Controlled synthesis of Pd and Pd–Au nanoparticles: effect of organic amine and silanol groups on morphology and polycrystallinity of nanomaterials

RSC Advances ◽  
2015 ◽  
Vol 5 (15) ◽  
pp. 10964-10973 ◽  
Author(s):  
Prem C. Pandey ◽  
Richa Singh
Keyword(s):  
Au Nanoparticles ◽  
Specific Interaction ◽  
Reducing Agent ◽  
Controlled Synthesis ◽  
Organic Amine ◽  
Silanol Groups ◽  
New Process

New process for 3-APTMS and organic reducing agent mediated synthesis of amphiphilic PdNPs, Pd-Au/Au-Pd justifying specific interaction of silanol with PdNPs controlling polycrystallinity, nanogeometry, morphology and functionality.

Controlled synthesis of well-dispersed Au nanoparticles passivated by tiopronin

2011 ◽  
Vol 41 (9) ◽  
pp. 1036-1040
Author(s):  
XingJie LIANG ◽  
ShaSha WANG ◽  
ShuaiDong HUO ◽  
ShengTai HE ◽  
KeYang HUANG ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Controlled Synthesis

Shape-controlled synthesis of palladium nanocrystals by microwave irradiation

2009 ◽  
Vol 81 (12) ◽  
pp. 2377-2385 ◽  
Author(s):  
Yanchun Yu ◽  
Yanxi Zhao ◽  
Tao Huang ◽  
Hanfan Liu
Keyword(s):  
Microwave Irradiation ◽  
Microwave Heating ◽  
Reducing Agent ◽  
Tetraethylene Glycol ◽  
Controlled Synthesis ◽  
Shape Controlled

The controlled synthesis of Pd icosahedra in tetraethylene glycol (TEG) with H2PdCl4 as a precursor and poly(vinylpyrrolidone) (PVP) as a stabilizer in the presence of an appropriate amount of KOH under microwave irradiation was demonstrated. TEG served as both solvent and reducing agent, and stable Pd icosahedra with uniform sizes and well-defined shapes could be prepared in a yield of over 90 % by microwave heating for 60 s. The sizes of Pd icosahedra can be well controlled by adjusting the concentration of the precursor H2PdCl4.

Growth pathways of silver nanoplates in kinetically controlled synthesis: bimodal versus unimodal growth

RSC Advances ◽  
2015 ◽  
Vol 5 (19) ◽  
pp. 14266-14272 ◽  
Author(s):  
Mun Ho Kim ◽  
Dong Ki Yoon ◽  
Sang Hyuk Im
Keyword(s):  
Reducing Agent ◽  
Controlled Synthesis ◽  
Silver Nanoplates ◽  
Kinetically Controlled ◽  
Kinetically Controlled Synthesis

In the kinetically controlled synthesis, the growth of Ag nanoplates proceeded along different pathways depending on the concentration of PVP serving as both a reducing agent and a stabilizer.

Deposition of Au nanoparticles inside porous CeO2 nanocubes using Langmuir–Blodgett technique

2018 ◽  
Vol 42 (2) ◽  
pp. 1379-1386 ◽  
Author(s):  
Subhasis Das ◽  
Gourab Bhattacharjee ◽  
Biswarup Satpati ◽  
Mukesh Kumar ◽  
Sasanka Deka ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Dual Role ◽  
Reducing Agent ◽  
Langmuir Blodgett

AuCl4-ions are reduced to Au0 inside the pores of CeO2 nanocubes by oleylamine, which has the dual role of capping and reducing agent.

scholarly journals A mechano-colloidal approach for the controlled synthesis of metal nanoparticles

2019 ◽  
Vol 55 (95) ◽  
pp. 14267-14270 ◽  
Author(s):  
Paulo F. M. de Oliveira ◽  
Jhon Quiroz ◽  
Daniela C. de Oliveira ◽  
Pedro H. C. Camargo
Keyword(s):  
Metal Nanoparticles ◽  
Au Nanoparticles ◽  
Controlled Synthesis

We propose a mechano-colloidal approach marrying the attractive features of both mechanochemical and colloidal syntheses to produce well-defined Au nanoparticles.

