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Loosening the DNA wrapping around single-walled carbon nanotubes by increasing the strand length
In this study, we discuss the influence of DNA strand length on DNA wrapping of single-walled carbon nanotubes under high-shear sonication and find that different strand length results in changed DNA-nanotube interaction, which is sensitively probed by the upshift extent of the Raman radial breathin...
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Published in: | Nanotechnology 2009-05, Vol.20 (19), p.195603-195603 |
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container_end_page | 195603 |
container_issue | 19 |
container_start_page | 195603 |
container_title | Nanotechnology |
container_volume | 20 |
creator | Yang, Quan-Hong Wang, Qi Gale, Nittaya Oton, Claudio J Cui, Lan Nandhakumar, Iris S Zhu, Zhenping Tang, Zhiyuan Brown, Tom Loh, Wei H |
description | In this study, we discuss the influence of DNA strand length on DNA wrapping of single-walled carbon nanotubes under high-shear sonication and find that different strand length results in changed DNA-nanotube interaction, which is sensitively probed by the upshift extent of the Raman radial breathing mode bands of nanotubes due to DNA wrapping. The difference in the interaction between nanotubes and DNA strands of various length results in apparently different degrees of wrapping compactness, revealed by atomic force microscopy observations, and nanotube selectivity in wrapping, indicated by both Raman and photoluminescence spectroscopy results. The above findings can be utilized to precisely control the nanotube diameter distribution and modulate the physicochemical properties of the nanotube wrapped by DNA without any direct functionalization of nanotubes. This finding is of considerable interest from both theoretical and practical standpoints. |
doi_str_mv | 10.1088/0957-4484/20/19/195603 |
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The difference in the interaction between nanotubes and DNA strands of various length results in apparently different degrees of wrapping compactness, revealed by atomic force microscopy observations, and nanotube selectivity in wrapping, indicated by both Raman and photoluminescence spectroscopy results. The above findings can be utilized to precisely control the nanotube diameter distribution and modulate the physicochemical properties of the nanotube wrapped by DNA without any direct functionalization of nanotubes. 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The difference in the interaction between nanotubes and DNA strands of various length results in apparently different degrees of wrapping compactness, revealed by atomic force microscopy observations, and nanotube selectivity in wrapping, indicated by both Raman and photoluminescence spectroscopy results. The above findings can be utilized to precisely control the nanotube diameter distribution and modulate the physicochemical properties of the nanotube wrapped by DNA without any direct functionalization of nanotubes. 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The difference in the interaction between nanotubes and DNA strands of various length results in apparently different degrees of wrapping compactness, revealed by atomic force microscopy observations, and nanotube selectivity in wrapping, indicated by both Raman and photoluminescence spectroscopy results. The above findings can be utilized to precisely control the nanotube diameter distribution and modulate the physicochemical properties of the nanotube wrapped by DNA without any direct functionalization of nanotubes. This finding is of considerable interest from both theoretical and practical standpoints.</abstract><cop>England</cop><pub>IOP Publishing</pub><pmid>19420642</pmid><doi>10.1088/0957-4484/20/19/195603</doi><tpages>1</tpages></addata></record> |
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subjects | Computer Simulation Crystallization - methods DNA - chemistry DNA - ultrastructure Macromolecular Substances - chemistry Materials Testing Models, Chemical Models, Molecular Molecular Conformation Nanotechnology - methods Nanotubes, Carbon - chemistry Nanotubes, Carbon - ultrastructure Particle Size Surface Properties |
title | Loosening the DNA wrapping around single-walled carbon nanotubes by increasing the strand length |
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