Veranstaltungen 2023
Do, 14.12.2023 - Sondertermin
14:15 Uhr im Seminarraum 1.02 Von-Seckendorff-Platz 1, 06120 Halle
Prof. Dr. Alexey V. Lyulin
Soft Matter and Biological Physics, Department of Applied Physics and Science Education, Technische Universiteit Eindhoven, 5600 MB, Eindhoven, The Netherlands and Center for Computational Energy Research, Technische Universiteit Eindhoven, 5600 MB, Eindhoven, The Netherlands
Multiscale modelling of the glass transition in Nafion membranes for
perspective flow and fuel batteries
Nafion is a commonly used polyelectrolyte membrane (PEM) in fuel cells and flow batteries. Nanocomposites of Nafion are used to enhance temperature resistance and proton conductivity. The properties of hydrated membranes, and the water influence on Nafion glassy behavior is very important. We first report molecular-dynamics simulations of Nafion films of different thicknesses between two potential walls of variable wettability [1]. The water cluster sizes showed an increase with film thickness for the high wettability cases, in agreement with SAXS experiments. The in-plane water diffusion was considerably enhanced for the high wettability walls. We report the modelling of the annealing effects on both structure, dynamics and electric conductivity of the membranes. We observe [2] strong antiplasticization effect and increase in the glass-transition temperature upon hydration. The hydrophilic channels evolution upon annealing and associated changes in ion diffusion and electric conductivity will be discussed. Large scale Dissipative Particle Dynamics simulations were carried out as well to study the temporal evolution of the water-PEM interface as a function of the PEM side-chain length.
Acknowledgements
This work was done as a part of the FOM-SHELL 15CSER13 research project and was carried out on the Dutch national e-infrastructure with the support of SURF Cooperative. AVL and AV both thank DUO-India Fellowship Program for the possibility to visit and work at IISER Pune and TU Eindhoven, correspondingly. Arun Venkatnathan thanks DST Nanomission Thematic Unit (SR/NM/TP-13/2016(G)).
References
[1] S. Sengupta, A. V. Lyulin, J. Phys. Chem. B, 122, 6107-6119, 2018.
[2] A. V. Lyulin S. Sengupta, A. Varghese, P. Komarov and A. Venkatnathan, ACS Appl. Polym. Mater., 2, 5058-5066, 2020.
Die, 12.12.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Prof. Dr. Andreas Herrmann
Leibniz Institute for Interactive Materials DWI, Aachen, Germany
RWTH Aachen, Germany
Sonopharmacology and Sonogenetics: Activating drugs, proteins and genes by ultrasound
Remote controlling biological systems is an exciting endeavour because it is the offspring for new therapies and allows answering fundamental biological questions. In this context, the field of optogenetics has enabled the understanding of neural circuits and disorders.[1,2] However, current optogenetic techniques are hampered by the low penetration of light into tissue and hence often require invasive surgical procedures to deliver photons to target cells. Therefore, ultrasound (US) was used as alternative trigger since US can deeply penetrate tissue with high spatiotemporal control and has been safely applied in the clinic for many decades.[3] Our group has developed general molecular technologies to activate drugs, proteins and nucleic acids by US employing principles from polymer mechano-chemistry.[4,5] Two types of mechano-sensitive carriers have been discovered, i.e. high molar mass polynucleic acid aptamers and colloidal hydrogel microbubbles. Polynucleic acids fabricated by enzymatic reactions undergo covalent and non-covalent bond cleavage induced by shear forces originating from US-induced cavitation bubbles. These nucleic acid carriers harbouring different bioactive payloads allow the activation of small bioactive molecules and drugs that can initiate gene expression, kill pathogens or cure diseases.[4,5] Moreover, the activation of thrombin by US allows the general control over protein activity in combination with split inteins.[6] A particular emphasis is paid to reducing US energies to make these sonogenetic and sonopharmacological systems compatible with living matter.[7] In this realm, microbubbles containing a hydrogel shell with embedded mechanophores were developed.[8]
References:
[1] Haubensak W, Kunwar PS, Cai H, Ciocchi S, Wall NR, Ponnusamy R, Jonathan Biag, Dong H-W, Deisseroth K, Callaway EM, Fanselow MS, Lüthi A, Anderson DJ, Nature (2010) 468: 270.
