Preparation of Au/CeO2 Exhibiting Strong Surface Plasmon Resonance Effective for Selective or Chemoselective Oxidation of Alcohols to Aldehydes or Ketones in Aqueous Suspensions under Irradiation by Green Light

2012 ◽  
Vol 134 (35) ◽  
pp. 14526-14533 ◽  
Author(s):  
Atsuhiro Tanaka ◽  
Keiji Hashimoto ◽  
Hiroshi Kominami
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Green Light ◽  
Aqueous Suspensions ◽  
Oxidation Of Alcohols ◽  
Strong Surface

An in situ SERS study of plasmonic nanochemistry based on bifunctional “hedgehog-like” arrays

Nanoscale ◽  
2019 ◽  
Vol 11 (19) ◽  
pp. 9422-9428 ◽  
Author(s):  
Yuduo Guan ◽  
Zengyao Wang ◽  
Panpan Gu ◽  
Yu Wang ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Strong Surface

An in situ SERS study of plasmonic nanochemistry is realized on hierarchical Ag “hedgehog-like” arrays with strong surface plasmon resonance.

Fabrication and Visible Response of Au-TiO2 (P25) Composite Photocatalyst with Obvious Surface Plasmon Resonance Effect

2012 ◽  
Vol 465 ◽  
pp. 215-219
Author(s):  
Ying Liu ◽  
Hong Tao Yu ◽  
Xie Quan
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Resonance Effect ◽  
Phenol Degradation ◽  
Composite Photocatalyst ◽  
Characteristic Absorption Peak ◽  
Strong Surface ◽  
Degussa P25 ◽  
20 Nm

Au-TiO2 composite photocatalysis material was fabricated by the photodeposition method. The SEM and TEM images demonstrate that Au-TiO2 NPs are with inerratic geometry and their diameters are in the range of 10 nm to 20 nm. The UV-vis spectra shows the strong peaks in 200-400 nm and near 550 nm which are attributed to the characteristic absorption peak of TiO2 and the strong surface-plasmon-resonance of Au NPs, respectively. Under visible light irradiation, the phenol degradation dynamics constant on Au-TiO2 was 0.008 min-1 which was 4 times of that on Degussa P25. The effects of Au amount on the photocatalytic capability of Au-TiO2 were also investigated.

scholarly journals Optimization of Plasmonic Gold Nanoparticle Concentration in Green LED Light Active Dental Photopolymer

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 275
Author(s):  
Katalin Bukovinszky ◽  
Melinda Szalóki ◽  
István Csarnovics ◽  
Attila Bonyár ◽  
Péter Petrik ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Refractive Index Change ◽  
Green Light ◽  
Dental Composite ◽  
Index Change ◽  
The Matrix ◽  
Spr Effect

Gold nanoparticles (AuNPs) display surface plasmon resonance (SPR) as a result of their irradiation at a targeted light frequency. SPR also results in heat production that increases the temperature of the surrounding environment, affecting polymerization. The aim was to investigate the SPR effect of AuNPs on a dimethacrylate-based photopolymer system. The tested composites were designed to overlap the illumination required for the polymerization and the plasmon effect. The 5 nm-sized dodecanethiol capped AuNPs were applied in different concentrations in the matrix that were irradiated with green light (λ = 532 nm), where the Irgacure 784 photoinitiator also absorbs the light. The plasmonic effect was investigated for the refractive index change by surface plasmon resonance imaging (SPRi) supplemented by ellipsometry. Moreover, optical transmission and transmission electron micrographs (TEM), diametral tensile stress (DTS), and confocal Raman spectroscopy was performed to determine the degree of conversion (DC) at 1.0, 1.4, and 2.0 mW/cm2 light intensities. It was found that the optimal conditions were at 0.0208 wt% AuNPs concentration and 1.4 mW/cm2 light intensity at which the refractive index change, DTS, and DC data were all maximal. The study confirmed that AuNPs are applicable to improve the polymerization efficiency of dental composite resin.

scholarly journals Space‐Confined Seeded Growth of Cu Nanorods with Strong Surface Plasmon Resonance for Photothermal Actuation

2019 ◽  
Vol 131 (27) ◽  
pp. 9376-9382 ◽  
Author(s):  
Jinxing Chen ◽  
Ji Feng ◽  
Fan Yang ◽  
Rashed Aleisa ◽  
Qiao Zhang ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Seeded Growth ◽  
Strong Surface

Single Nanoparticle Spectroelectrochemistry Studies Enabled by Localized Surface Plasmon Resonance

2021 ◽  
Author(s):  
Shanlin Pan ◽  
Xiao Li ◽  
Jeetika Yadav
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Metallic Nanoparticles ◽  
Dark Field ◽  
Localized Surface Plasmon ◽  
Single Nanoparticle ◽  
Resonance Properties ◽  
Strong Surface ◽  
Made In

This review describes recent progress made in the field of spectroelectrochemistry analysis of single metallic nanoparticles (NPs) which have strong surface plasmon resonance properties. Dark-field scattering (DFS), photoluminescence (PL), and...

scholarly journals Covalently Conjugated Gold–Porphyrin Nanostructures

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1644 ◽  
Author(s):  
Luca Spitaleri ◽  
Chiara M. A. Gangemi ◽  
Roberto Purrello ◽  
Giuseppe Nicotra ◽  
Giuseppe Trusso Sfrazzetto ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Au Nanoparticles ◽  
Network Size ◽  
Present System ◽  
Luminescence Signal ◽  
Strong Luminescence ◽  
Strong Surface

Gold nanoparticles show important electronic and optical properties, owing to their size, shape, and electronic structures. Indeed, gold nanoparticles containing no more than 30–40 atoms are only luminescent, while nanometer-sized gold nanoparticles only show surface plasmon resonance. Therefore, it appears that gold nanoparticles can alternatively be luminescent or plasmonic and this represents a severe restriction for their use as optical material. The aim of our study was the fabrication of nanoscale assembly of Au nanoparticles with bi-functional porphyrin molecules that work as bridges between different gold nanoparticles. This functional architecture not only exhibits a strong surface plasmon, due to the Au nanoparticles, but also a strong luminescence signal due to porphyrin molecules, thus, behaving as an artificial organized plasmonic and fluorescent network. Mutual Au nanoparticles–porphyrin interactions tune the Au network size whose dimension can easily be read out, being the position of the surface plasmon resonance strongly indicative of this size. The present system can be used for all the applications requiring plasmonic and luminescent emitters.

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