Simple route for intermatrix synthesis of polymer stabilized core-shell metal nanoparticles for sensor applications

2007 ◽  
Vol 204 (6) ◽  
pp. 1686-1692 ◽  
Author(s):  
D. N. Muraviev ◽  
J. Macanás ◽  
M. J. Esplandiu ◽  
M. Farre ◽  
M. Muñoz ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Core Shell ◽  
Simple Route ◽  
Sensor Applications ◽  
Polymer Stabilized

Preparation and characterization of polymer-stabilized metal nanoparticles for sensor applications

2006 ◽  
Vol 203 (6) ◽  
pp. 1194-1200 ◽  
Author(s):  
J. Macanás ◽  
M. Farre ◽  
M. Muñoz ◽  
S. Alegret ◽  
D. N. Muraviev
Keyword(s):  
Metal Nanoparticles ◽  
Sensor Applications ◽  
Polymer Stabilized

Extractant Assisted Synthesis of Polymer Stabilized Platinum and Palladium Metal Nanoparticles for Sensor Applications

2006 ◽  
Vol 24 (5) ◽  
pp. 731-745 ◽  
Author(s):  
Dmitri N. Muraviev ◽  
Maria Isabel Pividory ◽  
José Luis Montañez Soto ◽  
Salvador Alegret
Keyword(s):  
Metal Nanoparticles ◽  
Sensor Applications ◽  
Polymer Stabilized ◽  
Palladium Metal

Impact of the capping agent removal from Au NPs@MOF core-shell nanoparticles heterogeneous catalysts

2022 ◽  
Author(s):  
Shan Dai ◽  
Kieu Phung Ngoc ◽  
Laurence Grimaud ◽  
Sanjun Zhang ◽  
Antoine Tissot ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Heterogeneous Catalysts ◽  
Synergistic Effects ◽  
Core Shell ◽  
Capping Agent ◽  
Shell Nanoparticles ◽  
Au Nps ◽  
Capping Agents ◽  
Core Shell Nanoparticles

Metal nanoparticles encased in a MOF shell have shown remarkable properties in catalysis due to potential synergistic effects. However, capping agents, commonly used to prepare these nanoparticles, lower their reactivity...

Noble metal@metal oxide semiconductor core@shell nano-architectures as a new platform for gas sensor applications

RSC Advances ◽  
2015 ◽  
Vol 5 (93) ◽  
pp. 76229-76248 ◽  
Author(s):  
Prabhakar Rai ◽  
Sanjit Manohar Majhi ◽  
Yeon-Tae Yu ◽  
Jong-Heun Lee
Keyword(s):  
Gas Sensor ◽  
Noble Metal ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Research Progress ◽  
Core Shell ◽  
Feature Article ◽  
Sensor Applications ◽  
Metal Metal ◽  
Recent Research Progress

This feature article focuses on recent research progress in noble metal@metal oxides core@shell NPs for gas sensor applications.

Fabrication and Characterization of Spectroscopically Encoded Core-shell Nanoparticle-polymer Nanocomposite

2007 ◽  
Vol 1054 ◽  
Author(s):  
Sheng Dai ◽  
Abdiaziz A. Farah ◽  
Ramon A Alvarez-Puebla ◽  
Juan P Bravo-Vasquez ◽  
Hicham Fenniri
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metals ◽  
Water Soluble ◽  
Metallic Surface ◽  
Core Shell ◽  
Seeded Emulsion Polymerization ◽  
Binding Interaction ◽  
Self Assembling ◽  
Vis Spectroscopy ◽  
Sulfur Containing

ABSTRACTMetal nanoparticles are of great importance in the fabrication of new nanocomposite materials. One area of increasing interest is the application of metal nanoparticles (NP) as substrates for surface enhanced Raman scattering (SERS). In this regard, self-assembled monolayers (SAMs) of sulfur containing organic compounds are ideal target for SERS studies due to the strong affinity of sulfur for noble metals. Two types of molecules were synthesized for this study, an organic-soluble and a water-soluble styrene derivative. Self-assembling behaviors of these monomers on gold or silver nanostructured surfaces at room temperature were studied by UV-Vis spectroscopy, dynamic light scattering (DLS), SERS spectroscopy, and scanning electron microscopy (SEM). It was found that the interaction between sulfur compounds and metal NPs is strongly dependent on the NP size and the monomer environment. The hydrophilic NP surface switches to hydrophobic upon binding of sulfur-containing monomers, which leads to the formation of aggregates in aqueous solution for both water-soluble and oil-soluble monomers. The self-assembling behavior of these monomers on the metallic surface was compared with that of the corresponding homopolymers. Due to macromolecular and steric effects, the binding interaction between homopolymer and metal NP is weaker than that between NP and monomers. Surface polymerization of these monomers on metallic surfaces was observed as supported by SERS. Core-shell nanoparticles could also be obtained through seeded emulsion polymerization, but a decrease in SERS activity was observed.

Thermosensitive Core-Shell Microgel as a “Nanoreactor” for Metal Nanoparticles

2009 ◽  
Vol 1234 ◽  
Author(s):  
Yan Lu ◽  
Matthias Ballauff
Keyword(s):  
Catalytic Activity ◽  
Metal Nanoparticles ◽  
Room Temperature ◽  
Catalytic Reduction ◽  
Core Shell ◽  
Carrier System ◽  
Volume Transition ◽  
Oxidation Of Alcohols ◽  
Influence Of Temperature On ◽  
Metal Nanocomposites

AbstractIn our study, thermosensitive core-shell microgel particles have been used as the carrier system for the deposition of metal nanoparticles, in which the core consists of polystyrene (PS) whereas the shell consists of poly(N-isopropylacrylamide) (PNIPA) network crosslinked by N, N'-methylenebisacrylamide (BIS). Silver, gold and palladium nanoparticles have been homogeneously embedded into thermosensitive PNIPA-networks, respectively. We demonstrate that the catalytic activity of the microgel-metal nanocomposites can be tuned by the volume transition within the microgel of these systems by using the catalytic reduction of 4-nitrophenol as the model reaction. Moreover, following the concept of a “green chemistry”, the oxidation of alcohols to the corresponding aldehydes or ketones can be carried out in aqueous solution under aerobic conditions at room temperature by using microgel-metal nanocomposites as the catalyst. The influence of temperature on the catalytic activity has been also investigated, which will be affected both by the volume transition of the microgel and by the change of polarity of the microgel in this case.

Controllable assembly of two types of metal nanoparticles onto block copolymer nanospheres with ordered spatial distribution

2015 ◽  
Vol 3 (7) ◽  
pp. 3382-3389 ◽  
Author(s):  
Shilin Mei ◽  
Jie Cao ◽  
Yan Lu
Keyword(s):  
Spatial Distribution ◽  
Block Copolymer ◽  
Metal Nanoparticles ◽  
Catalytic Properties ◽  
Reduction Process ◽  
Template Method ◽  
Core Shell ◽  
Aao Template ◽  
Shell Particles

Pd@PS-P2VP @DT–Au core–shell particles are fabricated based on the modified AAO template method and anin situreduction process, showing efficient optical and catalytic properties.

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