Abstract: A microfluidic device molded in a single step provides a seamless fluid communication path from fluid input features to microfluidic channels. The device comprises a molded material which is formed around thread for forming high aspect ratio microfluidic channels. An associated method for the manufacture of the device is also provided.

Abstract: A method for creating a dynamic mold from a ferrofluid substrate in or adjacent to curable molding material is disclosed. A combination of magnetic elements is used to create a magnetic field that is capable of concentrating a ferrofluid substrate in a 3-D space. The ferrofluid substrate shapes a molding material to effect its shape. The ferrofluid, under the influence of a magnetic field, is capable of creating surface features and internal features in the molding material. Once cured or partially cured, the ferrofluid may be removed, resulting in features that are difficult to form by conventional methods.

Abstract: A microfluidic device molded in a single step provides a seamless fluid communication path from fluid input features to microfluidic channels. The device comprises a molded material which is formed around thread for forming high aspect ratio microfluidic channels. An associated method for the manufacture of the device is also provided.

Abstract: The present invention provides a method to cure material (polymer, metals) into a mold against the shape of a fluid (aka the substrate). The substrate is a ferrofluid, and its shape can be dictated by surrounding magnetic fields. By manipulating the applied magnetic fields, the ferrofluid can be formed into a specific shape; then, the curing material (in fluid or powder form) can be molded against that specific shape. The ferrofluid shape can further be changed during the curing step to impact the final shape. The methods of the present invention permit fast three-dimensional molding in a programmable fashion.