Block Copolymer (15774427462)

Transmission electron microscope (TEM) tomography provides a nanoscale, 3D visualization of the structure of a templated block copolymer. The purple features are silica posts fabricated by electron-beam lithography that direct the self-assembly of the copolymer. The material self-assembles to form two orthogonal layers of cylinders (green).
See also www.nist.gov/mml/msed/bcp-102214.cfm
Credit: Winterstein/NIST
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