Tunable 3D Plasmonic Cavity Nanosensors for Surface-Enhanced Raman Spectroscopy with Sub-femtomolar Limit of Detection

Tabatabaei, Mohammadali; Najiminaini, Mohamadreza; Davieau, Kieffer; Kaminska, Bożena; Singh, Mahi R.; Carson, Jeffrey J. L.; Lagugné‐Labarthet, François

doi:10.1021/acsphotonics.5b00104

Cited by 83 publications

(59 citation statements)

References 49 publications

(105 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1][2][3][4][5] Raman enhancement is engineered by tuning SERS substrate design parameters such as elemental composition; the size and shape of nanoscale elements; close-range interparticle spacing responsible for hot spots; and patterning of solid substrates that can include ordered and random hierarchies across short, long, and multiple length scales. 1,3,[6][7][8][9][10] Physical structure of the SERSactive metal layer-either its inherent structure or the structure imposed upon it by an underlying support layer-is a critical and performance-determining factor. Considerable effort has been devoted to crafting a host of solid-supported SERS substrates, with results that inspire further efforts to improve and expand fabrication options, sensing capabilities, and sensing performance.…”

mentioning

confidence: 99%

“…Considerable effort has been devoted to crafting a host of solid-supported SERS substrates, with results that inspire further efforts to improve and expand fabrication options, sensing capabilities, and sensing performance. 1,3,[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] Top-down nanofabrication using conventional and unorthodox approaches can produce exquisitely structured substrates, but can require substantial practitioner expertise along with expensive, specialized, and complicated instrumentation, and can moreover substantially limit the palette of fabrication materials. SERS substrates developed outside the material and processing constraints of conventional micro-and nanofabrication have been compelling.…”

mentioning

confidence: 99%

See 1 more Smart Citation

General Strategy To Make an On-Demand Library of Structurally and Functionally Diverse SERS Substrates

Karawdeniya

Bandara

Whelan

et al. 2018

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Surface enhanced Raman spectroscopy; SERS; electroless plating; metallization.ABSTRACT Surface-enhanced Raman spectroscopy (SERS) is a powerful technique for sensing molecules proximal to suitable coinage metal surfaces. The physical structure of the SERS-active metal layer and its support is a key design parameter inspiring considerable, and frequently specialized, efforts in substrate fabrication. The necessary gold film structure can arise from both the metallization process and the underlying support structure, and the structure of the support can deliver additional functions including analytical capabilities such as physical filtering. We used electroless plating as a general approach to create a library of SERS substrates: SERSactive gold films on a range of supports made from a variety of materials, made with a mixture of simple and complex fabrication histories, and offering a selection of structurally-derived functions. The result was that supports with existing functions had their capabilities enhanced by the addition of SERS sensing. Electroless plating thus offers a host of beneficial characteristics 3 for nanofabricating multifunctional SERS substrates, including: tolerance to substrate composition and form factor; low equipment overhead requirements; process chemistry flexibility-including compatibility with conventional top-down nanofabrication; and a lengthy history of commercial application as a simple metallization technique. We gold-plated standard nanofabrication-compatible silicon nitride support surfaces with planar and porous architectures, and with native and polymer-grafted surface chemistries. We used the same plating chemistry to form SERS-active gold films on cellulose fibers arrayed in commercial filter paper and formed into nanocellulose paper. In a functional sense, we used electroless plating to augment nanoporous filters, chromatography platforms, and nanofabrication building blocks with SERS capability.

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

General Strategy To Make an On-Demand Library of Structurally and Functionally Diverse SERS Substrates

Karawdeniya

Bandara

Whelan

et al. 2018

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…It has been demonstrated that in 2D arrays with dimensions close to wavelength, diffraction occurs and yields modes that can be assigned to the lattice periodicity along the X ‐ and Y ‐directions . In our system, the periodic nanohole arrays on gold film result in momentum matching between the in‐plane wave vectors of the incident light and the surface plasmon,

\overset{true\to}{k_{sp}} = (ω / c) \sin θ \pm m \overset{true\to}{u_{x}} \pm n \overset{true\to}{u_{y}}

, where ω is the frequency of the incident light, c is the speed of the light, θ is the incident angle of light, m and n are integers expressing the scattering mode indices,

| \overset{true\to}{u_{x}} | = | \overset{true\to}{u_{y}} | = (4 π / (\sqrt{3} a))

are the reciprocal lattice wave vectors along x ‐direction and y ‐direction, and a is the period of nanohole arrays.…”

