Bioinspired Tip-Guidance Liquid Jetting and Droplet Emission at a Rotary Disk via a Surface Energy Gradient

ACS Nano ◽  
2019 ◽  
Vol 13 (11) ◽  
pp. 13100-13108 ◽  
Author(s):  
Ting Wang ◽  
Yifan Si ◽  
Ning Li ◽  
Zhichao Dong ◽  
Lei Jiang
Keyword(s):  
Surface Energy ◽  
Energy Gradient ◽  
Rotary Disk

Condensation on Surface Energy Gradient Shifts Drop Size Distribution toward Small Drops

Langmuir ◽  
2014 ◽  
Vol 30 (7) ◽  
pp. 1788-1798 ◽  
Author(s):  
Ashley M. Macner ◽  
Susan Daniel ◽  
Paul H. Steen
Keyword(s):  
Surface Energy ◽  
Size Distribution ◽  
Drop Size ◽  
Drop Size Distribution ◽  
Energy Gradient

Surface energy gradient driven convection for generating nanoscale and microscale patterned polymer films using photosensitizers

2014 ◽  
Vol 52 (18) ◽  
pp. 1195-1202 ◽  
Author(s):  
Chae Bin Kim ◽  
Dustin W. Janes ◽  
Dana L. McGuffin ◽  
Christopher J. Ellison
Keyword(s):  
Surface Energy ◽  
Polymer Films ◽  
Energy Gradient

scholarly journals Unidirectional motion of a water nanodroplet subjected to a surface energy gradient

2012 ◽  
Vol 85 (5) ◽  
Author(s):  
Jianlong Kou ◽  
Maofei Mei ◽  
Hangjun Lu ◽  
Fengmin Wu ◽  
Jintu Fan
Keyword(s):  
Surface Energy ◽  
Energy Gradient ◽  
Unidirectional Motion

Fabrication of Surface Energy Gradients Using Self-Assembled Monolayer Surfaces Prepared by Photodegradation

2011 ◽  
Vol 688 ◽  
pp. 102-106 ◽  
Author(s):  
Chang Song Liu ◽  
Dong Mei Zheng ◽  
Ji Gen Zhou ◽  
Yong Wan ◽  
Zhi Wen Li
Keyword(s):  
Surface Energy ◽  
Water Droplet ◽  
Chemical Vapor ◽  
Self Assembled Monolayers ◽  
Self Assembled Monolayer ◽  
Si Substrates ◽  
Energy Gradient ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
A New Technique

A new technique, direct photodegradation of self-assembled monolayers (SAM), to obtain surface energy gradients on Si substrates was demonstrated. The gradient surface, with hydrophobic to hydrophilic gradients, was prepared by two steps: Firstly, a homogeneous fluoroalkylsilane SAM film was deposited by a chemical vapor deposition on a Si substrate. Secondly, a controlled photodegradation technique was directly applied to the homogeneous FAS-SAM surface. The surface energy gradient was then obtained due to the different intensity of photoirradiation in the different positions along the photodegraded path on the SAM surfaces. The resulting surface displayed a gradient of wettability (with the contact angle of water changing from 55° to 18°) over a distance of 4.2 mm. The water droplet was driven by surface energy gradient and spontaneously moved from the hydrophobic to hydrophilic surface. During the moving process, the water droplet accelerated firstly and then decelerated. The peak velocity was about 23.3 mm/s. The velocity is dependent on the gradient of the surface energy.

Generating Large Thermally Stable Marangoni-Driven Topography in Polymer Films by Stabilizing the Surface Energy Gradient

2017 ◽  
Vol 50 (11) ◽  
pp. 4588-4596 ◽  
Author(s):  
Amanda R. Jones ◽  
Chae Bin Kim ◽  
Sunshine X. Zhou ◽  
Heonjoo Ha ◽  
Reika Katsumata ◽  
...  
Keyword(s):  
Surface Energy ◽  
Polymer Films ◽  
Thermally Stable ◽  
Energy Gradient

The annealed (0001) α-alumina surface and its influence on thin-film growth

1995 ◽  
Vol 53 ◽  
pp. 336-337
Author(s):  
Michael W. Bench ◽  
Paul G. Kotula ◽  
C. Barry Carter
Keyword(s):  
Electron Microscopy ◽  
Surface Energy ◽  
Film Growth ◽  
Thin Film Growth ◽  
Energy Calculations ◽  
Transmission Electron ◽  
Reflection Electron Microscopy ◽  
Low Energy Electron ◽  
Surface Nature

The growth of semiconductors, superconductors, metals, and other insulators has been investigated using alumina substrates in a variety of orientations. The surface state of the alumina (for example surface reconstruction and step nature) can be expected to affect the growth nature and quality of the epilayers. As such, the surface nature has been studied using a number of techniques including low energy electron diffraction (LEED), reflection electron microscopy (REM), transmission electron microscopy (TEM), molecular dynamics computer simulations, and also by theoretical surface energy calculations. In the (0001) orientation, the bulk alumina lattice can be thought of as a layered structure with A1-A1-O stacking. This gives three possible terminations of the bulk alumina lattice, with theoretical surface energy calculations suggesting that termination should occur between the Al layers. Thus, the lattice often has been described as being made up of layers of (Al-O-Al) unit stacking sequences. There is a 180° rotation in the surface symmetry of successive layers and a total of six layers are required to form the alumina unit cell.

The nucleation of cavities at grain boundaries

1987 ◽  
Vol 45 ◽  
pp. 288-291
Author(s):  
P. J. Goodhew
Keyword(s):  
Surface Tension ◽  
Surface Energy ◽  
Grain Boundaries ◽  
Radiation Damage ◽  
Impurity Concentration ◽  
Driving Force ◽  
Nucleation And Growth ◽  
Phase Boundaries ◽  
Cavity Nucleation ◽  
Spherical Bubble

Cavity nucleation and growth at grain and phase boundaries is of concern because it can lead to failure during creep and can lead to embrittlement as a result of radiation damage. Two major types of cavity are usually distinguished: The term bubble is applied to a cavity which contains gas at a pressure which is at least sufficient to support the surface tension (2g/r for a spherical bubble of radius r and surface energy g). The term void is generally applied to any cavity which contains less gas than this, but is not necessarily empty of gas. A void would therefore tend to shrink in the absence of any imposed driving force for growth, whereas a bubble would be stable or would tend to grow. It is widely considered that cavity nucleation always requires the presence of one or more gas atoms. However since it is extremely difficult to prepare experimental materials with a gas impurity concentration lower than their eventual cavity concentration there is little to be gained by debating this point.

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