Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 48, Pages 15817-15821Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201810559
Keywords
data storage; digital materials; information-containing macromolecules; layer-by-layer; sequence-controlled polymers
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Funding
- H2020 program of the European Union [642083]
- CNRS
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A library of 16 digitally encoded polyanions was used in a layer-by-layer (LbL) polyelectrolyte assembly to nanofabricate thin films containing digitally coded strata. The polyanions were digital polyphosphodiesters (d-PPDE) prepared via an automated phosphoramidite process. Each component of the library contained 10 bytes of ASCII-encoded text (i.e. 80 coded monomers); thus the entire library allows the writing of a full sentence, which can be stored in a multilayer film as a sequence of sequences. To prepare fully segregated digital domains, non-coded layers composed of poly(allylamine hydrochloride) (PAH)/poly(sodium 4-styrenesulfonate) (PSS) were included between the d-PPDE coded layers as an intermediate barrier. Detailed analysis of the film homogeneity indicated formation of 70 nm-thick films in which digital layers are kept apart from another by non-coded interlayers. As a result, the sequence-coded polymer library could be piled-up in a defined sequence of layers.
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