Distance mediated electrochemiluminescence enhancement of CdS thin films induced by the plasmon coupling of gold nanoparticle dimers

Li, Meixing; Zhao, Wei; Qian, Guangsheng; Feng, Qiumei; Xu, Jing‐Juan; Chen, Hong‐Yuan

doi:10.1039/c6cc08441a

“…Analogous to the concept of metal‐enhanced fluorescence, in which the plasmon interaction with a fluorophore enhances excitation and radiative relaxation pathways through the electromagnetic field of the plasmon, chemiluminescence and electrochemiluminescence can be enhanced by proximity to a plasmonic substrate. In these cases, the luminophore must be placed at a distance of about 10 nm to experience the greatest enhancement, which is on the order of 3‐ to 6‐fold . At distances shorter than 10 nm, quenching of ECL was observed due to the energy transfer of the excited state of the luminophore to the metal surface.…”

Section: Figurementioning

confidence: 99%

“…At distances shorter than 10 nm, quenching of ECL was observed due to the energy transfer of the excited state of the luminophore to the metal surface. At greater distances, the plasmon enhancement decreases due to lower field enhancement …”

Section: Figurementioning

confidence: 99%

The Fundamentals of Real‐Time Surface Plasmon Resonance/Electrogenerated Chemiluminescence

Dinel

¹

,

Tartaggia

²

,

Wallace

³

et al. 2019

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We report the integration of surface plasmon resonance (SPR), cyclic voltammetry and electrochemiluminescence (ECL) responses to survey the interfacial adsorption and energy transfer processes involved in ECL on a plasmonic substrate. It was observed that a Tween 80/tripropylamine nonionic layer formed on the gold electrode of the SPR sensor, while enhancing the ECL emission process, affects the electron transfer process to the luminophore, Ru(bpy)32+, which in turn has an impact on the plasmon resonance. Concomitantly, the surface plasmon modulated the ECL intensity, which decreased by about 40 %, due to an interaction between the excited state of Ru(bpy)32+ and the plasmon. This occurred only when the plasmon was excited, demonstrating that the optically excited surface plasmon leads to lower plasmon‐mediated luminescence and that the plasmon interacts with the excited state of Ru(bpy)32+ within a very thin layer.

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“…This special characteristic allows enhancing the spatial resolution of LSPR configurations by designing the geometry and composition of metallic nanostructures, laying the basis for colorimetric plasmonic biosensing [ 27 , 28 ]. The local electromagnetic field can enhance optical processes such as Raman scattering and fluorescence, leading to SERS and plasmon-enhanced electrochemiluminescence (ECL) sensing schemes [ 29 , 30 , 31 ]. The sensitivity achieved by both optical configurations is higher than that of SPR and LSPR, thus ensuring the detection of single virus particles.…”

Section: Biosensing Strategiesmentioning

confidence: 99%

“…The effect of collective oscillations of free electrons on the surface of metal nanostructures displayed in LSPR sensing can enhance the optical signal of a luminophore near noble metal nanoparticles [ 31 , 73 ]. Plasmonic-enhanced electrochemiluminescence can be explained by the increase of excitation and emission, resulting from the enhancement of the electromagnetic field of incident light [ 31 ]. The distance between plasmonic nanoparticles and the luminophore determines the electrochemiluminescence process since the signal could be quenched when plasmonic nanoparticles working as energy or electron acceptors are very close to the luminophore.…”

Section: Other Plasmonic Nanomaterial-based Strategiesmentioning

confidence: 99%

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Recent Progress in Plasmonic Biosensing Schemes for Virus Detection

Mauriz

¹

2020

Sensors

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The global burden of coronavirus disease 2019 (COVID-19) to public health and global economy has stressed the need for rapid and simple diagnostic methods. From this perspective, plasmonic-based biosensing can manage the threat of infectious diseases by providing timely virus monitoring. In recent years, many plasmonics’ platforms have embraced the challenge of offering on-site strategies to complement traditional diagnostic methods relying on the polymerase chain reaction (PCR) and enzyme-linked immunosorbent assays (ELISA). This review compiled recent progress on the development of novel plasmonic sensing schemes for the effective control of virus-related diseases. A special focus was set on the utilization of plasmonic nanostructures in combination with other detection formats involving colorimetric, fluorescence, luminescence, or Raman scattering enhancement. The quantification of different viruses (e.g., hepatitis virus, influenza virus, norovirus, dengue virus, Ebola virus, Zika virus) with particular attention to Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) was reviewed from the perspective of the biomarker and the biological receptor immobilized on the sensor chip. Technological limitations including selectivity, stability, and monitoring in biological matrices were also reviewed for different plasmonic-sensing approaches.

