CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Bimetallic nano-mushrooms with DNA-mediated interior nanogaps for high-efficiency SERS signal amplification
Shen, JL; Su, J; Yan, J; Zhao, B; Wang, DF; Wang, SY; Li, K; Liu, MM; He, Y; Mathur, S; Fan, CH; Song, SP
2015
Source PublicationNANO RESEARCH
Volume8Issue:3Pages:731—742
Subtype期刊文献
AbstractUniform silver-containing metal nanostructures with well-defined nanogaps hold great promise for ultrasensitive surface-enhanced Raman scattering (SERS) analyses. Nevertheless, the direct synthesis of such nanostructures with strong and stable SERS signals remains extremely challenging. Here, we report a DNA-mediated approach for the direct synthesis of gold-silver nano-mushrooms with interior nanogaps. The SERS intensities of these nano-mushrooms were critically dependent on the area of the nanogap between the gold head and the silver cap. We found that the formation of nanogaps was finely tunable by controlling the surface density of 6-carboxy-X-rhodamine (ROX) labeled single-stranded DNA (ssDNA) on the gold nanoparticles. We obtained nano-mushrooms in high yield with a high SERS signal enhancement factor of similar to 1.0 x 10(9), much higher than that for Au-Ag nanostructures without nanogaps. Measurements for single nano-mushrooms show that these structures have both sensitive and reproducible SERS signals.
KeywordEnhanced Raman-scattering Single-molecule Gold Nanoparticles Au Nanoparticles Hot-spots Surface Spectroscopy Nanostructures Range Oligonucleotides
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24399
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Shen, JL,Su, J,Yan, J,et al. Bimetallic nano-mushrooms with DNA-mediated interior nanogaps for high-efficiency SERS signal amplification[J]. NANO RESEARCH,2015,8(3):731—742.
APA Shen, JL.,Su, J.,Yan, J.,Zhao, B.,Wang, DF.,...&Song, SP.(2015).Bimetallic nano-mushrooms with DNA-mediated interior nanogaps for high-efficiency SERS signal amplification.NANO RESEARCH,8(3),731—742.
MLA Shen, JL,et al."Bimetallic nano-mushrooms with DNA-mediated interior nanogaps for high-efficiency SERS signal amplification".NANO RESEARCH 8.3(2015):731—742.
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