By the polarization-modulated femtosecond laser-induced printing approach, the 100-nm-diameter gold particles are implant into the microchannels for in-situ Raman detection. Credit score: Yongxiang Hu, Yu Zhou, Guohu Luo, Dege Li and Minni Qu. Shanghai Jiao Tong College (SJTU) researchers have developed a extremely delicate and reusable surface-enhanced Raman spectroscopy (SERS) microfluidics system that has achieved