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The Fundamentals of Real‐Time Surface Plasmon Resonance/Electrogenerated Chemiluminescence

Dinel

¹

,

Tartaggia

²

,

Wallace

³

et al. 2019

View full text Add to dashboard Cite

We report the integration of surface plasmon resonance (SPR), cyclic voltammetry and electrochemiluminescence (ECL) responses to survey the interfacial adsorption and energy transfer processes involved in ECL on aplasmonic substrate.I tw as observed that aT ween 80/tripropylamine nonionic layer formed on the gold electrode of the SPR sensor, while enhancing the ECL emission process,affects the electron transfer process to the luminophore,Ru(bpy) 3 2+ ,which in turn has an impact on the plasmon resonance.C oncomitantly,t he surface plasmon modulated the ECL intensity,w hich decreased by about 40 %, due to an interaction between the excited state of Ru(bpy) 3 2+ and the plasmon. This occurred only when the plasmon was excited, demonstrating that the optically excited surface plasmon leads to lower plasmonmediated luminescence and that the plasmon interacts with the excited state of Ru(bpy) 3 2+ within av ery thin layer.Surface plasmon resonance (SPR) [1] and electrogenerated chemiluminescence (ECL) [2] are increasingly employed for clinical analysis.B oth techniques rely on the concepts of biosensors,i nw hich capture molecules situated near the surface of the SPR chip or near the electrode in the case of ECL provides selectivity to the sensor.Hence,itwas revealed that SPR and ECL are complementary and offer similar performances for the detection of antibodies. [3] SPR sensors provide quantitative real-time information on the adsorption of molecules to as urface,a lthough the analysis of clinical samples in biofluids may be difficult. [4] ECL provides high sensitivity,h igh selectivity,a nd low detection limits even in crude matrices as it is relatively insensitive to nonspecific adsorption of biofluids,b ut lacks information on the adsorption processes occurring on the electrode.H ence,t he combination of SPR and ECL in as ingle instrument would be beneficial to monitor interfacial processes involved in ECL and to design biosensors with improved performances. To fully benefit from the combination of the techniques, at horough understanding of the underlying principles is needed. As they are both based on the electromagnetic properties of materials,s urface plasmons and luminophores can couple and give rise to enhanced chemiluminescence properties. [5] Analogous to the concept of metal-enhanced fluorescence, [6] in which the plasmon interaction with af luorophore enhances excitation and radiative relaxation pathways through the electromagnetic field of the plasmon, chemiluminescence [7] and electrochemiluminescence [8] can be enhanced by proximity to ap lasmonic substrate.I nt hese cases,the luminophore must be placed at adistance of about 10 nm to experience the greatest enhancement, which is on the order of 3-to 6-fold. [6c, 8, 9] At distances shorter than 10 nm, quenching of ECL was observed due to the energy transfer of the excited state of the luminophore to the metal surface.At greater distances,the plasmon enhancement decreases due to lower field enhancement. [6c, 8] In recent years,t he distance-depend...

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Distance mediated electrochemiluminescence enhancement of CdS thin films induced by the plasmon coupling of gold nanoparticle dimers

Abstract: Gold nanoparticle dimers assembled on the surface of CdS QD thin films served as nano-antennas to mediate the distance-dependent plasmon enhanced electrochemiluminescence of QDs.

Cited by 56 publications

References 25 publications

The Fundamentals of Real‐Time Surface Plasmon Resonance/Electrogenerated Chemiluminescence

The Fundamentals of Real‐Time Surface Plasmon Resonance/Electrogenerated Chemiluminescence

Recent Progress in Plasmonic Biosensing Schemes for Virus Detection

The Fundamentals of Real‐Time Surface Plasmon Resonance/Electrogenerated Chemiluminescence

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