scholarly journals Tailoring gold and silver colloidal bimetallic nanoalloys towards SERS detection of rhodamine 6G

RSC Advances ◽  
2017 ◽  
Vol 7 (26) ◽  
pp. 15944-15951 ◽  
Author(s):  
A. V. Girão ◽  
P. C. Pinheiro ◽  
M. Ferro ◽  
T. Trindade
Keyword(s):  
Rhodamine 6G ◽  
Bimetallic Alloys ◽  
Gold Silver ◽  
Sers Detection ◽  
Sers Sensing

Nanoparticles of gold, silver and their bimetallic alloys were tailored for SERS sensing towards trace amounts of rhodamine 6G.

Ultrafast laser micro-nano structured superhydrophobic teflon surfaces for enhanced SERS detection via evaporation concentration

2020 ◽  
Vol 9 (1-2) ◽  
pp. 89-100 ◽  
Author(s):  
Xinyu Hu ◽  
Rui Pan ◽  
Mingyong Cai ◽  
Weijian Liu ◽  
Xiao Luo ◽  
...  
Keyword(s):  
Rhodamine 6G ◽  
Optimal Parameter ◽  
Solute Concentration ◽  
Processing Parameter ◽  
Detection Techniques ◽  
Peak Intensity ◽  
Target Analytes ◽  
Sers Detection ◽  
Scanning Path ◽  
Evaporation Concentration

AbstractEvaporation concentration of target analytes dissolved in a water droplet based on superhydrophobic surfaces could be able to break the limits for sensitive trace substance detection techniques (e.g. SERS) and it is promising in the fields such as food safety, eco-pollution, and bioscience. In the present study, polytetrafluoroethylene (PTFE) surfaces were processed by femtosecond laser and the corresponding processing parameter combinations were optimised to obtain surfaces with excellent superhydrophobicity. The optimal parameter combination is: laser power: 6.4 W; scanning spacing: 40 μm; scanning number: 1; and scanning path: 90 degree. For trapping and localising droplets, a tiny square area in the middle of the surface remained unprocessed for each sample. The evaporation and concentration processes of droplets on the optimised surfaces were performed and analyzed, respectively. It is shown that the droplets with targeted solute can successfully collect all solute into the designed trapping areas during evaporation process on our laser fabricated superhydrophobic surface, resulting in detection domains with high solute concentration for SERS characterisation. It is shown that the detected peak intensity of rhodamine 6G with a concentration of 10−6m in SERS characterisation can be obviously enhanced by one or two orders of magnitude on the laser fabricated surfaces compared with that of the unprocessed blank samples.

scholarly journals SERS Sensing Properties of New Graphene/Gold Nanocomposite

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1236 ◽  
Author(s):  
Giulia Neri ◽  
Enza Fazio ◽  
Placido Giuseppe Mineo ◽  
Angela Scala ◽  
Anna Piperno
Keyword(s):  
Rhodamine 6G ◽  
Surface Enhanced Raman Spectroscopy ◽  
Molecular Probes ◽  
Au Nps ◽  
Nitrogen Doped ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Sers Sensing

The development of graphene (G) substrates without damage on the sp2 network allows to tune the interactions with plasmonic noble metal surfaces to finally enhance surface enhanced Raman spectroscopy (SERS) effect. Here, we describe a new graphene/gold nanocomposite obtained by loading gold nanoparticles (Au NPs), produced by pulsed laser ablation in liquids (PLAL), on a new nitrogen-doped graphene platform (G-NH2). The graphene platform was synthesized by direct delamination and chemical functionalization of graphite flakes with 4-methyl-2-p-nitrophenyl oxazolone, followed by reduction of p-nitrophenyl groups. Finally, the G-NH2/Au SERS platform was prepared by using the conventional aerography spraying technique. SERS properties of G-NH2/Au were tested using Rhodamine 6G (Rh6G) and Dopamine (DA) as molecular probes. Raman features of Rh6G and DA are still detectable for concentration values down to 1 × 10−5 M and 1 × 10−6 M respectively.

scholarly journals Microspectroscopic SERS detection of interleukin-6 with rationally designed gold/silver nanoshells

The Analyst ◽  
2013 ◽  
Vol 138 (6) ◽  
pp. 1764 ◽  
Author(s):  
Yuling Wang ◽  
Mohammad Salehi ◽  
Max Schütz ◽  
Katharina Rudi ◽  
Sebastian Schlücker
Keyword(s):  
Interleukin 6 ◽  
Gold Silver ◽  
Sers Detection ◽  
Silver Nanoshells

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.

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.

scholarly journals Glucose Detection of 4-Mercaptophenylboronic Acid-Immobilized Gold-Silver Core-Shell Assembled Silica Nanostructure by Surface Enhanced Raman Scattering

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 948
Author(s):  
Xuan-Hung Pham ◽  
Bomi Seong ◽  
Eunil Hahm ◽  
Kim-Hung Huynh ◽  
Yoon-Hee Kim ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Calibration Curve ◽  
Core Shell ◽  
Glucose Detection ◽  
Gold Silver ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Enhanced Raman Scattering ◽  
Silver Core

The importance of glucose in many biological processes continues to garner increasing research interest in the design and development of efficient biotechnology for the sensitive and selective monitoring of glucose. Here we report on a surface-enhanced Raman scattering (SERS) detection of 4-mercaptophenyl boronic acid (4-MPBA)-immobilized gold-silver core-shell assembled silica nanostructure (SiO2@Au@Ag@4-MPBA) for quantitative, selective detection of glucose in physiologically relevant concentration. This work confirmed that 4-MPBA converted to 4-mercaptophenol (4-MPhOH) in the presence of H2O2. In addition, a calibration curve for H2O2 detection of 0.3 µg/mL was successfully detected in the range of 1.0 to 1000 µg/mL. Moreover, the SiO2@Au@Ag@4-MPBA for glucose detection was developed in the presence of glucose oxidase (GOx) at the optimized condition of 100 µg/mL GOx with 1-h incubation time using 20 µg/mL SiO2@Au@Ag@4-MPBA and measuring Raman signal at 67 µg/mL SiO2@Au@Ag. At the optimized condition, the calibration curve in the range of 0.5 to 8.0 mM was successfully developed with an LOD of 0.15 mM. Based on those strategies, the SERS detection of glucose can be achieved in the physiologically relevant concentration range and opened a great promise to develop a SERS-based biosensor for a variety of biomedicine applications.

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.

Multiplexed SERS Detection of Soluble Cancer Protein Biomarkers with Gold–Silver Alloy Nanoboxes and Nanoyeast Single-Chain Variable Fragments

2018 ◽  
Vol 90 (17) ◽  
pp. 10377-10384 ◽  
Author(s):  
Junrong Li ◽  
Jing Wang ◽  
Yadveer S. Grewal ◽  
Christopher B. Howard ◽  
Lyndon J. Raftery ◽  
...  
Keyword(s):  
Single Chain ◽  
Protein Biomarkers ◽  
Silver Alloy ◽  
Gold Silver ◽  
Sers Detection ◽  
Single Chain Variable Fragments

Ultrasensitive SERS detection of rhodamine 6G and p-nitrophenol based on electrochemically roughened nano-Au film

Talanta ◽  
2020 ◽  
Vol 210 ◽  
pp. 120631 ◽  
Author(s):  
Jiangcai Wang ◽  
Cuicui Qiu ◽  
Xijiao Mu ◽  
Hua Pang ◽  
Xinchun Chen ◽  
...  
Keyword(s):  
Rhodamine 6G ◽  
Au Film ◽  
Sers Detection
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