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Orthogonal Images Concealed Within a Responsive 6‐Dimensional Hypersurface
Author(s) -
Zholdassov Yerzhan S.,
Valles Daniel J.,
Uddin Samiha,
Korpanty Joanna,
Gianneschi Nathan C.,
Braunschweig Adam B.
Publication year - 2021
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202100803
Subject(s) - monomer , materials science , photopolymer , lower critical solution temperature , substrate (aquarium) , polymer , photochemistry , digital micromirror device , hypersurface , rhodamine b , kinetics , polymer chemistry , nanotechnology , composite material , chemistry , catalysis , physics , organic chemistry , mathematical analysis , oceanography , mathematics , photocatalysis , quantum mechanics , copolymer , geology
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.