Stretchable Optomechanical Fiber Sensors for Pressure Determination in Compressive Medical Textiles

Sandt, Joseph D.; Moudio, Marie; Clark, J. Kenji; Hardin, James O.; Argenti, Christian; Carty, Matthew J.; Lewis, Jennifer A.; Kolle, Mathias

doi:10.1002/adhm.201800293

Cited by 54 publications

(65 citation statements)

References 23 publications

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“…With the development of new nanofabrication methods, a variety of new materials have emerged, which show dramatic stimuli-responsive optical behaviours including tuneable colours and scattering properties 1 – 3 . Directed self-assembly has proven to be a highly promising route to control the organisation of a large variety of nano-photonic building blocks, ranging from colloids 4 , 5 to liquid crystals 6 – 8 and block-copolymers 9 , 10 .…”

Section: Introductionmentioning

confidence: 99%

Roll-to-roll fabrication of touch-responsive cellulose photonic laminates

et al. 2018

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Hydroxypropyl-cellulose (HPC), a derivative of naturally abundant cellulose, can self-assemble into helical nanostructures that lead to striking colouration from Bragg reflections. The helical periodicity is very sensitive to pressure, rendering HPC a responsive photonic material. Recent advances in elucidating these HPC mechano-chromic properties have so-far delivered few real-world applications, which require both up-scaling fabrication and digital translation of their colour changes. Here we present roll-to-roll manufactured metre-scale HPC laminates using continuous coating and encapsulation. We quantify the pressure response of the encapsulated HPC using optical analyses of the pressure-induced hue change as perceived by the human eye and digital imaging. Finally, we show the ability to capture real-time pressure distributions and temporal evolution of a human foot-print on our HPC laminates. This is the first demonstration of a large area and cost-effective method for fabricating HPC stimuli-responsive photonic films, which can generate pressure maps that can be read out with standard cameras.

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Section: Introductionmentioning

confidence: 99%

Roll-to-roll fabrication of touch-responsive cellulose photonic laminates

et al. 2018

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“…Research on physical sensing represents the largest contributor to the wearable sensors arena. In recent years, we have witnessed an explosive growth in the use of wearable physical sensors that can be woven onto garments, [148][149][150] adhered on garments [1,8,41,[151][152][153][154][155][156][157][158][159] or directly adhered to skin. [10][11][12][13][14][15][16]88,90,117,141,[159][160][161][162][163][164][165][166][167][168][169][170] Here, we first provide a brief overview of the physical sensing parameters possible on our body and the significance of them to health.…”

Section: Physical Sensing Platformsmentioning

confidence: 99%

“…[14,161,162,164,166,168,170,173] In addition, pressure is critical for compression therapy and pressure sensors can be integrated into compressive garments to facilitate pressure control. [149] Temperature is an importance indicator to the health condition of our body. Wearable temperature sensors measuring temperature on the skin [141,160,174] can be used to assess blood flow and hydration.…”

Section: Physical Sensing Platformsmentioning

confidence: 99%

“…The following example is a colorimetric sensor that can change color upon stretch, which was utilized by Kolle and co-workers to indicate pressure in the compressive bandage (Figure 10j). [149] The sensor is in fact a photonic fiber that is made by cladding a thin bilayer of PDMS and polystyrene-polyisoprene triblock copolymer a few times around an extruded PDMS fiber. This layered structure enables the fiber to reflect visible light according to the applied axial strain.…”

Section: Pressure Sensingmentioning

confidence: 99%

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Flexible Hybrid Sensors for Health Monitoring: Materials and Mechanisms to Render Wearability

