A Label-Free Nanogold DNAzyme-Cleaved Surface-Enhanced Resonance Raman Scattering Method for Trace UO2 2+ Using Rhodamine 6G as Probe

Plasmonics ◽  
2012 ◽  
Vol 8 (2) ◽  
pp. 803-810 ◽  
Author(s):  
Zhiliang Jiang ◽  
Dongmei Yao ◽  
Guiqing Wen ◽  
Tingsheng Li ◽  
Bin Chen ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Rhodamine 6G ◽  
Resonance Raman ◽  
Scattering Method ◽  
Label Free ◽  
Resonance Raman Scattering ◽  
Surface Enhanced

A Surface-Enhanced Resonance Raman Scattering Method for the Determination of Trace Crystal Violet on Colloidal Au Nanoparticle Substrate

2013 ◽  
Vol 299 ◽  
pp. 191-194 ◽  
Author(s):  
Zhi Liang Jiang ◽  
Lu Ma ◽  
Ai Hui Liang
Keyword(s):  
Raman Scattering ◽  
Crystal Violet ◽  
Resonance Raman ◽  
Trisodium Citrate ◽  
Au Nanoparticle ◽  
Scattering Method ◽  
Resonance Raman Scattering ◽  
Buffer Solution ◽  
Surface Enhanced ◽  
Colloidal Au

Colloidal Au nanoparticles as active substrate for surface-enhanced resonance Raman scattering(SERRS) were prepared by the trisodium citrate-reduced procedure. In pH 6.6 Na2HPO4-NaH2PO4 buffer solution and in the presence of aggregation reagent NaCl, nanogolds were aggregated to form stable aggregated- nanogolds (ANG). The crystal violet (CV) adsorbed on the surface of ANG to form CV-ANG conjugates that produce strongest surface-enhanced resonance Raman scattering peak at 1616 cm-1. In the optimal condition, the SERRS intensity at 1616 cm-1 was linear to the CV concentration in the range of 2.5×10-8 -1.75×10-7 mol/L, a surface-enhanced resonance Raman scattering assay was set up for detection of trace CV, with good selectivity.

An Immunonanosilver Surface-Enhnaced Resonance Raman Scattering Method for Determination of Human Chorionic Gonadotrophin

2013 ◽  
Vol 319 ◽  
pp. 157-160 ◽  
Author(s):  
Xin Hui Zhang ◽  
Kun Li ◽  
Le Ning Hu ◽  
Ai Hui Liang ◽  
Zhi Liang Jiang
Keyword(s):  
Raman Scattering ◽  
Rhodamine 6G ◽  
Resonance Raman ◽  
Molecular Probe ◽  
Scattering Method ◽  
Resonance Raman Scattering ◽  
Serum Samples ◽  
Buffer Solution ◽  
Citric Acid Buffer

In pH 6.6 Na2HPO4-citric acid buffer solution and in the presence of KCl, the nanosilver-labeled rabbit anti-hCG (Ag-RAhCG) was aggregated un-specifically to the aggregations. Upon addition of rhodamine 6G (RhG) molecular probe, it adsorb on the surface of Ag-RAhCG aggregations that exhibited the strongest surface-enhnaced resonance Raman scattering (SERRS) peak at 613 cm-1. In the optimal condition, the decreased SERRS intensity responds linearly with the concentration of hCG over 0.05-1.75 µg/mL. Based on this, a new and simple SERRS method has been proposed for the determination of hCG in serum samples, with satisfactory results.

A Surface-Enhanced Resonance Raman Scattering Method for Trace Cystine Using 4-Mercaptopyridine-Aggregated-Nanosilver as Probe

2013 ◽  
Vol 647 ◽  
pp. 181-184
Author(s):  
Yan Yan Wei ◽  
Fang Li ◽  
Ai Hui Liang ◽  
Zhi Liang Jiang
Keyword(s):  
Detection Limit ◽  
Raman Scattering ◽  
Optimal Condition ◽  
Resonance Raman ◽  
Scattering Method ◽  
Resonance Raman Scattering ◽  
Buffer Solution ◽  
Surface Enhanced ◽  
Sers Intensity

A stable nanosilver solution was prepared, using PEG10000 as stabilizer and NaBH4 as reducer. In pH 6.6 Na2HPO4-NaH2PO4 buffer solution containing PEG10000 and NaCl, nanosilvers were aggregated to form the stable aggregated-nanosilvers (ANS) that could conjugate with 4-mercaptopyridine (MP) to produce an ANS-MP surface-enhanced resonance Raman scattering (SERRS) probe, which exhibited a strong SERS peak at 1097 cm-1. When cystine (Cy) concentration increased, the SERS intensity at 1097 cm-1 decreased linearly. In the optimal condition, the decreased SERRS intensity was linear to Cy concentration in the range of 5.0×10-9-1.4×10-7 mol/L, with a detection limit of 2.0×10-9 mol/L Cy.

