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Ag nanowire/nanoparticle-decorated MoS2 monolayers for surface-enhanced Raman scattering applications 被引量:2
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作者 Juan Li Weina Zhang +1 位作者 hongxiang lei Baojun Li 《Nano Research》 SCIE EI CAS CSCD 2018年第4期2181-2189,共9页
Developing well-defined nanostructures with superior surface-enhanced Raman scattering (SERS) performance is a critical and highly desirable goal for the practical applications of SERS in sensing and analysis. Here,... Developing well-defined nanostructures with superior surface-enhanced Raman scattering (SERS) performance is a critical and highly desirable goal for the practical applications of SERS in sensing and analysis. Here, a SERS-active substrate was fabricated by decorating a MoS2 monolayer with Ag nanowire (NW) and nanoparticle (NP) structures, using a spin-coating method. Both experimental and theoretical results indicate that strong SERS signals of rhodamine 6G (R6G) molecules can be achieved at "hotspots" formed in the Ag NW-Ag NP-MoS2 hybrid structure, with an enhancement factor of 106. The SERS enhancement is found to be strongly polarization dependent. The fabricated SERS substrate also exhibits ultrasensitive detection capabilities with a detection limit of 10-11 M, as well as reliable reproducibility and good stability. 展开更多
关键词 Ag nanowire-nanoparticle MoS2 monolayer surface-enhanced Raman scattering (SERS) polarization dependence
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Surface enhanced Raman scattering of gold nanoparticles aggregated by a gold-nanofilm-coated nanofiber 被引量:4
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作者 CHANG CHENG JUAN LI +1 位作者 hongxiang lei BAOJUN LI 《Photonics Research》 SCIE EI 2018年第5期357-362,共6页
Aggregation of metal nanoparticles plays an important role in surface enhanced Raman scattering (SERS). Here, a strategy of dynamically aggregating/releasing gold nanopartides is demonstrated using a gold-nanofilm-c... Aggregation of metal nanoparticles plays an important role in surface enhanced Raman scattering (SERS). Here, a strategy of dynamically aggregating/releasing gold nanopartides is demonstrated using a gold-nanofilm-coated nanofiber, with the assistance of enhanced optical force and plasmonic photothermal effect. Strong SERS signals of rhodamine 6G are achieved at the hotspots formed in the inter-particle and film-partide nanogaps. The proposed SERS substrate was demonstrated to have a sensitivity of 10-12 M, reliable reproducibility, and good stability. 展开更多
关键词 Surface enhanced Raman scattering of gold nanoparticles aggregated a gold-nanofilm-coated nanofiber
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Temperature-dependent resonance energy transfer from CdSe-ZnS core-shell quantum dots to monolayer MoS2 被引量:1
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作者 Juan Li Weina Zhang +2 位作者 Yao Zhang hongxiang lei Baojun Li 《Nano Research》 SCIE EI CAS CSCD 2016年第9期2623-2631,共9页
关键词 temperature dependence resonance energy transfer quantum DOTS MONOLAYER MOS2
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