Micro-strain sensing using wrinkled stiff thin films on soft substrates as tunable optical grating

Ma, Teng; Liang, Hanshuang; Chen, George; Poon, B.; Jiang, Hanqing; Yu, Hongbin

doi:10.1364/oe.21.011994

Cited by 55 publications

(35 citation statements)

References 28 publications

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“…One class of optical components often requiring submicrometer features are diffraction gratings which are already found a wide of range of applications in telecommunication and spectroscopy . The use of a flexible substrate, such as PDMS, offers the potential for tuning the grating's period and diffraction properties via mechanical deformation …”

Section: Mechanically Tunable Diffraction Gratingsmentioning

confidence: 99%

Stretchable and Tunable Microtectonic ZnO-Based Sensors and Photonics

Gutruf

Zeller

Walia

et al. 2015

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The concept of realizing electronic applications on elastically stretchable "skins" that conform to irregularly shaped surfaces is revolutionizing fundamental research into mechanics and materials that can enable high performance stretchable devices. The ability to operate electronic devices under various mechanically stressed states can provide a set of unique functionalities that are beyond the capabilities of conventional rigid electronics. Here, a distinctive microtectonic effect enabled oxygen-deficient, nanopatterned zinc oxide (ZnO) thin films on an elastomeric substrate are introduced to realize large area, stretchable, transparent, and ultraportable sensors. The unique surface structures are exploited to create stretchable gas and ultraviolet light sensors, where the functional oxide itself is stretchable, both of which outperform their rigid counterparts under room temperature conditions. Nanoscale ZnO features are embedded in an elastomeric matrix function as tunable diffraction gratings, capable of sensing displacements with nanometre accuracy. These devices and the microtectonic oxide thin film approach show promise in enabling functional, transparent, and wearable electronics.

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Section: Mechanically Tunable Diffraction Gratingsmentioning

confidence: 99%

Stretchable and Tunable Microtectonic ZnO-Based Sensors and Photonics

Gutruf

Zeller

Walia

et al. 2015

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“…The buckling of the stiff film/compliant substrate system has been treated as a desirable means of generating various self-organized patterns with intrinsic wavelengths [6][7][8]. It finds a broad range of potential applications in, for instance, the thin-film metrology [9,10], tunable optical gratings [11,12], and stretchable electronics which can undergo a considerable deformation with the internal stress being less than the material strength [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

From period-doubling to folding in stiff film/soft substrate system: The role of substrate nonlinearity

Zhuo

Zhang

2015

International Journal of Non-Linear Mechanics

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a b s t r a c tUniaxial compressed stiff films on soft substrates can evolve into the period-doubling and folding instabilities, beyond the onset of sinusoidal wrinkling. The substrate is modeled as a neo-Hookean solid with a pre-stretch prior to film attachment, and its nonlinearity is obtained. Both the pre-stretch and the external nominal strain imposed on the film/substrate system can induce different substrate nonlinearity, and thus have different effects on the post-buckling mode evolution of the system. This study shows that the critical strain of period-doubling instability is linear to the pre-stretch. As the compressive nominal strain increases, the folding mode occurs beyond the onset of period-doubling in both the pre-tension and the pre-compression case, due to the softening/hardening effects for the inward/outward displacements generated by the positive substrate nonlinearity.

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“…The calculated results of the Young's modulus of the coating showed quite good agreement with one measured by a conventional indentation method. The similar approaches are used for high sensitive micro‐strain and pressure sensing ,…”

Section: Wrinkles On Soft Materialsmentioning

confidence: 97%

Responsive and Adaptive Micro Wrinkles on Organic‐Inorganic Hybrid Materials

Takahashi

2018

The Chemical Record

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A buckling induced wrinkling is a general phenomenon in daily life, which is induced by mechanical instability at the interface of multi-layered systems. Variety of applications have been proposed for wrinkles in nano to micrometer periodicity on the surface of soft materials. In recent decades, researchers are trying to use wrinkles for variety of sophisticated applications such as micro pattern fabrication, control of wettability, templating/directing substrate for elongated nano materials or virus, size-selective adsorption/desorption of functional objects, cells or microorganisms, delamination induced material fabrication such as micro-rolls, substrates for stretchable electronics, valves for microfluidic devices and soft actuators. Herein, recent advances on the fabrication and application of micro-wrinkles are reviewed.

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Micro-strain sensing using wrinkled stiff thin films on soft substrates as tunable optical grating

Cited by 55 publications

References 28 publications

Stretchable and Tunable Microtectonic ZnO-Based Sensors and Photonics

Stretchable and Tunable Microtectonic ZnO-Based Sensors and Photonics

From period-doubling to folding in stiff film/soft substrate system: The role of substrate nonlinearity

Responsive and Adaptive Micro Wrinkles on Organic‐Inorganic Hybrid Materials

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