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Grafting of mPEG–SH chains on a Au-coated microcantilever surface. (A) Deflection of the sensing (red) and the reference microcantilevers (blue) upon injection of different mPEG–SH dilutions. The vertical dotted lines indicate the beginning of the injection of a new sample concentration. Each curve represents the aligned and averaged data from at least three microcantilevers. (B) Differential deflection of sensing microcantilevers after subtraction of the reference.
