Category Physics

The highly sensitive magnetic field sensor. (Photograph: ETH Zurich / Peter Rüegg)

Researchers have succeeded in measuring tiny changes in strong magnetic fields with unprecedented precision. In their experiments, the scientists magnetised a water droplet inside an MRI scanner, a device that is used for medical imaging. They were able to detect even the tiniest variations of the magnetic field strength within the droplet. These changes were up to a trillion times smaller than the 7 tesla field strength of the MRI scanner used in the experiment.

“Until now, it was possible only to measure such small variations in weak magnetic fields,” says Klaas Prüssmann, Professor of Bioimaging at ETH Zurich and the University of Zurich...

This is an illustration of proton hopping during catalytic reaction. Credit: Waseda University

Simpler process and higher efficiency creates great expectations for consumer market. Waseda University researchers have developed a new method for producing hydrogen, which is fast, irreversible, and takes place at much lower temperature using less energy. This innovation will improve fuel cell systems for automobiles and homes. Hydrogen has normally been extracted from methane and steam using a nickel catalyst at temperatures of over 700°C. However, the high temperature creates major challenges for widespread use.

The group led by Professor Yasushi Sekine, Waseda developed a method which allows hydrogen extraction at temperatures as low as 150~200°C...

Ghost imaging ANU. Credit: ANU

ANU physicists have used ‘ghost imaging’ technique to create an image of an object from atoms that never interact with it. This is the first time that ghost imaging has been achieved using atoms, although it has previously been demonstrated with light, leading to applications being developed for imaging and remote sensing through turbulent environments.The atom-based result may lead to a new method for quality control of nanoscale manufacturing, including atomic scale 3D printing.

A/Professor Andrew Truscott said the experiment relied on correlated pairs of atoms. The pairs were separated by ~6cm and used to generate an image of the ANU logo. “One atom in each pair was directed towards a mask with the letters ‘ANU’ cut-out…...

NTU PhD Student Phillip Keane with the 3D printed drone in front of the Stratasys printer. Credit: Image courtesy of Nanyang Technological University

Researchers at NTU Singapore have 3D printed a ready-to-fly drone with embedded electronics. The electronics were incorporated in the drone during the 3D printing process which employs Stratasys ULTEMTM 9085 – a high strength, lightweight FDM material used in commercial aircrafts. The drone is jointly developed by NTU’s Singapore Centre for 3D Printing (SC3DP) and Stratasys Asia Pacific, a 3D printing and additive manufacturing company. The drone -quadcopter with 4 rotors – was designed, 3D printed and flown by Phillip Keane, PhD candidate.

Embedding electronics can be a challenge, as most will not survive the high temperatures of the 3D prin...