Design of Polarization Independent SERS Substrate with Raman Gain Evaluated Using Purcell Factor

Goel, Richa; Awasthi, Vimarsh; Rai, Padmnabh; Dubey, Swapnil

doi:10.1007/s11468-021-01410-z

Cited by 10 publications

(10 citation statements)

References 37 publications

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“…Therefore, developing a highly sensitive and reliable SERS substrate for quantitative analysis of a sample analyte is highly demanding. 49 The reported SERS substrates can be roughly divided into four subcategories: (a) plasmonic metal nanostructures, (b) inorganic semiconductors, (c) organic semiconductors, and (d) hybrid substrates with their own advantages and limitations as listed in Table 2. Plasmonic Metal Nanoparticles.…”

Section: ■ Sers and Its Working Mechanismmentioning

confidence: 99%

“…The main issues of using nanomaterials are the size, density, and random distribution of hot spots on the substrate, which can determine the performance of the SERS substrate as well as the reproducibility of the signals. Therefore, developing a highly sensitive and reliable SERS substrate for quantitative analysis of a sample analyte is highly demanding . The reported SERS substrates can be roughly divided into four subcategories: (a) plasmonic metal nanostructures, (b) inorganic semiconductors, (c) organic semiconductors, and (d) hybrid substrates with their own advantages and limitations as listed in Table .…”

Section: Sers and Its Working Mechanismmentioning

confidence: 99%

See 1 more Smart Citation

Surface-Enhanced Raman Spectroscopy Substrates for Food Safety and Quality Analysis

Nilghaz

Mousavi

Amiri

et al. 2022

J. Agric. Food Chem.

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Surface-enhanced Raman spectroscopy (SERS) has been identified as a fundamental surface-sensitive technique that boosts Raman scattering by adsorbing target molecules on specific surfaces. The application of SERS highly relies on the development of smart SERS substrates, and thus the fabrication of SERS substrates has been constantly improved. Herein, we investigate the impacts of different substrates on SERS technology including plasmonic metal nanoparticles, semiconductors, and hybrid systems in quantitative food safety and quality analysis. We first discuss the fundamentals, substrate designs, and applications of SERS. We then provide a critical review of the recent progress of SERS in its usage for screening and detecting chemical and biological contaminants including fungicides, herbicides, insecticides, hazardous colorants, and biohazards in food samples to assess the analytical capabilities of this technology. Finally, we investigate the future trends and provide practical techniques that could be used to fulfill the requirements for rapid analysis of food at a low cost.

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Section: ■ Sers and Its Working Mechanismmentioning

confidence: 99%

Section: Sers and Its Working Mechanismmentioning

confidence: 99%

Surface-Enhanced Raman Spectroscopy Substrates for Food Safety and Quality Analysis

Nilghaz

Mousavi

Amiri

et al. 2022

J. Agric. Food Chem.

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“…Thanks to the real-time and ultrasensitive detection of molecules in trace amounts, 1 , 2 surface-enhanced Raman scattering (SERS) as an up-and-coming technique has been commonly used in various applications, including biosensors, 3 − 5 medicine technology, 6 , 7 plasmon-driven catalytic reactions, 8 − 16 etc. To realize these applications, as a suitable SERS substrate, there should be high-density hotspots that result from strongly enhanced electromagnetic fields caused by the localized surface plasmon resonance (LSPR).…”

