title: [Surface-enhanced Raman spectroscopy of riboflavin in silver colloids using 1 064 nm excitation].
abstract: Surface-enhanced Raman spectra (SERS) of riboflavin in silver colloids, using near-infrared (NIR) laser operating at 1 064 nm wavelength, were obtained. The enhancement factor was further increased by improving the preparation of silver colloid and with the addition of a small amount of NaOH. The detection limit was lower than 3.2 x 10(-10) mol x L(-1). It is concluded that the larger and aggregated silver particles were more efficient for the electromagnetic enhancement of NIR-SERS. Flavin ring was absorbed on the colloidal silver methal surface, standing on oxygens of C(20)=O) and C(4)=O.
authors.affiliation: Beijing Electronics Science and Technology College, 100070 Beijing.
authors.forename: Q
authors.initials: Q
authors.lastname: Dong
authors.forename: F
authors.initials: F
authors.lastname: Hu