Super-durable ultralong carbon nanotubes

Abstract

Fatigue resistance is a key property of the service lifetime of structural materials. Carbon nanotubes (CNTs) are one of the strongest materials ever discovered, but measuring their fatigue resistance is a challenge because of their size and the lack of effective measurement methods for such small samples. We developed a noncontact acoustic resonance test system for investigating the fatigue behavior of centimeter-long individual CNTs. We found that CNTs have excellent fatigue resistance, which is dependent on temperature, and that the time to fatigue fracture of CNTs is dominated by the time to creation of the first defect.

The Recent Progress of MEMS/NEMS Resonators

“…Compared with the electron microscope test system, the ARP system can achieve non-destructive detection of longer-sized samples. By depositing on carbon nanotubes, changing the linear density to vary the resonance frequency [ 35 ]. Magnetomotive transduction technology can effectively support the testing of high-frequency devices [ 32 ].…”

“…( a ) Schematic of non-contact acoustic resonance test system. Adapted with permission from [ 35 ]. ( b ) Multi-layer heterostructure cantilever excited by magnetoelectric coupling.…”

Precise Synthesis of Carbon Nanotubes and One‐Dimensional Hybrids from Templates†

“…Carbon nanotubes (CNTs), [ 1 ] especially single‐walled CNTs (SWCNTs), [ 2 ] have attracted great attentions since 1991 owing to their structure ( i.e ., chirality) dependent extraordinary properties. Research and development of CNT applications keep on expanding as well, covering energy harvesting, [ 3‐4 ] water treatment, [ 5 ] transparent conductive thin‐films, [ 6 ] flexible and printed electronics, [ 7‐10 ] ultrahigh conductive fibers, [ 11‐13 ] next generation electronics, [ 14‐20 ] photonics, [ 21‐26 ] biological imaging, [ 27‐28 ] and high‐efficiency photovoltaic process (Figure 1). [ 29‐30 ] Many of these applications are enabled by the unique properties of SWCNTs.…”

“…Recent advances in the applications of CNTs. The images are reproduced from references 10–12, 16, 22, 27, 35, 36. Copyright © 2011, 2013, 2014, 2015, 2017 Nature Publication Group; Copyright © 2013, 2014, 2017, 2019 American Association for the Advancement of Science; Copyright © 2013 American Chemical Society.…”

Ultralong free-standing single crystal perovskite microwires with extremely low dark current

“…4d), (see the supplementary text for experimental details) suggesting the flexibility of the device. The decline is mainly from fatigue process of the microwire caused by stress during cyclic loading and the damage once cracks form 30 .…”