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Caption : figure s1. the a650/520 nm of supernatant under various concentrations of nacl.

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Caption : figure s2. the a650/520 ratio of supernatant under various concentrations of aptamer: (a) dxm, (b) sal and (c) rac.

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Caption : figure s3. single-functional aptamer/aunps sensor for dopes detection. scanning spectroscopy after adding different concentrations of (a) dex, (c) sal and (e) rac and the corresponding (b) dex, (d) sal and (f) rac a650/520 ratios.

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Caption : figure s4. the a650/520 ratio of supernatant under various concentrations of the mixed solution of dxm, sal and rac aptamers.