m-Cresol purple functionalized surface enhanced Raman scattering paper chips for highly sensitive detection of pH in the neutral pH range
m-Cresol purple functionalized surface enhanced Raman scattering paper chips for highly sensitive detection of pH in the neutral pH range
复制标题
间甲酚紫功能化表面增强拉曼散射纸芯片，用于高灵敏度检测中性 pH 范围内的 pH
作者：
Zou Xinxin;Wang Yunqing;Liu Wanhui;Chen Lingxin
本文选用间甲酚紫作为拉曼报告分子，制备了pH敏感的纸上Sers芯片。吸附的间甲酚紫的电子结构发生了可逆的变化，从非共振态转变为共振态，从而导致了拉曼信号强度的显著变化，这是由于传感模式从Sers转变为表面增强共振拉曼散射（SERRS）。该芯片具有灵敏的pH范围为6.0至8.0，并表现出良好的性能，用于检测天然水样的检测精度约为0.03 pH单位，这表明环境pH监测应用的巨大潜力。
Herein, a pH sensitive paper SERS chip was prepared by selecting m-cresol purple, a molecule with halochromic properties in the neutral pH range as a Raman reporter. The adsorbed m-cresol purple underwent a reversible change in its electronic configuration from a non-resonant species to a resonant species, which resulted in a significant Raman signal intensity variation due to the transformation of the sensing mode from SERS to surface-enhanced resonance Raman scattering (SERRS). The chips have a sensitive pH range of 6.0 to 8.0 and exhibited good performance for the detection of natural water samples with detection precision of approximately 0.03 pH units, suggesting great potential for environmental pH monitoring applications.