Abstract
Single-walled carbon nanotubes (SWCNTs) have unique photophysical properties and promise many novel applications. Their functionalization is crucial, but the organic phase around SWCNTs is poorly understood. Noncovalent functionalization with single-stranded DNA (ssDNA) is one of the most used approaches to solubilize SWCNTs in water, and variation of ssDNA sequences leads to major advances in separation of SWCNT chiralities and SWCNT-based sensors. However, the exact number of adsorbed ssDNA molecules on ssDNA/SWCNT complexes and consequently the surface coverage are not precisely known. Here, we determine the number of adsorbed/bound ssDNA molecules per SWCNT for different ssDNA sequences. For this purpose, we directly quantify free and bound/adsorbed ssDNA and the concentration of SWCNTs using an approach based on filtration, absorption spectroscopy, and atomic force microscopy. We found that the number of adsorbed ssDNA molecules on 600 nm long (6,5)-SWCNTs varies between ∼860 for (GT)5 and ∼130 for (...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
