posted on 2021-12-11, 19:14authored byQiang Tang, Xiaofeng Liu, Xiaxia Cui, Zhenpeng Su, Huai Zheng, Jau Tang, Sang Woo Joo
Droplet
manipulation is the cornerstone of many modern technologies.
It is still challenging to drive the droplet motion on nonslippery
surfaces flexibly. We present a droplet manipulation method on nonslippery
polymer surfaces based on the corona discharge. With the corona discharge
of two-needle electrodes with opposite polarities, the droplet’s
charge polarity can be switched, which results in the directionally
droplet transport on a charged polymer surface with the oscillation.
Here, such droplet behaviors are presented in detail. Dependence of
the motion on the critical distance and driving distance between the
droplet and the needle electrode is revealed. The driving mechanism
is verified by experiments and simulations. This work enriches the
droplet manipulation techniques on nonslippery surfaces for various
applications, such as combinatory chemistry, biochemical, and medical
detection.