Simple Colorimetric Detection of Amyloid β-peptide (1–40) based on Aggregation of Gold Nanoparticles in the Presence of Copper Ions

Graphical A simple method for specific colorimetric sensing of Alzheimer's disease related amyloid- β peptide (A β ) is developed based on the aggregation of gold nanoparticles in the presence of copper ion. The detection of limit for A β (1–40) is 0.6 n m and the promising results from practical samples (human serum) indicate the great potential for the routine detection.