Plasmonic Nanoarchitectures for Single‐Molecule Explorations: An Overview

Koya, Alemayehu Nana

doi:10.1002/adpr.202100325

Cited by 11 publications

(5 citation statements)

References 105 publications

(138 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Optical nanopores [ 96 ] can benefit from the high bandwidth of optical measurements, as well as the ease of monitoring optical signals at high throughput [ 22 , 96 , 97 , 98 , 99 , 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 , 146 , 147 , 148 ]. On the other hand, nanopore techniques can actively deliver target molecules into the optical sensing area instead of relying on diffusion or tethering [ 95 , 105 , 110 , 112 , 149 ].…”

Section: Localized Nanopore Fabrication By Cbdmentioning

confidence: 99%

“…In recent years, combining nanopore sensing with fluorescence and plasmonic optical measurements has drawn more and more interest, because optical signals provide additional depth of information without interfering with the electrical signal [ 22 , 96 , 97 , 98 , 99 , 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 ]. In addition, the research field of plasmonic optical sensing, or fluorescence-based single-molecule sensing, could benefit from the electrical signal of nanopore sensing.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Localized Nanopore Fabrication via Controlled Breakdown

Ying

et al. 2022

Nanomaterials

View full text Add to dashboard Cite

Nanopore sensors provide a unique platform to detect individual nucleic acids, proteins, and other biomolecules without the need for fluorescent labeling or chemical modifications. Solid-state nanopores offer the potential to integrate nanopore sensing with other technologies such as field-effect transistors (FETs), optics, plasmonics, and microfluidics, thereby attracting attention to the development of commercial instruments for diagnostics and healthcare applications. Stable nanopores with ideal dimensions are particularly critical for nanopore sensors to be integrated into other sensing devices and provide a high signal-to-noise ratio. Nanopore fabrication, although having benefited largely from the development of sophisticated nanofabrication techniques, remains a challenge in terms of cost, time consumption and accessibility. One of the latest developed methods—controlled breakdown (CBD)—has made the nanopore technique broadly accessible, boosting the use of nanopore sensing in both fundamental research and biomedical applications. Many works have been developed to improve the efficiency and robustness of pore formation by CBD. However, nanopores formed by traditional CBD are randomly positioned in the membrane. To expand nanopore sensing to a wider biomedical application, controlling the localization of nanopores formed by CBD is essential. This article reviews the recent strategies to control the location of nanopores formed by CBD. We discuss the fundamental mechanism and the efforts of different approaches to confine the region of nanopore formation.

show abstract

Section: Localized Nanopore Fabrication By Cbdmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Localized Nanopore Fabrication via Controlled Breakdown

Ying

et al. 2022

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…from 10 5 to 10 10 ). [ 5 ] Hence, several SERS substrates incorporating this class of hot spots have been proposed, including nanoparticles aggregates/junctions, sharp edges, sharp nanoroughness, and nanoparticle gaps and crevices, [ 6 ] where rationally designed nanogaps have been reported to be highly reproducible, [ 7 ] but hot spots should be carefully designed according to the size of the target molecule. [ 8 , 9 , 10 , 11 , 12 ] In practice, single molecule SERS is generally carried out with limits of detection from the nanomolar to the picomolar range.…”

Section: Introductionmentioning

confidence: 99%

Flexible 3D Plasmonic Web Enables Remote Surface Enhanced Raman Spectroscopy

Rodríguez‐Sevilla,

Álvarez‐Martínez,

Castro‐Beltrán

et al. 2024

Advanced Science

View full text Add to dashboard Cite

Nanoplasmonic materials concentrate light in specific regions of dramatic electromagnetic enhancement: hot spots. Such regions can be employed to perform single molecule detection via surface‐enhanced Raman spectroscopy. However, this phenomenon is challenging since hot spots are expected to be highly intense/abundant and positioning of molecules within such hot spots is crucial to manage with ultrasensitive SERS. Herein, it is discovered that a 3D plasmonic web embedded within a biohybrid (3D‐POWER) exhibits plasmonic transmission, spontaneously absorbs the analyte, and meets these so much needed criteria in ultrasensitive SERS. 3D‐POWER is built with nanopaper and self‐assembled layers of graphene oxide and gold nanorods. According to in silico experiments, 3D‐POWER captures light in a small region and performs plasmonic field transmission in a surrounding volume, thereby activating a plasmonic web throughout the simulated volume. The study also provides experimental evidence supporting the plasmonic field transport ability of 3D power, which operates as a SERS signal carrier (even beyond the apparatus field of view), and the ultrasensitive behavior of this ecofriendly and flexible material facilitating yoctomolar limit of detection. Besides, 3D‐POWER is proven useful in food and biofluids analysis. It is foreseen that 3D‐POWER can be employed as a valuable platform in (bio)analytical applications.

show abstract

“…Coupling metallic nanoparticles with small interparticle separation results in interaction of elementary plasmons of the constituent nanoparticles and thus gives rise to a hybridized DOI: 10.1002/adsr.202300066 plasmon response. [1,2] Compared to the single nanoparticle plasmon, the hybrid plasmonic mode has enhanced near-field intensity and tunable far-field responses with multiple resonances, [3,4] implying its potentials for various plasmon-based applications including single-molecule spectroscopy, [5,6] sensing, [7] and optical trapping. [8] As a result, research on coupled plasmonic modes has grown exponentially with novel reports on various exotic modes of hybrid plasmons including bonding and antibonding dimer plasmons, [9] charge transfer plasmons (CTPs), [10] gap plasmons, [11] Fano resonances (FRs), [12] and lattice plasmons.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Plasmonic Modes for Enhanced Refractive Index Sensing

Dana

Boyu

Lin

et al. 2023

Advanced Sensor Research

Self Cite

View full text Add to dashboard Cite

Compared to single nanoparticles, strongly coupled plasmonic nanoparticles provide attractive advantages owing to their ability to exhibit multiple resonances with unique spectral features and higher local field intensity. These enhanced plasmonic properties of coupled metal nanoparticles have been used for various applications including realization of strong light‐matter interaction, photocatalysis, and sensing. In this article, the basic physics of hybrid plasmonic modes in coupled metallic nanodimers is reviewed and their potentials for refractive index sensing are assessed. In particular, the spectral line shapes of various modes of hybrid plasmons including bonding and antibonding modes in symmetric nanodimers, Fano resonances in asymmetric nanodimers, charge transfer plasmons in linked nanoparticle dimers, hybrid plasmon modes in nanoshells, gap modes in particle‐on‐mirror configurations, and hybrid magnetoplasmonic modes in heterodimers are overviewed. Beyond the dimeric nanosystems, the potentials of surface lattice resonances in periodic nanoparticle arrays for sensing applications are also showcased. Finally, based on the critical assessment of the recent research on coupled plasmonic modes, the outlook on the future prospects of hybrid plasmon‐based refractometric sensing are discussed. Given their tunable resonances and ultranarrow spectral features, coupled metal nanoparticles are expected to play key roles in developing precise plasmonic nanodevices with extreme sensitivity.

show abstract

Plasmonic Nanoarchitectures for Single‐Molecule Explorations: An Overview

Cited by 11 publications

References 105 publications

Localized Nanopore Fabrication via Controlled Breakdown

Localized Nanopore Fabrication via Controlled Breakdown

Flexible 3D Plasmonic Web Enables Remote Surface Enhanced Raman Spectroscopy

Hybrid Plasmonic Modes for Enhanced Refractive Index Sensing

Contact Info

Product

Resources

About