[2] Kravitz AV, Freeze BS, Parker PR, Kay K, Thwin MT, Deisseroth K, Kreitzer AC, Nature (2010) 466: 622.
[3] Wang T, Wang H, Pang G, He T, Yu P, Cheng G, Zhang Y, Chang J, ACS Appl. Mat. & Interf. (2020) 12: 56692.
[4] Paul A, Warszawik EM, Loznik M, Boersma AJ, Herrmann A, Angew. Chem. Int. Ed. (2020) 59, 20328.
[5] Huo S, Zhao P, Shi Z, Zou M, Yang X, Warszawik E, Loznik M, Göstl G, Herrmann A, Nat. Chem. (2021) 13: 131.
[6] Zhao P, Huo S, Fan J, Chen J, Kiessling F, Boersma AJ, Göstl R, Herrmann A, Angew. Chem. Int. Ed. (2021) 60, 14707.
[7] Yildiz D, Göstl R, Herrmann A, Chem. Sci. (2022) 13: 13708.
[8] Xuan M, Fan J, Ngoc Khiêm V, Zou M, Brenske KO, Mourran A, Vinokur R, Zheng L, Itskov M, Göstl R, Herrmann A, Adv. Mat. (2023) published online doi.org/10.1002/adma.202305130.
Meeting-ID: 2731 781 6143
Passwort: bVhRTe5C?87
Die, 05.12.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Prof. Dr. Felix H. Schacher
Friedrich Schiller University Jena, Germany
Can polymers do magic? - The role(s) of polymeric templates in light-driven catalysis
Polymers are a versatile class of materials with almost unlimited combinations of functional groups being present in close proximity. This in combination with a widely tunable solubility has enabled quite a range of examples where building blocks for light-driven catalysis (i.e., photosensitizers and catalysts) are immobilized using either covalent anchoring or non-covalent interactions. During recent years, we have developed different soft matter matrices for either light-driven hydrogen evolution (HER) or water oxidation (WOC) based on unimolecular graft copolymers, block copolymer micelles, hydrogels, or nanoporous block copolymer membranes. In all cases, close proximity of the immobilized building blocks facilitated light-driven reactivity, but we also observed additional effects during our studies, such as prolonged lifetime of photosensitizers, altered degradation pathways, or the possibility to repair / exchange catalysts or sensitizers. In addition, some effects imply that – especially in case of polyampholytic graft copolymers – the polymeric matrix is also involved in charge transport, presumably due to the high charge density present along the polymer backbone. Altogether, in this contribution we try to derive some general guidelines for the design of (charged) soft matter matrices for light-driven catalysis.
Meeting-ID: 2731 781 6143
Passwort: bVhRTe5C?87
Di, 28.11.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Dr. Mehdi D. Davari
Leibniz Institute of Plant Biochemistry, Germany
Synergizing Science and Innovation: Developing Sustainable Detergents with Computational Modeling and Experiments
The modern laundry detergents present a complex interplay of diverse components - enzymes, surfactants, builders, bleaching agents, and minor additives, all synergistically engineered to remove stains. A fundamental comprehension of the molecular interactions between these components stands as a pivotal avenue for advancing the formulation, performance, and sustainability of detergent industry products.
In this presentation, I will delve into the research conducted within the Henkel Innovation Campus for Advanced and Sustainable Technologies (HICAST) between 2014 and 2019 at RWTH Aachen University. HICAST's primary focus was on developing novel, sustainable laundry detergents by unlocking the mysteries surrounding interactions among detergent components. Our primary objective was to deeply probe the molecular dynamics governing the boosting of protease activity in detergent enzymes when interacting with polymers and surfactants. Our multidisciplinary approach, integrating computational modeling (atomistic and coarse-grained molecular dynamic simulations), alongside colorimetric analysis and biophysical characterization methods (CD, FCS, ITC, and DLS), and innovative enzyme engineering, outlined a promising workflow. This methodology provided us with profound molecular insights into the mechanisms that govern this enhancement and effectively elevate detergent performance. Importantly, the profound understanding of the fundamental principles underpinning increased protease performance holds promise for applications across diverse detergent enzymes. It is poised to revolutionize the engineering of enzymes, polymers, and surfactants compositions in the realm of modern laundry detergents.
