Figure 2.

(a) UV-vis and fluorescence spectra of Aβ (1–42). Fluorescence spectrum was obtained using a quartz cell with an optical path length of 1 cm, excitation wavelength at 280 nm, and 5, 5 nm slit width at the excitation and emission, respectively; (b) UV-vis and fluorescence spectra for Aβ (1–42) mixed (—) and conjugated (- - -) to QDs. Fluorescence spectrum was obtained using a quartz cell with an optical path length of 1 cm, excitation wavelength at 467 nm, and 2, 2 nm slit width at the excitation and emission, respectively.