Is it possible to have permalloy rods with lengths considerably longer than 50 micrometers? These rods need to be integrated (bonded) on a biocompatible and nonferrous surface. the rods can be of rectangular or cylindrical cross-sections with an effective diameter of about 40 microns. The rod will be standing perpendicular to the that surface. The surface and the bonded permalloy rods can make one of the microchannel surfaces, the other surface can be a sealing surface that is in closer or direct contact to the tips of the mounted rods. Also, the rods are preferred to have a very thin coating of a biocompatible material. In a broad sense, the flow path (compromising a solution with suspended magnetic beads) will be simply like that of a flow past a bank of horizontal rods (or cylinders). The optical view would be perpendicular to the flow path.
Any comments on the feasibility of fabrication or about companies who might be capable of doing such fabrication is highly appreciated.
Dear Saud,
There are several ways to achieve your goal. The easiest one will be to use liquid metal for your rod.
Take a look to the following paper
Vol. 43, No. 4 April 2010 518-528 ACCOUNTS OF CHEMICAL RESEARCH
Cofabrication: A Strategy for Building Multicomponent Microsystems
ADAM C. SIEGEL, SINDY K. Y. TANG, CHRISTIAN A. NIJHUIS, MICHINAO HASHIMOTO, SCOTT T. PHILLIPS, MICHAEL D. DICKEY, AND GEORGE M. WHITESIDES
Regards
Ni Pillar array with good aspect ratio has been demonstrated long time ago and I belive the same aspect ratio with NiFe also can be done. It depends if you have an electropating system you can mold the pillar with positive photoresist or you can try electroless plating of NiCoP otherwise.
Dear Saud,
I think it is easier to find paramagnetic bieads of 50 micron diamter, and fill the suspension in a ready made microchannels of materials you prefer, for instance of glass substrate or transparent polymer for easy optical observation. Assembly of the rods consisting of the beads can be achieved by remote magnetic field. In such a way, it is also possible to replace the surface functionalized beads.
Good luck. Best
Dear Saud,
You can try contacting Liquids Research Ltd or IMTEK institute in Freiburg for polymer materials responding to a magnetic field, that can be processed into the form of thin high-aspect-ratio elements.
connected to a surface, forming artificial cilia.
- Badges
- Science topic
- Similar topics
- Engineering
- Thermal Engineering
- Thermofluid
- Fluid Mechanics
- Fluid Dynamics