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Meeting Materials Science & Technology 2019
Symposium Emergent Materials under Extremes and Decisive In-situ Characterizations
Presentation Title In-situ Study of Multi-scale Deformation in Two-photon Polymerized Microlattices
Author(s) Pranjal Nautiyal, Victoria Wiedorn, Jenniffer Bustillos, Nicole Bacca, Xiaolong Lu, Sharon Fleischer, Gordana Vunjak-Novacovic, Alice White, Arvind Agarwal
On-Site Speaker (Planned) Pranjal Nautiyal
Abstract Scope Direct Laser Writing (DLW) via two-photon polymerization is used to fabricate honeycomb-like scaffolds for growing cardiac tissues. The structures consist of micrometer-thick walls that constitute honeycomb-shaped hollow cells less than 100 Ám in diameter, similar to the structure of native extracellular matrix. Considering their hierarchical structure and fine feature size, the load-bearing capability of the scaffolds is examined by ‘multi-scale’ in-situ indentation inside a scanning electron microscope to resolve the individual features and observe deformation in real time. The structures strongly resist deformation along the ‘out-of-plane’ orientation, collapse upon ‘in-plane’ loading, but demonstrate remarkable recovery upon unloading. Work hardening is observed for multiple loading cycles. The local modulus of the honeycomb walls is found to be ~800 MPa, which is 3 times higher than the modulus of the polymer under tension. The in-situ multi-scale characterization provides useful insights for printing of complex architectures with predictable mechanical characteristics using DLW.
Proceedings Inclusion? Definite: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Emerging Materials from Pressure Induced Electronic Transition
Exploring Materials Synthesis, Properties, and Metastability through Rapid (De)Compression
Exploring Radiation Resistance of Metal/Carbon Interface by In-situ Heavy Ion Irradiated Study
In-situ Aerodynamic Levitation Pair Distribution Function Studies: Alkali Silicate Crystallization and Sulfate-halide Liquids
In-situ and Time Resolved Characterization of Materials Using Liquid MetalJet X-ray Source
In-situ SEM Characterization of Phase Transformation in Metals and Alloys at High Temperatures
In-situ Study of Multi-scale Deformation in Two-photon Polymerized Microlattices
Interface Design for Radiation Resistant Metallic Nanocomposites
Materials Structure Evolution in Laser Additive Manufacturing Revealed by Synchrotron X-ray Imaging and Diffraction
Non-destructive Multi-property Determination under Extreme Conditions with Transient Grating Spectroscopy
Novel Superhard sp3 Carbon Allotrope from Cold-Compressed C70 Peapods
Operando X-ray PDF Study of Na and K Ion Intercalation in MnO2 Nanosheet Electrodes
Pressure-induced Dramatic Changes in Optoelectronic Properties of 2D Halide Perovskites
Pressure-induced Solidification of Water in Dynamic-DAC
Self-organization of Gas Bubbles in Materials under Irradiation
Structural Behavior and Phase Relations of β-Eucryptite at High P-T Conditions
Structural Stability and Optical Behaviors of Lead Halide Perovskite Nanocrystals at Extremes
Structural Transformations Induced at Extreme Conditions: Coupling High-pressure Cells with Energetic Ion Beams
Superconductivity in Amorphous Sb2Se3
Switchable In-plane Ferroelectricity in Quasi-2D Oxide

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