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Growth of Atomically Smooth Films of Metal–Arachidates by Langmuir-Blodgett Technique

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In this paper, we report synthesis of atomically smooth Ni–arachidate films using Langmuir-Blodgett technique. The interaction between arachidic acid monolayer and nickel ion has been investigated as a function of subphase pH by measuring the compression isotherms at the air/water interface. As the pH is increased, the compressible liquid (L2) phase is observed over a smaller range of surface pressure (π) and area/mol (A) until at high enough pH the L2 phase is altogether absent. A further increase in pH does not result in any additional change in the isotherm. This is a general trend observed for all bivalent cations but the disappearance of L2 phase occurs at different pH values for different ions. The atomically smooth monolayers are deposited when the pressure is beyond the L2 phase (typically ∼35 mN/m). Along with the isotherms, monolayer of nickel arachidate deposited on mica, were studied thoroughly using Atomic force Microscopy. Atomic force microscope images show atomically smooth and defect free surface of nickel arachidate transferred on mica substrate. The images allow proper determination of the lattice vectors.
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Keywords: ATOMIC FORCE MICROSCOPY; COMPRESSIBLE LIQUID (L2) PHASE; LANGMUIR-BLODGETT TECHNIQUE

Document Type: Research Article

Publication date: 01 September 2009

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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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