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Magnetic Force Microscopy of an Oxygen‐Sensing Spin‐Probe
Author(s) -
Savla Mayur,
Pandian Ramasamy P.,
Kuppusamy Periannan,
Agarwal Gunjan
Publication year - 2008
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1560/ijc.48.1.33
Subject(s) - chemistry , magnetic force microscope , paramagnetism , electron paramagnetic resonance , spin (aerodynamics) , magnetic resonance force microscopy , microscopy , nanoparticle , nanotechnology , analytical chemistry (journal) , nuclear magnetic resonance , magnetic field , condensed matter physics , magnetization , ferromagnetic resonance , optics , physics , materials science , chromatography , quantum mechanics , thermodynamics
In the present work we provide magnetic force microscopy (MFM) analysis on particles of a paramagnetic spin‐probe lithium octa‐ n ‐butoxy‐naphthalo‐cyanine (LiNc‐BuO) used for EPR oximetry. We demonstrate how MFM can generate a magnetic contrast in ambient air for LiNc‐BuO particles when they assemble into structures >50 nm in size. The same sample when assembled into particles <10 nm in size failed to show contrast in MFM images. The potential for utilizing MFM to understand the magnetic signature of paramagnetic nanoparticles in biological samples is discussed.