Solid or liquid? Solidification of a nanoconfined liquid under nonequilibrium conditions

Download

index.pdf

Date

2006-07-18

Author

Patil, Shivprasad
MATEİ, George
Oral, Ahmet
Hoffmann, Peter M.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

41
views

0
downloads

There has been a long-standing debate about the physical state and possible phase transformations of confined liquids. In this report, we show that a model-confined liquid can behave both as a Newtonian liquid with very little change in its dynamics and as a pseudosolid, depending solely on the rate of approach of the confining surfaces. Thus, the confined liquid does not exhibit any confinement-induced solidification in thermodynamic equilibrium. Instead, solidification is induced kinetically when the two confining surfaces are approached with a minimum critical rate. This critical rate is surprisingly slow (on the order of 6 angstrom/s), explaining the frequent observation of confinement-induced solidification.

Subject Keywords

Spectroscopy, Electrochemistry, General Materials Science, Surfaces and Interfaces, Condensed Matter Physics

URI

https://hdl.handle.net/11511/37504

Journal

LANGMUIR

DOI

https://doi.org/10.1021/la060504w

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Active Janus Particles at Interfaces of Liquid Crystals Mangal, Rahul; Nayani, Karthik; Kim, Young-Ki; Büküşoğlu, Emre; Cordova-Figueroa, Ubaldo M.; Abbott, Nicholas. L. (American Chemical Society (ACS), 2017-10-17) We report an investigation of the active motion of silica palladium Janus particles (JPs) adsorbed at interfaces formed between nematic liquid crystals (LCs) and aqueous phases containing hydrogen peroxide (H2O2). In comparison to isotropic oil aqueous interfaces, we observe the elasticity and anisotropic viscosity of the nematic phase to change qualitatively the active motion of the JPs at the LC interfaces. Although contact line pinning on the surface of the JPs is observed. to restrict out-of-plane rotat...
Encapsulated Hydrogels by E-beam Lithography and Their Use in Enzyme Cascade Reactions Mancini, Rock J.; Paluck, Samantha J.; Bat, Erhan; Maynard, Heather D. (American Chemical Society (ACS), 2016-04-26) Electron beam (e-beam) lithography was employed to prepare one protein immobilized hydrogel encapsulated inside another by first fabricating protein-reactive hydrogels of orthogonal reactivity and subsequently conjugating the biomolecules. Exposure of thin films of eight arm star poly(ethylene glycol) (PEG) functionalized with biotin (Biotin PEG), alkyne (Alkyne-PEG) or aminooxy (AO-PEG) end groups to e-beam radiation resulted in cross-linked hydrogels with the respective functionality. It was determined vi...
Palladium(0) Nanoparticle Formation, Stabilization, and Mechanistic Studies: Pd(acac)(2) as a Preferred Precursor, [Bu4N](2)HPO4 Stabilizer, plus the Stoichiometry, Kinetics, and Minimal, Four-Step Mechanism of the Palladium Nanoparticle Formation and Subsequent Agglomeration Reactions Özkar, Saim (American Chemical Society (ACS), 2016-04-19) Palladium(0) nanoparticles continue to be important in the field of catalysis. However, and despite the many prior reports of Pd(0)(n) nanoparticles,, missing is a study that reports the kinetically controlled formation of Pd(0)(n) nanoparticles with the simple stabilizer [Bu4N](2)HPO4 in an established, balanced formation reaction where the kinetics and mechanism of the nanoparticle-formation reaction are also provided. It is just such studies that are the focus of the present work. Specifically, the prese...
In Situ Formed "Weakly Ligated/Labile Ligand" Iridium(0) Nanoparticles and Aggregates as Catalysts for the Complete Hydrogenation of Neat Benzene at Room Temperature and Mild Pressures Bayram, Ercan; Zahmakiran, Mehmet; Özkar, Saim; Finke, Richard G. (American Chemical Society (ACS), 2010-07-20) "Weakly ligated/labile ligand" nanoparticles, that is nanoparticles where only weakly coordinated ligands plus the desired catalytic reactants are present, are of fundamental interest. Described herein is a catalyst system for benzene hydrogenation to cyclohexane consisting of "weakly ligated/labile ligand" Ir(0) nanoparticles and aggregates plus dry-HCl formed formed in situ from commercially available [(1,5-COD)IrCl](2) plus 40 +/- 1 psig (similar to 2.7 atm) H(2) at 22 +/- 0.1 degrees C. Multiple control...
Conducting polymers of decanedioic acid bis-(4-pyrrol-1-yl-phenyl) ester Çırpan, Ali; Toppare, Levent Kamil (Elsevier BV, 2004-05-15) A dipyrrolyl monomer was synthesized via the reaction between 4-pyrrol-1-yl phenol and decanedioyl dichloride. The electrochemical behavior of this monomer was studied. Polymerization of decanedioic acid bis-(4-pyrrol-1-yi-phenyl) ester (DAPE) was achieved by chemical and constant current electrolyses methods. Copolymerization of DAPE with thiophene was performed by constant potential electrolysis in acetonitrile-tetrabutylammonium tetrafluoroborate (TBAFB), dichloromethane-TBAFB, solvent-electrolyte couple...

Citation Formats

S. Patil, G. MATEİ, A. Oral, and P. M. Hoffmann, “Solid or liquid? Solidification of a nanoconfined liquid under nonequilibrium conditions,” LANGMUIR, pp. 6485–6488, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37504.