Plasmon-coupled 3D porous hotspot architecture for super-sensitive quantitative SERS sensing of toxic substances on real sample surfaces

2019 ◽  
Vol 21 (35) ◽  
pp. 19288-19297 ◽  
Author(s):  
Maofeng Zhang ◽  
Jian Yang ◽  
Yaru Wang ◽  
Haoran Sun ◽  
Hongyang Zhou ◽  
...  
Keyword(s):  
Real Sample ◽  
Plasmonic Nanostructures ◽  
Toxic Substances ◽  
Sers Detection ◽  
Quantitative Sers ◽  
Sers Sensing

3D porous AgNPs/Cu plasmonic nanostructures allow for fast, sensitive and quantitative SERS detection of toxic residues on real sample surfaces.

Quantitative SERS Detection of Trace Glutathione with Internal Reference Embedded Au-core/Ag-shell Nanoparticles

Nano LIFE ◽  
2016 ◽  
Vol 06 (03n04) ◽  
pp. 1642003 ◽  
Author(s):  
Yan Zhou ◽  
Rui Ding
Keyword(s):  
Reference Method ◽  
High Sensitivity ◽  
Internal Reference ◽  
Shell Nanoparticles ◽  
New Strategy ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Quantitative Sers ◽  
Shell Particles ◽  
Improved Accuracy

Surface-enhanced Raman scattering (SERS) has been widely studied and applied for over three decades. However, reliable SERS detection of molecules with low polarizability is still suffering from poor sensitivity and reproducibility. In this paper, we have reported a new strategy for performing quantitative SERS detection of Raman insensitive Glutathione (GSH), based on GSH-induced replacement of a highly Raman sensitive four-mercaptopyridine (MP) adsorbed on the surface of four-aminothiophenol (ATP) embedded Au-core/Ag-shell particles. This replacement led to a strong decrease of the MP SERS signal, which was used to determine the concentration of GSH. The adoption of GSH-induced Raman probe replacement leads to high sensitivity, while the use of internal reference method provides an improved accuracy of the GSH quantification.

Reliable and quantitative SERS detection of dopamine levels in human blood plasma using a plasmonic Au/Ag nanocluster substrate

Nanoscale ◽  
2018 ◽  
Vol 10 (47) ◽  
pp. 22493-22503 ◽  
Author(s):  
Viet-Duc Phung ◽  
Won-Sik Jung ◽  
Thuy-An Nguyen ◽  
Jong-Hoon Kim ◽  
Sang-Wha Lee
Keyword(s):  
Blood Plasma ◽  
Human Blood ◽  
Human Blood Plasma ◽  
Dopaminergic Dysfunction ◽  
Sers Detection ◽  
Quantitative Sers

Accurate and rapid blood-based detection of dopamine levels can aid in the diagnosis and monitoring of diseases related to dopaminergic dysfunction.

Nanomaterial-based SERS sensing technology for biomedical application

2019 ◽  
Vol 7 (24) ◽  
pp. 3755-3774 ◽  
Author(s):  
Zhicheng Huang ◽  
Amin Zhang ◽  
Qian Zhang ◽  
Daxiang Cui
Keyword(s):  
Biomedical Application ◽  
Experimental Studies ◽  
Exciting Field ◽  
Sensing Technology ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Enhanced Raman Scattering ◽  
And Function ◽  
Sers Sensing

Over the past few years, nanomaterial-based surface-enhanced Raman scattering (SERS) detection has emerged as a new exciting field in which theoretical and experimental studies of the structure and function of nanomaterials have become a focus.

scholarly journals Microporous silica membranes promote plasmonic nanoparticle stability for SERS detection of uranyl

Nanoscale ◽  
2020 ◽  
Vol 12 (46) ◽  
pp. 23700-23708
Author(s):  
Hoa T. Phan ◽  
Shenghao Geng ◽  
Amanda J. Haes
Keyword(s):  
Ionic Strength ◽  
Au Nanoparticles ◽  
Microporous Silica ◽  
Silica Membranes ◽  
Plasmonic Nanoparticle ◽  
Nanoparticle Stability ◽  
Sers Detection ◽  
Sers Sensing

Microporous silica membranes facilitate plasmonic stability of Ag@Au nanoparticles against variations in pH, ionic strength, and temperature for SERS sensing.

scholarly journals Highly Sensitive and Selective Nanogap-Enhanced SERS Sensing Platform

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 619 ◽  
Author(s):  
ChaeWon Mun ◽  
Vo Thi Nhat Linh ◽  
Jung-Dae Kwon ◽  
Ho Sang Jung ◽  
Dong-Ho Kim ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Near Field ◽  
Polymer Surface ◽  
Molecular Size ◽  
Surface Enhanced Raman Spectroscopy ◽  
Localized Surface Plasmon ◽  
Plasmonic Nanostructures ◽  
Sensing Platform ◽  
Highly Sensitive ◽  
Sers Sensing

This paper reports a highly sensitive and selective surface-enhanced Raman spectroscopy (SERS) sensing platform. We used a simple fabrication method to generate plasmonic hotspots through a direct maskless plasma etching of a polymer surface and the surface tension-driven assembly of high aspect ratio Ag/polymer nanopillars. These collapsed plasmonic nanopillars produced an enhanced near-field interaction via coupled localized surface plasmon resonance. The high density of the small nanogaps yielded a high plasmonic detection performance, with an average SERS enhancement factor of 1.5 × 107. More importantly, we demonstrated that the encapsulation of plasmonic nanostructures within nanofiltration membranes allowed the selective filtration of small molecules based on the degree of membrane swelling in organic solvents and molecular size. Nanofiltration membrane-encapsulated SERS substrates do not require pretreatments. Therefore, they provide a simple and fast detection of toxic molecules using portable Raman spectroscopy.

Quantitative SERS detection of low-concentration aromatic polychlorinated biphenyl-77 and 2,4,6-trinitrotoluene

2014 ◽  
Vol 280 ◽  
pp. 706-712 ◽  
Author(s):  
Zhi Yong Bao ◽  
Xin Liu ◽  
Y. Chen ◽  
Yucheng Wu ◽  
Helen L.W. Chan ◽  
...  
Keyword(s):  
Polychlorinated Biphenyl ◽  
Low Concentration ◽  
Sers Detection ◽  
Quantitative Sers

scholarly journals Al/Si Nanopillars as Very Sensitive SERS Substrates

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1534 ◽  
Author(s):  
Giovanni Magno ◽  
Benoit Bélier ◽  
Grégory Barbillon
Keyword(s):  
Native Oxide ◽  
Native Oxide Layer ◽  
Aluminum Layer ◽  
Large Area ◽  
Sers Substrates ◽  
Random Arrangement ◽  
Raman Enhancement ◽  
Sers Detection ◽  
Fdtd Simulations ◽  
Sers Sensing

In this paper, we present a fast fabrication of Al/Si nanopillars for an ultrasensitive SERS detection of chemical molecules. The fabrication process is only composed of two steps: use of a native oxide layer as a physical etch mask followed by evaporation of an aluminum layer. A random arrangement of well-defined Al/Si nanopillars is obtained on a large-area wafer of Si. A good uniformity of SERS signal is achieved on the whole wafer. Finally, we investigated experimentally the sensitivity of these Al/Si nanopillars for SERS sensing, and analytical enhancement factors in the range of 1.5 × 10 7 − 2.5 × 10 7 were found for the detection of thiophenol molecules. Additionally, 3D FDTD simulations were used to better understand optical properties of Al/Si nanopillars as well as the Raman enhancement.

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