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Materials Science

Just a Phase

The patterns seen here are called interference rings, or Newton’s rings, and are generated when light waves reflect off of two glass surfaces that are in very close proximity to each other, such as a glass microscope slide and a cover slip. Imperfections…

The Light of Elendil in Shelob's Lair

By Andrew Wong, a second year graduate student in the Applied Physics program at Harvard University.       The increase in global energy demand and subsequent carbon dioxide emissions has driven advancements in renewable energy generation technologies…

Algae: Applications in Removing Arsenic and Beyond

A 5000x magnification view of diatoms, a type of tiny algae. (Credit: from Jim Mikulak (The English Wikipedia) via Wikimedia Commons.) Scientists at Zhejiang University have recently published an improved method for removing arsenic from drinking water,…

Why the blue LED should light up your life (and won a Nobel Prize)

What do you think of when you hear the phrase ‘green technology’? Do solar panels, wind turbines, and electric cars come to mind? What about light-emitting diodes (LEDs)? Unlike many costly green technologies, LEDs are accessible to the majority of…

Cash Register Receipts and Clean Hands

Bisphenol A (BPA) is a chemical compound that has been used in the production of plastics, including cell phones, contact lenses, and food storage containers, for over 50 years. Scientists have recently shown that the BPA found on cash register receipts…

3D Printing – Why all the hype?

3D printer making a small building. Image credit: Tiia Monto, http://commons.wikimedia.org/wiki/File:3D_printer2.jpg In recent years, 3D printing has drawn a lot of attention to itself with breakthroughs in various industrial applications.  Given the…

Diatoms: Nature’s nanotechnologists

Microscopy images above show two model diatom species: Thalassiosira pseudonana (left) and Phaeodactylum tricornutum (right). If you live in Boston, nanofactories of sophistication well beyond anything the human race has come up with are just a Charles…