Rapid Identification of Fupenzi (Rubus chingii Hu) and Its Adulteration by AuNP Visualization

Figure 6

TEM images and frequency histograms of AuNP mixtures with different concentrations (a–f) Adulterant concentrations of 0%, 1%, 2%, 5%, 10%, and 20%, respectively).

(a)

(b)

(c)

(d)

(e)

(f)