Unique Optical Properties of Cellulosic Materials

IF 14 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of materials research Pub Date : 2024-07-08 DOI:10.1021/accountsmr.4c00013
Jade Poisson, Kai Zhang
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Abstract

Our natural environment inspires much of our innovation in all fields of research and application. In particular, unique optical properties are observed in natural systems such as bioluminescence and structural colors generated by bioengineering specific nanostructures. Cellulose is one such naturally occurring material that has been particularly surprising and impactful. Cellulose is one of the most abundant biopolymers with incredible versatility and distinct optical properties. Cellulose nanomaterials can readily self-assemble into chiral nematic phases which induces birefringence resulting in unique optical properties as well as causing incident irradiation to be circularly polarized. These properties unlock possibilities for cellulose materials to be used in encryption and sensing applications to name a few. Thus, cellulose materials have been used extensively as chiral scaffolds in composites but not as luminophores themselves in circularly polarized luminescent (CPL) materials. Recent discovery of the intrinsic luminescence of cellulose has expanded the use of cellulose materials in optical applications.

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纤维素材料的独特光学特性
自然环境激发了我们在各个研究和应用领域的创新灵感。特别是,我们在自然系统中观察到了独特的光学特性,如生物发光和生物工程特定纳米结构产生的结构色彩。纤维素就是这样一种自然生成的材料,尤其令人惊奇,影响深远。纤维素是最丰富的生物聚合物之一,具有惊人的多功能性和独特的光学特性。纤维素纳米材料可以很容易地自组装成手性向列相,从而产生双折射,形成独特的光学特性,并使入射光产生圆偏振。这些特性为纤维素材料应用于加密和传感等领域提供了可能性。因此,纤维素材料已被广泛用作复合材料中的手性支架,但在圆偏振发光(CPL)材料中还没有被用作发光体。最近发现的纤维素固有发光特性拓展了纤维素材料在光学应用中的用途。
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