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Abstract
Quantum well defect-modified single walled carbon nanotubes are environmentally sensitive nanomaterials with wide-ranging applications in biosensing, imaging, light harvesting, quantum computing, energy storage and catalysis. The most common method for covalent functionalization of nanotubes for biosensing applications involves reactions with aryl diazonium salts to generate sp3 aryl defect sites, commonly followed by wrapping with single stranded DNA. We describe herein a rapid aryl diazonium functionalization reaction directly compatible with DNA-wrapped nanotubes. The reaction uses mild aqueous conditions at physiological pH and can be easily monitored in real-time via fluorescence analysis to control the degree of functionalization. Overall, this reaction greatly simplifies the production of covalently functionalized DNA-wrapped carbon nanotubes, expanding their potential for industrial and biomedical applications.
Supplementary materials
Title
Supplementary information
Description
Supporting information includes Figure S1. Center wave-lengths of emission peaks of (GT)15-NO2-QWNTs during functionalization; Figure S2. Absorbance spectra of (GT)15-SWCNTs and (6,5)-purified SWCNTs; Table S1. Center wave-lengths of emission peaks of (GT)15-QWNTs prepared using other diazonium salts and anilines; Table S2. Center wavelengths of emission peaks of NO2-QWNTs prepared using other polymer wrappings.
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