Towards deep-UV surface-enhanced resonance Raman spectroscopy of explosives: ultrasensitive, real-time and reproducible detection of TNT

The Analyst ◽  
2015 ◽  
Vol 140 (16) ◽  
pp. 5671-5677 ◽  
Author(s):  
Shankar K. Jha ◽  
Yasin Ekinci ◽  
Mario Agio ◽  
Jörg F. Löffler
Keyword(s):  
Raman Spectroscopy ◽  
Raman Scattering ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Label Free ◽  
Resonance Raman Scattering ◽  
Label Free Detection ◽  
Surface Enhanced ◽  
Deep Ultraviolet ◽  
Deep Uv

We report ultrasensitive and label-free detection of 2,4,6-trinitrotoluene (TNT) deposited by drop coating using deep-ultraviolet surface-enhanced resonance Raman scattering (DUV-SERRS).

A New and Reproducible Surface-Enhanced Resonance Raman Scattering Method for the Determination of Trace Au(III) in Solution Using 4-Mercaptopyridine as Molecular Probe

2013 ◽  
Vol 664 ◽  
pp. 32-36
Author(s):  
Yan Yan Wei ◽  
Gui Qing Wen ◽  
Qing Ye Liu ◽  
Zhi Liang Jiang
Keyword(s):  
Detection Limit ◽  
Raman Scattering ◽  
Resonance Raman ◽  
Molecular Probe ◽  
Scattering Method ◽  
Resonance Raman Scattering ◽  
Buffer Solution ◽  
Surface Enhanced ◽  
Stable Reagent

In pH 6.5 Na2HPO4-NaH2PO4 buffer solution and in the presence of stable reagent PEG10000 and aggregation reagent NaCl, nanosilvers were aggregated to form stable aggregated-nanosilvers (ANS). The molecular probe of 4-mercaptopyridine (MP) adsorbed on the surface of ANS to form MP-ANS conjugates that produce strongest surface-enhanced resonance Raman scattering (SERRS) peak at 1097 cm-1. When Au(III) was added, the SERRS intensity at 1097 cm-1 decreased. The decreased SERRS intensity was linear to Au(III) concentration in the range of 5-50 ×10-10 mol/L, with a detection limit of 2.0×10-10 mol/L Au(III).

Approach to Single Molecule Detection Using Surface-Enhanced Resonance Raman Scattering (SERRS): A Study Using Rhodamine 6G on Colloidal Silver

1995 ◽  
Vol 49 (6) ◽  
pp. 780-784 ◽  
Author(s):  
Katrin Kneipp ◽  
Yang Wang ◽  
Ramachandra R. Dasari ◽  
Michael S. Feld
Keyword(s):  
Raman Scattering ◽  
Single Molecule ◽  
Rhodamine 6G ◽  
Detection System ◽  
Resonance Raman ◽  
Single Molecule Detection ◽  
Colloidal Silver ◽  
Fiber Optic Probe ◽  
Resonance Raman Scattering ◽  
Surface Enhanced

We have measured surface-enhanced resonance Raman scattering (SERRS) spectra of rhodamine 6G (R6G) at concentrations as low as 8 × 10−16 M in colloidal silver solution activated by NaCl ions. The spectra were measured with a fiber-optic probe using the 514.5-nm argon-ion laser line as excitation source and a charge-coupled-device (CCD) detection system. The correlation of SERRS photo counts and R6G concentration was found to be linear between 8 × 10−11 and 8 × 10−14 M concentrations within our experimental accuracy. Experiments conducted with small scattering volumes show that fewer than 100 R6G molecules are sufficient to give rise to a SERRS spectrum with reasonable signal-to-noise ratio. These results demonstrate that in certain cases SERRS can achieve detection limits comparable to those for fluorescence spectroscopy, and at the same time provides higher structural specificity than fluorescence. The possibilities of using SERRS for single molecule detection are discussed.

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