A team of Foundry users has created a new type of inorganic crystal that uses the Eshelby twist to form large-scale helical spirals.
Significance and Impact
This is the first time that 2D materials have been synthesized to form a continuously twisting shape in a structure that is thousands or millions of layers thick. The spiral structures could hold unique properties, including superconductivity, that aren’t observed in regularly stacked materials.
- The spiral structures are made of stacked layers of germanium sulfide nanosheets. The researchers used a crystal defect, called the Eshelby Twist, that gives the crystal structure a bit of a twisting force.
- By adjusting the material synthesis conditions and length, the researchers could change the angle between the layers, creating tight or loose structures.
- The research team worked with Foundry staff to characterize the twist angles and measure the crystal’s optical properties.