Nanoengineered Metasurface Immunosensor with over 1000-Fold Electrochemiluminescence Enhancement for Ultra-sensitive Bioassay

Li, Chuanping; Wang, Shanshan; Li, Haijuan; Saqib, Muhammad; Xu, Chen; Jin, Yongdong

doi:10.1016/j.isci.2019.06.042

Cited by 32 publications

(45 citation statements)

References 24 publications

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“…S12 and S13). This result can be construed as support for the involvement of surface plasmon (SP) coupling because with the decrease of the size of plasmonic NPs (typically within the tens of nanometers), the electromagnetic field intensity decreases gradually 31,32 . For Au@SiO 2 NPs with constant silica shell thickness, AuNPs with smaller diameter will produce weaker electromagnetic field intensity, so the plasmon coupling in the close-packed NPs decrease.…”

Section: Resultsmentioning

confidence: 91%

Unprecedented efficient electron transport across Au nanoparticles with up to 25-nm insulating SiO2-shells

Jin

2019

Sci Rep

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Quantum tunneling is the basis of molecular electronics, but often its electron transport range is too short to overcome technical defects caused by downscaling of electronic devices, which limits the development of molecular-/nano-electronics. Marrying electronics with plasmonics may well present a revolutionary way to meet this challenge as it can manipulate electron flow with plasmonics at the nanoscale. Here we report on unusually efficient temperature-independent electron transport, with some photoconductivity, across a new type of junction with active plasmonics. The junction is made by assembly of SiO2 shell-insulated Au nanoparticles (Au@SiO2 NPs) into dense nanomembranes of a few Au@SiO2 layers thick and transport is measured across these membranes. We propose that the mechanism is plasmon-enabled transport, possibly tunneling (as it is temperature-independent). Unprecedentedly ultra-long-range transport across one, up to even three layers of Au@SiO2 in the junction, with a cumulative insulating (silica) gap up to 29 nm/NP layer was achieved, well beyond the measurable limit for normal quantum mechanical tunneling across insulators (~2.5 nm at 0.5–1 V). This finding opens up a new interdisciplinary field of exploration in nanoelectronics with wide potential impact on such areas as electronic information transfer.

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Section: Resultsmentioning

confidence: 91%

Unprecedented efficient electron transport across Au nanoparticles with up to 25-nm insulating SiO2-shells

Jin

2019

Sci Rep

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“…This may seem counter‐intuitive, but is not surprising given the unusual optoelectronic properties of the 2D Au@SiO 2 nanomembranes caused by plasmon‐enabled ultralong‐range and wavelike electron transport ability of AuNPs. [ 24,31 ] As confirmed by FDTD simulations in Figure S13 (Supporting Information), under 650 nm laser illumination, the standing wave type LSPR coupling of the Au@SiO 2 nanomembranes intensifies 2D in‐plane E ‐field enhancement of the membrane and makes more electrons trapped into Au cores (confines escape of electrons vertically), which increases energy potential barrier for electron tunneling across the nanomembrane, and hence decreased instead of increased somewhat NDR current. In addition, we further studied the NDR processes of the device under different temperatures (by physical heating only, without illumination).…”

Section: Figurementioning

confidence: 83%

Programmable Organic‐Free Negative Differential Resistance Memristor Based on Plasmonic Tunnel Junction

Jin

2020

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A novel negative differential resistance (NDR) phenomenon is reported herein based on planar plasmonic tunnel junction, resulting from plasmon‐assisted long‐range electron tunneling (P‐tunneling) and electronic caching effect of Au@SiO2 nanoparticles. The tunnel junction is made of shell‐insulated Au@SiO2 nanoparticle nanomembrane, in which SiO2 shells act as a tunable tunneling barrier, while the Au core not only support the plasmonic effect to enable P‐tunneling, but also act as electronic caches to render NDR responses. The NDR peak voltage and current can be programmably controlled by varying the thickness of SiO2 shell and the size of Au core to tune barrier level for electron transport. In addition, light induced plasmonic effect can be further managed to regulate the NDR behavior by fine‐tuning P‐tunneling. The phenomenon is exploited for robust use as memristors. The work provides a new mechanism for the generation of NDR effect and may open a way for the development of robust and new conceptual nanoelectronic devices.

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“…Besides, 2D ordered plasmonic nanostructures or films, with distinct optical features to random distributed NPs, might also be promising catalysts for plasmon‐enhanced photocatalysis and electrocatalysis. [ 193,194 ]…”

Section: Conclusion and Perspectivementioning

confidence: 99%

Recent Advances in Plasmonic Nanostructures for Enhanced Photocatalysis and Electrocatalysis

et al. 2020

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Plasmonic nanomaterials coupled with catalytically active surfaces can provide unique opportunities for various catalysis applications, where surface plasmons produced upon proper light excitation can be adopted to drive and/or facilitate various chemical reactions. A brief introduction to the localized surface plasmon resonance and recent design and fabrication of highly efficient plasmonic nanostructures, including plasmonic metal nanostructures and metal/semiconductor heterostructures is given. Taking advantage of these plasmonic nanostructures, the following highlights summarize recent advances in plasmon‐driven photochemical reactions (coupling reactions, O2 dissociation and oxidation reactions, H2 dissociation and hydrogenation reactions, N2 fixation and NH3 decomposition, and CO2 reduction) and plasmon‐enhanced electrocatalytic reactions (hydrogen evolution reaction, oxygen reduction reaction, oxygen evolution reaction, alcohol oxidation reaction, and CO2 reduction). Theoretical and experimental approaches for understanding the underlying mechanism of surface plasmon are discussed. A proper discussion and perspective of the remaining challenges and future opportunities for plasmonic nanomaterials and plasmon‐related chemistry in the field of energy conversion and storage is given in conclusion.

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Nanoengineered Metasurface Immunosensor with over 1000-Fold Electrochemiluminescence Enhancement for Ultra-sensitive Bioassay

Cited by 32 publications

References 24 publications

Unprecedented efficient electron transport across Au nanoparticles with up to 25-nm insulating SiO2-shells

Unprecedented efficient electron transport across Au nanoparticles with up to 25-nm insulating SiO2-shells

Programmable Organic‐Free Negative Differential Resistance Memristor Based on Plasmonic Tunnel Junction

Recent Advances in Plasmonic Nanostructures for Enhanced Photocatalysis and Electrocatalysis

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