Fig. 2From: Fluorescent Nano-Biomass Dots: Ultrasonic-Assisted Extraction and Their Application as Nanoprobe for Fe3+ detectiona XRD pattern of the NBDs. b FTIR spectra of the soybean and NBDs. c XPS survey spectrum of the NBDs. High-resolution XPS spectra of C 1s (d), N 1s (e), and O 1s (f)Back to article page