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Self-assembling peptide coatings designed for highly luminescent suspension of single-walled carbon nanotubes.

ABSTRACT: A series of self-assembling multidomain peptides have been designed, synthesized, and tested for their ability to individually suspend single-walled carbon nanotubes (SWCNTs) in water while preserving strong near-IR nanotube luminescence. Photometric and spectral measurements on individual SWCNTs revealed that emission in the common biocompatible coating agents Pluronic F127, ss-DNA, and BSA is approximately an order of magnitude weaker than in the bioincompatible ionic surfactant SDBS. By contrast, one of the engineered peptides gave SWCNT emission approximately 40% as intense as in SDBS. A strong inverse correlation was also found between the spectral line widths of coated SWCNTs and the efficiency of their emission. Peptides with rationally designed self-assembly properties appear to be promising coatings that may enable SWCNT optical sensing applications in biological environments.

SUBMITTER: Tsyboulski DA 

PROVIDER: S-EPMC2639792 | biostudies-literature | 2008 Dec

REPOSITORIES: biostudies-literature

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Self-assembling peptide coatings designed for highly luminescent suspension of single-walled carbon nanotubes.

Tsyboulski Dmitri A DA   Bakota Erica L EL   Witus Leah S LS   Rocha John-David R JD   Hartgerink Jeffrey D JD   Weisman R Bruce RB  

Journal of the American Chemical Society 20081201 50

A series of self-assembling multidomain peptides have been designed, synthesized, and tested for their ability to individually suspend single-walled carbon nanotubes (SWCNTs) in water while preserving strong near-IR nanotube luminescence. Photometric and spectral measurements on individual SWCNTs revealed that emission in the common biocompatible coating agents Pluronic F127, ss-DNA, and BSA is approximately an order of magnitude weaker than in the bioincompatible ionic surfactant SDBS. By contr  ...[more]

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