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.

Electrochemical Sensors Based on Noble Metal Nanoparticles in Voltammetry

2021 ◽  
Vol 887 ◽  
pp. 54-59
Author(s):  
D.O. Perevezentseva ◽  
Eduard V. Gorchakov
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Electrochemical Sensors ◽  
Narrow Range ◽  
Spherical Shape ◽  
High Sensitivity ◽  
Noble Metal Nanoparticles ◽  
Wide Range ◽  
Sulfur Containing

Portable electrochemical sensors based on noble metal nanoparticles (МеNPs) for the quantitative determination of hydrogen peroxide (H2O2) and sulfur-containing amino acids (cysteine, methionine, glutathione) are discussed. These sensors have high sensitivity (pM), with low sample requirements (<50 μl). This article discusses methods for producing sensors based on silver and gold nanoparticles and their application in voltammetry. It is shown that the sensitivity of H2O2 determination on a sensor based on silver nanoparticles (AgNPs) depends on their size. Their size is determined by the reducing agent. Sensors based on AgNPs of spherical shape with the smallest size from 0.5 to 17.5 nm have the highest sensitivity for determining H2O2, but a narrow range of determined concentrations. Sensors on medium-sized AgNPs have optimal metrological characteristics. Their size is from 10 to 55 nm, less sensitive, but with a wide range of determined concentrations from 0.1 to 1 nm H2O2. The linearity of the range of glutathione concentrations is 1.0-10.0 pM. The linearity of the range of determined concentrations of methionine is 1–26 рМ.

scholarly journals Electrospun Polymer Nanofibers Decorated with Noble Metal Nanoparticles for Chemical Sensing

2017 ◽  
Vol 12 (1) ◽  
Author(s):  
Chen Chen ◽  
Yongan Tang ◽  
Branislav Vlahovic ◽  
Fei Yan
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Chemical Sensing ◽  
Noble Metal Nanoparticles ◽  
Polymer Nanofibers

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 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.

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.

Structure and Optical Properties of Noble Metal Nanoparticles

2012 ◽  
Author(s):  
Christine M. Aikens
Keyword(s):  
Optical Properties ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles

scholarly journals Recent Advances in Plasmonic Photocatalysis Based on TiO 2 and Noble Metal Nanoparticles for Energy Conversion, Environmental Remediation, and Organic Synthesis

Small ◽  
2021 ◽  
pp. 2101638
Author(s):  
Ajay Kumar ◽  
Priyanka Choudhary ◽  
Ashish Kumar ◽  
Pedro H. C. Camargo ◽  
Venkata Krishnan
Keyword(s):  
Energy Conversion ◽  
Metal Nanoparticles ◽  
Organic Synthesis ◽  
Noble Metal ◽  
Environmental Remediation ◽  
Noble Metal Nanoparticles ◽  
Recent Advances
Sign in / Sign up

Export Citation Format

Share Document