When we think of invisibility cloaks, probably the first things that come to mind are Harry Potter-like contraptions that allow people or large objects to instantly disappear. Scientists from the University of Maryland and nearby Towson University, however, today announced their development of something a little different – little being the key word. They have crammed 25,000 tiny “invisibility cloaks” onto a gold sheet, which itself only measures 25 millimeters per side. While the resulting biochip array may not allow any young wizards to vanish from sight, it could allow them to identify biological materials.
Although great strides have been made recently to make offices more energy efficient, fluorescent office lighting is still great cause for concern. Installing controllers which automatically switch off lighting when no movement is detected is one method of saving energy but Solaroad Technologies proposes recycling otherwise wasted light energy by placing cylindrical photovoltaic harvesting and storage devices on top of workstation cubicle walls.