Formation of noble metal nanoparticles through chemical reduction induced by coordination-alteration of complex ions in ionic liquids and electroanalytical application

2011 ◽  
Vol 13 (12) ◽  
pp. 1408-1412 ◽  
Author(s):  
Po-Yu Chen ◽  
Hsin-Yi Huang
Keyword(s):  
Ionic Liquids ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Chemical Reduction ◽  
Noble Metal Nanoparticles ◽  
Complex Ions

scholarly journals Noble Metal Nanoparticles-Based Colorimetric Biosensor for Visual Quantification: A Mini Review

Chemosensors ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 53 ◽  
Author(s):  
Lu Yu ◽  
Na Li
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Electrostatic Interactions ◽  
Organic Molecules ◽  
Chemical Reduction ◽  
Noble Metal Nanoparticles ◽  
Gold And Silver Nanoparticles ◽  
Local Surface Plasmon Resonance ◽  
Reliable Technique ◽  
Wide Range

Nobel metal can be used to form a category of nanoparticles, termed noble metal nanoparticles (NMNPs), which are inert (resistant to oxidation/corrosion) and have unique physical and optical properties. NMNPs, particularly gold and silver nanoparticles (AuNPs and AgNPs), are highly accurate and sensitive visual biosensors for the analytical detection of a wide range of inorganic and organic compounds. The interaction between noble metal nanoparticles (NMNPs) and inorganic/organic molecules produces colorimetric shifts that enable the accurate and sensitive detection of toxins, heavy metal ions, nucleic acids, lipids, proteins, antibodies, and other molecules. Hydrogen bonding, electrostatic interactions, and steric effects of inorganic/organic molecules with NMNPs surface can react or displacing capping agents, inducing crosslinking and non-crosslinking, broadening, or shifting local surface plasmon resonance absorption. NMNPs-based biosensors have been widely applied to a series of simple, rapid, and low-cost diagnostic products using colorimetric readout or simple visual assessment. In this mini review, we introduce the concepts and properties of NMNPs with chemical reduction synthesis, tunable optical property, and surface modification technique that benefit the development of NMNPs-based colorimetric biosensors, especially for the visual quantification. The “aggregation strategy” based detection principle of NMNPs colorimetric biosensors with the mechanism of crosslinking and non-crosslinking have been discussed, particularly, the critical coagulation concentration-based salt titration methodology have been exhibited by derived equations to explain non-crosslinking strategy be applied to NMNPs based visual quantification. Among the broad categories of NMNPs based biosensor detection analyses, we typically focused on four types of molecules (melamine, single/double strand DNA, mercury ions, and proteins) with discussion from the standpoint of the interaction between NMNPs surface with molecules, and DNA engineered NMNPs-based biosensor applications. Taken together, NMNPs-based colorimetric biosensors have the potential to serve as a simple yet reliable technique to enable visual quantification.

Formate Ionic Liquids Playing the Roles of Reducer and Stabilizer for the Synthesis of Noble Metal Nanoparticles

2017 ◽  
Vol 46 (9) ◽  
pp. 1344-1346 ◽  
Author(s):  
Shinya Okazoe ◽  
Yoshiro Yasaka ◽  
Masakatsu Ueno ◽  
Yoshifumi Kimura
Keyword(s):  
Ionic Liquids ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles

Conversion of lignin model compounds under mild conditions in pseudo-homogeneous systems

2016 ◽  
Vol 18 (8) ◽  
pp. 2341-2352 ◽  
Author(s):  
Lu Chen ◽  
Jiayu Xin ◽  
Lingli Ni ◽  
Huixian Dong ◽  
Dongxia Yan ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Catalyst System ◽  
Noble Metal Nanoparticles ◽  
Homogeneous Catalyst ◽  
Model Compounds ◽  
Lignin Model Compounds ◽  
Mild Conditions ◽  
Lignin Model

A novel pseudo-homogeneous catalyst system consisting of noble metal nanoparticles and ionic liquids is developed for the selective reductive cleavage of C–O and hydrodeoxygenation under mild conditions.

Investigation of Noble Metal Nanoparticles (Ag, Au, Pd, Pt) Produced by Chemical Reduction

2010 ◽  
Vol 659 ◽  
pp. 115-120 ◽  
Author(s):  
Ágnes Bajáki ◽  
János L. Lábár ◽  
Ágnes Csanády ◽  
Olga Geszti ◽  
Hajnalka Hargitai ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Growth Models ◽  
Chemical Reduction ◽  
Particle Size Analysis ◽  
Atomic Scale ◽  
Noble Metal Nanoparticles ◽  
Size Analysis ◽  
Environmental Friendly ◽  
Water Filters

This work describes atomic-scale, crystalline structure and size distribution for noble metal nanoparticles produced by water-based, environmental friendly technologies. The process was developed and implemented to produce noble metal nanoparticles to be used in water filters, sensors and cosmetics. The particles were investigated by TEM methods and particle size analysis. Growth process of the crystallites in sols made by chemical reduction in aqueous solutions is discussed. Comparison with growth models for vacuum deposited thin films is also identified.

Highly Stable Noble-Metal Nanoparticles in Tetraalkylphosphonium Ionic Liquids for in situ Catalysis

ChemSusChem ◽  
2011 ◽  
Vol 5 (1) ◽  
pp. 109-116 ◽  
Author(s):  
Abhinandan Banerjee ◽  
Robin Theron ◽  
Robert W. J. Scott
Keyword(s):  
Ionic Liquids ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles ◽  
In Situ Catalysis

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.

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