This presentation offers a glimpse into a realm where computational modeling, enzyme engineering, and soft matter engineering converge, opening the door to an era of more sustainable, high-performing detergent formulations.
Meeting-ID: 2731 781 6143
Passwort: bVhRTe5C?87
Di, 21.11.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Prof. Dr. Karsten Mäder
Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Germany
Biodegradable polyesters for drug delivery: materials and performance
Biodegradable polyesters are important materials for controlled drug delivery. Until now, mainly polylactide (PLA) and poly-(lactide-co-glycolide) (PLGA are used to deliver the drug molecules over several weeks to months. The talk will discuss how material properties and processes, but also the size (nano- vs. micron range) are linked with the control of drug delivery. Despite PLA and PLGA dominate the field until now, they have several drawbacks. The formation of the acidic monomers lactic and glycolic acid leads to the formation of highly acidic microenvironments in vitro and in vivo 1–3 and might cause acylation and degradation of drug molecules prior release 4. It also triggers autocatalytic polymer degradation which leads to the paradox of a faster degradation of larger particles and implants. Acidic microenvironments can be prevented by the use of PEG-PLGA block polymers. Block polymers permit also and better release of hydrophilic drugs, because a zero-order release with no lag time can be achieved 5. The presentation will discuss the monitoring of the polymer microenvironment by EPR spectroscopy and optical imaging. It will also highlight the need for the development of alternative polymers for drug delivery purposes.
References:
1. Mäder, K., Gallez, B., Liu, K. J. & Swartz, H. M. Non-invasive in vivo characterization of release processes in biodegradable polymers by low-frequency electron paramagnetic resonance spectroscopy. Biomaterials17, 457–461 (1996).
2. Liu, Y. & Schwendeman, S. P. Mapping microclimate pH distribution inside protein-encapsulated PLGA microspheres using confocal laser scanning microscopy. Mol. Pharm.9, 1342–1350 (2012).
3. Schädlich, A., Kempe, S. & Mäder, K. Non-invasive in vivo characterization of microclimate pH inside in situ forming PLGA implants using multispectral fluorescence imaging. J. Control. Release179, 52–62 (2014).
4. Lucke, A., Kiermaier, J. & Göpferich, A. Peptide Acylation by Poly(α-Hydroxy Esters). Pharm. Res. 2002 19219, 175–181 (2002).
5. Elena de Souza, L. et al. Has PEG-PLGA advantages for the delivery of hydrophobic drugs? Risperidone as an example. J. Drug Deliv. Sci. Technol.61, 102239 (2020).
Meeting-ID: 2731 781 6143
Passwort: bVhRTe5C?87
Die, 14.11.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Dr. Martina Delbianco
Max Planck Institute of Colloids and Interfaces, Postdam-Golm, Germany
Synthetic carbohydrate-based materials
Natural biopolymers have inspired the development of synthetic analogues capable of adopting defined conformations and forming programmable three-dimensional architectures. These compounds are mainly based on peptides and nucleic acids, that are well understood at the molecular level. In contrast, the complexity of carbohydrate synthesis and structural analysis have prevented access to synthetic carbohydrates capable of adopting defined geometries. In the Delbianco group, we prepare well-defined oligosaccharides to understand how the primary sequence affects the carbohydrate conformation.1 With multiple analytical techniques, we study the conformation of single carbohydrate chains2 and explore how several carbohydrate molecules aggregate to form a material3. Building on this fundamental knowledge, we present the rational design and synthesis of a glycan adopting a stable secondary structure,4 challenging the common belief that glycans are not capable of folding due to their flexibility. The ability to control the conformation of glycans could lead to the generation of programmable 3-D architectures, with applications in catalysis and nanotechnology.
