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(a) Monitoring of the aggregation behavior of the Aβ40 solution with respect to the incubation time. All the incubation experiments were conducted using the 1 ng/mL Aβ40 monomer solution (n = 12); (b) The ΔR2 values of the rGO sensors at three different incubation times (no incubation, 4.5 h, and 10 days) (n = 12); (c) Selectivity test of rGO sensors by mixing both the monomer-rich (A) and fibril-rich (B) solutions.
