Flow cytometry is a tool to characterize individual cells continuously in flow. It is important to make a single stream of cells focused in the device to detect the signal from the cells efficiently. Here, we utilize the fluid viscoelasticity for 3D particle focused flow of cells. Since the fluid speed for focusing is relevantly slow, we could acquire image of moving cells in real time and could also obtain various information of the cells continuously. The viscoelastic particle focusing could be achieved in a simple geometry: straight rectangular channel, we expect that this approach can be applied to various microfluidic systems containing multiple functions under flow condition.
We are grateful to Prof. Gabor Cscus for the support of project. This research was supported by Young Researchers\u2019 Exchange Program between Korea and Switzerland (2016K1A3A1A14953247) through the National Research Foundation of Korea (NRF).
