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Title          
Superhydrophobic Surface Technology 
   
 
Abstract
This technology can be used to create icing resistant surfaces on airplane wings, toilets that stay clean by themselves, zero rust surfaces and many more. It is a superhydrophobic material developed by Prof Chunlei Guo, professor of optics at University of Rochester and his team. Using laser to etch an unique pattern of surface structures at micro and nano scales the surface of materials is rendered hydrophobic. Unlike the conventional approach of chemical coating to make surfaces hydrophobic this approach gives much stronger hydrophobia and doesn\'t come with the risk of peeling off. The materials Guo has created are much more slippery than Teflon. The article, “Multifunctional surfaces produced by femtosecond laser pulses,” was published in the Journal of Applied Physics on January 20, 2015 (DOI: 10.1063/1.4905616). It can be accessed at: http://scitation.aip.org/content/aip/journal/jap/117/3/10.1063/1.4905616
 
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Added By - A Ghosh
Subject - Material Science and Engineering
Document Type - Demonstration
Video Duration - moderate
 
 
 

 

Title          
Introduction to Plasma 
   
 
Abstract
Amazing things plasma can do by Michael Sweatt and Bobby Bruce
 
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Added By - eternes
Subject - Material Science and Engineering
Document Type - Vid/Terp 2008 www.umd.edu
Video Duration - 00:02:57
 
 
 

 

Title          
Amazing Liquid 
   
 
Abstract
A non-Newtonian fluid is a fluid in which the viscosity changes with the applied strain rate. As a result, non-Newtonian fluids may not have a well-defined viscosity.

Although the concept of viscosity is commonly used to characterize a material, it can be inadequate to describe the mechanical behavior of a substance, particularly non-Newtonian fluids. They are best studied through several other rheological properties which relate the relations between the stress and strain tensors under many different flow conditions, such as oscillatory shear, or extensional flow which are measured using different devices or rheometers. The rheological properties are better studied using tensor-valued constitutive equations, which are common in the field of continuum mechanics.

An inexpensive, non-toxic sample of a non-Newtonian fluid sometimes known as oobleck can be made very easily by adding corn starch (cornflour) to a cup of water. Add the starch in small portions and stir it in slowly. When the suspension nears the critical concentration - becoming like single cream (light cream) in consistency - the so called "shear thickening" property of this non-Newtonian fluid becomes apparent. The application of force - f...
 
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Added By - 123
Subject - Material Science and Engineering
Document Type - Demonstration
Video Duration - 00:00:02
 
 
 

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