Category Technology/Electronics

Flexible ultrasound patch can be stretched and twisted without compromising its electronic functions. Photo credit: Hongjie Hu

Researchers have developed a stretchable, flexible patch that could make it easier to perform ultrasound imaging on odd-shaped structures, such as engine parts, turbines, reactor pipe elbows and railroad tracks – objects that are difficult to examine using conventional ultrasound equipment. The ultrasound patch is a versatile and more convenient tool to inspect machine and building parts for defects and damage deep below the surface. A team of researchers led by engineers at the University of California San Diego published the study in the Mar. 23 issue of Science Advances.

The new device overcomes a limitation of today’s ultrasound devices, which are difficult to ...

The diamond is held inside a sapphire ring and illuminated by 532-nm green laser. The red light is fluorescence from the NV centres. Credit: Jonathan Breeze, Imperial College London

The breakthrough means masers – the microwave version of lasers – could now be used more widely in a range of applications. The maser (microwave amplification by stimulated emission of radiation), the older microwave frequency sibling of the laser, was invented in 1954. However unlike lasers, which have become widespread, masers are much less widely used because in order to function they must be cooled to temperatures close to absolute zero (-273°C).

In 2012, scientists demonstrated that a maser could operate at room temperature using the organic molecule pentacene...

A powerful new 4D printing technique could one day allow manufacturers to produce electronic devices and their wiring in a single process. Credit: H. Jerry Qi

Scientists report that they have developed a powerful new printer that could streamline the creation of self-assembling structures that can change shape after being exposed to heat and other stimuli. They say this unique technology could accelerate the use of 4D printing in aerospace, medicine and other industries. “We are on the cusp of creating a new generation of devices that could vastly expand the practical applications for 3D and 4D printing,” H. Jerry Qi, Ph.D., says. “Our prototype printer integrates many features that appear to simplify and expedite the processes used in traditional 3D printing...

NTU ground glass camera can take images in multispectrum, with potential uses in chemical sensing and food safety. Credit: Image courtesy of Nanyang Technological University

A new camera technology developed by scientists from NTU Singapore can take sharp, colour images without using a lens and colour filters. Using only a piece of ground glass and a monochrome sensor, the scientists created multi-coloured images by ‘reverse engineering’ the light that is scattered by the translucent matt surface of the ground glass, thus obtaining the original image that was projected on to it.

Since different wavelengths of light are scattered differently by the ground glass, the NTU scientists created an algorithm to reconstruct the image...