Quasi-3D gold nanoring cavity arrays with high-density hot-spots for SERS applications via nanosphere lithography

Nanoscale ◽  
2014 ◽  
Vol 6 (15) ◽  
pp. 8606-8611 ◽  
Author(s):  
Chi-Chih Ho ◽  
Ke Zhao ◽  
Tze-Yang Lee
Keyword(s):  
Hot Spots ◽  
Nanosphere Lithography ◽  
High Density

A simple and robust NSL fabrication for generating nanoring cavity arrays with high density hot spots.

scholarly journals AgNPs decorated 3D bionic silicon nanograss arrays pattern with high-density hot-spots for SERS sensing via green galvanic displacement without additives

RSC Advances ◽  
2021 ◽  
Vol 11 (44) ◽  
pp. 27152-27159
Author(s):  
Li Wang ◽  
Jian Huang ◽  
Mei-Juan Su ◽  
Jin-Di Wu ◽  
Weisheng Liu
Keyword(s):  
Hot Spots ◽  
High Density ◽  
Galvanic Displacement ◽  
Si Substrate ◽  
Plasma Interaction ◽  
Organic Reagents ◽  
Vls Growth ◽  
Sers Sensing

The Si nanograss arrays are directly grown on Si substrate via catalyst-assisted VLS growth and subsequent plasma interaction. AgNPs were rapidly immobilized on Si nanograss arrays for SERS sensing, without any organic reagents and additives.

scholarly journals Optical near-field mapping of plasmonic nanostructures prepared by nanosphere lithography

2018 ◽  
Vol 9 ◽  
pp. 1536-1543 ◽  
Author(s):  
Gitanjali Kolhatkar ◽  
Alexandre Merlen ◽  
Jiawei Zhang ◽  
Chahinez Dab ◽  
Gregory Q Wallace ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Hot Spots ◽  
Near Field ◽  
Nanosphere Lithography ◽  
Plasmonic Nanostructures ◽  
Far Field ◽  
Optical Images ◽  
Spatial Frequencies ◽  
Comparison Of The Results ◽  
Non Destructive

We introduce a simple, fast, efficient and non-destructive method to study the optical near-field properties of plasmonic nanotriangles prepared by nanosphere lithography. Using a rectangular Fourier filter on the blurred signal together with filtering of the lower spatial frequencies to remove the far-field contribution, the pure near-field contributions of the optical images were extracted. We performed measurements using two excitation wavelengths (532.1 nm and 632.8 nm) and two different polarizations. After the processing of the optical images, the distribution of hot spots can be correlated with the topography of the structures, as indicated by the presence of brighter spots at the apexes of the nanostructures. This technique is validated by comparison of the results to numerical simulations, where agreement is obtained, thereby confirming the near-field nature of the images. Our approach does not require any advanced equipment and we suggest that it could be applied to any type of sample, while keeping the measurement times reasonably short.

Binary “island” shaped arrays with high-density hot spots for surface-enhanced Raman scattering substrates

Nanoscale ◽  
2018 ◽  
Vol 10 (29) ◽  
pp. 14220-14229 ◽  
Author(s):  
Weidong Zhao ◽  
Shuyuan Xiao ◽  
Yuxian Zhang ◽  
Dong Pan ◽  
Jiahui Wen ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Hot Spots ◽  
Surface Enhanced Raman Scattering ◽  
High Density ◽  
Self Assembled Monolayer ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Self Assembled

The BISA with high-density hot spots as reproducible SERS substrates by combining an opal structure with self-assembled monolayer AuNPs is demonstrated.

10×-Enhanced Heterogeneous Nanocatalysis on a Nanoporous Gold Disk Array with High-Density Hot Spots

2019 ◽  
Vol 11 (14) ◽  
pp. 13499-13506 ◽  
Author(s):  
Md Masud Parvez Arnob ◽  
Camille Artur ◽  
Ibrahim Misbah ◽  
Syed Mubeen ◽  
Wei-Chuan Shih
Keyword(s):  
Hot Spots ◽  
High Density ◽  
Nanoporous Gold ◽  
Disk Array

scholarly journals Preparation of a Novel SERS Platform Based on Mantis Wing with High-Density and Multi-Level “Hot Spots”

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 672
Author(s):  
Mingli Wang ◽  
Guochao Shi ◽  
Junlin Zhu ◽  
Yanying Zhu ◽  
Xin Sun ◽  
...  
Keyword(s):  
Pesticide Residues ◽  
Hot Spots ◽  
Limit Of Detection ◽  
High Density ◽  
Sers Substrate ◽  
Rapid Sampling ◽  
Relative Standard ◽  
Molecule Recognition ◽  
Multi Level ◽  
Apple Peels

The recent development of SERS substrates based on irregular nanostructures for directly molecule recognition has aroused increasing attention. By combining the irregular flake-like nanostructures of mantis wings, high SERS performance of Ag nanofilms, and the chemical stability of Au nanoparticles (NPs), an ultra-sensitive and flexible SERS substrate based on Au NPs functionalized Ag nanofilms-mantis wings (Au-Ag-M.w.) hybrid system is successfully fabricated. When 4-aminothiophenol is selected as the probe molecule, the limit of detection (LOD) is as low as 10−13 M and the relative standard deviation (RSD) is lower than 7.15%. This novel SERS platform exhibits high SERS performance in terms of sensitivity, reproducibility and practicability mainly because there are high-density and multi-level “hot spots” in the appropriate nanogaps. Meanwhile, it also systematically compares the differences of the SERS performance of Cu and Ag decorated M.w. hybrids and how these differences can alter their response. Moreover, the proposed substrate is employed to rapidly detect the pesticide residues on apple peels and the LOD for cypermethrin is estimated at 10−10 mg/mL. Therefore, this novel SERS substrate has great potential in rapid sampling of pesticide residues on real samples and expands the investigation to other natural materials for fabricating various SERS platforms.

Ordered mesoporous silver superstructures with SERS hot spots

2019 ◽  
Vol 55 (55) ◽  
pp. 7982-7985 ◽  
Author(s):  
Xiaotong Wu ◽  
Xiaokun Fan ◽  
Zhen Yin ◽  
Yanjun Liu ◽  
Jing Zhao ◽  
...  
Keyword(s):  
Hot Spots ◽  
High Density ◽  
Nanoparticle Assembly ◽  
Ordered Mesoporous

Ordered mesoporous silver superstructures have been fabricated via the combination of nanoparticle assembly and thermal induced nanoparticle attachment. These superstructures exhibit high-density LSPR “hot spots” at the ordered mesopore sites.

Monolithic NPG nanoparticles with large surface area, tunable plasmonics, and high-density internal hot-spots

Nanoscale ◽  
2014 ◽  
Vol 6 (14) ◽  
pp. 8199-8207 ◽  
Author(s):  
Fusheng Zhao ◽  
Jianbo Zeng ◽  
Md Masud Parvez Arnob ◽  
Po Sun ◽  
Ji Qi ◽  
...  
Keyword(s):  
Surface Area ◽  
Hot Spots ◽  
High Density ◽  
Large Surface Area ◽  
Plasmonic Nanoparticles

NPG disks as novel plasmonic nanoparticles greatly promote plasmon-matter interactions.

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