Advanced Materials

Fabricating Two-Dimensional Molecular Gradients via Asymmetric Deformation of Uniformly-Coated Elastomer Sheets


  • Supported by the Camille & Henry Dreyfus Foundation, 3 M Corporation, and the U. S. Department of Energy, Division of Materials Sciences and Division of Chemical Sciences.


Molecular gradients comprising two-dimensional in-plane variation of density of substrate-grafted molecules (see Figure, darker regions in the plot denote regions with higher substrate density) have been fabricated. This is achieved by utilizing the technology of “mechanically assembled monolayers” in conjunction with in-plane asymmetric stretching of elastomeric substrates uniformly-coated with organosilane precursors.