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首页> 外文期刊>Japanese journal of applied physics >Removal of excess polymer from a suspension containing hybrids of thermoresponsive polymer and carbon nanotubes using aggregation phenomenon
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Removal of excess polymer from a suspension containing hybrids of thermoresponsive polymer and carbon nanotubes using aggregation phenomenon

机译：利用聚集现象从含有热敏性聚合物和碳纳米管杂化物的悬浮液中去除多余的聚合物

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摘要

Hybrids of organic molecules and single-walled carbon nanotubes (SWNTs) are attractive candidates for nanobiodevices. The removal of organic molecules after dispersing the SWNTs in organic media is a significant step in the preparation of these hybrid suspensions. We investigated the aggregation phenomenon in hybrids of poly(N-isopropylacrylamide) (PNIPAAm) and SWNTs. Our results indicate that the hybrids efficiently precipitated when a buffer or salt solution was added to the suspension at 25 degrees C. 4mM tris(hydroxymethyl) aminomethane hydrochloride (Tris-HCl) buffer was sufficient to precipitate the hybrids. Then, by repeated centrifugations and replacements of solvents, excess PNIPAAm molecules were efficiently removed from the suspension. Results of UV-vis spectroscopy and atomic force microscopy (AFM) suggest that the PNIPAAm-SWNT hybrids retained their hybridized structures even after the treatment process. However, the aggregation phenomenon was not observed at 4 degrees C. (C) 2016 The Japan Society of Applied Physics
机译：有机分子和单壁碳纳米管（SWNT）的混合体是纳米生物设备的诱人候选物。将SWNT分散在有机介质中后，去除有机分子是制备这些杂化悬浮液的重要步骤。我们调查了聚（N-异丙基丙烯酰胺）（PNIPAAm）和SWNTs的混合中的聚集现象。我们的结果表明，当在25摄氏度将缓冲液或盐溶液添加到悬浮液中时，杂种有效沉淀。4mM三（羟甲基）氨基甲烷盐酸盐（Tris-HCl）缓冲液足以沉淀杂种。然后，通过反复离心和置换溶剂，从悬浮液中有效去除了多余的PNIPAAm分子。紫外可见光谱和原子力显微镜（AFM）的结果表明，即使经过处理，PNIPAAm-SWNT杂化物仍保留了其杂化结构。但是，在4℃下未观察到聚集现象。（C）2016年日本应用物理学会

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    《Japanese journal of applied physics》 |2016年第9期|095003.1-095003.5|共5页
  • 作者

    Izumi Katsuki; Kumashiro Yoshikazu; Oura Shusuke; Okano Teruo; Umemura Kazuo;

  • 作者单位

    Tokyo Univ Sci, Grad Sch Math & Sci Educ, Shinjuku Ku, Tokyo 1628601, Japan;

    Tokyo Womens Med Univ, Inst Adv Biomed Engn & Sci, Shinjuku Ku, Tokyo 1620054, Japan;

    Tokyo Univ Sci, Grad Sch Sci, Dept Phys, Shinjuku Ku, Tokyo 1628601, Japan;

    Tokyo Womens Med Univ, Inst Adv Biomed Engn & Sci, Shinjuku Ku, Tokyo 1620054, Japan;

    Tokyo Univ Sci, Grad Sch Sci, Dept Phys, Shinjuku Ku, Tokyo 1628601, Japan;

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