Scientists from the Department of Energy’s Lawrence Berkeley National Laboratory, California, US, have designed a method in which semiconducting materials have been turned into quantum machines.
This work could revolutionise the field, and lead to new efficient electronic systems and exciting physics.
Quantum machines are generally made from two-dimensional (2D) materials – often graphene. These materials are one atom thick and can be stacked. When the materials form a repeating pattern, this can generate unique properties.
Studies with graphene have resulted in large advancements in the field of 2D materials. A new study has found a way to use two semiconducting materials – tungsten disulphide and tungsten diselenide – to develop a material with highly interacting electrons.
The researchers determined that the ‘twist angle’ – the angle between the two layers – provides the key to turning a 2D system into a quantum material.
Dr Gary Harris talks about radio technology to quantum materials. Source: TEDx Talks
‘This is an amazing discovery because we didn’t think of these semiconducting materials as strongly interacting,’ said Feng Wang, Professor of Physics at UC Berkeley. ‘Now this work has brought these seemingly ordinary semiconductors into the quantum materials space.’
Tracking pollen can help scientists better understand pollinator behaviour.
Pollination and pollination services are key for productive farming. In fact, many farms actively manage pollination, bringing in bees or planting effective field margins.
Fluorescent quantum dots on a bee show the distribution of the marked pollen. Image: Corneile Minnaar
Despite the importance of pollination, for many years research has been limited as there is no efficient way to study pollen distribution or track individual pollen grains.
Scientists at the university have developed an innovative method to track pollen using quantum dots.
Tracking pollen with quantum dots. Source: Stellenbosch University
Quantum dots are nanocrystals that emit bright fluorescent light when exposed to UV light. The quantum dots were equipped with lipophilic (fat-loving) ligands to allow them to stick to the fatty outer layer of pollen grains. The fluorescent colour of the quantum dots can then be used to track any pollen they have adhered to.