Size-dependent behavior and failure of young’s equation for wetting of two-component nanodroplets

We have investigated the surface effect of colloidally prepared CdSe nanocrystals (NCs) with the size range of 23-40 Å on their structural properties by changing the organic capping ligands. The TOPO/HDA-passivated NCs reveal a size-dependent behavior involving an elongated axial bondR(1)of an atomic tetrahedron and a shrunken equatorial bondsR(2). After treatment of the NCs with pyridine, the bond lengthR(1)decreases significantly whereasR(2)remains unchanged relative to the TOPO/HDA-passivated NCs, suggesting that a tensile stress along the [001] direction is contributed from the surface modification. In addition, we find that the expansion ratio of the pyridine-treated NCs along the c axis depends strongly on the density of stacking faults, which provides an evidence for the relaxation of atomic positions near the interface of stacking faults.

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Phase diagram of Ag–Pd bimetallic nanoclusters by molecular dynamics simulations: solid-to-liquid transition and size-dependent behavior

Physical Chemistry Chemical Physics ◽

10.1039/b821227a ◽

2009 ◽

Vol 11 (25) ◽

pp. 5079 ◽

Cited By ~ 35

Author(s):

Da Hye Kim ◽

Hyun You Kim ◽

Ji Hoon Ryu ◽

Hyuck Mo Lee

Keyword(s):

Molecular Dynamics ◽

Phase Diagram ◽

Molecular Dynamics Simulations ◽

Size Dependent ◽

Bimetallic Nanoclusters ◽

Dependent Behavior ◽

Liquid Transition ◽

Dynamics Simulations

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Size-dependent behavior of polymer solar cells measured under partial illumination

Solar Energy Materials and Solar Cells ◽

10.1016/j.solmat.2011.08.012 ◽

2011 ◽

Vol 95 (12) ◽

pp. 3516-3519 ◽

Cited By ~ 8

Author(s):

Dong Gao ◽

Dwight S. Seferos

Keyword(s):

Solar Cells ◽

Polymer Solar Cells ◽

Size Dependent ◽

Dependent Behavior

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Hydrophobic Biomimetic Nanoparticles drives Size-dependent Remodelling in Asymmetric Bilayers

10.26434/chemrxiv.11952222.v3 ◽

2020 ◽

Author(s):

Sang Noh ◽

Rebecca Notman

Keyword(s):

Membrane Structure ◽

Phase Interface ◽

Line Tension ◽

Size Dependent ◽

Membrane Fission ◽

Micelle Structure ◽

Two Component ◽

Biomimetic Nanoparticles ◽

The Subject ◽

Mixed Bilayer

The interactions between heterogeneous components in a biomimetic bilayer can control its physical properties such as its rigidity, local and bulk curvature and propensity towards phenomena such as membrane fission and fusion. In particular, nanoparticles (NPs) have been subjects of intense interest due to their similar scale to the bilayer width and its ability to affect local membrane structure. Generally, it is understood that hydrophobic components are energetically favoured to adsorb within the hydrophobic interior of a biomimetic bilayer. However, how such NPs interact in the presence of heterogeneous aggregates in the bilayer has been the subject of much debate. To better understand the effects of the integration of nanoscale components on heterogeneous mixed bilayer, we have simulated a series of generic hydrophobic NPs interacting with a phase-separating two-component surfactant bilayer. We find that the hydrophobic NP tends to aggregate at the phase interface, acting as a line tension relaxant i.e. a lineactant on the phase separated interface, which results in a variety of demixing behavior. We demonstrate that depending on the size of the NP, the localized softening of surfactants and the formation of a mixing gradient of surfactants can drive the a cap/bud formation around the NP, as well as the formation of a NP-micelle structure<br>

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Thermo-Mechanical and Size-Dependent Behavior of Freestanding AuAg and Nanoporous-Au Beams

MRS Proceedings ◽

10.1557/proc-976-0976-ee06-09 ◽

2006 ◽

Vol 976 ◽

Author(s):

Erkin Seker ◽

Jianzhong Zhu ◽

Hilary Bart-Smith ◽

Matthew Begley ◽

Robert Kelly ◽

...

Keyword(s):

Thermal Treatment ◽

Mechanical Characterization ◽

Tensile Failure ◽

Porosity Evolution ◽

Size Dependent ◽

Dependent Behavior ◽

Low Elastic Modulus ◽

Chemical Inertness ◽

Percentage Yield ◽

Significant Effort

AbstractNanoporous gold (np-Au), produced by selectively removing silver from an AuAg alloy, has recently gained considerable attention from the scientific community. Biocompatibility, chemical inertness, increased surface area, relatively low elastic modulus, and ease of synthesis make np-Au an important candidate for biomedical, catalytic, and MEMS applications. Np-Au films also offer substantial ground for theoretical and empirical research, including mechanical characterization, fracture mechanics, and porosity evolution. Even though a significant effort has been directed towards exploring blanket np-Au films (i.e., foils, strips), to our knowledge no work has been done on fabricating or investigating freestanding np-Au structures (i.e., micro-beams, cantilevers). Recently we have developed techniques to create freestanding clamped np-Au beams with widths from 5 to 40 microns and lengths from 20 to 500 microns. The percentage yield was more than 97% for 2880 beams on a 2-inch wafer. A critical step in the fabrication process, necessary to prevent tensile failure of the beams during dealloying, is a thermal heat treatment prior to dealloying. The study of thermal treatment of beams at temperatures between 100°C and 600°C prior to dealloying revealed three distinct beam behavior regimes, namely quasi-elastic buckling, plastic buckling, and material interdiffusion. This paper will present the preliminary results from thermal treatment experiments particularly focusing on how beam dimensions affect percentage yield and beam fracture.

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