Real Space and Time Imaging of Collective Headgroup Dipole Motions in Zwitterionic Lipid Bilayers
Abstract
Lipid bilayers are supramolecular structures responsible for a range of processes, such as transmembrane transport of ions and solutes, and sorting and replication of genetic materials, to name just a few. Some of these processes are transient and currently, cannot be visualized in real space and time. Here, we developed an approach using 1D, 2D, and 3D Van Hove correlation functions to image collective headgroup dipole motions in zwitterionic phospholipid bilayers. We show that both 2D and 3D spatiotemporal images of headgroup dipoles are consistent with commonly understood dynamic features of fluids. However, analysis of the 1D Van Hove function reveals lateral transient and re-emergent collective dynamics of the headgroup dipoles—occurring at picosecond time scales—that transmit and dissipate heat at longer times, due to relaxation processes. At the same time, the headgroup dipoles also generate membrane surface undulations due a collective tilting of the headgroup dipoles. A continuous intensity band of headgroup dipole spatiotemporal correlations—at nanometer length and nanosecond time scales—indicates that dipoles undergo stretching and squeezing elastic deformations. Importantly, the above mentioned intrinsic headgroup dipole motions can be externally stimulated at GHz-frequency scale, enhancing their flexoelectric and piezoelectric capabilities (i.e., increased conversion efficiency of mechanical energy into electric energy).more »
- Authors:
-
- Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Shull-Wollan Center
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Volgograd State Technical University (Russia)
- Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Shull-Wollan Center; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
- Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Shull-Wollan Center; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
- OSTI Identifier:
- 1971016
- Grant/Contract Number:
- AC05-00OR22725; 2219289
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Membranes
- Additional Journal Information:
- Journal Volume: 13; Journal Issue: 4; Journal ID: ISSN 2077-0375
- Publisher:
- MDPI
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; zwitterionic lipid bilayers; POPC; DPPC; headgroup dipoles; collective dipole motions; Van Hove correlation functions; heat transfer; surface undulations; piezoelectricity; flexoelectricity
Citation Formats
Bolmatov, Dima, Collier, Charles Patrick, Zav’yalov, Dmitry, Egami, Takeshi, and Katsaras, John. Real Space and Time Imaging of Collective Headgroup Dipole Motions in Zwitterionic Lipid Bilayers. United States: N. p., 2023.
Web. doi:10.3390/membranes13040442.
Bolmatov, Dima, Collier, Charles Patrick, Zav’yalov, Dmitry, Egami, Takeshi, & Katsaras, John. Real Space and Time Imaging of Collective Headgroup Dipole Motions in Zwitterionic Lipid Bilayers. United States. https://doi.org/10.3390/membranes13040442
Bolmatov, Dima, Collier, Charles Patrick, Zav’yalov, Dmitry, Egami, Takeshi, and Katsaras, John. Tue .
"Real Space and Time Imaging of Collective Headgroup Dipole Motions in Zwitterionic Lipid Bilayers". United States. https://doi.org/10.3390/membranes13040442. https://www.osti.gov/servlets/purl/1971016.
@article{osti_1971016,
title = {Real Space and Time Imaging of Collective Headgroup Dipole Motions in Zwitterionic Lipid Bilayers},
author = {Bolmatov, Dima and Collier, Charles Patrick and Zav’yalov, Dmitry and Egami, Takeshi and Katsaras, John},
abstractNote = {Lipid bilayers are supramolecular structures responsible for a range of processes, such as transmembrane transport of ions and solutes, and sorting and replication of genetic materials, to name just a few. Some of these processes are transient and currently, cannot be visualized in real space and time. Here, we developed an approach using 1D, 2D, and 3D Van Hove correlation functions to image collective headgroup dipole motions in zwitterionic phospholipid bilayers. We show that both 2D and 3D spatiotemporal images of headgroup dipoles are consistent with commonly understood dynamic features of fluids. However, analysis of the 1D Van Hove function reveals lateral transient and re-emergent collective dynamics of the headgroup dipoles—occurring at picosecond time scales—that transmit and dissipate heat at longer times, due to relaxation processes. At the same time, the headgroup dipoles also generate membrane surface undulations due a collective tilting of the headgroup dipoles. A continuous intensity band of headgroup dipole spatiotemporal correlations—at nanometer length and nanosecond time scales—indicates that dipoles undergo stretching and squeezing elastic deformations. Importantly, the above mentioned intrinsic headgroup dipole motions can be externally stimulated at GHz-frequency scale, enhancing their flexoelectric and piezoelectric capabilities (i.e., increased conversion efficiency of mechanical energy into electric energy). In conclusion, we discuss how lipid membranes can provide molecular-level insights about biological learning and memory, and as platforms for the development of the next generation of neuromorphic computers.},
doi = {10.3390/membranes13040442},
journal = {Membranes},
number = 4,
volume = 13,
place = {United States},
year = {Tue Apr 18 00:00:00 EDT 2023},
month = {Tue Apr 18 00:00:00 EDT 2023}
}
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