References:
1. Y. Yu, T. Tyrikos-Ergas, Y. Zhu, G. Fittolani, V. Bordoni, A. Singhal, R. J. Fair, A. Grafmüller, P. H. Seeberger, M. Delbianco, Angew. Chem., Int. Ed. 2019, 58, 1433-7851
2. X. Wu, M. Delbianco, K. Anggara, T. Michnowicz, A. Pardo-Vargas, P. Bharate, S. Sen, M. Pristl, S. Rauschenbach, U. Schlickum, S. Abb, P. H. Seeberger, K. Kern, Nature 2020, 582, 375-378.
3. G. Fittolani, D. Vargová, P. H. Seeberger, Y. Ogawa, M. Delbianco, J. Am. Chem. Soc. 2022, 144, 12469-12475.
4. G. Fittolani, T. Tyrikos-Ergas, Y. Yu, N. Yadav, P.H. Seeberger, J. Jiménez-Barbero, M. Delbianco, Synthesis of a glycan hairpin, Nat. Chem., 2023, 15, 1461
Di, 07.11.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Dr. Eva von Domaros
Friedrich Schiller University Jena, Germany
Can polymer properties be predicted from theory?
The material class of polymers is not only extremely large and complex. Polymers are important parts of our daily lives as plastics or biopolymers like sugars or the DNA backbone. The theoretical understanding---let alone the prediction---of polymer properties is very demanding. The reason therefore is a combination of polymer characteristics. Very large system sizes that easily reach thousands of repeating subunits are hardly feasible for accurate electronic structure methods such as DFT. Furthermore, in contrast to crystalline compounds, polymers are amorphous and lack periodic symmetry, which can be exploited for crystals in periodic calculations. Theoretical models which are capable of treating these systems necessarily apply approximations such as parameterized force fields and, hence, are less accurate and reliable.
In this presentation, a novel approach to understand and later on predict macroscopic properties of this diverse material class is presented. The so-called Quantum Cluster Equilibrium (QCE) method is based on a statistical approach which allows to transfer highly reliable electronic structure data to macroscopic phases. The QCE method will be introduced and demonstrated at the example of liquid systems. Afterwards, the extension to amorphous systems such as polymers will be demonstrated, and promising applications will be presented. Finally, it will be shown which properties are within the reach of this method and the limitations will be discussed.
Meeting-ID: 2731 781 6143
Passwort: bVhRTe5C?87
Di, 24.10.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Prof. Dr. Chris McNeill
Monash University, Melbourne, Australia
Resonant Tender X-ray Scattering of Conjugated Polymers
Semiconducting polymers are being developed for application in a wide range of optoelectronic devices including solar cells, LED and transistors. Being polymeric materials they offer advantages over traditional semiconductors including ease of processing and mechanical flexibility. Most semiconducting polymers are semicrystalline, and the way in which polymer chains pack strongly affects their optoelectronic performance. Unlike small molecule crystals whose structure can be directly solved using established crystallographic methods, semiconducting polymers are more disordered meaning that there are not enough diffraction peaks available. To squeeze more information from the diffraction peaks that are present, we have turned to resonant tender X-ray diffraction: By varying the X-ray energy across an elemental absorption edge, variations in diffraction intensity are observed that can provide additional information about molecular packing. Also known as anomalous diffraction, this technique has been applied in other fields such as protein crystallography. As many semiconducting polymers utilise sulfur as heteroatoms, we have studied resonant diffraction effects at the sulfur K-edge in the tender X-ray regime. By performing high resolution energy scans across the sulfur K-edge, we show that spectroscopic information relating to specific bonds and molecular orientation can be discerned in the resonant X-ray diffraction profiles.
Indeed, by understanding the anisotropic X-ray absorption properties of these materials we are able to interpret this data allowing us to distinguish between different crystalline polymorphs and resolve the tilting of the polymer backbone with respect to the unit cell axes. In general our work highlights how the fields of crystallography and spectroscopy can be combined to provide new insights into the molecular packing of weakly ordered soft materials.
