Science, Space and Technology News 2024
The new technique allows scientists to see each particle that makes up colloidal crystals and to create dynamic three-dimensional models. Credit: Shihao Zang, NYUresearchers has created a new way to visualize crystals by peering inside their structures, akin to having X-ray vision.
To study crystals, many scientists, including Sacanna, look to crystals composed of minuscule spheres called colloidal particles rather than atoms. Colloidal particles are tiny—often around a micrometer in diameter, or dozens of times smaller than a human hair—but are much larger than atoms and therefore easier to see under a microscope.
A microscope alone wouldn’t allow the researchers to see inside a crystal, so they turned to an imaging technique called confocal microscopy, which uses a laser beam that scans through material to produce targeted fluorescence from the dye molecules. This reveals each two-dimensional plane of a crystal, which can be stacked on top of each other to build a three-dimensional digital model and identify the location of each particle.
In order to validate their experiments on static and dynamic crystals, the team also used computer simulations to create crystals with the same characteristics, confirming that their “Crystal Clear” method accurately captured what is inside crystals.
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