized which has never been achieved. The results elucidated that it is important for subsurface imaging to choose a cantilever with a suitable stiffness range for a matrix. In case of using the most suitable cantilever, the nanoparticles were visualized using every technique shown above except for FMM. The experimental results suggest that the subsurface features buried in a soft matrix with a depth of at least 1 mu m can affect the local viscoelasticity (mainly viscosity) detected as the variation of the amplitude and phase of the tip oscillation on the surface."
According to the news reporters, the research concluded: "This phenomenon presumably makes it possible to visualize such deeply buried nanometer-scale features in a soft matrix."
For more information on this research see: Imaging of Au nanoparticles deeply buried in polymer matrix by various atomic force microscopy techniques. Ultramicroscopy, 2013;133():41-49. Ultramicroscopy can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands (see also Nanoparticles).
Our news correspondents report that additional information may be obtained by contacting K. Kimura, Kyoto University, Off Soc Academy Collaborat Innovat, Nishikyo Ku, Kyoto 6158520, Japan. Additional authors for this research include K. Kobayashi, K. Matsushige and H. Yamada.
Keywords for this news article include: Asia, Kyoto, Japan, Nanotechnology, Emerging Technologies
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