scholarly journals Aggregation induced emission enhancement by plasmon coupling of noble metal nanoparticles

2019 ◽  
Vol 3 (11) ◽  
pp. 2421-2427 ◽  
Author(s):  
Jiangling He ◽  
Shuang Li ◽  
Da Lyu ◽  
Dingfeng Zhang ◽  
Xiao Wu ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Ag Nanoparticles ◽  
Noble Metal Nanoparticles ◽  
Plasmon Coupling ◽  
Biological Sensing ◽  
Enhanced Fluorescence ◽  
Aggregation Induced Emission ◽  
Emission Enhancement ◽  
Highly Sensitive

Aggregation induced plasmon coupling enhanced fluorescence of a pre-quenched chromophore has been demonstrated by using Au and Au@Ag nanoparticles, which could be further utilized to develop highly sensitive chemical and biological sensing schemes.

Effect of Noble Metal Nanoparticles in SERRS Measurements of Water-Soluble Porphyrins

2015 ◽  
Vol 1088 ◽  
pp. 43-47
Author(s):  
Pavlína Andrýsková ◽  
Karolína Machalová Šišková ◽  
Ariana Fargašová ◽  
Radek Zbořil
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Ag Nanoparticles ◽  
Chemical Reduction ◽  
Resonance Raman Spectroscopy ◽  
Water Soluble ◽  
Noble Metal Nanoparticles ◽  
Surface Enhanced ◽  
Reduction Methods ◽  
Insight Into

Use of the noble metal nanoparticles in the surface-enhanced resonance Raman spectroscopy (SERRS) is a significant part the measurement. These nanoparticles are often used for SERRS measurements of silver nanoparticles prepared by reduction methods. From the literature it is obvious that the most popular methods of preparation of Ag nanoparticles are procedures which are using the chemical reduction and/or laser ablation. In this paper we discuss the comparison of SERRS spectra of water-soluble porphyrins (TTMAPP and TMPyP) in systems with Ag nanoparticles prepared by chemical reduction with sodium borohydride, sodium citrate and glucose. The comparison of different systems gives insight into the option of suitableility of using of nanoparticles with various surface ions in the production of different spectral forms of chosen porphyrins in dependence on their structures.

scholarly journals Chemical sensing with Au and Ag nanoparticles

2021 ◽  
Author(s):  
Verónica Montes-García ◽  
Marco A. Squillaci ◽  
Marta Diez-Castellnou ◽  
Quy Khac Ong ◽  
Francesco Stellacci ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Ag Nanoparticles ◽  
Chemical Sensing ◽  
High Sensitivity ◽  
Fast Response ◽  
Noble Metal Nanoparticles ◽  
Sensitivity And Selectivity

Noble metal nanoparticles (NPs) are ideal scaffolds for the fabrication of chemical sensing devices with either optical or electrical readout combining high sensitivity and selectivity, along with fast response and full reversibility.

scholarly journals Surface Plasmon Enhancement of Eu3+ Emission Intensity in LaPO4/Ag Nanoparticles

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3071
Author(s):  
Sanja Kuzman ◽  
Jovana Periša ◽  
Vesna Đorđević ◽  
Ivana Zeković ◽  
Ivana Vukoje ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Ag Nanoparticles ◽  
Emission Intensity ◽  
Close Packing ◽  
Noble Metal Nanoparticles ◽  
Localized Surface Plasmon

A promising way to improve the performance of luminescent materials is to combine them with noble metal nanoparticles. Herein, a set of silver/europium-doped lanthanum orthophosphate (Ag/La0.95Eu0.05PO4) nanostructures with different concentrations of silver nanoparticles were prepared and investigated. The presented overlap between the strongest europium (Eu3+) excitation line and the broad silver nanoparticle surface plasmon resonance makes the combination prospective for coupling. X-ray powder diffraction confirmed the monoclinic monazite structure. The transmission electron microscopy revealed particles with a rod-like shape and ~4 aspect ratio. Photoluminescence spectra show characteristic Eu3+ ion red emission. One of the requirements for an enhanced luminescence effect is the precise control of the distance between the noble metal nanoparticles and the emitter ion. The distance is indirectly varied throughout the change of Ag nanoparticle concentration in the La0.95Eu0.05PO4 host. The emission intensity increases with the increase in Ag nanoparticles up to 0.6 mol %, after which the luminescence decreases due to the nanoparticles’ close packing and aggregation leading to the displacement of La0.95Eu0.05PO4 from the vicinity of the metal particles and reabsorption of the emitted light. The emission intensity of La0.95Eu0.05PO4 increases more than three times when the Eu3+ excitation is supported by the localized surface plasmon resonance in the Ag/La0.95Eu0.05PO4 nanostructures.

scholarly journals Noble Metal Nanoparticles Applications in Cancer

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
João Conde ◽  
Gonçalo Doria ◽  
Pedro Baptista
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Biomedical Applications ◽  
Noble Metal Nanoparticles ◽  
Clinical Settings ◽  
Adverse Side Effects ◽  
Molecular Therapeutics ◽  
Highly Sensitive ◽  
Drug And Gene Delivery

Nanotechnology has prompted new and improved materials for biomedical applications with particular emphasis in therapy and diagnostics. Special interest has been directed at providing enhanced molecular therapeutics for cancer, where conventional approaches do not effectively differentiate between cancerous and normal cells; that is, they lack specificity. This normally causes systemic toxicity and severe and adverse side effects with concomitant loss of quality of life. Because of their small size, nanoparticles can readily interact with biomolecules both at surface and inside cells, yielding better signals and target specificity for diagnostics and therapeutics. This way, a variety of nanoparticles with the possibility of diversified modification with biomolecules have been investigated for biomedical applications including their use in highly sensitive imaging assays, thermal ablation, and radiotherapy enhancement as well as drug and gene delivery and silencing. Here, we review the available noble metal nanoparticles for cancer therapy, with particular focus on those already being translated into clinical settings.

scholarly journals Enhancing spectral shifts of plasmon-coupled noble metal nanoparticles for sensing applications

2015 ◽  
Vol 17 (1) ◽  
pp. 422-427 ◽  
Author(s):  
Kristian L. Göeken ◽  
Vinod Subramaniam ◽  
Ron Gill
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Au Nanoparticles ◽  
Noble Metal Nanoparticles ◽  
Plasmon Coupling ◽  
Dna Sensing ◽  
Sensing Applications ◽  
Spectral Shifts

Enhancing spectral shifts for DNA sensing by heterogeneous plasmon coupling of Ag and Au nanoparticles.

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