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. Author manuscript; available in PMC: 2023 Jan 20.
Published in final edited form as: Colloids Surf A Physicochem Eng Asp. 2022 May 4;648:129147. doi: 10.1016/j.colsurfa.2022.129147

Fig. 5.

Fig. 5.

λ-DNA binding to Al3+ modified COC microchannel wall. (a)-(e) fluorescence image of λ-DNA binding to COC microchannel wall modified by AlCl3 having different concentrations. The scale bar is 15 μm in white. (f) the number of binding DNAs as a function of AlCl3 concentration. Data at 1 M is not available due to a large amount DNA was stuck to COC surface and got stretched during withdraw-and-refill process. Inset illustrates how negatively charged stained DNA binding to Al3+ modified COC substrate.