Research on Ultrasensitive Detecting Method Based on Surface Enhanced Raman Scattering Effect
Surface enhanced Raman scattering(SERS)spectroscopy has been reported as an ultrasensitive detecting method.Adding salts is a main way to induce nanoparticles aggregation to obtain giant enhancement of Raman signal.However,this method needs more procedures and the adding salts may interfere the detection reaction.Here an effective and simple method is reported to enhance SERS effect of the aggregation of silver nanoparticles(Ag NPs)induced by the laser of 633 nm.Ag NPs were prepared by plasmon-mediated method.Surface plasmon band of Ag NPs is~635 nm which could effectively absorb the 633 nm laser energy.When laser irradiating Ag NPs during the detection of Raman spectra,these Ag NPs gradually aggregated and SERS spectra of analytes(4-mercaptobenzoic acid,4-MBA)were gradually enhanced.And enhancement factor of Raman spectra~109 is obtained by this method.Due to the huge magnitude of SERS in the near infrared region(excitation wavelength 633 nm),this technique has the potential application in the field of biochemical tests.
SERS silver nanoprisms aggregation 633 nm laser
Jia Liu Yi Xu Changjun zhao Zhenqiong Lin
Guangzhou Intelligent Equipment Research Institute Co.Ltd.Guangzhou,510530,China
国际会议
2017年第2届联合国际信息技术、机械与电子工程国际会议(JIMEC2017)
重庆
英文
558-561
2017-10-04（万方平台首次上网日期，不代表论文的发表时间）