1
|
Yardimci S, Gibaud T, Schwenger W, Sartucci M, Olmsted P, Urbach J, Dogic Z. Bonded straight and helical flagellar filaments form ultra-low-density glasses. Proc Natl Acad Sci U S A 2023; 120:e2215766120. [PMID: 37068256 PMCID: PMC10151462 DOI: 10.1073/pnas.2215766120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 02/21/2023] [Indexed: 04/19/2023] Open
Abstract
We study how the three-dimensional shape of rigid filaments determines the microscopic dynamics and macroscopic rheology of entangled semidilute Brownian suspensions. To control the filament shape we use bacterial flagella, which are microns-long helical or straight filaments assembled from flagellin monomers. We compare the dynamics of straight rods, helical filaments, and shape-diblock copolymers composed of seamlessly joined straight and helical segments. Caged by their neighbors, straight rods preferentially diffuse along their long axis, but exhibit significantly suppressed rotational diffusion. Entangled helical filaments escape their confining tube by corkscrewing through the dense obstacles created by other filaments. By comparison, the adjoining segments of the rod-helix shape-diblocks suppress both the translation and the corkscrewing dynamics. Consequently, the shape-diblock filaments become permanently jammed at exceedingly low densities. We also measure the rheological properties of semidilute suspensions and relate their mechanical properties to the microscopic dynamics of constituent filaments. In particular, rheology shows that an entangled suspension of shape rod-helix copolymers forms a low-density glass whose elastic modulus can be estimated by accounting for how shear deformations reduce the entropic degrees of freedom of constrained filaments. Our results demonstrate that the three-dimensional shape of rigid filaments can be used to design rheological properties of semidilute fibrous suspensions.
Collapse
Affiliation(s)
- Sevim Yardimci
- The Martin Fisher School of Physics, Brandeis University, Waltham, MA02454
- Single Molecule Imaging of Genome Duplication and Maintenance Laboratory, The Francis Crick Institute,NW1 1ATLondon, UK
| | - Thomas Gibaud
- The Martin Fisher School of Physics, Brandeis University, Waltham, MA02454
- Univ Lyon, Ens de Lyon, Univ Claude Bernard, CNRS, Laboratoire de Physique,F-69342Lyon, France
| | - Walter Schwenger
- The Martin Fisher School of Physics, Brandeis University, Waltham, MA02454
| | - Matthew R. Sartucci
- Department of Physics Institute for Soft Matter Synthesis and Metrology, Georgetown University, Washington, DC20057
| | - Peter D. Olmsted
- Department of Physics Institute for Soft Matter Synthesis and Metrology, Georgetown University, Washington, DC20057
| | - Jeffrey S. Urbach
- Department of Physics Institute for Soft Matter Synthesis and Metrology, Georgetown University, Washington, DC20057
| | - Zvonimir Dogic
- The Martin Fisher School of Physics, Brandeis University, Waltham, MA02454
- Department of Physics, University of California at Santa Barbara, Santa Barbara, CA93106
- Biomolecular Science and Engineering, University of California at Santa Barbara, Santa Barbara, CA93106
| |
Collapse
|
2
|
Calabrese V, Shen AQ, Haward SJ. Naturally derived colloidal rods in microfluidic flows. Biomicrofluidics 2023; 17:021301. [PMID: 37035099 PMCID: PMC10076066 DOI: 10.1063/5.0142867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 03/11/2023] [Indexed: 06/19/2023]
Abstract
Naturally derived colloidal rods (CR) are promising building blocks for developing sustainable soft materials. Engineering new materials based on naturally derived CR requires an in-depth understanding of the structural dynamics and self-assembly of CR in dispersion under processing conditions. With the advancement of microfabrication techniques, many microfluidic platforms have been employed to study the structural dynamics of CR under flow. However, each microfluidic design has its pros and cons which need careful evaluation in order to fully meet the experimental goal and correctly interpret the data. We analyze recent results obtained from naturally derived CR and relevant rod-like macromolecules under microfluidic flows, with emphasis on the dynamical behavior in shear- and extensional-dominated flows. We highlight the key concepts required in order to assess and evaluate the results obtained from different CR and microfluidic platforms as a whole and to aid interconnections with neighboring fields. Finally, we identify and discuss areas of interest for future research directions.
Collapse
|
3
|
Safi Samghabadi F, Slim AH, Smith MW, Chabi M, Conrad JC. Dynamics of Filamentous Viruses in Polyelectrolyte Solutions. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Farshad Safi Samghabadi
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas77204, United States
| | - Ali H. Slim
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas77204, United States
| | - Maxwell W. Smith
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas77204, United States
| | - Maede Chabi
- Department of Biomedical Engineering, University of Houston, Houston, Texas77204, United States
| | - Jacinta C. Conrad
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas77204, United States
| |
Collapse
|