Self-Assembling Peptide Coatings Designed for Highly Luminescent Suspension of Single-Walled Carbon Nanotubes

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• 作者：Dmitri A. Tsyboulski ; Erica L. Bakota ; Leah S. Witus ; John-David R. Rocha ; Jeffrey D. Hartgerink ; R. Bruce Weisman
• 刊名：Journal of the American Chemical Society
• 出版年：2008
• 出版时间：December 17, 2008
• 年：2008
• 卷：130
• 期：50
• 页码：17134-17140
• 全文大小：468K
• 年卷期：v.130,no.50(December 17, 2008)
• ISSN：1520-5126

文摘

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 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.