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Nanocracking and metallization doubly defined large-scale 3D plasmonic sub-10 nm-gap arrays as extremely sensitive SERS substrates
Pan RH; Yang Y; Wang YJ; Li S(李爽); Liu Z; Su YW(苏业旺); Quan BG; Li YL; Gu CZ; Li JJ
2018-02-21
发表期刊NANOSCALE
卷号10期号:7页码:3171-3180
ISSN2040-3364
摘要Considering the technological difficulties in the existing approaches to form nanoscale gaps, a convenient method to fabricate three-dimensional (3D) sub-10 nm Ag/SiNx gap arrays has been demonstrated in this study, controlled by a combination of stress-induced nanocracking of a SiNx nanobridge and Ag nanofilm deposition. This scalable 3D plasmonic nanogap is specially suspended above a substrate, having a tunable nanogap width and large height-to-width ratio to form a nanocavity underneath. As a surface-enhanced Raman scattering (SERS) substrate, the 3D Ag/SiNx nanogap shows a large Raman enhancement factor of similar to 10(8) and extremely high sensitivity for the detection of Rhodamine 6G (R6G) molecules, even down to 10(-16) M, indicating an extraordinary capability for single-molecule detection. Further, we verified that the Fabry-Perot resonance occurred in the deep SiNx nanocavity under the Ag nanogap and contributed prominently to a tremendous enhancement of the local field in the Agnanogap zone and hence ultrasensitive SERS detection. This method circumvents the technological limitations to fabricate a sub-10 nm metal nanogap with unique features for wide applications in important scientific and technological areas.
DOI10.1039/c7nr08646f
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收录类别SCI ; EI
语种英语
WOS记录号WOS:000425348100009
关键词[WOS]SURFACE-ENHANCED RAMAN ; MOLECULAR JUNCTIONS ; LARGE-AREA ; SPECTROSCOPY ; SCATTERING ; FABRICATION ; MICROORGANISMS ; LITHOGRAPHY ; NANOANTENNA ; NANOGAPS
WOS研究方向Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS类目Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
项目资助者Ministry of Science and Technology of China [2016YFA0200800, 2016YFA0200400, 2016YFB0100500] ; National Natural Science Foundation of China [11674387, 91323304, 11704401, 61390503, 11574385, 11574368] ; Strategic Priority Research Program of CAS [XDB07020200] ; Key Research Program of Frontier Sciences, CAS [QYZDJ-SSW-SLH042]
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力学所作者排名4
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77803
专题非线性力学国家重点实验室
作者单位1.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Phys Sci, CAS Key Lab Vacuum Phys, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
4.Collaborat Innovat Ctr Quantum Matter, Beijing, Peoples R China
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Pan RH,Yang Y,Wang YJ,et al. Nanocracking and metallization doubly defined large-scale 3D plasmonic sub-10 nm-gap arrays as extremely sensitive SERS substrates[J]. NANOSCALE,2018,10(7):3171-3180.
APA Pan RH.,Yang Y.,Wang YJ.,李爽.,Liu Z.,...&Li JJ.(2018).Nanocracking and metallization doubly defined large-scale 3D plasmonic sub-10 nm-gap arrays as extremely sensitive SERS substrates.NANOSCALE,10(7),3171-3180.
MLA Pan RH,et al."Nanocracking and metallization doubly defined large-scale 3D plasmonic sub-10 nm-gap arrays as extremely sensitive SERS substrates".NANOSCALE 10.7(2018):3171-3180.
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