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Cellulose and Pectic Polysaccharides

Cellulose and Pectic Polysaccharides

Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth. Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the...

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Updated: Dec 18, 2025

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

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Biodegradable and Insoluble Cellulose Photonic Crystals and Metasurfaces.

Vincenzo Caligiuri^1,2,3, Giacomo Tedeschi¹, Milan Palei^1,4

¹Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.

|June 20, 2020

Summary

Biodegradable cellulose was used to create robust photonic and plasmonic structures. These eco-friendly materials offer high-quality optical properties, even in humid conditions, addressing key environmental and technological challenges.

Keywords:

SERS biodegradability cellulose cocoa agro-waste meta-structures plasmonic colors water insolubility photonic crystals

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Area of Science:

Materials Science
Optics
Environmental Science

Background:

Plastic replacement with eco-friendly materials is a major environmental challenge.
Cellulose is a promising biodegradable polymer, but challenges exist in creating robust, high-end photonic materials.

Purpose of the Study:

To fabricate high-quality micro- and nanoscale photonic and plasmonic structures using biodegradable cellulose.
To assess the performance and durability of these cellulose-based materials in humid environments.

Main Methods:

Replica molding was employed using pure cellulose and cellulose blended with nonedible agro-wastes.
Biodegradability was tested according to ISO 17556 standards.
Optical properties, including refractive index and diffractive capabilities, were analyzed.

Main Results:

Cellulose films exhibited transparency in the vis-NIR spectrum with a glass-like refractive index.
Microstructured photonic crystals maintained high-quality diffractive properties even after prolonged water exposure.
Nanostructured cellulose formed biodegradable metasurfaces with structural colors and plasmonic properties after silver deposition.

Conclusions:

Biodegradable cellulose can be fabricated into robust, high-performance photonic and plasmonic structures.
These materials offer a sustainable alternative for advanced optical applications, demonstrating durability in humid conditions.
The developed metasurfaces show potential for plasmonic color generation and surface-enhanced Raman scattering applications.