Section: Resultsmentioning

confidence: 89%

Large‐Area Fabrication of Highly Tunable Hybrid Plasmonic–Photonic Structures Based on Colloidal Lithography and a Photoreconfigurable Polymer

Wang

Dong

Sun

et al. 2019

Advanced Optical Materials

View full text Add to dashboard Cite

In this work, based on colloidal lithography, a strategy is developed to produce a new type of hybrid plasmonic–photonic system comprising a periodic array of nanoholes in a photoreconfigurable polymer layer deposited on a gold surface. By controlling the experimental conditions, the geometric parameters of the nanoholes can be easily adjusted; hence, the optical properties of the systems are widely tunable. Importantly, the shape and topology of the round nanohole arrays can be easily reconfigured with proper photoirradiation, providing a means to modulate the optical properties and produce new functionalities, as exemplified by the formation of arrays with anisotropic or gradient structural features. Moreover, rubbing dielectric spheres into the formed nanoholes can further tune the topological structures of the dielectric components in the hybrid system, leading to a dramatic modification of the spatial energy distributions and inducing the formation of uniform electromagnetic fields confined near the embedded sphere surfaces, which are more beneficial for practical applications. All the results indicate that the combined use of the unique properties of both a photoreconfigurable polymer and colloidal lithography opens a new avenue with great potential for efficient and large‐area fabrication of hybrid plasmonic–photonic systems with a high degree of optical tunability.

show abstract

“…Many kinds of new methods have been proposed for surface nanopatterning . A variety of nanopatterns such as nanorod array, nanohole array, nanopyramid array, nanoflower array, and nanostar array have been fabricated as SERS substrates by lithography techniques (e.g., ion‐beam lithography, nanoimprint lithography, and nanosphere lithography (NSL)). Among them, NSL is a prominent method as it is able to cost‐efficiently fabricate ultrasensitive SERS substrates with high density of hot spots .…”

Section: Assignment Of Bands In Sers Spectra Of Aβ Oligomers N = Strmentioning

confidence: 99%

Lotus Seedpod Inspired SERS Substrates: A Novel Platform Consisting of 3D Sub‐10 nm Annular Hot Spots for Ultrasensitive SERS Detection

Jin

et al. 2018

Advanced Optical Materials

View full text Add to dashboard Cite

A novel lotus seedpod (LSP) like array substrate with tailorable annular nanogaps is reported for surface‐enhanced Raman spectroscopy (SERS). High SERS activity with excellent Raman signal reproducibility is achieved for molecular detection. Finite‐different time‐domain simulation suggests that sub‐10 nm annular nanogaps formed in the LSP array contribute significantly to the electromagnetic field enhancement for SERS measurements. The SERS substrate presents a detection limit as low as 10−12m along with a relative standard deviation as small as 4.1−8.0% in the detection of rhodamine 6G (R6G). Moreover, the linear correlation between Raman intensity and the concentration of R6G indicates the capability of the substrate for quantitative SERS analyses. As a typical example, the SERS substrate is successfully applied to detecting the α‐helical structure of amyloid‐β oligomers at a low concentration of 0.1 × 10−6m, which will be promising for label‐free detection of Alzheimer's disease in its earliest, presymptomatic, and most treatable stages. The as‐fabricated LSP array substrates therefore hold exciting potentials toward SERS‐based chemical and biomedical detections.

show abstract

Tunable 3D Plasmonic Cavity Nanosensors for Surface-Enhanced Raman Spectroscopy with Sub-femtomolar Limit of Detection

Cited by 83 publications

References 49 publications

General Strategy To Make an On-Demand Library of Structurally and Functionally Diverse SERS Substrates

General Strategy To Make an On-Demand Library of Structurally and Functionally Diverse SERS Substrates

Large‐Area Fabrication of Highly Tunable Hybrid Plasmonic–Photonic Structures Based on Colloidal Lithography and a Photoreconfigurable Polymer

Lotus Seedpod Inspired SERS Substrates: A Novel Platform Consisting of 3D Sub‐10 nm Annular Hot Spots for Ultrasensitive SERS Detection

Contact Info

Product

Resources

About