TY - JOUR AU - Dao, Tran Cao AU - Luong, Truc Quynh Ngan AU - Cao, Tuan Anh AU - Kieu, Ngoc Minh PY - 2019/12/16 Y2 - 2024/03/29 TI - Detection of a Sudan dye at low concentrations by surface-enhanced Raman spectroscopy using silver nanoparticles JF - Communications in Physics JA - Comm. Phys. VL - 29 IS - 4 SE - Papers DO - 10.15625/0868-3166/29/4/14178 UR - https://vjs.ac.vn/index.php/cip/article/view/14178 SP - 521 AB - Sudan dyes are red colorants banned from use for food due to their toxic properties. However, because of the cheapness, they are sometimes adulterated into food illegally. Currently surface-enhanced Raman spectroscopy (SERS) is emerging as a good method to detect residues (including trace amounts) of Sudan dyes in food. In this report we present the SERS detection of Sudan I (a type of Sudan dyes) to concentrations as low as 1 ppb, using a very simple SERS substrate, which is made from silver nanoparticles chemically deposited on silicon surface. ER -