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Atomic Force Microscopic Observation of the Molecular Orientation in Ultrathin Films of Alkanoic Acid-Derivatized Porphyrins on a Mica Surface

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The observation of the molecular orientation of alkanoic acid-derivatized porphyrins in ultrathin films deposited on mica was carried out by atomic force microscopy. It was observed that the tetraacid derivative 5,10,15,20-tetra(N-10-carboxydecyl-pyridinium-4-yl) porphyrin was arranged as a monolayer with the porphyrin macrocycle oriented coplanar to the mica surface. On the other hand, the diacid derivative protoporphyrin IX Zn(II) formed a bilayer with the hydrophobic part inside and the hydrophilic part in the periphery. Therefore, in this case, the porphyrin macrocycle is roughly perpendicular to the mica surface.
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Keywords: ALKANOIC ACID-DERIVATIZED PORPHYRIN; ATOMIC FORCE MICROSCOPY; BILAYER; MICA SURFACE; MOLECULAR ORIENTATION; MONOLAYER; PORPHYRIN; ULTRATHIN FILM

Document Type: Communications

Affiliations: 1: Research Center for Materials Science, Nagoya University, Nagoya 464-8602, Japan; Faculty of Science, Nagoya University, Nagoya 464-8602, Japan 2: Faculty of Science, Nagoya University, Nagoya 464-8602, Japan 3: Research Center for Materials Science, Nagoya University, Nagoya 464-8602, Japan

Publication date: 2002-02-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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