Soft flexural waves and self-localization of wrinkling modes of single- and few-layer graphene under compression in a compliant matrix

Kosevich, Yuriy A.

doi:10.1103/physrevb.105.l121408

Cited by 1 publication

(2 citation statements)

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“…The depths of the gully-like wrinkles are ∼0.7 and ∼0.2 μm for the one-dimensional wrinkles (with 50% pre-strain in the X direction) and two-dimensional wrinkles (with 50% pre-strain in both X and Y directions), respectively (Figure g–i). The lower depth value in the two-dimensional wrinkles can be attributed to the Poisson’s effect of the shrunken PDMS substrate. , …”

Section: Resultsmentioning

confidence: 99%

“…The lower depth value in the two-dimensional wrinkles can be attributed to the Poisson's effect of the shrunken PDMS substrate. 38,39 The periodicity of wrinkles in the film is an important factor affecting its tensile performance. The wavelengths of the periodic wrinkles in MXene films can be well-controlled by changing the pre-strain (ε pre ) of the PDMS substrates, which is defined as ε pre = ΔL/L, where L and ΔL are the initial length and the stretched length of the PDMS substrate, respectively.…”

Section: Fabrication and Characterization Of Wrinkledmentioning

confidence: 99%

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Ultra-sensitive, Multi-directional Flexible Strain Sensors Based on an MXene Film with Periodic Wrinkles

Yang

Song

Zhou

et al. 2023

ACS Appl. Mater. Interfaces

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The fast-growing motion capturing/monitoring technique has raised a great demand for flexible strain sensors. For capturing complex motions (e.g., facial motion), both the strain amplitude and direction should be accurately detected. Although some reported sensors based on anisotropic conductive networks are proved to show accurate localization of strain directions, it is still a great challenge to achieve both high sensitivity and a high sensing range in these designs. Here, a self-assembled Ti 3 C 2 T x MXene film with parallel and periodic wrinkles is fabricated on a stretchable poly(dimethylsiloxane) substrate for constructing multidirectional strain sensors. During stretching, relative slip and crack will occur between the stacked MXene nanosheets, which contribute to high structural sensitivity in the MXene film. Meanwhile, the wrinkled structure contributes to high stretchability. As a result, the sensor based on the film with one-dimensional periodic wrinkles shows a large sensing range (>50%) and a gauge factor of 45. Furthermore, the sensor can accurately detect both the strain amplitude and direction by using the MXene film with two-dimensional wrinkles. It shows distinguishable electrical responses when detecting different-amplitude human/robot motions such as joint bending and walking. Additionally, the directions in complex human motions (e.g., facial motion) can also be well-tracked. This work provides an effective strategy to detect multi-directional motions.

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Section: Resultsmentioning

confidence: 99%

Section: Fabrication and Characterization Of Wrinkledmentioning

confidence: 99%