journal article·2025-04-15

Magnetoresponsive Cellulose Nanofiber Hydrogels: Dynamic Structuring, Selective Light Transmission, and Information Encoding

Junhua Xu, Yujun Zou, Huangjingyi Chen, Zhangmin Wan, Ayako Takagi, Zhiguo Wang, Juan Yu, Liang Liu, Yi Lu, Yimin Fan, Orlando J. Rojas

ACS Nano· Volume 19· Issue 14
Publisher page

Abstract

Angle-dependent light reflection is a common phenomenon in nature, typically arising from the spatial arrangement of biological or mineral structures. Various strategies have been developed to replicate these assemblies, particularly to achieve structural color through bottom-up self- and directed assembly. However, dynamic control of light reflection remains a significant challenge. In this study, we present TEMPO-oxidized cellulose nanofibers modified with magnetic nanoparticles (approximately 10 nm in size) that exhibit rapid, directional alignment in aqueous media under magnetic fields, resulting in angle-dependent light reflection. By combining magnetic field manipulation with gas-phase hydrogelation, we were able to arrest the hydrogel structure, preserving the nanofibers' spatial and temporal orientation. This system enables the creation of on-demand optical patterns, which we demonstrate through selective light transmission and reflection, offering potential for applications in information coding, storage, and encryption.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Advanced Cellulose Research Studies · Advanced Materials and Mechanics · Advanced Sensor and Energy Harvesting Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, College of Light Industry and Food Engineering, Nanjing Forestry University, Longpan Road 159, Nanjing 210037, China

Bioproducts Institute, Department of Chemical and Biological Engineering, The University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada

CAS Key Laboratory of Green Process and Engineering

Institute of Process Engineering, Chinese Academy of Sciences

Department of Wood Science, University of British Columbia, 2385 East Mall, Vancouver, British Columbia V6T 1Z4, Canada

Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada

Funding

Canada Foundation for Innovation · Natural Science Foundation of Jiangsu Province · National Natural Science Foundation of China · Canada Excellence Research Chairs, Government of Canada · Pacific Economic Development Canada · Hundred Talents Program, Chinese Academy of Sciences

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