Meeting-ID: 2731 781 6143
Passwort: bVhRTe5C?87
Di, 17.10.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Prof. Dr. Rameshwar Adhikari
Central Department of Chemistry and Research Centre for Applied Science and Technology (RECAST), Tribhuvan University, Kathmandu, Nepal
Structure-Properties Correlations in poly(butylene adipate -co-terephthalate) Based Compostable Composites
We shed light on the structure-properties correlation of composite materials comprising a biodegradable polymer, the poly(butylene adipate-co-terephthalate) (PBAT), and some natural fibers (such as lignocelluloses, chitosan processed via different routes) and nanofillers (such as multiwalled carbon nanotubes), particularly focusing on mechanical, morphological and electrical properties as well as degradation under soil burial conditions. It was shown that the morphology and mechanical properties of the composites can be tailored over a wide range although the materials were found to be suited for low load bearing applications.
Meeting-ID: 2731 781 6143
Passwort: bVhRTe5C?87
Di, 10.10.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Prof. Dr. Ralf B. Wehrspohn
Microstructure-based Materials Design, Martin Luther University Halle-Wittenberg
(Towards) bio-intelligent materials
The wetting behavior on 2D and 3D surfaces for e.g. polymer processing or nanostructuring is still in detail unknown and difficult to measure since inner surfaces are difficult to characterize. Similarly, hierarchically structured polymer nanostructures or metamaterials with improved mechanical properties exhibit similar problem understanding their detailed behavior.
For understanding wetting behavior as inner polymer nanostructures,
3D microscopy is of utmost importance. Since about 10 years now, 3D X-Rays Microscopy with nanometer resolution is available for
university research. With our microscopic technology, we are able
to understand for the first time the wetting kinetics and the principles of hierarchically structured polymers.
At the end of the seminar, the limits in resolution are discussed and possible ways to circumvent them are presented such as expansion
microscopy.
Meeting-ID: 2731 781 6143
Passwort: bVhRTe5C?87
Di, 11.07.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Dr. Arash Nikoubashman
Statistical Physics and Soft Matter Theory, University of Mainz
Directed assembly of polymeric nanoparticles through solvent exchange
Tailored nanoparticles are increasingly sought after for many scientific and technological applications, such as optoelectronic devices and selective catalysts. However, both research and commercialization of these materials has been impeded by the lack of suitable fabrication techniques. One promising approach for overcoming this hurdle is flash nanoprecipitation, where (soft) nanoparticles are assembled through rapid micromixing of polymers in solution with a miscible poor solvent. This continuous process allows for high yields as well as precise control over particle size and morphology. We employed multiscale simulations of this process to understand its underlying mechanisms and to efficiently explore parameter space. We first performed explicit solvent molecular dynamics (MD) simulations of a bead-spring polymer model to study the microscopic properties of the fabrication process. Then, we fed the MD data into a kinetic Monte Carlo algorithm to reach macroscopic length- and timescales. We discovered that the nanoparticle size can be reliably tuned through the initial polymer concentration and the mixing rate. Further, we were able to fabricate a wide variety of structured colloids, such as (amphiphilic) Janus and core-shell particles, when polymer blends were used in the feed stream.
Meeting-ID: 932 2177 9598
Passwort: 547489
Di, 04.07.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Prof. Dr. Seema Agarwal
Faculty of Biology, Chemistry and Earth Science, Macromolecular Chemistry, University of Bayreuth
Plastic pollution: Role of sustainable biodegradable polymers
The extreme stability of polymers has challenged society with the accumulation of plastic waste and its management worldwide. Whether biodegradable polymers can be one of the solutions to the problem of plastic waste is a question very often raised in this context. The answer is not straightforward as several aspects need to be considered regarding environmental sustainability, acceptability, and degradability in the complex natural environment. The present talk will discuss the present scenario of the environmental acceptability of biodegradable polymers and the opportunities and challenges they offer regarding solving the problem of plastic pollution and their impact on the environment.
