Projects per year
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.
Original language | English |
---|---|
Article number | eadc9394 |
Pages (from-to) | 1-8 |
Number of pages | 8 |
Journal | Science Advances |
Volume | 8 |
Issue number | 45 |
DOIs | |
Publication status | Published - 11 Nov 2022 |
MoE publication type | A1 Journal article-refereed |
Fingerprint
Dive into the research topics of 'Magnetic field-driven particle assembly and jamming for bistable memory and response plasticity'. Together they form a unique fingerprint.Projects
- 6 Finished
-
-: Center of Excellence in Life-inspired Hybrid Material
Timonen, J. (Principal investigator), Mandal, S. (Project Member), Niemiec, E. (Project Member), Beppu, K. (Project Member), Böling, S. (Project Member), S Menon, A. (Project Member), Kärki, T. (Project Member), Reyes Garza, R. (Project Member), Scacchi, A. (Project Member) & Luntama, S. (Project Member)
01/01/2022 → 31/12/2024
Project: Academy of Finland: Other research funding
-
-: Center of Excellence in Life-inspired Hybrid Materials
Ikkala, O. (Principal investigator), Kang, J. (Project Member), Lin, Z. (Project Member), Miao, Z. (Project Member), Pi, H. (Project Member), Chandra, S. (Project Member), Gustavsson, L. (Project Member), Liang, C. (Project Member), Sheng, J. (Project Member), Fang, Y. (Project Member) & Hong, X. (Project Member)
01/01/2022 → 31/12/2024
Project: Academy of Finland: Other research funding
-
Design and self-assembly of anisotropic particles for advanced colloidal structures and materials
Peng, B. (Principal investigator), Kang, J. (Project Member), Hu, X. (Project Member), Chandra, S. (Project Member), Miao, Z. (Project Member), Liu, X. (Project Member) & Sheng, J. (Project Member)
01/09/2019 → 31/08/2022
Project: Academy of Finland: Other research funding
Equipment
-
Bioeconomy Research Infrastructure
Seppälä, J. (Manager)
School of Chemical EngineeringFacility/equipment: Facility
-
-
OtaNano - Nanomicroscopy Center
Seitsonen, J. (Manager) & Rissanen, A. (Other)
OtaNanoFacility/equipment: Facility
Press/Media
-
A next generation material that adapts to its history
15/11/2022 → 17/01/2023
8 items of Media coverage
Press/Media: Media appearance
-
Next Gen Material Learns from Its Past
Timonen, J., Ikkala, O., van Dijken, S. & Tan, H.
12/12/2022
1 item of Media coverage
Press/Media: Media appearance
-
Inspired by Living Systems – Next Generation Material Adapts to Its History
Timonen, J., Ikkala, O., van Dijken, S. & Tan, H.
10/12/2022
3 items of Media coverage
Press/Media: Media appearance