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Studies from C. Westermeier and Colleagues Reveal New Findings on Nanotechnology (Sub-micron phase coexistence in small-molecule organic thin films...

August 15, 2014



Studies from C. Westermeier and Colleagues Reveal New Findings on Nanotechnology (Sub-micron phase coexistence in small-molecule organic thin films revealed by infrared nano-imaging)

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Nanotechnology have been published. According to news reporting originating in Martinsried, Germany, by NewsRx journalists, research stated, "Controlling the domain size and degree of crystallization in organic films is highly important for electronic applications such as organic photovoltaics, but suitable nanoscale mapping is very difficult. Here we apply infrared-spectroscopic nano-imaging to directly determine the local crystallinity of organic thin films with 20-nm resolution."

The news reporters obtained a quote from the research, "We find that state-of-the-art pentacene films (grown on SiO2 at elevated temperature) are structurally not homogeneous but exhibit two interpenetrating phases at sub-micrometre scale, documented by a shifted vibrational resonance. We observe bulk-phase nucleation of distinct ellipsoidal shape within the dominant pentacene thin-film phase and also further growth during storage. A faint topographical contrast as well as X-ray analysis corroborates our interpretation. As bulk-phase nucleation obstructs carrier percolation paths within the thin-film phase, hitherto uncontrolled structural inhomogeneity might have caused conflicting reports about pentacene carrier mobility."

According to the news reporters, the research concluded: "Infrared-spectroscopic nano-imaging of nanoscale polymorphism should have many applications ranging from organic nanocomposites to geologic minerals."

For more information on this research see: Sub-micron phase coexistence in small-molecule organic thin films revealed by infrared nano-imaging. Nature Communications, 2014;5():160-165. Nature Communications can be contacted at: Nature Publishing Group, Macmillan Building, 4 Crinan St, London N1 9XW, England. (Nature Publishing Group - www.nature.com/; Nature Communications - www.nature.com/ncomms/)

Our news correspondents report that additional information may be obtained by contacting C. Westermeier, Neaspec GmbH, D-82152 Martinsried, Germany. Additional authors for this research include A. Cernescu, S. Amarie, C. Liewald, F. Keilmann and B. Nickel (see also Nanotechnology).

Keywords for this news article include: Europe, Germany, Nanoscale, Martinsried, Nanotechnology, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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