Enhanced adsorption affinity of anionic perylene-based surfactants towards smaller-diameter SWCNTs
Backes C, Mundloch U, Schmidt C, Coleman JN, Wohlleben W, Hauke F, Hirsch A (2010)
Publication Language: English
Publication Type: Journal article, Original article
Publication year: 2010
Journal
Original Authors: Backes C., Mundloch U., Schmidt C.D., Coleman J.N., Wohlleben W., Hauke F., Hirsch A.
Publisher: Wiley-VCH Verlag
Book Volume: 16
Pages Range: 13185-13192
Journal Issue: 44
Abstract
We present evidence from multiple characterization methods, such as emission spectroscopy, zeta potential, and analytical ultracentrifugation, to shed light on the adsorption behavior of synthesized perylene surfactants on single-walled carbon nanotubes (SWCNTs). On comparing dispersions of smaller-diameter SWCNTs prepared by using cobalt-molybdenum catalysis (CoMoCAT) with the larger-diameter SWCNTs prepared by high-pressure carbon monoxide decomposition (HiPco), we find that the CoMoCAT-perylene surfactant dispersions are characterized by more negative zeta potentials, and higher anhydrous specific volumes (the latter determined from the sedimentation coefficients by analytical ultracentrifugation), which indicates an increased packing density of the perylene surfactants on nanotubes of smaller diameter. This conclusion is further supported by the subsequent replacement of the perylene derivatives from the nanotube sidewall by sodium dodecyl benzene sulfonate (SDBS), which first occurs on the larger-diameter nanotubes. The enhanced adsorption affinity of the perylene surfactants towards smaller-diameter SWCNTs can be understood in terms of a change in the supramolecular arrangement of the perylene derivatives on the scaffold of the SWCNTs. These findings represent a significant step forward in understanding the noncovalent interaction of π-surfactants with carbon nanotubes, which will enable the design of novel surfactants with enhanced selectivity for certain nanotube species. Nanotube surfactant design: The interactions of synthesized perylene-based surfactants with single-walled carbon nanotubes (SWCNTs) of various diameters have been investigated. The surfactants exhibit an enhanced adsorption affinity towards smaller-diameter SWCNTs (see figure), which could be of great importance for future nanotube separation by selective dispersion. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Authors with CRIS profile
Claudia Backes
Exzellenz-Cluster Engineering of Advanced Materials (EAM)
Udo Mundloch
Lehrstuhl für Organische Chemie II
Frank Hauke
Zentralinstitut für Neue Materialien und Prozesstechnik
Andreas Hirsch
Lehrstuhl für Organische Chemie II
Additional Organisation(s)
Involved external institutions
Ireland (IE)
Germany (DE)How to cite
APA:
Backes, C., Mundloch, U., Schmidt, C., Coleman, J.N., Wohlleben, W., Hauke, F., & Hirsch, A. (2010). Enhanced adsorption affinity of anionic perylene-based surfactants towards smaller-diameter SWCNTs. Chemistry - A European Journal, 16(44), 13185-13192. https://doi.org/10.1002/chem.201000232
MLA:
Backes, Claudia, et al. "Enhanced adsorption affinity of anionic perylene-based surfactants towards smaller-diameter SWCNTs." Chemistry - A European Journal 16.44 (2010): 13185-13192.
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