A nanograting-based flexible and stretchable waveguide for tactile sensing

Wang, Peng; Liao, Quan; Song, Han

doi:10.1186/s11671-021-03488-0

Cited by 12 publications

(10 citation statements)

References 30 publications

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“…Therefore, it is necessary to develop an auxiliary interface to achieve accurate and controllable 3D human–machine interaction, in which a good choice is the flexible wearable tactile sensing interface that can be directly attached to the human arm. The reported tactile sensors are mainly based on the physical sensing principles of piezoresistance, − piezoelectricity, − capacitance, − and waveguides. − A tactile sensor array can convert an external force stimulation into measurable electrical signals and map them to corresponding sensing units. For example, Wang et al developed a triboelectric sensor array based on graphene for self-powered tactile sensing .…”

Section: Introductionmentioning

confidence: 99%

Electrooculography and Tactile Perception Collaborative Interface for 3D Human–Machine Interaction

Chang

et al. 2022

ACS Nano

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The human–machine interface (HMI) previously relied on a single perception interface that cannot realize three-dimensional (3D) interaction and convenient and accurate interaction in multiple scenes. Here, we propose a collaborative interface including electrooculography (EOG) and tactile perception for fast and accurate 3D human–machine interaction. The EOG signals are mainly used for fast, convenient, and contactless 2D (XY-axis) interaction, and the tactile sensing interface is mainly utilized for complex 2D movement control and Z-axis control in the 3D interaction. The honeycomb graphene electrodes for the EOG signal acquisition and tactile sensing array are prepared by a laser-induced process. Two pairs of ultrathin and breathable honeycomb graphene electrodes are attached around the eyes for monitoring nine different eye movements. A machine learning algorithm is designed to train and classify the nine different eye movements with an average prediction accuracy of 92.6%. Furthermore, an ultrathin (90 μm), stretchable (∼1000%), and flexible tactile sensing interface assembled by a pair of 4 × 4 planar electrode arrays is attached to the arm for 2D movement control and Z-axis interaction, which can realize single-point, multipoint and sliding touch functions. Consequently, the tactile sensing interface can achieve eight directions control and even more complex movement trajectory control. Meanwhile, the flexible and ultrathin tactile sensor exhibits an ultrahigh sensitivity of 1.428 kPa–1 in the pressure range 0–300 Pa with long-term response stability and repeatability. Therefore, the collaboration between EOG and the tactile perception interface will play an important role in rapid and accurate 3D human–machine interaction.

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Section: Introductionmentioning

confidence: 99%

Electrooculography and Tactile Perception Collaborative Interface for 3D Human–Machine Interaction

Chang

et al. 2022

ACS Nano

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“…The crystals produced as such showed a color change throughout the visible range at 29 % strain. Peng et al (2021) proposed a flexible and stretchable optical waveguide structure oriented towards tactile perception based on the related properties of optical waveguides and flexible optical materials. This structure showed a strain detection range of 0 %–12.5 % with an external force detection range of 0–23 × 10 –3 N. Li et al (2019) fabricated GaN photonic crystals and microdisks on flexible PDMS films by combining nano/microsphere lithography and laser lift-off techniques.…”

Section: Introductionmentioning

confidence: 99%

A flexible and stretchable photonic crystal film with sensitive structural color-changing properties for spoiled milk detection

et al. 2022

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“…From the ridge type, where the light is confined in two directions through channels of some tens of microns thicknesses [ 29 ], to planar guides of several centimetres where the light is confined in one direction of propagation. The integration of the light source, as well as the acquisition of the signal, can be achieved by direct contact with the edge of the waveguide [ 30 , 31 ] or at close proximity without contact by means of optical diffraction gratings [ 32 ]. The diffraction gratings are designed with a periodic structure in nanometric range.…”

Section: Introductionmentioning

confidence: 99%

Design, Fabrication and Characterisation of Multi-Parameter Optical Sensors Dedicated to E-Skin Applications

Fliegans

Troughton

Divay

et al. 2022

Sensors

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For many years there has been a strong research interest in soft electronics for artificial skin applications. However, one challenge with stretchable devices is the limited availability of high performance, stretchable, electrical conductors and semiconductors that remain stable under strain. Examples of such electronic skin require excessive amounts of wires to address each sensing element—compression force and strain—in a conventional matrix structure. Here, we present a new process for fabricating artificial skin consisting of an optical waveguide architecture, enabling wide ranging sensitivity to external mechanical compression and strain. The manufacturing process allows design of a fully stretchable polydimethylsiloxane elastomer waveguide with embedded gratings, replicated from low cost DVD-Rs. This optical artificial skin allows the detection of compression forces from 0 to 3.8 N with controllable sensitivity. It also permits monitoring of elongation deformations up to 135%. This type of stretchable optical sensor is highly robust, transparent, and presents a large sensing area while limiting the amount of wires connecting to the sensor. Thus, this optical artificial skin presents far superior mechanical properties compared to current electronic skin.

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A nanograting-based flexible and stretchable waveguide for tactile sensing

Cited by 12 publications

References 30 publications

Electrooculography and Tactile Perception Collaborative Interface for 3D Human–Machine Interaction

Electrooculography and Tactile Perception Collaborative Interface for 3D Human–Machine Interaction

A flexible and stretchable photonic crystal film with sensitive structural color-changing properties for spoiled milk detection

Design, Fabrication and Characterisation of Multi-Parameter Optical Sensors Dedicated to E-Skin Applications

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