Figure 3
From: Colorimetric detection of individual biothiols by tailor made reactions with silver nanoprisms

pH effect on AgNPR-based biothiol detection. Absorption spectra and corresponding photograph images of AgNPRs in 1% human serum at (a) pH 5 and (b) pH 10. (1) indicates the absence of target (control), and (2–5) indicates the presence of Hcy, Cys, GSH, and His, respectively. The final concentration of Hcy, Cys, GSH, and His was 6 µM.