Nanodancing with Moisture: Humidity‐Sensitive Bilayer Actuator Derived from Cellulose Nanofibrils and Reduced Graphene Oxide

Autor: Frédéric Héraly, Miao Zhang, Agnes Åhl, Wei Cao, Lennart Bergström, Jiayin Yuan
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Advanced Intelligent Systems, Vol 4, Iss 1, Pp n/a-n/a (2022)
Druh dokumentu: article
ISSN: 2640-4567
DOI: 10.1002/aisy.202100084
Popis: Bilayer actuators, traditionally consisting of two laminated materials, are the most common types of soft or hybrid actuators. Herein, a nanomaterial‐based organic–inorganic humidity‐sensitive bilayer actuator composed of TEMPO‐oxidized cellulose nanofibrils (TCNF‐Na+) and reduced graphene oxide (rGO) sheets is presented. The hybrid actuator displays a large humidity‐driven locomotion with an atypical fast unbending. Cationic exchange of the anionically charged TCNF‐Na+ and control of the layer thickness is used to tune and dictate the locomotion and actuator's response to humidity variations. Assembly of a self‐oscillating electrical circuit, that includes a conductive rGO layer, displays autonomous on‐and‐off lighting in response to actuation‐driven alternating electrical heating.
Databáze: Directory of Open Access Journals