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(A) ssDNA detection determined by MSB measurement. Ratio of 5th and 3rd harmonics of two populations of mNPs, conjugated with two distinct DNA sequence respectively, determined by MSB measurement as a function of complementary DNA strand concentration. Three control samples were tested to confirm the specificity of the detection. (B) ssDNA with different length (24 mer, 20 mer and 16 mer) was investigated. A 24 mer ssDNA with non-complementary sequence as a control sample was tested.
