Zholdassov Yerzhan S, Valles Daniel J, Uddin Samiha, Korpanty Joanna, Gianneschi Nathan C, Braunschweig Adam B
The Advanced Science Research Center at the Graduate Center of the City University of the New York, 85 St. Nicholas Terrace, New York, NY, 10031, USA.
Department of Chemistry, Hunter College, 695 Park Avenue, New York, NY, 10065, USA.
Adv Mater. 2021 May;33(21):e2100803. doi: 10.1002/adma.202100803. Epub 2021 Apr 19.
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.
配备数字微镜器件（DMD）的光化学打印机，能够快速阐明N，N - 二甲基丙烯酰胺（DMA）和N - 异丙基丙烯酰胺（NIPAM）单体的表面引发原子转移自由基光聚合动力学。这项工作揭示了可以从每种单体生长出相同高度聚合物刷的条件。利用这些数据，创建了隐藏图像，当将基板加热到聚NIPAM的低临界溶液温度（LCST）以上时，这些图像就会出现。通过引入第三种单体甲基丙烯酰氧乙基硫代氨基甲酰罗丹明B，在紫外线照射时会出现第二个正交图像。通过这些研究，展示了一种新型光化学打印机如何加速发现、创建任意图案并解决刷状聚合物和表面化学中的长期问题。掌握这项技术后，展示了一种在超表面内加密数据的新方法。
