Nanoparticle Preparation in Room-Temperature Ionic Liquid under Vacuum Condition

Tsuda, Toshitaka; Imanishi, Akihito; Torimoto, Tsukasa; Kuwabata, Susumu

doi:10.5772/14646

Cited by 4 publications

(4 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, one could observe with the naked eye a cloud of particles located underneath the surface of the liquid. This behavior is similar to what Tsuda et al reported . These observations emphasize that the interaction between the IL surface and the sputtered metal atoms is different as compared to the situation encountered with the PEEL solution.…”

Section: Results and Discussionsupporting

confidence: 89%

“…This behavior is similar to what Tsuda et al reported. 34 These observations emphasize that the interaction between the IL surface and the sputtered metal atoms is different as compared to the situation encountered with the PEEL solution. The presence of such a high-concentration region under the surface can be explained by the fact that metal−IL molecule is rather efficient to promote a relatively rapid incorporation of the silver atoms into the liquid and that their diffusion is slow due to the rather high viscosity of the IL (viscosity = 61.14 cP).…”

Section: ■ Results and Discussionmentioning

confidence: 95%

See 1 more Smart Citation

On the Sputtering of Titanium and Silver onto Liquids, Discussing the Formation of Nanoparticles

et al. 2018

View full text Add to dashboard Cite

Titanium and silver atoms were magnetron-sputtered either onto pentaerythritol ethoxylate (PEEL) or 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (BMIMTFSI) ionic liquid (IL), and the formation of nanoparticles (NPs) is discussed based on the chemical interaction between the metal atoms and the host liquid. In the case of PEEL, our data reveal that titanium atoms sputtered in low-pressure argon plasma first form a film over the liquid surface. However, the latter dissolves as the film gets oxidized when vented to the air; asymmetric and faceted titanium dioxide NPs are finally obtained as if they were originating from a dismantled polycrystalline thin film. In the case of silver sputtered on PEEL, a film forms and solvation never occurs even after exposing the sample to air because the oxidation of silver is thermodynamically much less favorable than titanium. Quantum-chemical calculations confirm that the chemical interaction of TiO2 with PEEL molecules is favored as compared to metallic Ag or Ti. In contrast to what is observed with PEEL, when silver is sputtered onto the BMIMTFSI IL, no film is observed and spherical and crystallized silver NPs are found. These results suggest that the Ag-NP grows inside the IL because the chemical interaction of the Ag atoms with the BMIMTFSI molecules is highly favorable.

show abstract

Section: Results and Discussionsupporting

confidence: 89%

Section: ■ Results and Discussionmentioning

confidence: 95%

On the Sputtering of Titanium and Silver onto Liquids, Discussing the Formation of Nanoparticles

et al. 2018

View full text Add to dashboard Cite

show abstract

“…First-generation chloroaluminate-based RTILs usually show low viscosity and high ionic conductivity compared to the hydrophobic RTILs based on large hydrophobic anions (e.g., [TFSA] − ); , therefore, chloraluminates and halogen-based other RTILs have favorable electrochemical properties for processes like electrodeposition that stimulates researchers to continue to investigate these substances (e.g., with an eye toward developing electroplating applications) ,, despite several issues with stability and large hydrophilicity of chloroaluminate-based RTILs (many of them dangerously react with water especially at higher Lewis acidity) . It should be noted, however, that it is more difficult to prepare a high-purity hydrophilic RTIL than a hydrophobic RTIL. , …”

Section: Rtils and Some Of Their Propertiesmentioning

confidence: 99%

Ionic Liquids at Electrified Interfaces

2014

View full text Add to dashboard Cite

“…The technique of sputter deposition into liquids was first performed by Ye in 1996 after which it has been growing in interest. So far, many different materials have been produced such as Au, − Pt, − Pd, Ag, and various alloy and core shell configurations. − In order to modify and change the size of the nanoparticles, there are various methods and techniques presented in the literature, and the substrate temperature seems to be the most effective with Au nanoparticles. ,, There has been some indication that the liquid substrate temperature affects Pt nanoparticle size much less than for Au and Cu, however it is not known to what extent. As these nanoparticles are extremely useful catalysts, it would be helpful to tailor their size for the relevant application …”

Section: Introductionmentioning

confidence: 99%

Plasma-Induced Heating Effects on Platinum Nanoparticle Size During Sputter Deposition Synthesis in Polymer and Ionic Liquid Substrates

et al. 2021

View full text Add to dashboard Cite

Nanoparticle catalyst materials are becoming ever more important in a sustainable future. Specifically, platinum (Pt) nanoparticles have relevance in catalysis, in particular, fuel cell technologies. Sputter deposition into liquid substrates has been shown to produce nanoparticles without the presence of air and other contaminants and the need for precursors. Here, we produce Pt nanoparticles in three imidazolium-based ionic liquids and PEG 600. All Pt nanoparticles are crystalline and around 2 nm in diameter. We show that while temperature has an effect on particle size for Pt, it is not as great as for other materials. Sputtering power, time, and postheat treatment all show slight influence on the particle size, indicating the importance of temperature during sputtering. The temperature of the liquid substrate is measured and reaches over 150 °C during deposition which is found to increase the particle size by less than 20%, which is small compared to the effect of temperature on Au nanoparticles presented in the literature. High temperatures during Pt sputtering are beneficial for increasing Pt nanoparticle size beyond 2 nm. Better temperature control would allow for more control over the particle size in the future.

show abstract

Nanoparticle Preparation in Room-Temperature Ionic Liquid under Vacuum Condition

Cited by 4 publications

References 42 publications

On the Sputtering of Titanium and Silver onto Liquids, Discussing the Formation of Nanoparticles

On the Sputtering of Titanium and Silver onto Liquids, Discussing the Formation of Nanoparticles

Ionic Liquids at Electrified Interfaces

Plasma-Induced Heating Effects on Platinum Nanoparticle Size During Sputter Deposition Synthesis in Polymer and Ionic Liquid Substrates

Contact Info

Product

Resources

About