high energy particles. Photo-lithography can be applied to only polymers with photo-sensitive, but soft lithography can be applied to various polymers, like unsensitized polymers, precursor polymers, conducting polymers, etc. But, naturally, soft lithography has some drawbacks such as deformation of the elastomeric stamp of mold, density of defects in the formed pattern, and difficulty in high-re
thickness limit
Grafting from
‘‘Grafting-from’’ involves an in situ polymerization of an initiator functionalized surface with monomer.
Advantage
-can produce polymer brushes of high grafting density
-control over film thickness and composition
Limitation
-initiator surface coverage
-initiator efficiency
-rate of diffusion of monomer to active polymerization sites.
on the Taliban has been unveiled.
Called the XM-25 it has been described by the US Army as a 'game changer'.
It uses a laser guidance system and specially developed 25mm high explosive rounds which can be programmed to detonate over a target.
Richard Audette helped develop it for the US Army and says it's a big leap forward because it's the first small arms weapon to use smart technology.
Coffee
Coffee is reported to be among the most widely consumed beverages in the world.
For many people, coffee is a breakfast staple, providing a boost of energy to start the day.
Coffee is a complex chemical mixture reported to contain more than a thousand different chemicals.
Compounds in coffee may affect human health.
1. High blood pressure
Caffeine can cause a dramati
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