Nematic colloidal micro-robots as physically intelligent systems

Yao, Tianyi (avtor), Kos, Žiga (avtor), Zhang, Qi Xing (avtor), Luo, Yimin (avtor), Serra, Francesca (avtor), Steager, Edward B. (avtor), Ravnik, Miha (avtor), Stebe, Kathleen J. (avtor)

Physically intelligent micro-robotic systems exploit information embedded in micro-robots, their colloidal cargo, and their milieu to interact, assemble, and form functional structures. Nonlinear anisotropic fluids such as nematic liquid crystals (NLCs) provide untapped opportunities to embed interactions via their topological defects, complex elastic responses, and ability to dramatically restructure in dynamic settings. Here a four-armed ferromagnetic micro-robot is designed and fabricated to embed and dynamically reconfigure information in the nematic director field, generating a suite of physical interactions for cargo manipulation. The micro-robot shape and surface chemistry are designed to generate a nemato-elastic energy landscape in the domain that defines multiple modes of emergent, bottom-up interactions with passive colloids. Micro-robot rotation expands the ability to sculpt interactions; the energy landscape around a rotating micro-robot is dynamically reconfigured by complex far-from-equilibrium dynamics of the micro-robot’s companion topological defect. These defect dynamics allow transient information to be programmed into the domain and exploited. Robust micro-robotic manipulation strategies are demonstrated that exploit these diverse modes of nemato-elastic interaction to achieve cargo docking, transport, release, and assembly of complex reconfigurable structures at multi-stable sites. Such structures are of great interest to future developments of LC-based advanced optical device and micro-manufacturing in anisotropic environments.

• Jezik: Angleški jezik
• Ključne besede: active soft materials, nematic colloids, micro-robots, nonlinear dynamics, topology, directed assembly, emergent interactions
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2022
• Št. strani: 13 str.
• Številčenje: Vol. 32, iss. 44, art. 2205546
• PID: 20.500.12556/RUL-143412
• UDK: 538.9
• ISSN pri članku: 1616-301X
• DOI: 10.1002/adfm.202205546
• COBISS.SI-ID: 119422979
• Datum objave v RUL: 20.12.2022

Gradivo je del revije

• Naslov: Advanced functional materials
• Skrajšan naslov: Adv. funct. mater.
• Založnik: Wiley
• ISSN: 1616-301X
• COBISS.SI-ID: 23502597

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: aktivna mehka snov, nematski koloidi, mikroroboti, nelinearna dinamika, topologija

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P1-0099
• Naslov: Fizika mehkih snovi, površin in nanostruktur

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: N1-0124
• Naslov: Geometrijsko in topološko vodenje aktivnih elastomerov