4.7 Review

Photopolymerization and Photostructuring of Molecularly Imprinted Polymers

Journal

ACS APPLIED POLYMER MATERIALS
Volume 3, Issue 10, Pages 4769-4790

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsapm.1c00661

Keywords

molecularly imprinted polymers; photopolymerization; photostructuring; mask lithography; maskless lithography; stereolithography; microstructures; nanostructures

Funding

  1. Hauts-de-France Region
  2. European Regional Development Fund (ERDF) [CPER 20142020]
  3. Embassy of France in the Philippines
  4. Commission on Higher Education of the Philippines (CHED)
  5. Institut Universitaire de France
  6. French National Research Agency (ANR) [ANR-19-CE19-0012]
  7. Agence Nationale de la Recherche (ANR) [ANR-19-CE19-0012] Funding Source: Agence Nationale de la Recherche (ANR)

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Molecularly imprinted polymers (MIPs) have become highly attractive materials for biomimetic molecular recognition due to their excellent affinity and specificity, as well as their robustness and competitive costs. Control over size, morphology, and physical form of MIPs has led to defined micro- and nanostructures, crucial for modern applications. Light as a stimulus for structuring MIPs has emerged as a powerful tool, offering new possibilities for their development and application.
Over the past few decades, molecularly imprinted polymers (MIPs) have become extremely attractive materials for biomimetic molecular recognition due to their excellent affinity and specificity, combined with robustness, easy engineering, and competitive costs. MIPs are synthetic antibody mimics obtained by the synthesis of 3D polymer networks around template molecules, thus generating specific binding cavities. Numerous efforts have been made to improve the performances and the versatility of MIPs, with a special focus on ways to control their size, morphology, and physical form for a given application. Gaining control over these parameters has allowed MIPs to adopt a defined micro- and nanostructure, providing access to nanocomposites and micro/nanosystems, with fine-tuned properties, which become critical for modern applications ranging from chemical sensing to bioimaging and medical therapy. In this rich and complex context, light as a cheap and versatile source of energy has emerged as a powerful tool for structuring MIPs. This review presents the most recent advances on structuring MIPs at the nano/ microscale, using light as a stimulus to trigger the polymerization process. Thus, after a general introduction on radical polymerization of MIPs, with a special emphasis on photopolymerization by UV and visible light, the reader will be presented with ways of structuring MIPs by processes that are inherently spatially confined, such as localized photopolymerization and lithographic techniques, supported by representative examples and complemented with a final outlook on future trends in this field.

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