부산대학교 도서관

Nanoenzyme reactors based on shell-isolated colloidal plasmonic nanomaterials are well-established and widely applied in catalysis and surface-enhanced Raman scattering (SERS) sensing. In this study, a “double wing with one body” strategy was developed to establish a reduced food antiseptic sensing method using shell-isolated colloidal plasmonic nanomaterials. Gold nano particles (Au NPs) were used to synthesize the colloidal plasmonic nanomaterials, which was achieved by attaching ferrous ions (Fe[sup.2+]), ferric ions (Fe[sup.3+]), nitroso (NO[sup.−]) group, cyanogen (CN[sup.−]) group, and dopamine (DA) via coordinative interactions. The oxidation-induced reaction was utilized to generate •OH following the Fe[sup.2+]-mediated Fenton reaction with the shell-isolated colloidal plasmonic nanomaterials. The •OH generated in the cascade reactor had a high oxidative capacity toward acid preservatives. Importantly, with the introduction of the signal molecule DA, the cascade reactor exhibited also induced a Raman signal change by reaction with the oxidation product (malondialdehyde) which improved the sensitivity of the analysis. In addition, the stable shell-isolated structure was effective in realizing a reproducible and quantitative SERS analysis method, which overcomes previous limitations and could extend the use of nanoenzymes to various complex sensing applications.
Author(s): Linmin Chen [1]; Meihuang Zeng [1]; Jingwen Jin [2]; Qiuhong Yao [2]; Tingxiu Ye [3]; Longjie You [4]; Xi Chen (corresponding author) [5,*]; Xiaomei Chen (corresponding author) [1,*]; Zhiyong [...]