Electronic Supplementary Information
Anisotropic magnetic field observed at 300 K in citrate coated iron oxide
nanoparticles: Effect of counterions
Sushil K. Misra • Lin Li
Department of Physics, Concordia University, Montreal, Quebec H3G 1M8, Canada
Sudip Mukherjee • Goutam Ghosh ()
UGC-DAE Consortium for Scientific Research, Mumbai Centre, Mumbai 400 085, India
E-mail: ghoshg@yahoo.com; ghoshg@csr.res.in
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Phase characterization by X-ray Diffraction (XRD) technique
Fig. S1 XRD pattern of the dried uncoated iron oxide nanoparticles. All peaks could be indexed
as the Fe3O4 phase [JCPDS card no. 82-1533]
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Surface coating analysis by Fourier-Transform Infra-Red (FTIR) spectroscopy
Fig. S2 FTIR spectra of TXC (blue curves) and TXC coated SC-NCs (brown curves) with X is
(a) L (Li), (b) S (Na), and (c) K (K). The broad band near 580 cm-1 corresponds to Fe-O
vibration in all samples. These spectra confirmed the presence of citrate coating around the core.
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