文献类型：期刊文献

英文题名：Facile in situ synthesis of core-shell MOF@Ag nanoparticle composites on screen-printed electrodes for ultrasensitive SERS detection of polycyclic aromatic hydrocarbons

作者：Li, Dan[1];Cao, Xiukai[1];Zhang, Qinmei[1];Ren, Xingang[2];Jiang, Lei[3,4];Li, Dawei[3,4];Deng, Wei[1];Liu, Haitao[1]

机构：[1]Shanghai Inst Technol, Sch Chem & Environm Engn, 100 Haiquan Rd, Shanghai 201418, Peoples R China;[2]Anhui Univ, Minist Educ, Key Lab Intelligent Comp & Signal Proc, 3 Feixi Rd, Hefei 230039, Anhui, Peoples R China;[3]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：7

期号：23

起止页码：14108

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20192507060522);WOS:【SCI-EXPANDED(收录号:WOS:000472566400025)】；

基金：This research is supported by the National Natural Science Foundation of China (No. 21507089, 21777041, and 61701003), the Shanghai University Young Teacher Training Program (No. ZZyy15095), the Scientific Research Foundation for the Introduction of Talent of Shanghai Institute of Technology (No. YJ2015-6), the Shanghai Pujiang Program (No. 17PJD010), the Shanghai Municipal Education Commission (Plateau Discipline Construction Program), the Natural Science Research Foundation of Anhui Province (No. 1808085QF179), Open Fund for Discipline construction, Institute of Physical Science and Information Technology, Anhui University, and the Guangdong Science and Technology Program (2017B030314002).

语种：英文

外文关键词：Aromatization - Crystalline materials - Electrodes - Raman scattering - Substrates - Metal nanoparticles - Organometallics - Morphology - Electrodeposition - Shells (structures) - Silver nanoparticles - Surface scattering - Synthesis (chemical)

摘要：This paper reports the fabrication of a highly sensitive and reusable substrate for surface-enhanced Raman scattering (SERS) analysis. Core-shell metal-organic framework (MOF; HKUST-1)@Ag nanoparticles (NPs) are prepared on a screen-printed carbon electrode (SPCE) via in situ electrodeposition. The morphology and Ag coverage of core-shell structures can be easily controlled by electrodeposition potential and time without substrate motion. The HKUST-1(Cu)@Ag composites combine abundant SERS "hot spots" among the high-density Ag NPs and the excellent adsorption performance of the MOF, resulting in effective pre-concentration of analytes in close proximity to these "hot spots" and enhancement of SERS sensitivity. The optimized polyhedral HKUST-1@Ag structures exhibit high SERS activity for detecting 4-aminothiophenol at a concentration as low as 5 x 10(-10) M. More importantly, the polyhedral HKUST-1@Ag composites provide high sensitivity for detection of polycyclic aromatic hydrocarbons (PAHs) while preserving the cyclability and selectivity required for reliable quantitative analysis. The method is effective over a wide range of PAH concentrations (0.5 nM to 0.5 M), with detection limits as low as hundreds of pM. This study offers a new method to tailor the structure of MOF-based SERS substrates for on-site screening or point-of-care applications.