DESIGN OF DIGITAL MICROFLUIDIC CARTRIDGE FOR BIOLOGICAL SAMPLE TRANSPORTATION BASED ON CLOSED ELECTROWETTING ON DIELECTRIC

• Main Author: Odelia
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/66866
• Institution: Institut Teknologi Bandung

Liquid processing is common for biologists and chemists. From the interview of students from the Microbiology Department of ITB (Bandung’s Institute of Technology), it was found that there are some issues when conducting mixing processes with small volumes (microliter order). One of the microbiology students says that there are some issues when the students use micropipette that they need to redo the process, which will take some time. By survey, to use a vortex mixer and centrifuge, they need to wait about 5-10 minutes. The survey shows that 16 out of 18 students couldn’t finish their experiment because of those problems. DMF is chosen as the solution to this problem. This device uses EWOD as a technique to manipulate droplet so they can move in the device. The designed cartridge in this report can process fluids by droplet transporting. To design the dimension of the cartridge’s electrodes, we assume the droplet has an initial contact angle of 90°. Mixing and fluid dispensing. Parafilm M as the dielectric layer with hydrophobic characteristics with an initial contact angle of 155°. Mixing is successfully done in 3 minutes and 54 seconds with an applied voltage of 300 VDC. 270 VDC is needed for fluid dispensing.