In a proof-of-concept study, scientists say they have successfully delivered nano-size packets of genetic code called microRNAs to treat human brain tumors implanted in mice. The contents of the super-small containers were designed to target cancer stem cells, a kind of cellular 'seed' that produces countless progeny and is a relentless barrier to ridding the brain of malignant cells.
By twisting magnetism into record-small spirals, physicists are speeding efforts to turn the digital equivalent of memory lane into a memory racetrack that could save energy and space in next-generation electronics.
When gold nano particles in water are illuminated by a laser, they get very hot: well above the boiling point of water. The formation of vapour bubbles caused by this, is well-known. New experiments, however, using a very high speed camera, now show that before this, a bubble is formed that is much larger and, subsequently, explodes violently.
Scientists have been using sound to levitate small objects for 30 years, but researchers have improved upon this container-free approach. They have found a way to enable experiments that use less material, decreasing costs and opening the door to new research.
This allows the familiar effects of quantum optics to be studied on acoustic waves and enables an alternative approach to quantum computer design, which is based on acoustics and could make quantum computers more stable and compact.