Site-specific assembly of DNA and appended cargo on arrayed carbon nanotubes

Journal of the American Chemical Society

Volumn 126, Issue 40, 2004, Pages 12750-12751

  Taft, Bradford J ^a   Lazareck, Adam D ^b   Withey, Gary D ^b   Yin, Aijun ^b   Xu, J M ^b   Kelley, Shana O ^a  

^a BOSTON COLLEGE   (United States)

^b Brown University   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ALUMINUM OXIDE; CARBON NANOTUBE; DNA; NANOPARTICLE; OLIGONUCLEOTIDE;

ADSORPTION; ARTICLE; DNA HYBRIDIZATION; DNA SEQUENCE; DNA SYNTHESIS; IMAGE ANALYSIS; MATERIALS; SCANNING ELECTRON MICROSCOPY; SEQUENCE ANALYSIS; STRUCTURE ANALYSIS;

EID: 5644288495     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja045543d     Document Type: Article

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27. While the amide-coupling- and pyrene-adsorption-based attachment strategies were selective for the tips and sidewalls of the tubes, respectively, some cross-reactivity was observed. Defect sites displaying carboxylates along the sidewalls of CNTs are known to exist (Jiang, K.; Schadler, L. S.; Siegel, R. W.; Zhang, X.; Zhang, H.; Terrones, M. J. Mater. Chem. 2004, 14, 37-39), which explains the small amount of DNA attachment in this region of the CNT when amide coupling was used. The low levels of attachment of pyrene DNA to the tips of CNTs likely reflects incomplete oxidation or a low level of affinity of the modified oligonuclotides for the oxidized sites. It is noteworthy that when the dual functionalization procedure was carried out, almost no cross-reactivity was observed, indicating that the specificity of each coupling strategy predominated under competitive conditions.