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. 2015 May 15;5:9756. doi: 10.1038/srep09756

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UV-Vis absorption spectra of serum samples spiked with non-target proteins (1 ng mL⁻¹) along with target proteins (100 fg mL⁻¹) under the ac-EHD field strength of f = 1 kHz at V_pp = 100 mV. Individual channels of the device were functionalized with specific capture antibody to detect target HER2 (red; channel-1), PSA (blue; channel-2) and/or IgG (green; channel-3) proteins, respectively. Inset shows naked eye detection of the detected target protein in each channel of the device under the applied ac-EHD field strength.