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Protein Dispersant Binding on Nanotubes Studied by NMR Self-Diffusion and Cryo-TEM Techniques
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry (closed 20110630).
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry (closed 20110630).
2010 (English)In: JOURNAL OF PHYSICAL CHEMISTRY LETTERS, ISSN 1948-7185, Vol. 1, no 9, 1414-1419 p.Article in journal (Refereed) Published
Abstract [en]

Carbon nanotubes can be dispersed by a variety of molecules. We investigate the dynamics of protein-assisted carbon nanotube dispersion in water. We find that in equilibrium only a small fraction of the dispersants is indeed adsorbed to the nanotube Surface, while there is a fast exchange process between the adsorbed and free protein molecules. Self-diffusion NMR spectroscopy in combination with cryo-transmission electron microscopy imaging are employed.

Place, publisher, year, edition, pages
2010. Vol. 1, no 9, 1414-1419 p.
National Category
Physical Chemistry Materials Engineering Atom and Molecular Physics and Optics Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-27905DOI: 10.1021/jz100342cISI: 000277443200024Scopus ID: 2-s2.0-77952084269OAI: oai:DiVA.org:kth-27905DiVA: diva2:396859
Funder
Swedish Research Council
Note

QC 20110211

Available from: 2011-02-11 Created: 2011-01-03 Last updated: 2016-12-21Bibliographically approved
In thesis
1. Nano-segregated soft materials observed by NMR spectroscopy
Open this publication in new window or tab >>Nano-segregated soft materials observed by NMR spectroscopy
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis is about using nuclear magnetic resonance (NMR) spectroscopy for studying soft materials. Soft materials may be encountered everyday by most readers of this thesis, for example when taking a shower or watching TV. The usefulness of these materials originates from them being soft yet, at the same time, having some kind of a structure. The characteristic length scale of those structures is often on the order of nanometers (10-9 m) and the structure can respond to various external stimuli such as temperature, electric and magnetic fields, or the presence of interfaces.

NMR spectroscopy excels when studying soft materials because it is a non-invasive technique with a large spectral resolution. Moreover, different NMR methods allow us to study local molecular dynamics or longer-range translational diffusion. Understanding those latter aspects is very important for the development of dynamic and responsive materials.

Papers I-III present our work on assessing molecular adsorption on interfaces in colloidal dispersions. Here, carbon nanotubes (CNTs) or silica particles were the colloidal substrates to which proteins, polymers or surfactants adsorbed. Papers IV-VI concern ionic mobility in liquid crystals (LCs). The influence of material structure on, for example, the anisotropy of diffusion or on the association/dissociation of ions was studied in several LC phases.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2011. 46 p.
Series
Trita-CHE-Report, ISSN 1654-1081 ; 2011:12
Keyword
nuclear magnetic resonance, soft matter, colloidal dispersion, carbon nanotubes, colloidal silica, adsorption, liquid crystals, ionic liquids, diffusion
National Category
Physical Chemistry
Identifiers
urn:nbn:se:kth:diva-30337 (URN)978-91-7415-876-2 (ISBN)
Public defence
2011-03-18, Sal F3, Lindstedtsvägen 26, KTH, Stockholm, 09:30 (English)
Opponent
Supervisors
Note
QC 20110225Available from: 2011-02-25 Created: 2011-02-23 Last updated: 2011-02-25Bibliographically approved

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