Meeting-ID: 932 2177 9598
Passwort: 547489
Di, 23.05.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Dr. Ralm G. Ricarte
Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310
"Linear viscoelasticity of vitrimer melts"
Vitrimers are covalently cross-linked polymer networks that are insoluble in good solvent but still recyclable at elevated temperatures. These paradoxical traits are enabled by their cross-links, which engage in dynamic associative exchange reactions. Altering the chemical structure of the vitrimer cross-linker, backbone, or both modifies flow and mechanical properties. In this talk, I will discuss our efforts to experimentally and theoretically illuminate structure-viscoelasticity relationships for vitrimer melts with cross-link densities well above the gel point.
Meeting-ID: 932 2177 9598
Passwort: 547489
Di, 02.05.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Dr. Anja Kuhnhold
Theoretical physics soft group, Institute of Physics, University of Freiburg
"From cholesteric liquid crystals to nematic tactoids - an overview of the behavior of (chiral) hard rods and (im)penetrable spheres"
Model systems composed of rod-like and spherical particles can tell us a lot about various actual soft matter systems.
By changing the geometry, the interaction, and the composition of particles in such model systems, one can study a range of soft matter phenomena, from (cholesteric) liquid crystalline phases over colloidal membranes to nematic tactoids.
We study different aspects of such systems by employing computer simulations involving rod-like and spherical particles. This talk will provide an overview of some of these aspects and how they can be tackled with simulation and theory.
Meeting-ID: 932 2177 9598
Passwort: 547489
Di, 31.01.2023 (Online Seminar!)
Prof. Dr. Olivier Lame
INSA de Lyon Department of Materials Science and Engineering
"A Coarse grained molecular dynamic model for realistic semi-crystalline structures: characterization of the amorphous phase in lamellar structures."
We use an high crystallizable coarse grained MD model to build oriented semi crystalline lamellar structure of typically 300000 beads with 1500 chains. By using artificial nucleus, we have forced the system to crystallize in a specific direction which ease mechanical testing and analyses. Moreover, we have characterized precisely the topology and structure of amorphous phase to try to better understand the mechanical properties.
Meeting-ID: 932 2177 9598
Passwort: 547489
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
This is an online seminar, but audience is encouraged to come to the seminar room for the live transmission and Q+A session.
Di, 17.01.2023
16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Prof. Dr. Andreas Walther
Life-Like Materials and Systems, Department of Chemistry, University of Mainz
"Metabolic DNA Systems Inspired from Life: Protocells and Systems with Lifecycles"
Living self-organizing systems operate far-from-equilibrium and display energy-dependent adaptive functionalities. They can serve as an inspiration to promote complexity and life-like functions in soft matter systems, which include for instance to pre-organize temporal behavior or install mechanisms for complex adaptative behavior. Along these lines, I will discuss two avenues towards autonomous and adaptive DNA active matter systems with simplistic metabolic reaction networks inside. On the one hand, I will discuss the formation of DNA-based protocell architectures with the ability to house abiotic catalysts driving downstream morphological adaptations. On the other hand, I will discuss the use of ATP as a chemical fuel to drive chemically fueled out-of-equilibrium systems using activation/deactivation networks. The latter allows to program self-assemblies and materials with lifetimes and programmable steady state dynamics.
Review: A. Walther, “From Responsive to Adaptive and Interactive Materials and Materials Systems: A Roadmap” Adv. Mater. 1905111 (2020).
Meeting-ID: 932 2177 9598
Passwort: 547489
Di, 10.01.2023 15:15 Uhr (Achtung, 1h früher als üblich und in SR 1.03 in VDP3)
im SR 1.03 Von-Danckelmann-Platz 3, 06120 Halle
We try to offer the hybrid option, but cannot guarantee it!
Aakash Sharma
Jülich Centre for Neutron Science, Forschungszentrum Jülich GmbH
"Correlating the properties and structure of semicrystalline polymers: Case of regenerated cellulose fibers."
Structure property relations in semicrystalline fibers is a daunting problem due to the complex microstructure ordered over multiple length scales. I will talk about developing simple tools and methodologies for capturing the differences in the structure of regenerated cellulose fibers manufactured using Lyocell and Viscose processes. The relevant microstructural features are related to the mechanical properties of fibers and are responsible for their counterintuitive viscoelastic response.
Meeting-ID: 932 2177 9598
Passwort: 547489