Passivation of Iron Particles for Use in Digital Magnetofluidics

Antonio Garcia (Inventor), Mark Hayes (Inventor)

Research output: Patent


Controlling drop movement on superhydrophobic surfaces is important in a number of technologies. For example, self-cleaning, superhydrophobic surfaces, microfluidics devices, and digital microfluidics can benefit from advances in developing non-wetting drops. To move water-based droplets, magnetic fields have been applied across a surface, but droplet movement is typically retarded by the low contact angle between the droplet and the surface. Researchers at Arizona State University have developed a magneto-fluidic device composed of a superhydrophobic surface and a fluid sample with magnetic particles coated with a passivating layer. Not only have the researchers shown controlled drop movement in a magnetic field, but also corrosion resistance against oxidizing agents. The ability to control discrete fluid droplets at fixed locations offers new opportunities for the micro-scale control of protein chemistry, detection, and measurement. Potential Applications Micro-scale fluidics Digital microfluidics Self-cleaning superhydrophobic surfacesBenefits and Advantages Controlled movement of droplets in magnetic field Corrosion resistant magnetic particles Able to fix droplet position for measurement and detectionDownload original PDFFor more information about the inventor(s) and their research, please see Dr. Gust's departmental webpageDr. Gust's research webpageDr. Hayes' departmental webpage Dr. Hayes' research webpage
Original languageEnglish (US)
StatePublished - Jul 24 2006


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