Automatic molecular collection and detection by using fuel-powered microengines.
We design and fabricate a simple self-powered system to collect analyte molecules in fluids for surface-enhanced Raman scattering (SERS) detection. The system is based on catalytic Au/SiO/Ti/Ag-layered microengines by employing rolled-up nanotechnology. Pronounced SERS signals are observed on microengines with more carrier molecules compared with the same structure without automatic motions.
Department of Physics and Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing 211189, P. R. China. tqiu@seu.edu.cn.
Di
D
Han
Department of Materials Science, Fudan University, Shanghai 200433, P. R. China. yfm@fudan.edu.cn.
Yangfu
Y
Fang
Department of Physics and Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing 211189, P. R. China. tqiu@seu.edu.cn.
Deyang
D
Du
Department of Materials Science, Fudan University, Shanghai 200433, P. R. China. yfm@fudan.edu.cn.
Gaoshan
G
Huang
Department of Physics and Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing 211189, P. R. China. tqiu@seu.edu.cn.
Teng
T
Qiu
Department of Materials Science, Fudan University, Shanghai 200433, P. R. China. yfm@fudan.edu.cn.
Yongfeng
Y
Mei