Change search
ReferencesLink to record
Permanent link

Direct link
Nanomagnetic shielding: High-resolution NMR in carbon allotropes
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania.
CNRS Université Montpellier 2, France . (nanoMRI Group, Laboratoire des Colloïdes, Verres et Nanomatériaux)
European Theoretical Spectroscopy Facility (ETSF), Universidad del País Vasco UPV/EHU, Spain . (Dpto. Física de Materiales and Centro Mixto CSIC-UPV/EHU,)
Umeå University, Faculty of Science and Technology, Department of Physics. (Nanofysik och Material)
Show others and affiliations
2010 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 132, 021102- p.Article in journal (Refereed) Published
Abstract [en]

Theunderstanding and control of the magnetic properties of carbon-based materialsis of fundamental relevance in applications in nano- and biosciences.Ring currents do play a basic role in those systems.In particular the inner cavities of nanotubes offer an idealenvironment to investigate the magnetism of synthetic materials at thenanoscale. Here, by means of 13C high resolution NMR ofencapsulated molecules in peapod hybrid materials, we report the largestdiamagnetic shifts (down to −68.3 ppm) ever observed in carbonallotropes, which is connected to the enhancement of the aromaticityof the nanotube envelope upon doping. This diamagnetic shift canbe externally controlled by in situ modifications such as dopingor electrostatic charging. Moreover, defects such as C-vacancies, pentagons, andchemical functionalization of the outer nanotube quench this diamagnetic effectand restore NMR signatures to slightly paramagnetic shifts compared tononencapsulated molecules. The magnetic interactions reported here are robust phenomenaindependent of temperature and proportional to the applied magnetic field.The magnitude, tunability, and stability of the magnetic effects makethe peapod nanomaterials potentially valuable for nanomagnetic shielding in nanoelectronicsand nanobiomedical engineering

Place, publisher, year, edition, pages
American Institute of Physics , 2010. Vol. 132, 021102- p.
Keyword [en]
Peapods, carbon nanotubes, Nuclear magnetic resonance spectroscopy, magnetism
National Category
Condensed Matter Physics
Research subject
URN: urn:nbn:se:umu:diva-30797DOI: 10.1063/1.3284740ISI: 000273689000002OAI: diva2:286956
Available from: 2010-01-15 Created: 2010-01-15 Last updated: 2011-10-24Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Wågberg, ThomasTalyzin, Alexandr
By organisation
Department of Physics
In the same journal
Journal of Chemical Physics
Condensed Matter Physics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 70 hits
ReferencesLink to record
Permanent link

Direct link