scholarly journals Controllable fabrication of polymeric nanowires by NIL technique and self-assembled AAO template for SERS application

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dongjing Li ◽  
Aixia Wu ◽  
Qing Wan ◽  
Zeping Li
Keyword(s):  
Nanoimprint Lithography ◽  
Low Cost ◽  
Raman Signal ◽  
Aao Template ◽  
Surface Enhanced Raman ◽  
Active Substrate ◽  
Enhanced Raman Scattering ◽  
Vertically Aligned ◽  
Self Assembled ◽  
Controllable Fabrication

AbstractA controllable strategy to fabricate the polymeric nanowires with high throughput and low cost is developed by using the thermal nanoimprint lithography (NIL) technique and self-assembled anodic aluminum oxide (AAO) template. The length of polymeric nanowires can be controlled by adjusting the duration of thermal NIL. A fill mechanism of thermoplastic intermediate polymer stamp (IPS) polymer pressed into the AAO nanopores is closely studied. The as-prepared IPS polymeric nanowire-based Surface-Enhanced Raman Scattering (SERS)-active substrate exhibits a remarkable reproducibility. The effective adsorption of the R6G as probe molecule near to hotspots generated at 3D vertically aligned polymeric nanowire SERS active substrates shows extraordinary enhancement of Raman signal with an enhancement factor (EF) of 105–106. The present strategy is of great guiding significance to broaden the use of thermal NIL technique and AAO template for the fabrication of other nanomaterials, especially for the flexible and transparent polymer-based nanomaterials.

scholarly journals Controllable fabrication of Ag-nanoplate-decorated PAN-nanopillar arrays and their application in surface-enhanced Raman scattering

RSC Advances ◽  
2017 ◽  
Vol 7 (84) ◽  
pp. 53157-53163 ◽  
Author(s):  
Zhongbo Li ◽  
Zhaofang Du ◽  
Kexi Sun ◽  
Xuan He ◽  
Bensong Chen
Keyword(s):  
Hot Spots ◽  
Large Scale ◽  
Low Cost ◽  
Flexible Films ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Vertically Aligned ◽  
Controllable Fabrication ◽  
Nanopillar Arrays

This article demonstrates a controllable and low-cost fabrication approach to large-scale flexible films with one side consisting of ordered and vertically aligned Ag-nanoplates assembled PAN-nanopillar arrays with high-density and uniform hot spots.

Ag dendritic nanostructures for rapid detection of thiram based on surface-enhanced Raman scattering

RSC Advances ◽  
2015 ◽  
Vol 5 (86) ◽  
pp. 70553-70557 ◽  
Author(s):  
Qiang Wang ◽  
Dun Wu ◽  
Zhidong Chen
Keyword(s):  
Rapid Detection ◽  
Agricultural Products ◽  
Raman Signal ◽  
Surface Enhanced ◽  
Dendritic Nanostructures ◽  
Surface Enhanced Raman ◽  
Active Substrate ◽  
Enhanced Raman Scattering ◽  
Sers Active Substrate ◽  
Signal Readout

We have developed a SERS-active substrate based on Ag dendritic nanostructures for sensitive Raman signal readout and fingerprint identification of pesticide residues in agricultural products and environments.

scholarly journals Tunable Silver Nanoparticle Arrays by Hot Embossing and Sputter Deposition for Surface-Enhanced Raman Scattering

2019 ◽  
Vol 9 (8) ◽  
pp. 1636 ◽  
Author(s):  
Chu-Yu Huang ◽  
Ming-Shiuan Tsai
Keyword(s):  
Raman Scattering ◽  
Silver Nanoparticle ◽  
Enhancement Factor ◽  
Low Cost ◽  
Nanoparticle Arrays ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Active Substrate ◽  
Enhanced Raman Scattering ◽  
Sers Active Substrate

Surface-enhanced Raman scattering (SERS) spectroscopy has attracted a lot of attention over the past 30 years. Due to its extreme sensitivity and label-free detection capability, it has shown great potential in areas such as analytical chemistry, biochemistry, and environmental science. However, the major challenge is to manufacture large-scale highly SERS active substrates with high controllability, good reproducibility, and low cost. In this study, we report a novel method to fabricate uniform silver nanoparticle arrays with tunable particle sizes and interparticle gaps. Using hot embossing and sputtering techniques, we were able to batch produce the silver nanoparticle arrays SERS active substrate with consistent quality and low cost. We showed that the proposed SERS active substrate has good uniformity and high reproducibility. Experimental results show that the SERS enhancement factor is affected by silver nanoparticles size and interparticle gaps. Furthermore, the enhancement factor of the SERS signal obtained from Rhodamine 6G (R6G) probe molecules was as high as 1.12 × 107. Therefore, the developed method is very promising for use in many SERS applications.

scholarly journals Sunflower-Like Nanostructure with Built-In Hotspots for Alpha-Fetoprotein Detection

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1197
Author(s):  
Xiaoyu Zhao ◽  
Aonan Zhu ◽  
Yaxin Wang ◽  
Yongjun Zhang ◽  
Xiaolong Zhang
Keyword(s):  
Rapid Detection ◽  
Clinical Medicine ◽  
Electromagnetic Coupling ◽  
Low Cost ◽  
Surface Enhanced Raman Spectroscopy ◽  
Alpha Fetoprotein ◽  
Low Concentrations ◽  
Surface Enhanced Raman ◽  
Active Substrate ◽  
Array Structures

In the present study, a sunflower-like nanostructure array composed of a series of synaptic nanoparticles and nanospheres was manufactured through an efficient and low-cost colloidal lithography technique. The primary electromagnetic field contribution generated by the synaptic nanoparticles of the surface array structures was also determined by a finite-difference time-domain software to simulate the hotspots. This structure exhibited high repeatability and excellent sensitivity; hence, it was used as a surface-enhanced Raman spectroscopy (SERS) active substrate to achieve a rapid detection of ultra-low concentrations of Alpha-fetoprotein (AFP). This study demonstrates the design of a plasmonic structure with strong electromagnetic coupling, which can be used for the rapid detection of AFP concentration in clinical medicine.

scholarly journals A Biomedical Surface Enhanced Raman Scattering Substrate: Functionalized Three-Dimensional Porous Membrane Decorated with Silver Nanoparticles

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Li Yuan ◽  
Jinghuai Fang ◽  
Yonglong Jin ◽  
Chaonan Wang ◽  
Tian Xu
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
Three Dimensional ◽  
Surface Enhanced Raman Scattering ◽  
Porous Membrane ◽  
Raman Signal ◽  
Functional Surface ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

We fabricated a simple, cheap, and functional surface enhanced Raman scattering substrate for biomedical application. Hot spots between two close silver nanoparticles distributed in the skeleton of a three-dimensional porous membrane, especially in the pores, were formed. The dual poles of micropores in the membrane were discussed. The pores could protect the silver nanoparticles in the pores from being oxidized, which makes the membrane effective for a longer period of time. In addition,Staphylococcus aureuscells could be trapped by the micropores and then the Raman signal became stronger, indicating that the functional surface enhanced Raman scattering substrate is reliable.

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