Mechanically adaptable molecular crystals have potential applications in flexible smart materials and devices. Here, we report the mechanism of plastic deformation in single crystals of a small organic molecule (N-(4-ethynylphenyl)-3-fluoro-4-(trifluoromethyl)benzamide) that can be repeatedly irreversibly bent and returned to its original shape without concomitant delamination or loss of integrity. Along with the quantification of the crystals' local and bulk mechanical properties (hardness, indentation modulus and Young's modulus), micro-focus synchrotron X-ray diffraction mapping show that upon deformation, molecular layers lined with trifluoromethyl groups cooperatively slip past one another resulting in their impressive plastic malleability.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/d0cc05904h | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Mechanism behind reduced resection ability of bent snares during cold snare polypectomy.
Sci Rep
December 2024
Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan.
Accidental bending of the snare sheath occasionally occurs during cold snare polypectomy (CSP). We aimed to demonstrate whether snare bending reduces resection ability and, if it does, what causes this reduction. Using currently available CSP snares and prototype snares, we investigated changes in the resection ability of bent snares as well as the stiffness of their sheaths and wire spindles.
View Article and Find Full Text PDFEvolution of hydraulic property and crack propagation of mine roof strata during bending-splitting deformation.
Sci Rep
December 2024
School of Resources & Safety Engineering, Central South University, Changsha, 410083, Hunan, China.
To explore the mechanism of water inrush from the mine roof strata, a series of seepage-acoustic emission (SAE) experiments on red sandstone disc samples were carried out. The effects of the height to diameter ratio (H/D) and pore pressure on the mechanical, hydraulic and crack propagation properties of red sandstones were investigated. Test results show that, the peak load of rock samples declines with the decreasing H/D and increasing pore pressure.
View Article and Find Full Text PDFA DNA Origami Pivot Hinge Driven by DNA Intercalators.
ACS Nano
December 2024
Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
Article Synopsis
- The DNA origami technique allows for the creation of nanoscale structures that can change shape dynamically.
- A new design features a hinge mechanism that pivots based on the concentration of DNA intercalators, using gold nanoparticles for support.
- This pivoting motion can be adjusted and repeated, potentially leading to the development of advanced nanosensors and actuators that amplify tiny movements caused by molecular interactions.
Cre, a conservative site-specific tyrosine recombinase, is a powerful gene editing tool in the laboratory. Expanded applications in human health are hindered by lack of understanding of the mechanism by which Cre selectively binds and recombines its cognate sequences. This knowledge is essential for retargeting the enzyme to new sites and for mitigating effects of off-target recombination.
View Article and Find Full Text PDFEffects of age/gender profiles and physical activity level on symmetry of lumbar muscle activation in pain-free older adults during various spinal movements.
Gait Posture
December 2024
Department of Orthopedic Surgery, Division of Orthopedic Research, Mayo Clinic, Rochester, MN, USA. Electronic address:
Background: Back muscles simultaneously drive spinal movements and stabilize the trunk. Paraspinal muscle activity is presumed to be symmetric and gender-insensitive, and more activated with aging to protect the spine during functional tasks.
Research Question: Does over-activated and asymmetric behaviors exist in the pain-free elderly population which is affected by their physical activity levels?
Methods: Forty healthy participants (aged 64.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!