Solution Phase Interactions Controlled Ordered Arrangement of Gold Nanoparticles in Dried State

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Abstract:

Gold (Au) nanoparticles (NPs) were synthesized in the presence of water soluble biomolecules such as DNA, chitosan, phospholipids, and BSA by using seed-mediated approach at room temperature. All reactions produced mostly spherical geometries with comparable size (≤20 nm). The NPs were arranged in a typical pearl-necklace type arrangement except in the presence of BSA. Different measurements such as UV-visible, TEM, XRD, and XPS were used to characterize the Au NPs. Fluorescence spectroscopy was used to identify the interactions between biomolecules and blank (uncapped) Au NPs in aqueous colloidal solutions. It was concluded that the favorable interactions between Au NPs and biomolecules in aqueous phase, in fact, drive them into pearl-necklace type arrangement in the dried state.

Keywords: BIOCONJUGATE MATERIALS; BIOMOLECULES; GOLD NANOPARTICLES; SEED-GROWTH METHOD

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2050

Publication date: March 1, 2010

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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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