![Structural snapshot. (Image by the Salk Institute.)](https://sandbox4-www.anl.gov/sites/www/files/styles/article_teaser_16x9/public/2021-06/16x9_Hunter-PNAS-release-imagex.jpg?h=8abcec71&itok=9yqhhHNH)
3D printing has been used to print an extremely thin layers of material in a pattern with specifically designed wells to hold and immobilize crystals. These wells can vary in size and shape which increases the flexibility of this invention for use in different experimental modes. A key benefit for this invention is the ability to print a mesh directly onto mylar or other sealing materials.