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Dendron-Polymer Hybrids as Tailorable Coronae of Single-Walled Carbon Nanotube

preprint
submitted on 20.04.2021, 08:38 and posted on 20.04.2021, 13:15 by Verena Wulf, Gadi Slor, Parul Rathee, Roey J. Amir, Gili Bisker
Single-walled carbon nanotubes (SWCNTs), non-covalently functionalized by synthetic polymers, find widespread applications including sensing and imaging. Identifying new amphiphiles with interchangeable building blocks that can form unique coronae around the SWCNT, customized for a specific application, is thus of great interest. We present polymer-dendron hybrids, composed of hydrophobic dendrons and hydrophilic polyethylene glycol (PEG), as amphiphilic macromolecules with high degree of structural freedom, for suspending SWCNTs in aqeous solution. Based on a set of four PEG-dendrons differing in their dendritic end-groups, we show thst differences in the chemical structure of the hydrophobic end-groups control the interactions of the PEG-dendrons with the SWCNT-surface. These interactions led to differences in the intrinsic near-infrared fluorescence emission of the SWCNTs and affected the PEG-dendron susceptibility to enzymatic degradation, which was monitored by the SWCNT fluorescent signal. Our findings open new avenues for rational design of SWCNT functionalization, and optical sensing of enzymatic activity

History

Email Address of Submitting Author

bisker@tauex.tau.ac.il

Institution

Tel Aviv University

Country

Israel

ORCID For Submitting Author

0000-0003-2592-7956

Declaration of Conflict of Interest

The authors declare no conflict of interest.

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