A digital microfluidic chip with programmable open system actuation and enhanced optical annealing with near‐infrared light

Abstract This work investigates a digital microfluidic chip and presents an advancement to microfluidic optical annealing methods through the application of whispering gallery mode (WGM) with near infrared excitation. Establishing a microfluidic chip with point‐of‐care capabilities, including actuation and annealing, has proven to be important. Unfortunately, poor heat absorption due to the long optical penetration depth of near infrared light creates scaling limitations for applications in optical‐based microfluidics. Through the application of WGM, the interaction length between the droplet and light is increased beyond the droplet diameter to improve heating and optical absorption. This is supported by finite‐difference time‐domain electromagnetic simulations and experimental results showing a greatly improved temperature change. Such a system is implemented in an open system digital microfluidic chip, to facilitate annealing via side illumination of droplets. The open system digital microfluidic chip is programmable for droplet actuation. The fundamental experiment of preprogrammed actuation of microdroplets is demonstrated in a 36 electrode grid. The results of annealing and actuation show potential for implementation in point‐of‐care microfluidic devices

GEOG 499: Sustainability Seminar

During the Spring of 2017, students of Geog 499 and faculty member John Krygier are working on sustainability projects including planning May Move Out, enhancing the reusable food containers, collaborating for green week activities, and organizing various gardening and food projects at OWU. The students are also involved with revising and promoting a campus-wide sustainability plan. There is a growing interest in sustainability on campus but little funding for projects, little comprehensive knowledge, and no sustainability coordinator. With some effort of a few students, faculty, and staff this challenge can be met. The main objectives for the group have been expanding learning opportunities for students who want to be more involved in sustainability on campus and actually changing university infrastructure to make sustainability possible