We analysed sensitivity of high-density arrays of self-assembled gold nanoparticle clusters towards trace analyte detection and quantitative determination by surface enhanced Raman spectroscopy (SERS) employing an aromatic thiol as probe molecule. Periodic nanoscale arrays of gold nanoparticle clusters consisting of an average of 18 nanoparticles per cluster, and exhibiting mean inter-particle and inter-cluster separations below 10 nm were prepared using electrostatic self-assembly on block copolymer templates. The concentration dependent scaling of SERS intensities and the lowest detection limits on the cluster arrays on silicon substrate was probed using 1-naphthalenethiol (NT) as test molecule. The substrates show a detection limit of 10 nM along with high sensitivity to changes in NT concentration, which we attribute to high density of hot-spots uniformly organised across the surface. The capability for facile realisation of such arrays without a clean room environment or expensive tools makes the approach suitable for adoption for economic and high-performing SERS sensors.
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Natl Res Council Canada, Measurement Sci & Stand, Ottawa, ON K1A 0R6, CanadaNatl Res Council Canada, Measurement Sci & Stand, Ottawa, ON K1A 0R6, Canada
Milliken, Sarah
Fraser, Jeff
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Natl Res Council Canada, Measurement Sci & Stand, Ottawa, ON K1A 0R6, CanadaNatl Res Council Canada, Measurement Sci & Stand, Ottawa, ON K1A 0R6, Canada
Fraser, Jeff
Poirier, Shawn
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Natl Res Council Canada, Measurement Sci & Stand, Ottawa, ON K1A 0R6, CanadaNatl Res Council Canada, Measurement Sci & Stand, Ottawa, ON K1A 0R6, Canada
Poirier, Shawn
Hulse, John
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Natl Res Council Canada, Measurement Sci & Stand, Ottawa, ON K1A 0R6, CanadaNatl Res Council Canada, Measurement Sci & Stand, Ottawa, ON K1A 0R6, Canada
Hulse, John
Tay, Li-Lin
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Natl Res Council Canada, Measurement Sci & Stand, Ottawa, ON K1A 0R6, CanadaNatl Res Council Canada, Measurement Sci & Stand, Ottawa, ON K1A 0R6, Canada
机构:
Sogang Univ, Interdisciplinary Program & Integrated Biotechnol, Seoul 121742, South KoreaSogang Univ, Interdisciplinary Program & Integrated Biotechnol, Seoul 121742, South Korea
An, Jeung-Hee
El-Said, Waleed Ahmed
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Sogang Univ, Dept Chem & Biomol Engn, Seoul 121742, South KoreaSogang Univ, Interdisciplinary Program & Integrated Biotechnol, Seoul 121742, South Korea
El-Said, Waleed Ahmed
Yea, Cheol-Heon
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Sogang Univ, Interdisciplinary Program & Integrated Biotechnol, Seoul 121742, South KoreaSogang Univ, Interdisciplinary Program & Integrated Biotechnol, Seoul 121742, South Korea
Yea, Cheol-Heon
Kim, Tae-Hyung
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Sogang Univ, Dept Chem & Biomol Engn, Seoul 121742, South KoreaSogang Univ, Interdisciplinary Program & Integrated Biotechnol, Seoul 121742, South Korea
Kim, Tae-Hyung
Choi, Jeong-Woo
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Sogang Univ, Interdisciplinary Program & Integrated Biotechnol, Seoul 121742, South Korea
Sogang Univ, Dept Chem & Biomol Engn, Seoul 121742, South KoreaSogang Univ, Interdisciplinary Program & Integrated Biotechnol, Seoul 121742, South Korea
机构:
East China Normal Univ, Sch Chem & Mol Engn, Shanghai 200241, Peoples R ChinaEast China Normal Univ, Sch Chem & Mol Engn, Shanghai 200241, Peoples R China
Feng Enduo
Tian Yang
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East China Normal Univ, Sch Chem & Mol Engn, Shanghai 200241, Peoples R ChinaEast China Normal Univ, Sch Chem & Mol Engn, Shanghai 200241, Peoples R China