In an advance toward glass that remains clear under the harshest of conditions, scientists are reporting development of a new water-repellant coating that resists both fogging and frosting. Their research on the coating, which could have uses ranging from automobile windshields to camera lenses, appears in the journal ACS Nano.
Michael F. Rubner, Robert E. Cohen and colleagues point out that anti-fogging coatings that absorb water have been the focus of attention lately because of their ability to reduce light scattering and the resultant distortion caused by condensation. However, under extreme fogging conditions, these surfaces may frost and become foggy. They set out to make a better coating to withstand the aggressive conditions.
Their report describes development and testing of a new coating that rapidly absorbs water molecules that cannot freeze in the coating. At the same time, the coating has a water-repelling or hydrophobic effect to larger water droplets. The hydrophobic character means that water droplets do not spread extensively on the coating but essentially remain as flattened droplets.
When it comes to even the most advanced materials, the adage "if it does not bend, it breaks" is often true. But before that final snap, most materials experience microscopic damage that could be fixed -- but only if you know it's there. In a study researchers introduce a new technique that ... more
Hydrogen is widely regarded as a promising and clean alternative energy source. The traditional source of hydrogen (H2) for fuel cell use is water, which is split into H2 and oxygen (O2). But O2 is a low-value product. So, this week in ACS Central Science, researchers report a new approach ... more
Many chemists are familiar with taking trips to the espresso machine while running late-night experiments, but until now these excursions were merely undertaken for the caffeine boost. A group recently reported however, that espresso machines can quickly and inexpensively perform some compl ... more
Out in the open air on a beautiful summer day, most people don’t realize that they’re bathing in the world's most common carcinogen – the sun's rays. Ultra violet (UV) rays to be exact. Let’s take a look at how UV rays affect your body, and the sorts of built-in chemical defense systems you ... more
Have you ever wondered about what makes a fluorescent color stand out so brightly from the rest? Today we’re digging into what makes them pop, and we’re going highlight some of the brilliant applications of fluorescence coming out of nanotechnology. more