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Facile Control of DNA-Templated Inorganic Nanoshell Size

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We elaborated a facile method to control the size of CdS nanoshells obtained by DNA assisted "double templating" approach. By changing the concentration of NaCl in solution to vary the extent of DNA electrostatic deposition on cationic silica beads, we succeeded to control the density of DNA adsorbed on the beads, and further the density of CdS material grown on DNA. Further dissolution of the silica core triggers shrinking of CdS shell to a different extent depending on the CdS shell density and results in formation of CdS nanoshells of different sizes from ca. 100 nm to ca. 400 nm. Therefore, the main advantage of the proposed method is that it can be used to synthesize hollow nanoshells of various sizes, from ca. 25% to ca. 75% size of the primary template (silica bead), by using only one single primary template.


Document Type: Research Article


Publication date: 2012-01-01

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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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