Abstract
AbstractA novel method of dynamically and selectively controlling the diffusion of molecules using aggregation of ferrofluid is proposed. This method can be used to mask specific locations on a surface for combinatorial chemistry or to restrict diffusion of molecules in selected areas in a microfluidic device. This method works by using the controlled aggregation of stabilized 10nm diameter iron oxide particles (ferrofluid) to slow the diffusion of molecules in a similar manner as to how a porous media restricts diffusion. Dynamic aggregate formation is controlled by a magnetic pattern on a substrate in conjunction with an external field. The external magnetic field bias applied to the system causes ferrofluid to aggregate only in designated areas around the magnetic patterns thereby slowing diffusion through the areas where the aggregate clouds have formed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
