Jump to main content
Jump to site search


Small graphene oxide sheets/polyvinylidene fluoride bilayer actuator with large and rapid responses to multiple stimuli

Abstract

A high-performance actuator should be able to deliver large-shape deformations, fast actuations and sensitive responses to multiple stimuli. Here, we report such an actuator constructed by one layer of polyvinylidene fluoride (PVDF) with a high coefficient of thermal expansion (CTE), and another layer of small sheets of graphene oxide (SGO) with negative CTE. The opposite deformations of both actuation layers make the SGO/PVDF bilayer actuator highly sensitive to temperature stimulus with a large bending sensitivity of 1.5 cm−1 °C−1. Upon irradiation with a 60 mW cm−2 infrared light, this SGO/PVDF bilayer actuator displayed an extremely rapid tip displacement rate of 140 mm s−1. Furthermore, this actuator can also sensitively respond to moisture because of its SGO layer, showing a curvature change from −22 to 13 cm−1 upon changing relative humidity (RH) from 11% to 86%. This actuator can generate a contractile or relax stress 18 times that of mammalian skeletal by light irradiation or moisture with a response time as short as 1 s, being capable of lifting an object with a weight 80 times that of itself. Furthermore, it also showed an excellent stability and repeatability.

Back to tab navigation

Supplementary files

Publication details

The article was accepted on 11 Oct 2017 and first published on 11 Oct 2017


Article type: Paper
DOI: 10.1039/C7NR07116G
Citation: Nanoscale, 2017, Accepted Manuscript
  •   Request permissions

    Small graphene oxide sheets/polyvinylidene fluoride bilayer actuator with large and rapid responses to multiple stimuli

    G. Xu, M. Zhang, Q. Zhou, H. Chen, T. Gao, C. Li and G. Shi, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR07116G

Search articles by author

Spotlight

Advertisements