Reinforcement of Silicone Rubber by Particulate Silica

1975 ◽  
Vol 48 (4) ◽  
pp. 558-576 ◽  
Author(s):  
B. B. Boonstra ◽  
H. Cochrane ◽  
E. M. Dánnenberg
Keyword(s):  
Silicone Rubber ◽  
Silica Surface ◽  
Specific Interaction ◽  
Interaction Coefficient ◽  
Hydroxyl Groups ◽  
Surface Hydroxyl ◽  
Silanol Groups ◽  
Compression Set ◽  
Surface Hydroxyl Groups ◽  
Bound Rubber

Abstract The interaction between fumed silica and silicone elastomer after various treatments of the silica surface has been investigated. The effect of the treatments was determined by measuring bound rubber, an interaction coefficient by means of the oscillating disk rheometer, the mechanical properties of the vulcanizates, the morphology of the silica aggregates, and the use of an hydroxyl-terminated silicone rubber. The results indicated that the interaction is much more intensive than in carbon black-hydrocarbon rubber systems. This is demonstrated by much higher bound rubber values (by a factor of 2–3) and a higher interaction coefficient. It is shown that the major effect on this interaction coefficient is the specific interaction by hydrogen bonding, between silica surface silanol groups and the polydimethylsiloxane chain. In this bonding the isolated hydroxyl groups should play the major part. Partial inactivation of these isolated silanol groups leads to improved strength but lower modulus. Maximum inactivation of the surface hydroxyl groups leads to soft compounds with lower tensile strengths and moduli, as well as very low bound rubber. Replacement of surface hydroxyl groups by vinyldimethylsilyl groups did not have the expected activating effect. Apparently the attached vinyldimethylsilyl groups do not form crosslinks with the elastomer chains, so that the overall result of the presence of these groups on the silica surface is a weakening of the interaction with the silicone rubber chains, although to a lesser degree than in the case of trimethylsilyl groups. The interaction between filler surface and polysiloxane can be maximizedby the use of a hydroxyl-terminated elastomer. The terminal groups will react with the silica surface so strongly that the particles act as crosslinks after proper heat treatment and a crosslinked polymer is obtained with a tensile strength of the same level as a peroxide-crosslinked vulcanizate but with higher compression set. At the temperature of the compression set test (175°C) the bonds apparently rearrange so that the permanent deformation is practically 100%. Quantitative data have been presented which prove that breakdown of silica aggregates does occur during mixing in silicone rubber on a two-roll mill.

Shape-controlled synthesis of CO-free Pd nanocrystals with the use of formic acid as a reducing agent

2016 ◽  
Vol 52 (85) ◽  
pp. 12594-12597 ◽  
Author(s):  
Shixiong Bao ◽  
Xuan Yang ◽  
Ming Luo ◽  
Shan Zhou ◽  
Xue Wang ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Formic Acid ◽  
Reducing Agent ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Controlled Synthesis ◽  
Ft Ir ◽  
Shape Controlled ◽  
No Chemisorption ◽  
Ft Ir Spectroscopy

This paper reports the use of formic acid as a reducing agent for the shape-controlled synthesis of Pd nanocrystals with no chemisorption of CO on the surface, as confirmed by attenuated total reflection Fourier transform infrared (ATR-FT-IR) spectroscopy.

Sodium citrate: A universal reducing agent for reduction / decoration of graphene oxide with au nanoparticles

Nano Research ◽  
2011 ◽  
Vol 4 (6) ◽  
pp. 599-611 ◽  
Author(s):  
Zhe Zhang ◽  
Huihui Chen ◽  
Chunyan Xing ◽  
Mingyi Guo ◽  
Fugang Xu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Sodium Citrate ◽  
Au Nanoparticles ◽  
Reducing Agent

On the Synthesis of Au Nanoparticles Using EDTA as a Reducing Agent

2013 ◽  
Vol 117 (40) ◽  
pp. 20958-20966 ◽  
Author(s):  
Hélène Dozol ◽  
Guillaume Mériguet ◽  
Bernard Ancian ◽  
Valérie Cabuil ◽  
Haolan Xu ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Reducing Agent

Development and application of a nanocomposite derived from crosslinked HPMC and Au nanoparticles for colon targeted drug delivery

RSC Advances ◽  
2015 ◽  
Vol 5 (35) ◽  
pp. 27481-27490 ◽  
Author(s):  
Raghunath Das ◽  
Dipankar Das ◽  
Paulomi Ghosh ◽  
Santanu Dhara ◽  
Asit Baran Panda ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Targeted Drug Delivery ◽  
Au Nanoparticles ◽  
Methyl Cellulose ◽  
Reducing Agent ◽  
Hydroxypropyl Methyl Cellulose ◽  
Targeted Drug ◽  
Poly Acrylamide

Herein, we report a novel route for the synthesis of poly(acrylamide) (PAAm) crosslinked hydroxypropyl methyl cellulose/Au nanocomposite where chemically crosslinked HPMC (c-HPMC) works as a reducing agent.

Sign in / Sign up

Export Citation Format

Share Document