Magnetic nanofluid based non-enzymatic sensor for urea detection

  title={Magnetic nanofluid based non-enzymatic sensor for urea detection},
  author={A. W. Zaibudeen and John Charles Philip},
Abstract We demonstrate a simple, inexpensive and non-enzymatic optical probe for the detection of urea using functionalized magnetic nanofluid. The nanofluid used here is an oil-in-water magnetic nanoemulsion containing superparamagnetic iron oxide nanoparticles of size ∼10 nm. Under a constant magnetic field (∼90 G), the magnetic emulsion, forms a one dimensional Bragg diffraction grating with a fixed interparticle spacing. In the presence of urea, the probe showed a large wavelength shift in… CONTINUE READING