Reduction of CuO butterfly wing scales generates Cu SERS substrates for DNA base detection.
We prepare three-dimensional Cu plasmonic structures via a reduction of CuO photonic crystals replicated from butterfly wing scales. These Cu superstructures with high purity provide surface-enhanced Raman scattering (SERS) substrates for the label-free detection of DNA bases down to a micromolar level, which is achieved for the first time on Cu and even comparable to the detection-sensitivity for DNA bases on some Ag substrates. The generation of such superstructures has provided a substantial step for the biotemplated SERS substrates with high sensitivity, high reproducibility, and ultra-low cost to detect biomolecules, and presented affordable high-quality routine SERS consumables for corresponding biolaboratories.
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University , Shanghai, 200240, P. R. China.
Yongwen
Y
Tan
Jiajun
J
Gu
Wei
W
Xu
Zhipeng
Z
Chen
Dingxin
D
Liu
Qinglei
Q
Liu
Di
D
Zhang
D003300:Copper / Q000737:chemistry*; D004247:DNA / Q000032:analysis*; D006859:Hydrogen / Q000737:chemistry; D010084:Oxidation-Reduction; D017785:Photons; D012834:Silver / Q000737:chemistry; D013059:Spectrum Analysis, Raman; D013696:Temperature
D012834:Silver; D003300:Copper; D006859:Hydrogen; D004247:DNA; C030973:cupric oxide