Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 42, Issue 1, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.202000528
Keywords
mechanochromism; polymers; structural colors
Categories
Funding
- National Centre of Competence in Research (NCCR) Bio-Inspired Materials, a research instrument of the Swiss National Science Foundation (SNF)
- Adolphe Merkle Foundation
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Mechanochromic effects in structurally colored materials result from deformation-induced changes to their ordered nanostructures, offering characteristics such as continuous strain sensing, high strain resolution, and a wide strain-sensing range. Various approaches to achieve mechanochromic effects in these materials are discussed, along with their potential applications.
Mechanochromic effects in structurally colored materials are the result of deformation-induced changes to their ordered nanostructures. Polymeric materials which respond in this way to deformation offer an attractive combination of characteristics, including continuous strain sensing, high strain resolution, and a wide strain-sensing range. Such materials are potentially useful for a wide range of applications, which extend from pressure-sensing bandages to anti-counterfeiting devices. Focusing on the materials design aspects, recent developments in this field are summarized. The article starts with an overview of different approaches to achieve mechanochromic effects in structurally colored materials, before the physical principles governing the interaction of light with each of these materials types are summarized. Diverse methodologies to prepare these polymers are then discussed in detail, and where applicable, naturally occurring materials that inspired the design of artificial systems are discussed. The capabilities and limitations of structurally colored materials in reporting and visualizing mechanical deformation are examined from a general standpoint and also in more specific technological contexts. To conclude, current trends in the field are highlighted and possible future opportunities are identified.
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