Development of a specialized diamond knife for controlled notch introduction in ultrathin polymer films for in situ tensile transmission electron microscopy
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ID: 319027
2026
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Abstract
In situ tensile testing in a transmission electron microscope (TEM) is a powerful tool for investigating polymer fracture at the nanoscale, but the stochastic nature of crack initiation has long hindered systematic observation. We report a specialized diamond knife, co-developed with Syntek Co., Ltd., that introduces a controlled V-shaped notch into a trimmed specimen block prior to cryo-ultramicrotomy. Ultrathin films (∼100 nm) of a copolymer film containing a well-defined notch were prepared and observed using in situ tensile TEM. Cracks initiated reproducibly from the notch tip and propagated predictably, providing new experimental control for nanoscale fracture studies.
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| Authors | Akemi Kumagai, Hiroshi Jinnai |
| Journal | Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada |
| Year | 2026 |
| DOI |
10.1093/jmicro/dfag031
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| URL | |
| Keywords | Keywords not found |
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