Results 191 to 200 of about 6,422 (223)

Nanoconfined Polyelectrolyte Multilayers

Advanced Materials, 2006
Lateral nanometer-scale control over the growth of polyelectrolyte (layer-by-layer) multilayers is demonstrated down to 40 nm, which is well below the natural size of the macromolecules in solution. Because of confinement upon adsorption, the molecules change conformation as compared with the usual, macroscopic case (see Figure). This work opens direct
A. Pallandre, A. Moussa, B. Nysten, A. M. Jonas   +3 more
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Thermodiffusion of ions in nanoconfined aqueous electrolytes

Journal of Colloid and Interface Science, 2022
Understanding of thermal effects on ion transport in porous media is very important for environmental applications. The movement of ions along a temperature gradient is named thermophoresis or thermodiffusion. In nanoporous media, where the interaction of ions with solid-liquid interfaces has a significant influence on their migration, the theoretical ...
Yang, Yuankai, Zhang, Xudong, Tian, Zhiguo, Deissmann, Guido, Bosbach, Dirk, Liang, Peng, Wang, Moran   +6 more
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Dynamics of Nanoconfined Supercooled Liquids

Annual Review of Physical Chemistry, 2011
Near their glass transition temperature Tg, supercooled liquids display dramatic changes regarding the dynamics if subject to geometrical restrictions on the scale of 2 to 200 nm. Confinement-induced shifts of Tg of 25 K have been reported, equivalent to relaxation times that differ by several orders of magnitude compared with the bulk liquid at the ...
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Nanoconfined Lanthanum Hydride Nanoconfinement in Functionalized Carbon Hosts

ECS Meeting Abstracts
Metal hydrides with a high hydrogen content have long been considered for materials-based hydrogen storage and but are now attracting attention as potential high-temperature superconductors.1 Recently, we showed that cryo-milling lanthanum improves hydrogen diffusion, yielding a higher hydrogen-to-metal ratio of lanthanum hydride up to LaH4.2 ...
Mohana Shivanna, Timoth Elmslie, Sakun Duwal, Catalin Spataru, Zak Piontkowski, Joseph Teprovich, Mark D. Allendorf, Peter Sharma, Vitalie Stavila   +8 more
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Dielectric properties of nanoconfined water

The Journal of Chemical Physics
The dielectric function of a dipolar liquid exhibits a strong wavenumber dependence in the bulk homogeneous state. Such a behavior seems to suggest the possibility of a strong system size dependence of the dielectric constant (DC) of a nanoconfined liquid, although details have been revealed only recently.
Sayantan Mondal, Biman Bagchi
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Ultralow Percolation Threshold in Nanoconfined Domains

ACS Nano, 2017
Self-assembled percolated networks play an important role in many advanced electronic materials and devices. In nanocarbon composites, decreasing the percolation threshold ϕc is of paramount importance to reduce nanotube bundling, minimize material resources and costs, and enhance charge transport.
David R. Barbero, Nicolas Boulanger
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Intramolecular and Intermolecular Rearrangements in Nanoconfined Polystyrene

Macromolecules, 2007
Vacuum ultraviolet spectroscopy reveals an intramolecular rearrangement involving a change in 'physical dimers' of adjacent pendant benzene rings of atactic polystyrene (aPS) from 'oblique' to 'head-to-tail' (ht) configuration in aPS films spin coated on fused quartz, as film thickness R goes below 4R(g) (R-g = unperturbed polystyrene gyration radius ...
Chattopadhyay S, Datta A, Giglia A, Mahne N, Das A, Nannarone S   +5 more
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Water DynamicsThe Effects of Ions and Nanoconfinement

The Journal of Physical Chemistry B, 2008
Hydrogen bond dynamics of water in highly concentrated NaBr salt solutions and reverse micelles are studied using ultrafast 2D-IR vibrational echo spectroscopy and polarization-selective IR pump-probe experiments performed on the OD hydroxyl stretch of dilute HOD in H(2)O.
Sungnam, Park, David E, Moilanen, M D, Fayer   +2 more
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Uniaxial Alignment of Nanoconfined Columnar Mesophases

Nano Letters, 2007
By confining discotic phthalocyanines in a network of crisscrossed nanogrooves, we obtain a uniaxial alignment of the columnar mesophase. The alignment process is based on the anisotropy of interface tension between the mesophase and the nanogrooves' walls.
Mouthuy, Pierre-Olivier, Melinte, Sorin, Geerts, Yves, Jonas, Alain M   +3 more
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Nanoconfinement effects in energy storage materials

Physical Chemistry Chemical Physics, 2011
Nanoconfinement effects have been studied to understand and to modify thermodynamic and kinetic properties of energy storage materials and to improve their cyclic behaviour. The paper addresses various aspects in the research and development of hydrogen storage materials and batteries.
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