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Authors
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Kiriy, A. ; Gorodyska, G. ; Kiriy, N. ; Sheparovych, R. ; Lupytsky, R. ; Minko, S. ; Stamm, M.
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Title
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AFM Imaging of Single Polycation Molecules Contrasted with Cyanide-Bridged Compounds
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Date
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13.01.2006
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Number
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13818
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Abstract
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We developed the simple contrasting procedure to improve AFM visualization of singlepositively charged polymer chains via counterion exchange between Cl<SUP>-</SUP> anions and bulky hexacyanoferrateanions or negatively charged nanoclusters of Prussian Blue. This method allowed us to increase thicknessof the resulting structures up to 10 nm and, consequently, to provide visualization of isolated polymerchains deposited on a glass surface (root-mean-square roughness about 1 nm). In contrast, the contrastingwith relatively large PB clusters (more than 10 nm in size) distorts conformations of the molecules andeven eventually leads to a fragmentation of polymer chains.
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Publisher
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Macromolecules
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Wikidata
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Citation
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Macromolecules 38 (2006) 501-506
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DOI
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https://doi.org/10.1021/ma048454u
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Tags
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atomic-force microscope flexible polyelectrolyte molecules gold nanoparticles prussian blue particles globule surface chain dna
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