Ultrasensitive SERS Detection by Defect Engineering on Single Cu<sub>2</sub> O Superstructure Particle.

Lin, Jie; Shang, Yang; Li, Xiaoxia; Yu, Jian; Wang, Xiaotian; Guo, Lin · Adv Mater · 2017

basic_science · Level V

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Abstract

A Cu<sub>2</sub> O superstructure is constructed through a recrystallization-induced self-assembly strategy. Single Cu<sub>2</sub> O superstructure particle exhibits an outstanding surface-enhanced Raman spectroscopy performance with the limit of detection as low as 10<sup>-9</sup> mol L<sup>-1</sup> and metal comparable enhancement factor (8 × 10<sup>5</sup> ) due to the synergetic effect of vacancies defect-facilitated charge-transfer process and copper vacancies defect-induced electrostatic adsorption.