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Seeing electric current up close

NSF Award:

Arkansas ASSET II  (Arkansas Science & Technology Authority)

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NSF-funded researchers Gregory Salamo and Alan Mantooth have found a way to increase the amount of magnification possible for their joint micro-Hall sensor, a device that detects electric current indirectly through a generated magnetic field. The research was performed through the University of Alabama's Vertically-Integrated Center for Transformative Energy Research (VICTER).

Using LabVIEW, an advanced computational tool that measures pulse patterns in the magnetic field, the researchers visualized magnetization patterns at nanoscale dimensions. The micro-Hall sensor project also explores how temperature affects solar cell characteristics.  For these studies, Salamo discovered a method to improve the conductivity processes of solar cells using a quantum wire intermediate band. This approach could lead to increased solar cell efficiency.

Funding for this research was made possible through the Advancing and Supporting Science, Engineering and Technology (ASSET) Initiative, an NSF Experimental Program to Stimulate Competitive Research (EPSCoR) project administered by the Arkansas Science & Technology Authority. VICTER is a virtual collaboration between researchers at the University of Arkansas Fayetteville, Arkansas State University, the University of Arkansas at Little Rock and the University of Arkansas at Pine Bluff. The center's organization allows for maximum leveraging of equipment and human resources and expertise in addition to providing expanded learning opportunities for the 50 faculty and student research participants.


  • a micro-hall device enables researchers to see magnetic patterns in an electric current
With this device researchers can visualize an electric field's pulse patterns at nanoscale dimensions.
Vasyl Kunets, H. Alan Mantooth and Gregory Salamo, University of Arkansas

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