Orthogonal Images Concealed Within a Responsive 6-Dimensional Hypersurface

Yerzhan S. Zholdassov, Daniel J. Valles, Samiha Uddin, Joanna Korpanty, Nathan C. Gianneschi, Adam B. Braunschweig*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


A photochemical printer, equipped with a digital micromirror device (DMD), leads to the rapid elucidation of the kinetics of the surface-initiated atom-transfer radical photopolymerization of N,N-dimethylacrylamide (DMA) and N-isopropylacrylamide (NIPAM) monomers. This effort reveals conditions where polymer brushes of identical heights can be grown from each monomer. With these data, hidden images are created that appear upon heating the substrate above the lower critical solution temperature (LCST) of polyNIPAM. By introducing a third monomer, methacryloxyethyl thiocarbamoyl rhodamine B, a second, orthogonal image appears upon UV-irradiation. With these studies, it is shown how a new photochemical printer accelerates discovery, creates arbitrary patterns, and addresses long-standing problems in brush polymer and surface chemistry. With this technology in hand a new method is demonstrated to encrypt data within hypersurfaces.

Original languageEnglish (US)
Article number2100803
JournalAdvanced Materials
Issue number21
StatePublished - May 27 2021


  • atom-transfer radical photopolymerization
  • hypersurfaces
  • photolithography
  • polymer brushes
  • stimuli-responsive systems

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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