Size Control of Monodisperse Metal Nanocrystals in Ionic Liquids

2015 ◽  
pp. 55-78 ◽  
Author(s):  
Pascal Lignier
Keyword(s):  
Ionic Liquids ◽  
Size Control ◽  
Metal Nanocrystals

New Materials for Electrocatalysis: Ionic Liquids and Metal Nanocrystals

2020 ◽  
Vol MA2020-01 (46) ◽  
pp. 2646-2646
Author(s):  
Xiangqun Zeng ◽  
Xiaojun Liu ◽  
Yongan Tang
Keyword(s):  
Ionic Liquids ◽  
New Materials ◽  
Metal Nanocrystals

Rational size control of gold nanoparticles employing an organometallic precursor [Au-C≡C- t-Bu]4 and tunable thiolate-functionalized ionic liquids in organic medium

2012 ◽  
Vol 90 (1) ◽  
pp. 145-152 ◽  
Author(s):  
Kylie L. Luska ◽  
Audrey Moores
Keyword(s):  
Gold Nanoparticles ◽  
Ionic Liquids ◽  
Chain Length ◽  
Alkyl Chain ◽  
Size Control ◽  
Organic Medium ◽  
Alkyl Chain Length ◽  
Au Nps ◽  
Organometallic Precursor ◽  
Gold Precursor

Gold nanoparticles (Au NPs) stabilized with six different thiolate-functionalized ionic liquids (TFILs) were synthesized in an organic solvent. The size and optical properties of the TFIL-stabilized Au NPs can be rationally controlled by altering the N-alkyl chain length and (or) the counteranion of the TFIL-stabilizing ligand. Au NPs were prepared from the reduction of a gold precursor (HAuCl4 or [Au-C≡C-t-Bu]4) employing NaBH4 in the presence of the different disulfide precursors. A model, based on Israelachvili theory, is proposed to account for the dependence of NP size on the N-alkyl chain length and the counteranion of the surfactantlike TFIL stabilizers.

Influence of amines on the size control of in situ synthesized ruthenium nanoparticles in imidazolium ionic liquids

2011 ◽  
Vol 40 (17) ◽  
pp. 4660 ◽  
Author(s):  
Gorka Salas ◽  
Catherine C. Santini ◽  
Karine Philippot ◽  
Vincent Collière ◽  
Bruno Chaudret ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Size Control ◽  
Ruthenium Nanoparticles ◽  
Imidazolium Ionic Liquids

Microwave-Assisted Synthesis of Pt Nanocrystals and Deposition on Carbon Nanotubes in Ionic Liquids

2006 ◽  
Vol 6 (1) ◽  
pp. 175-179 ◽  
Author(s):  
Zhimin Liu ◽  
Zhenyu Sun ◽  
Buxing Han ◽  
Jianling Zhang ◽  
Jun Huang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ionic Liquids ◽  
Metal Nanoparticles ◽  
Microwave Heating ◽  
Microwave Assisted Synthesis ◽  
Metal Nanocrystals ◽  
Transmission Electron ◽  
Efficient Route ◽  
Pt Nanocrystals ◽  
Means Of Transmission

In this work, a simple, fast and efficient route is presented for the metal (such as Pt, Rh, etc.) nanocrystal synthesis and deposition on carbon nanotubes (CNTs) in ionic liquids (ILs) via microwave heating. In this method, inorganic salts (such as H2PtCl6 · 4H2O, RhCl3 · 2H2O, etc.) dissolved in ILs, 1,1,3,3-tetramethylguanidinium trifluoroacetate or 1,1,3,3-tetramethylguanidinium lactate, were reduced to metal nanoparticles by glycol with the aid of microwave heating, and the produced metal nanoparticles could be decorated on CNTs in the presence of CNTs in ILs. The resulting nanomaterials were characterized by means of transmission electron microscopy and X-ray diffraction. It was demonstrated that the homogeneously dispersed Pt nanocrystals with the size of 2∼3 nm were obtained using H2PtCl6 · 4H2O as precursor, and they deposited on CNTs with the similar size when CNTs was present in ILs. This technique also can be extended to fabricate other noble metal nanocrystals (including Rh, Au, etc.) and corresponding CNT composites.

Anion and cation effects on the size control of Au nanoparticles prepared by sputter deposition in imidazolium-based ionic liquids

2016 ◽  
Vol 18 (4) ◽  
pp. 2339-2349 ◽  
Author(s):  
Yoshikiyo Hatakeyama ◽  
Ken Judai ◽  
Kei Onishi ◽  
Satoshi Takahashi ◽  
Satoshi Kimura ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Au Nanoparticles ◽  
Size Control ◽  
Sputter Deposition ◽  
Cation Effects

A conceptual diagram of the stabilization structure for AuNPs in imidazolium-based ILs.

Interfacial studies in Nb3Sn superconductors

1991 ◽  
Vol 49 ◽  
pp. 590-591
Author(s):  
Ernest L. Hall ◽  
Lee E. Rumaner ◽  
Mark G. Benz
Keyword(s):  
Grain Size ◽  
Grain Boundaries ◽  
Flux Pinning ◽  
Size Control ◽  
High Magnetic Fields ◽  
Type Ii ◽  
Reaction Interface ◽  
Liquid Diffusion ◽  
Type Ii Superconductor ◽  
Grain Size Control

The intermetallic compound Nb3Sn is a type-II superconductor of interest because it has high values of critical current density Jc in high magnetic fields. One method of forming this compound involves diffusion of Sn into Nb foil containing small amounts of Zr and O. In order to maintain high values of Jc, it is important to keep the grain size in the Nb3Sn as small as possible, since the grain boundaries act as flux-pinning sites. It has been known for many years that Zr and O were essential to grain size control in this process. In previous work, we have shown that (a) the Sn is transported to the Nb3Sn/Nb interface by liquid diffusion along grain boundaries; (b) the Zr and O form small ZrO2 particles in the Nb3Sn grains; and (c) many very small Nb3Sn grains nucleate from a single Nb grain at the reaction interface. In this paper we report the results of detailed studies of the Nb3Sn/Nb3Sn, Nb3Sn/Nb, and Nb3Sn/ZrO2 interfaces.

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