Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Integrating chemistry, fluid flow, and mechanics to drive spontaneous formation of three-dimensional (3D) patterns in anchored microstructures

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [2];  [2]
  1. Univ. of Pittsburgh, PA (United States); University of Pittsburgh, Pittsburgh, PA (United States)
  2. Univ. of Pittsburgh, PA (United States)
Enzymatic reactions in solution drive the convection of confined fluids throughout the enclosing chambers and thereby couple the processes of reaction and convection. In these systems, the energy released from the chemical reactions generates a force, which propels the fluids’ spontaneous motion. Here, we use theoretical and computational modeling to determine how reaction-convection can be harnessed to tailor and control the dynamic behavior of soft matter immersed in solution. Our model system encompasses an array of surface-anchored, flexible posts in a millimeter-sized, fluid-filled chamber. Selected posts are coated with enzymes, which react with dissolved chemicals to produce buoyancy-driven fluid flows. We show that these chemically generated flows exert a force on both the coated (active) and passive posts and thus produce regular, self-organized patterns. Due to the specificity of enzymatic reactions, the posts display controllable kaleidoscopic behavior where one regular pattern is smoothly morphed into another with the addition of certain reactants. These spatiotemporal patterns also form “fingerprints” that distinctly characterize the system, reflecting the type of enzymes used, placement of the enzyme-coated posts, height of the chamber, and bending modulus of the elastic posts. The results reveal how reaction-convection provides concepts for designing soft matter that readily switches among multiple morphologies. This behavior enables microfluidic devices to be spontaneously reconfigured for specific applications without construction of new chambers and the fabrication of standalone sensors that operate without extraneous power sources.
Research Organization:
Univ. of Pittsburgh, PA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
FG02-90ER45438
OSTI ID:
2472313
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 11 Vol. 121; ISSN 0027-8424
Publisher:
National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

References (52)

Artificial Soft Cilia with Asymmetric Beating Patterns for Biomimetic Low‐Reynolds‐Number Fluid Propulsion journal March 2019
Thermomechanical Lithography: Pattern Replication Using a Temperature Gradient Driven Instability journal March 2003
Light‐Fueled Nonreciprocal Self‐Oscillators for Fluidic Transportation and Coupling journal January 2023
Patterned and Collective Motion of Densely Packed Tapered Multiresponsive Liquid Crystal Cilia journal March 2022
Light Tracking and Light Guiding Fiber Arrays by Adjusting the Location of Photoresponsive Azobenzene in Liquid Crystal Networks journal June 2020
Stokes flow for a stokeslet between two parallel flat plates journal October 1976
Ciliary motion modeling, and dynamic multicilia interactions journal October 1992
Trapping and Wiggling: Elastohydrodynamics of Driven Microfilaments journal February 1998
Dynamics of the Primary Cilium in Shear Flow journal August 2012
Metachronal motion of artificial cilia using induced charge electro-osmosis journal October 2021
Shear flow past slender elastic rods attached to a plane journal January 2011
Simulating the dynamics and interactions of flexible fibers in Stokes flows journal May 2004
Shear flow over cylindrical rods attached to a substrate journal April 2010
Self-Morphing, Chemically Driven Gears and Machines journal February 2021
The motion of long slender bodies in a viscous fluid Part 1. General theory journal December 1970
Transport and buckling dynamics of an elastic fibre in a viscous cellular flow journal March 2015
On the role of heat source location and multiplicity in topographically controlled Marangoni–Rayleigh–Bénard convection journal March 2022
Self-Generated Convective Flows Enhance the Rates of Chemical Reactions journal January 2022
Chemically Driven Multimodal Locomotion of Active, Flexible Sheets journal January 2023
The Original Michaelis Constant: Translation of the 1913 Michaelis–Menten Paper journal October 2011
Magnetically Actuated Nanorod Arrays as Biomimetic Cilia journal April 2007
Lattice-Boltzmann Simulations of Particle-Fluid Suspensions journal January 2001
Synthetic homeostatic materials with chemo-mechano-chemical self-regulation journal July 2012
Self-powered enzyme micropumps journal March 2014
Harnessing catalytic pumps for directional delivery of microparticles in microchambers journal February 2017
Printed artificial cilia from liquid-crystal network actuators modularly driven by light journal June 2009
Self-regulated non-reciprocal motions in single-material microstructures journal May 2022
Cilia metasurfaces for electronically programmable microfluidic manipulation journal May 2022
Chemically controlled shape-morphing of elastic sheets journal January 2020
Artificial cilia for active micro-fluidic mixing journal January 2008
Magnetically-actuated artificial cilia for microfluidic propulsion journal January 2011
Transport and mixing by metachronal waves in nonreciprocal soft robotic pneumatic artificial cilia at low Reynolds numbers journal September 2021
Self-assembled artificial cilia journal November 2009
Chemical pumps and flexible sheets spontaneously form self-regulating oscillators in solution journal March 2021
Bioinspired shape shifting of liquid-infused ribbed sheets journal December 2022
The hydrodynamics of swimming microorganisms journal August 2009
Solutal-buoyancy-driven intertwining and rotation of patterned elastic sheets journal June 2022
Spontaneous oscillations of elastic filaments induced by molecular motors journal November 2017
Instability-driven oscillations of elastic microfilaments journal December 2018
Elastocapillary coalescence of plates and pillars journal March 2015
Interfacial flows past arrays of elastic fibers journal April 2023
Experimental Verification of the Formation Mechanism for Pillar Arrays in Nanofilms Subject to Large Thermal Gradients journal April 2011
Instability of Elastic Filaments in Shear Flow Yields First-Normal-Stress Differences journal October 2001
Dynamics of filaments and membranes in a viscous fluid journal May 2010
Harnessing surface-bound enzymatic reactions to organize microcapsules in solution journal March 2016
Bioinspired cilia arrays with programmable nonreciprocal motion and metachronal coordination journal November 2020
Metachronal patterns in artificial cilia for low Reynolds number fluid propulsion journal December 2020
Self-Organization of a Mesoscale Bristle into Ordered, Hierarchical Helical Assemblies journal January 2009
Dynamics of a Closed Rod with Twist and Bend in Fluid journal January 2008
Dynamics of Flexible Fibers in Viscous Flows and Fluids journal January 2019
Elastocapillarity: When Surface Tension Deforms Elastic Solids journal January 2018
High-Speed Asymmetric Motion of Thermally Actuated Cilium journal November 2020