Magnetic field-driven particle assembly and jamming for bistable memory and response plasticity
Loading...
Access rights
openAccess
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2022-11-11
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
8
Series
Science Advances, Volume 8, issue 45, pp. 1-8
Abstract
Unlike classic synthetic stimulus-responsive and shape-memory materials, which remain limited to fixed responses, the responses of living systems dynamically adapt based on the repetition, intensity, and history of stimuli. Such plasticity is ubiquitous in biology, which is profoundly linked to memory and learning. Concepts thereof are searched for rudimentary forms of "intelligent materials." Here, we show plasticity of electroconductivity in soft ferromagnetic nickel colloidal supraparticles with spiny surfaces, assembling/disassembling to granular conducting micropillars between two electrodes driven by magnetic field B. Colloidal jamming leads to conduction hysteresis and bistable memory upon increasing and subsequently decreasing B. Abrupt B changes induce larger conduction changes than gradual B-changes. Periodic B pulsing drives to frequency-dependent facilitation or suppression of conductivity compared to exposing the same constant field. The concepts allow remotely controlled switching plasticity, illustrated by a rudimentary device. More generally, we foresee adaptive functional materials inspired by response plasticity and learning.Description
| openaire: EC/H2020/742829/EU//DRIVEN
Keywords
Other note
Citation
Liu, X, Tan, H, Rigoni, C, Hartikainen, T, Asghar, N, van Dijken, S, Timonen, J V I, Peng, B & Ikkala, O 2022, ' Magnetic field-driven particle assembly and jamming for bistable memory and response plasticity ', Science Advances, vol. 8, no. 45, eadc9394, pp. 1-8 . https://doi.org/10.1126/sciadv.adc9394