Feb 19, 2016 0
Fun with nanomaterials
Squeezing and Stretching Nanomaterials
Areas of intense ultrasound waves (red) alternately squeeze and stretch a thin film 100 million times a second. This squeezing and stretching takes place over a very small area – the picture is about the width of a single strand of hair.
Squeezing and stretching materials only a few atoms thick can result in dramatic changes. A non-magnet can sometimes transform to a magnet when squeezed hard enough, or a stretched superconductor can transform to a non-superconductor. We can use this to rapidly change a material between two states.
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