Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/617
Title: Azobenzene-based supramolecular polymers for processing MWCNTs
Authors: Maggini, L
Marangoni, T
Georges, B
Malicka, J M
Yoosaf, K
Minoia, A
Lazzaroni, R
Armaroli, N
Bonifazi, D
Keywords: Walled carbon-nanotubes
Noncovalent sidewall-functionalization
Photochromic switches
Reversible dispersion
Molecular switches
Optical-generation
Charge-transfer
Soft materials
Drug-delivery
Light
Issue Date: 2013
Publisher: Royal Society of Chemistry
Citation: Nanoscale 5(2):634-645;21 Jan 2013
Abstract: Photothermally responsive supramolecular polymers containing azobenzene units have been synthesised and employed as dispersants for multi-walled carbon nanotubes (MWCNTs) in organic solvents. Upon triggering the trans-cis isomerisation of the supramolecular polymer intermolecular interactions between MWCNTs and the polymer are established, reversibly affecting the suspensions of the MWCNTs, either favouring it (by heating, i.e. cis -> trans isomerisation) or inducing the CNTs' precipitation (upon irradiation, trans -> cis isomerisation). Taking advantage of the chromophoric properties of the molecular subunits, the solubilisation/precipitation processes have been monitored by UV-Vis absorption spectroscopy. The structural properties of the resulting MWCNT-polymer hybrid materials have been thoroughly investigated via thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and atomic force microscopy (AFM) and modelled with molecular dynamics simulations.
URI: http://hdl.handle.net/123456789/617
Appears in Collections:2013

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