Two orders of magnitude extra SERS enhancement on silver nanoparticle-based substrate induced by laser irradiation in nitrogen ambient

2022 ◽  
Vol 265 ◽  
pp. 120372
Author(s):  
Chen Jin ◽  
Ji'an Chen ◽  
Zhengyang Du ◽  
Chang Liu ◽  
Fei Liu ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Silver Nanoparticle ◽  
Sers Enhancement

Oxygen Incorporation-Induced SERS Enhancement in Silver Nanoparticle-Decorated ZnO Nanowires

2020 ◽  
Vol 3 (2) ◽  
pp. 1666-1673 ◽  
Author(s):  
Agata Fularz ◽  
Sawsan Almohammed ◽  
James H. Rice
Keyword(s):  
Silver Nanoparticle ◽  
Zno Nanowires ◽  
Oxygen Incorporation ◽  
Sers Enhancement

scholarly journals Silver–Graphene Oxide Nanohybrids for Highly Sensitive, Stable SERS Platforms

2021 ◽  
Vol 9 ◽  
Author(s):  
Mateusz Kasztelan ◽  
Anna Studzinska ◽  
Grażyna Zofia Żukowska ◽  
Barbara Pałys
Keyword(s):  
Raman Spectroscopy ◽  
Ascorbic Acid ◽  
Graphene Oxide ◽  
Silver Nanoparticle ◽  
Surface Composition ◽  
Surface Enhanced Raman Spectroscopy ◽  
Ammonia Solution ◽  
Synthesis Conditions ◽  
Sers Enhancement ◽  
Surface Enhanced Raman

Graphene oxide–silver nanoparticle nanohybrids were synthesized by simple reduction of the silver nitrate and graphene oxide (GO) mixture in water using the mild reducing agent ascorbic acid. The concentration of ascorbic acid was varied to verify the possible influence of the GO surface composition on the efficiency of the hybrid material as substrates for surface enhanced Raman spectroscopy (SERS). Furthermore, the composites were conditioned in ammonia solution or in potassium hydroxide diluted solution. For comparison, the graphene oxide–silver nanoparticle composite has been synthesized using the ammonia-treated GO. All materials were characterized using spectroscopic and microscopic methods including UV–Vis, infrared, and Raman spectroscopy and scanning electron microscopy. The SERS efficiency of the nanohybrids was tested using 4-aminothiophenol (PATP). The optimal synthesis conditions were found. Ammonia and potassium peroxide drop-casted on the composite changed the SERS properties. The sample treated with KOH showed the best SERS enhancement. The variation of the SERS enhancement was correlated with the shape of the UV–Vis characteristics and the surface structure of the composites.

scholarly journals Effect of nanostructured silicon on surface enhanced Raman scattering

RSC Advances ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 6629-6633 ◽  
Author(s):  
Gang Lu ◽  
Guilin Wang ◽  
Hai Li
Keyword(s):  
Surface Morphology ◽  
Raman Scattering ◽  
Silver Nanoparticle ◽  
Surface Enhanced Raman Scattering ◽  
Silicon Surfaces ◽  
Sers Enhancement ◽  
Nanostructured Silicon ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

The surface morphology of non-metallic silicon has a big effect on the SERS enhancement of silver nanoparticle-coated silicon surfaces.

scholarly journals SERS enhancement of silver nanoparticles prepared by a template-directed triazole ligand strategy

2015 ◽  
Vol 51 (65) ◽  
pp. 13028-13031 ◽  
Author(s):  
Heba A. Kashmery ◽  
David G. Thompson ◽  
Ruggero Dondi ◽  
Samuel Mabbott ◽  
Duncan Graham ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Silver Nanoparticle ◽  
One Pot ◽  
Sers Enhancement ◽  
Triazole Ligand

A one-pot method to prepare silver nanoparticle (AgNP) nanotags using the Tollens' reagent is described.

scholarly journals Influence of Surfactants and Dissolved Gases on the Silver Nanoparticle Plasmon Resonance Absorption Spectra Formed by the Laser Ablation Processes

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Ming Jing Chua ◽  
Yoshinori Murakami
Keyword(s):  
Silver Nanoparticles ◽  
Laser Irradiation ◽  
Surface Plasmon ◽  
Silver Nanoparticle ◽  
Nanoparticle Synthesis ◽  
Dissolved Gas ◽  
Nanoparticle Growth ◽  
Spectral Shifts ◽  
Plausible Mechanism ◽  
Anionic And Cationic Surfactants

The silver nanoparticles were fabricated by the focused laser irradiation to silver rod immersed in various kinds of surfactant aqueous solutions. It was found that anionic and cationic surfactants showed different roles on the silver nanoparticle growth during the focused laser irradiation processes. Silver nanoparticle synthesis in an amphoteric surfactant aqueous solution was also carried out using the same techniques, and it was found that the spectral shifts for these surface plasmon bands showed complicated behaviors against the concentration of amphoteric surfactants as well as pH. Furthermore, the influence of the gas dissolved in a solution on the silver nanoparticle growth during the focused laser irradiation processes was investigated. With increasing the gas pressure of CO2, the surface plasmon bands of silver nanoparticles were shifted to longer wavelength, suggesting that the dissolved gas of CO2 in a solution enhances the silver nanoparticle growth. The plausible mechanism was proposed to understand the reason of such enhancement of silver nanoparticle growth by increasing the dissolved gas in a solution.

Chronic Laser Exposure Effects on Rabbit Retina

1972 ◽  
Vol 30 ◽  
pp. 54-55
Author(s):  
Burton B. Silver ◽  
Theodore Lawwill
Keyword(s):  
Laser Irradiation ◽  
Laser Light ◽  
Broad Band ◽  
Argon Laser ◽  
Atropine Sulfate ◽  
Ultrastructural Changes ◽  
Laser Exposure ◽  
Rabbit Retina ◽  
Histological Changes ◽  
Threshold Doses

Dutch-belted 1 to 2.5 kg anesthetized rabbits were exposed to either xenon or argon laser light administered in a broad band, designed to cover large areas of the retina. For laser exposure, the pupil was dilated with atropine sulfate 1% and pheny lephrine 10%. All of the laser generated power was within a band centered at 5145.0 Anstroms. Established threshold for 4 hour exposures to laser irradiation are in the order of 25-35 microwatts/cm2. Animals examined for ultrastructural changes received 4 hour threshold doses. These animals exhibited ERG, opthalmascopic, and histological changes consistent with threshold damage.One month following exposure the rabbits were killed with pentobarbitol. The eyes were immediately enucleated and dissected while bathed in 3% phosphate buffered gluteraldehyde.

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