“A spiral channel with integrated microelectrodes for label-free particle lateral position and size characterization,” authored by Yunhao Peng, Bruce K. Gale, and Himanshu J. Sant, was recently published in Biomedical Microdevices.
In the article, a spiral-shaped microfluidic channel integrated with modified-trident shaped microelectrodes is utilized to analyze and quantify separation of different sized particles. Lateral particle position corresponds to the ratio of peak amplitudes, while peak amplitude indicates particle size and vertical position. The device yields a particle size estimate sensitivity of 2.15 µm/mV. The device fabrication process is displayed in the figure and the full journal article can be found at https://doi.org/10.1007/s10544-025-00742-5.