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Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
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An atomistic mechanism for elasto-plastic bending in molecular crystals
Biswajit Bhattacharya1, Adam A L Michalchuk1,2, Dorothee Silbernagl1
1BAM Federal Institute for Materials Research and Testing Richard-Willsätter-Strasse 12489 Berlin Germany biswajit.bhattacharya@bam.de dorothee.silbernagl@bam.de.
Chemical Science
|April 3, 2023
Summary
Mechanically flexible molecular crystals exhibit elasto-plastic bending due to linked molecular deformations. This study reveals a general mechanism for bending in organic molecular crystals, advancing materials design.
Area of Science:
- Materials Science
- Solid-State Physics
- Mechanics of Materials
Background:
- Mechanically flexible single crystals of molecular materials are promising for advanced applications.
- Understanding the mechanisms of elasto-plastic flexibility is crucial for exploiting their full potential.
Purpose of the Study:
- To conduct the first detailed mechanistic study of elasto-plastic flexibility in a molecular solid.
- To propose an atomistic origin for this mechanical behavior.
Main Methods:
- Combined experimental techniques: atomic force microscopy, synchrotron X-ray diffraction, and Raman spectroscopy.
- Computational methods: *ab initio* simulation and elastic tensor calculations.
Main Results:
- Identified an intimate link between elastic and plastic bending in molecular crystals.
- Demonstrated that both bending types arise from the same molecular deformations.
Conclusions:
- Proposed a general mechanism for elastic and plastic bending in organic molecular crystals.
- This mechanism bridges existing theories and offers a unified understanding.
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