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Title: Synthesis and characterization of Fe{sub 3}O{sub 4}: Porous carbon nanocomposites for biosensor application

Fe{sub 3}O{sub 4}:Porous carbon (Fe{sub 3}O{sub 4}:PC) nano-magnetic composites were prepared by using different weight fractions of acid treated PC by the chemical co-precipitation route and annealed at 573 K, 773 K and 973 K temperatures in inert N{sub 2} gas atmosphere for 2 hrs to obtain desired stoichiometry of nanocomposites. The structural, morphological and magnetic properties of these composites were characterized by powder XRD, TEM, EPR and VSM analytical techniques. The crystallinity of the composites, g-value and spin concentration increases with increasing annealing temperature. TEM images confirmed the formation of nanosized ferrite nanoprticles whose size increases from 23 nm to 54 nm on increasing annealing temperature. Porous carbon increases porosity, coercivity and reduces saturation magnetization of these prepared nanocomposites.
Authors:
 [1] ;  [2]
  1. CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi-110012 (India)
  2. Department of Physics, Jamia Millia Islamia, New Delhi-110025 (India)
Publication Date:
OSTI Identifier:
22488821
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1675; Journal Issue: 1; Conference: AMRP-2015: 4. national conference on advanced materials and radiation physics, Longowal (India), 13-14 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANNEALING; CARBON; COERCIVE FORCE; CONCENTRATION RATIO; COPRECIPITATION; ELECTRON SPIN RESONANCE; FERRITES; G VALUE; IRON OXIDES; MAGNETIC PROPERTIES; MAGNETIZATION; NANOCOMPOSITES; NANOSTRUCTURES; POROSITY; POROUS MATERIALS; POWDERS; SYNTHESIS; TRANSMISSION ELECTRON MICROSCOPY; VIBRATING SAMPLE MAGNETOMETERS; X-RAY DIFFRACTION