Submicrometer hall sensors for superparamagnetic nanoparticle detection

Goran Mihajlović, Peng Xiong, Stephan Von Molnár, Mark Field, Gerard J. Sullivan, Keita Ohtani, Hideo Ohno

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Submicrometer Hall sensors, with Hall cross width of ∼250 nm, were fabricated from InAs/AlSb quantum well semiconductor heterostructures. The room-temperature device characteristics were examined by experimental Hall effect and electronic noise measurements combined with analytical calculations. The noise-equivalent magnetic moment resolution of the order of 10 4μB/√Hz was obtained at frequencies above ∼1 kHz. We show that the devices can achieve single superparamagnetic nanoparticle detection and thus be employed in experiments involving single magnetically labeled biomolecule detection.

Original languageEnglish
Pages (from-to)2400-2402
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number6
Publication statusPublished - 2007 Jun


  • Biodetection
  • InAs quantum well
  • Magnetic nanoparticles
  • Submicrometer Hall sensor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


Dive into the research topics of 'Submicrometer hall sensors for superparamagnetic nanoparticle detection'. Together they form a unique fingerprint.

Cite this