e-journal
Controlled, Bio-inspired Self-Assembly of Cellulose-Based Chiral Refl ectors
Layered transparent photonic stacks are known to give rise to highly brilliant color in a variety of living organisms. [ 1 ] The biomimetic replication of these structures not only offers a wide range of applications, but can also be used as a tool to gain understanding of the biological processes responsible for the self-assembly of these structures in nature. Recent studies showed that cellulose microfi brils form helicoidal stacks in the plant cell wall, which selectively refl ect circularly-polarised light of a specifi c wavelength. [ 2–5 ] Such structures are responsible
for the bright colors in fruits [ 2 ] and leaves [ 3 ] of very different species of plants. [ 4,5 ] Similar photonic structures can be artifi cially produced using the same constituent material, cellulose nano-crystals (CNCs).
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