Section: Introductionmentioning

confidence: 99%

“…Thanks to the real-time and ultrasensitive detection of molecules in trace amounts, , surface-enhanced Raman scattering (SERS) as an up-and-coming technique has been commonly used in various applications, including biosensors, − medicine technology, , plasmon-driven catalytic reactions, − etc. To realize these applications, as a suitable SERS substrate, there should be high-density hotspots that result from strongly enhanced electromagnetic fields caused by the localized surface plasmon resonance (LSPR). − Various types of SERS substrates have been fabricated by controllable fabrication methods to form effective hotspots, such as arrayed nanopore silver (Ag) thin films, Ag-coated polymeric nanopillar arrays, Ag nanoparticles assembled on a multilayer gold film by employing alumina as a spacer, RGO@MoS 2 @Ag ternary nanocomposites for recyclable SERS detection, hydrophilic–hydrophobic Ag-modified PMMA substrates, a sandwiched Ag cap nanoparticles/SiO 2 /silver film system that can significantly enhance local electric-field intensity and increase the density of electromagnetic hot spots, leading to a SERS enhancement factor of 2.38 × 10 9 , and nanosculptured thin films of silver that perform a fast, accurate, and stable detection performance .…”

Section: Introductionmentioning

confidence: 99%

Silver Nanopillar Arrayed Thin Films with Highly Surface-Enhanced Raman Scattering for Ultrasensitive Detection

et al. 2022

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Surface-enhanced Raman scattering (SERS) technique based on surface plasmon resonance has been considerably investigated in recent years due to its superior sensitivity in the detection of organic or biological molecules at trace levels. However, most research usually focuses on artificial architectures as SERS substrates that always have a complex and expensive micro-nanofabrication process. The high cost of masks for SERS substrates becomes a key obstacle for the widespread commercialization of SERS technology. In this paper, a biomimetic SERS substrate composed of silver-coated nanopillar arrays on the top of a cicada wing was advanced to overcome these challenges as both substrates and masks. Benefiting from the high near-field plasmon resonance coupling at the limited space among neighboring nanopillars, a dramatically increased SERS signal can be achieved using rhodamine 6G (R6G) as a model molecule. Encouragingly, the analytical enhancement factor of the order of more than 10 8 has been conveniently realized with a reliable detection concentration of R6G of about 100 pM or less. This work provides a promising route for designing cost-effective and highly sensitive SERS substrates and the related mask fabrication using our previously proposed template transfer nanoimprint.

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“…In SERS technique, which is a more promising choice for COVID-19 detection than the time-consuming PCR, the significant challenge is to understand the interplay between the structure of the nanoparticle and its optical response [ 11 ]. SERS characteristics depend on the formation of hot spots, which are strong electric field (EF) confinement, occurring in the gap between the two individual nanospheres, direction of polarization and the strength of the EF [ 12 , 13 ]. The features of a highly sensitive and rapidly analyzing SERS substrate should produce an enhancement factor greater than 10 5 , it should be stable under the effect of oxidation and should not be degraded under ambient environment conditions [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

FDTD Study on Evolution of Trimer Silver@Silica Nanospheres to Dimer for SERS Characteristics

Nagarajan

Panchanathan

Chelliah³

et al. 2021

Plasmonics

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Light enhancement occurs strongly within the plasmonic clusters by interaction with surface plasmons. Surface-enhanced Raman spectroscopic (SERS) characteristics of a series of silver@silica trimer core–shell (CS) nanosphere (NS) clusters are investigated in this paper. It is significant to understand the electric field (EF) enhancement mechanism behind the SERS technique. The effect of symmetry breaking is studied for the series starting from the highly symmetric trimer cluster and transformed to linear dimer geometry which progresses through the gradual reduction in the vertex NS. The optical activity such as the evolution of LSPR peak is discussed, the formation of hot spots is demonstrated and the strength of the local EF enhancement is calculated and correlated with the plasmon dipolar modes by using plasmon hybridization theory to understand the underlying physical concepts.

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Design of Polarization Independent SERS Substrate with Raman Gain Evaluated Using Purcell Factor

Cited by 10 publications

References 37 publications

Surface-Enhanced Raman Spectroscopy Substrates for Food Safety and Quality Analysis

Surface-Enhanced Raman Spectroscopy Substrates for Food Safety and Quality Analysis

Silver Nanopillar Arrayed Thin Films with Highly Surface-Enhanced Raman Scattering for Ultrasensitive Detection

FDTD Study on Evolution of Trimer Silver@Silica Nanospheres to Dimer for SERS Characteristics

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