SU-8

Abstract(#br)SU-8 and polydimethylsiloxane (PDMS) are both transparent materials with properties very convenient for rapid prototyping of microfluidic systems. However, previous efforts of combining these two materials failed due to poor adhesion between them. Herein, we introduce a promising low-temperature technique (\u003c 100 °C) to irreversibly bond two or more structured layers of SU-8 and PDMS to create hybrid stacks. This offers new possibilities in design and fabrication of enclosed three-dimensional microstructures and microchannels with simple soft-lithography techniques.

Abstract(#br)We describe the use of light in a lithographic form of grayscale patterning as a means to program the properties and folding mechanics of flat, thin-film-polymeric materials. In this process, a finely dispersed (phase-separated) mixture of photoresist (SU-8 50) in polydimethylsiloxane (PDMS) is irradiated with ultraviolet light through a photomask. The subsequent photoresist cross-linking in the exposed regions causes changes in the material’s chemo-mechanical properties (notably making it stiffer and more resistant to solvent-induced swelling in the area of exposure).

Abstract(#br)Graphene has been attracting great attention from scientific community due to its astonishing mechanical, optical, and electrical properties, especially, graphene films synthesized by chemical vapor deposition (CVD) method are large, uniform and high-quality. CVD-grown graphene films have been successfully transferred onto various kinds of substrates such as SiO 2 /Si, quartz, PET, and plastics. However, graphene transfer onto polydimethylsiloxane (PDMS) substrates for device development has been limited due to the very low surface energy of PDMS.

Abstract\n\t\t\t\t\n\t\t\t\t\tThis study presents reports on the fabrication and testing of micro-nozzle/diffuser with curved profile boundary. In this paper, different polymers are used for the fabrication of micro-nozzle/diffuser, SU-8 negative bone photo-resist is introduced for the molding structure, and polydimethylsiloxane (PDMS) is used for the structure of nozzle/diffuser.