News Column

Studies from V. Iancu and Co-Researchers in the Area of Nanoporous Reported

February 28, 2014

By a News Reporter-Staff News Editor at Science Letter -- New research on Nanoporous is the subject of a report. According to news originating from Darmstadt, Germany, by NewsRx correspondents, research stated, "Nowadays molecular nanoporous networks have numerous uses in surface nanopatterning applications and in studies of host-guest interactions. Trimesic acid (TMA), a benzene derivative with three carboxylic groups, is a marvelous building block for forming 2D H-bonded porous networks."

Our news journalists obtained a quote from the research, "Here, we report a low-temperature study of the nanoporous 'chicken-wire' superstructure formed by TMA molecules adsorbed on a Au(111) surface. Distinct preferential orientations of the porous networks on Au(111) lead to the formation of peculiar TMA polymorphs that are stabilized only at the boundary between rotational molecular domains. Scanning tunneling microscopy (STM) and spectroscopy are used to investigate the electronic properties of both the molecular building blocks and the pores. Sub-molecular-resolution imaging and spatially resolved electronic spectroscopy reveal a remarkable change in the appearance of the molecules in the STM image's at energies in the range of the lowest unoccupied molecular orbital, accompanied by highly extended molecular wave functions into the pores. The electronic structure of the pores reflects a weak confinement of surface electrons by the TMA network."

According to the news editors, the research concluded: "Our experimental observations are corroborated by density-functional-theory-based calculations of the nanoporous structure adsorbed on Au(111)."

For more information on this research see: Probing the Electronic Properties of Trimesic Acid Nanoporous Networks on Au(111). Langmuir, 2013;29(37):11593-11599. Langmuir can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; Langmuir -

The news correspondents report that additional information may be obtained from V. Iancu, Iot Labs, D-64293 Darmstadt, Germany. Additional authors for this research include K.F. Braun, K. Schouteden and C. Van Haesendonck (see also Nanoporous).

Keywords for this news article include: Europe, Germany, Darmstadt, Nanoporous, Nanotechnology, Emerging Technologies

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Source: Science Letter

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