Fig. 2: Characterisation of colloidal AuNP substrates and their corresponding SERS enhancement using handheld spectroscopy. | npj Science of Food

Fig. 2: Characterisation of colloidal AuNP substrates and their corresponding SERS enhancement using handheld spectroscopy.

From: Handheld SERS coupled with QuEChERs for the sensitive analysis of multiple pesticides in basmati rice

Fig. 2

a AuNP substrates with wavelength max. (λmax) 519 nm (black line), 528 nm (red line), 536 nm (blue line) and 587 nm (pink line). b SERS enhancement of AuNP substrates in the presence of Rhodamine 6 G (R6G) (10−3 M). c SERS spectrum of AuNPs (λmax = 519 nm) with decreasing concentrations of R6G (10−3 M to 10−6 M, green line to red line, respectively) and the Raman spectra of R6G alone (10−5 M, black line) presenting no SERS. d AuNP substrates in the presence of carbendazim (100 ppm) and HCl (2 M).

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