期刊
RSC ADVANCES
卷 6, 期 71, 页码 67204-67211出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra06584h
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资金
- Aim for the Top University Plan of the National Taiwan University of Science and Technology
- Ministry of Science and Technology of Taiwan [MOST 104-2221-E-011-155-]
A novel, flexible, freestanding, and large-scale substrate for surface-enhanced Raman spectroscopy (SERS) was successfully prepared by coaxial electrospraying. Nanohybrids of silver nanoparticles (AgNPs)/triblock copolymer surfactant (copolymer)/silicate nanoplatelets (Ag@silicate) were prepared by the in situ reduction of AgNO3 in the presence of silicate platelets and a polymeric surfactant. Nonwoven mats of the hybrids were prepared via coaxial electrospraying, assembling Ag@silicate hybrids outside a poly(vinyl alcohol) (PVA) surface to form core-shell microstructures. Characterization showed that the core-shell Ag@silicate/PVA nanosphere substrate significantly enhanced the SERS signal intensity, with enhancement values approaching 5.1 x 10(5) for adenine molecules from DNA. These core-shell nanosphere hybrids fabricated by electrospraying have great potential as SERS substrates in biosensor technology.
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