Di Carlo Dino,Murray Coleman,Pao Edward,Tseng Peter
申请号：
US201515536122
公开号：
US10144911(B2)
申请日:
2015.12.15
申请国别(地区):
美国
年份:
2018
代理人:
Vista IP Law Group LLP
摘要：
A system is provided for the quantitative magnetic separation of magnetic objects (e.g., particles or cells). The system uses magnetic ratcheting over arrays of ferromagnetic elements having gradient spacing manifested in various pitch zones that are encountered by the magnetic objects as they traverse the array. The system can be used to separate and concentrate magnetic objects based on iron oxide content. For cells, different phenotypes may be separated based, for example, on surface expression of proteins or molecules that are bound to magnetic particles. The system includes a substrate or chip having the array of ferromagnetic elements with increasing lateral pitch and an externally driven magnet device that generates a cycling magnetic field. Magnetic objects with higher IOC separate and equilibrate along the array at larger pitches. The system can be used for the differential sorting of particles and cells of interest.