et al. 2019

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.201902133.Wearable electronics have revolutionized the way physiological parameters are sensed, detected, and monitored. In recent years, advances in flexible and stretchable hybrid electronics have created emergent properties that enhance the compliance of devices to our skin. With their unobtrusive attributes, skin conformable sensors enable applications toward real-time disease diagnosis and continuous healthcare monitoring. Herein, critical perspectives of flexible hybrid electronics toward the future of digital health monitoring are provided, emphasizing its role in physiological sensing. In particular, the strategies within the sensor composition to render flexibility and stretchability while maintaining excellent sensing performance are considered. Next, novel approaches to the functionalization of the sensor for physical or biochemical stimuli are extensively covered. Subsequently, wearable sensors measuring physical parameters such as strain, pressure, temperature, as well as biological changes in metabolites and electrolytes are reported. Finally, their implications toward early disease detection and monitoring are discussed, concluding with a future perspective into the challenges and opportunities in emerging wearable sensor designs for the next few years. Wearable SensorsRecent progress in flexible and stretchable electronic systems has ignited exciting applications in consumer electronics, human computer interactions, augmented reality devices, and electronic skins. [1][2][3] Among these, a significant interest lies in health monitoring, [4][5][6] where vital functions may be measured continuously. Continuous health monitoring is far more superior than conventional healthcare workflow as the conventional approach can only offer snapshots of the physiological condition Figure 3. Material substrates for flexible and stretchable electronics, highlighting the advantages of choices for each material type. a) Common polymeric materials by order of glass transition temperatures. Reproduced with permission. [29] Copyright 2015, Elsevier. b) Schematic representation of crosslinked elastomeric substrates possessing configuration entropy. Reproduced with permission. [22]

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“…Sandt et al. also utilized mechanochromic fibers as sensors to indicate the applied pressure on wounds, [ 43 ] as inappropriate pressure exerted onto a patients hinders the recovery process and even causes additional damage. The achieved mechanochromic fibers were embedded into medical bandages to monitor applied pressure.…”

Section: Applications Of Mechanochromic Structural‐colored Materialsmentioning

confidence: 99%

Mechanochromism of Structural‐Colored Materials

Chen

Hong

2020

Advanced Optical Materials

131

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In comparison with pigmentary colors, structural colors are with superior chemical stability and are resistant to photobleaching, making them promising candidates for color displays. What is more, the use of toxic dyes can be avoided by utilizing structural-colored materials to display various hues. Structural colors are widespread in nature and observed in opals, [3] beetles, [4] tropical fish, [5] peacock feathers, [6] chameleons, and similar iridescent materials. [7-9] Along with the growing understanding of the morphology and mechanism of natural structural-colored materials, their artificial counterparts have been manufactured with improved performance and functions consequently. Emerging structural-colored materials can be divided into three main categories according to their nanoscale architectures: photonic crystals (PCs), [10] liquid crystals (LCs), [11] and photonic glass. [12] Due to their ability to modulate visible light, the structural-colored materials have been applied in diverse domains such as optical waveguides, [13-16] luminescence enhancement, [17-19] photo electric devices, [20,21] photocatalysts, [22,23] anti-counterfeiting technologies, [24-26] and chemical and biological sensing. [27-29] With ingenious designs of nanostructures, a variety of responsiveness has been obtained on the structural-colored materials, corresponding to varying stimuli such as temperature, [30-32] solvent, [27] gases, [28] magnetic fields, [33] and external forces. [10-12] Among them, the mechanical responsive structural colors are able to visualize invisible stress in the materials, providing effective indicators for mechanical stimuli such as stretching, compression, or bending. Such mechanochromism can be directly achieved by the deformation-induced changes in periodic lattice constants of the structural-colored materials. [34,35] Recently developed mechanochromic structuralcolored materials have extended the responsive functions from conventional mechanical stimuli to complex signals such as electric stimuli. [10] In addition, although the color shift is a predominant method to achieve mechanochromic behavior, [34-36] increasing efforts have been made to develop mechanochromism based on polarization and transparence. [11,37,38] As one of the rapidly developing intelligent materials with multiresponse, [34,39,40] mechanochromic structural-colored materials have become promising in various applications, such as mechanical sensing, [11,41] colorful displays, [10,42] anti-counterfeiting, [26,37] and healthcare materials. [43,44] In this review, we summarize recent advances in mechanochromic structural-colored materials as shown in Figure 1.

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Stretchable Optomechanical Fiber Sensors for Pressure Determination in Compressive Medical Textiles

Cited by 54 publications

References 23 publications

Roll-to-roll fabrication of touch-responsive cellulose photonic laminates

Roll-to-roll fabrication of touch-responsive cellulose photonic laminates

Flexible Hybrid Sensors for Health Monitoring: Materials and Mechanisms to Render Wearability

Mechanochromism of Structural‐Colored Materials

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