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Synthesizing Dendronized Linear Polymers using "Click Chemistry"

  • Mynar Justin L.;Helms Brett;Hawker Craig J.;Frechet Jean M.J.
    • Proceedings of the Polymer Society of Korea Conference
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    • 2006.10a
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    • pp.317-317
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    • 2006

  • Dendronized linear polymers have recently come forward as new materials for nanoscale applications. These "molecular cylinders" may be modified with specific chemical makeup, rigidity, surface decoration, and backbone properties much like their spherical analogs, dendrimers. There exist three main synthetic pathways to yield dendronized polymers: (i) graft-to; (ii) graft-from; and (iii) macromonomer. We present an efficient "graft-to" approach towards dendronized microstructures utilizing click chemistry. With the capacity to manipulate their chemical composition, these dendronized structures have already found broad use in site-isolation for catalysis, nanolithography and organic light emitting diodes. These and other potential applications of these materials will be also presented.

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Biologically-Inspired Selective and Sensitive Trinitrotoluene Sensors Using Conjugated Lipid-like Polymer Nanocoatings for CNT-FET Sensors

  • Jaworski, Justyn;Kim, Tae-Hyun;Yokoyama, Keisuke;Chung, Woo-Jae;Wang, Eddie;Lee, Byung-Yang;Hong, Seung-Hun;Majumdar, Arun;Lee, Seung-Wuk;Kwon, Ki-Young
    • Proceedings of the Korean Vacuum Society Conference
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    • 2011.02a
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    • pp.495-495
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    • 2011

  • Miniaturized sensors capable of both sensitive and selective real-time monitoring of target analytes are tremendously valuable for various applications ranging from hazard detection to medical diagnostics. The wide-spread use of such sensors is currently limited due to insufficient selectivity for target molecules. We developed selective nanocoatings by combining trinitrotoluene (TNT) receptors bound to conjugated polydiacetylene (PDA) with single-walled carbon nanotube-field effect transistors (SWNT-FET). Selective binding events between TNT molecules and phage display derived TNT receptors were effectively transduced to sensitive SWNT-FET conductance sensors through the PDA coating. The resulting sensors exhibited unprecedented 1 fM sensitivity toward TNT in real time, with excellent selectivity over various similar aromatic compounds. Our biomimetic receptor coating approach may be useful for the development of sensitive and selective micro and nanoelectronic sensor devices for various other target analytes.

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