Cited 5 time in webofscience Cited 5 time in scopus

On-chip magnetometer for characterization of superparamagnetic nanoparticles

Title
On-chip magnetometer for characterization of superparamagnetic nanoparticles
Authors
Kim, Kun WooReddy, VenuTorati, Sri RamuluHu, Xing HaoSandhu, AdarshKim, Cheol Gi
DGIST Authors
Kim, Cheol Gi
Issue Date
2015
Citation
Lab on a Chip: Miniaturisation for Chemistry and Biology, 15(3), 696-703
Type
Article
Article Type
Article
Keywords
ChemistryControlled StudyDevicesElectric PotentialLab-on-A-ChipLab-on-A-Chip DevicesMagnetic Nano-ParticleMagnetite NanoparticleMagnetite NanoparticlesMagnetometerMagnetometryNanoanalysisNanofabricationNanosensorOscillationParticle SizePriority JournalSignal DetectionSuperparamagnetic NanoparticleUnclassified Drug
ISSN
1473-0197
Abstract
An on-chip magnetometer was fabricated by integrating a planar Hall magnetoresistive (PHR) sensor with microfluidic channels. The measured in-plane field sensitivities of an integrated PHR sensor with NiFe/Cu/IrMn trilayer structure were extremely high at 8.5 μV Oe-1. The PHR signals were monitored during the oscillation of 35 pL droplets of magnetic nanoparticles, and reversed profiles for the positive and negative z-fields were measured, where magnitudes increased with the applied z-field strength. The measured PHR signals for 35 pL droplets of magnetic nanoparticles versus applied z-fields showed excellent agreement with magnetization curves measured by a vibrating sample magnetometer (VSM) of 3 μL volume, where a PHR voltage of 1 μV change is equivalent to 0.309 emu cc-1 of the volume magnetization with a magnetic moment resolution of ∼10-10 emu. © The Royal Society of Chemistry 2015.
URI
http://hdl.handle.net/20.500.11750/5228
DOI
10.1039/c4lc01076k
Publisher
Royal Society of Chemistry
Related Researcher
  • Author Kim, Cheol Gi Lab for NanoBio-MatErials & SpinTronics(nBEST)
  • Research Interests Magnetic Materials and Spintronics; Converging Technology of Nanomaterials and Biomaterials; Bio-NEMS;MEMS
Files:
There are no files associated with this item.
Collection:
Emerging Materials ScienceLab for NanoBio-Materials & SpinTronics(nBEST)1. Journal Articles


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