journal article·2017-03-01Open access

Efficient Enrichment and Self-Assembly of Hybrid Nanoparticles into Removable and Magnetic SERS Substrates for Sensitive Detection of Environmental Pollutants

Siying Tang, Yong Li, Hao Huang, Penghui Li, Zhinan Guo, Qian Luo, Zhe Wang, Paul K. Chu, Jia Li, Xue-Feng Yu

Abstract

A structure consisting of a low surface energy substrate and low surface tension liquid is designed and prepared by taking advantage of perfluorinated fluid infusion into the porous Teflon membrane. This slippery platform allows efficient enrichment and self-assembly of hybrid nanoparticles and the assembled structure can be detached from the membrane. A macroscale superlattice array of Au nanorods doped with magnetic Fe 3 O 4 nanoparticles is obtained by suppressing the outward capillary flow and coffee-ring effect during evaporative self-assembly. In SERS (surface enhanced Raman scattering) detection of environmental pollutants including thiram, diquat and polycyclic aromatic hydrocarbons, the removable plasmonic superlattice array with magnetic properties enables rapid separation of analytes from the solution resulting in excellent sensitivity and detection limits down to the nanomolar level. The self-assembly strategy shows great potential in the fabrication of removable 3D plasmonic superlattice arrays for SERS detections.
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Research context

OpenAlex topics: Hydrology and Watershed Management Studies · Soil erosion and sediment transport · Historical and socio-economic studies of Spain and related regions

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China

Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P.R. China

SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P. R. China

Funding

Research Grants Council, University Grants Committee · National Natural Science Foundation of China · Shenzhen Science and Technology Research Funding · SIAT-Gran-Biological Joint Laboratory · Natural Science Foundation of Guangdong Province · Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province

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