Microfabrication of nanowires-based GMR biosensor

R. Bellamkonda, T. John, B. Mathew, M. Decoster, H. Hegab, J. Palmer, D. Davis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


This study focuses on the development of current-perpendicular-to plane (CPP) Giant Magnetoresistance (GMR) of CoNiCu/Cu multilayered nanowire based microfluidic sensors for the detection of magnetic nanoparticles and fluids. The visible measurable variations in electrical voltage due to changes in external magnetic field are later to be monitored in microfluidic biosensor for the detection of toxicants in cells. An early prototype device was fabricated and tested using both an aqueous nonmagnetic medium (water) and a commercially available ferrofluid solution. A magnetic field of 0.01T caused a resistance change of 1.37% for ferrofluid, while a 1.1% GMR was recorded for the water baseline.

Original languageEnglish
Title of host publicationMicro- and Nanotechnology Sensors, Systems, and Applications
Publication statusPublished - 2009
Externally publishedYes
EventMicro- and Nanotechnology Sensors, Systems, and Applications - Orlando, FL, United States
Duration: Apr 15 2009Apr 17 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceMicro- and Nanotechnology Sensors, Systems, and Applications
Country/TerritoryUnited States
CityOrlando, FL


  • Ferrofluid
  • Giant magnetoresistance (GMR)
  • Hall measurements
  • Magnetic field
  • Microfluidic sensor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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