Piezoresistive Strain Sensors and Multiplexed Arrays Using Assemblies of Single-Crystalline Silicon Nanoribbons on Plastic Substrates

Won, Sang Min; Kim, Hoon‐Sik; Lu, Nanshu; Kim, Dae-Gon; Solar, C. Del; Duenas, Terrisa; Ameen, Abid; Rogers, John A.

doi:10.1109/ted.2011.2164923

Cited by 72 publications

(52 citation statements)

References 15 publications

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“…S25 (pressure applied locally on the device). The value of G extracted in this manner for the case of R 0 = 29.3 kilohms is in the range of ~50, comparable to intrinsic values expected for boron-doped silicon (2, 41). …”

Section: Methodssupporting

confidence: 74%

Battery-free, wireless sensors for full-body pressure and temperature mapping

et al. 2018

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Thin, soft, skin-like sensors capable of precise, continuous measurements of physiological health have broad potential relevance to clinical health care. Use of sensors distributed over a wide area for full-body, spatiotemporal mapping of physiological processes would be a considerable advance for this field. We introduce materials, device designs, wireless power delivery and communication strategies, and overall system architectures for skin-like, battery-free sensors of temperature and pressure that can be used across the entire body. Combined experimental and theoretical investigations of the sensor operation and the modes for wireless addressing define the key features of these systems. Studies with human subjects in clinical sleep laboratories and in adjustable hospital beds demonstrate functionality of the sensors, with potential implications for monitoring of circadian cycles and mitigating risks for pressure-induced skin ulcers.

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Section: Methodssupporting

confidence: 74%

Battery-free, wireless sensors for full-body pressure and temperature mapping

et al. 2018

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“…3 A and B, SI Appendix, and SI Appendix, Fig. S7) Information on related flexible devices appears elsewhere (50). Mounting such strain-sensing webs on ∼0.3-mm-thick silicone substrates finalizes the fabrication (Fig.…”

Section: Resultsmentioning

confidence: 99%

Electronic sensor and actuator webs for large-area complex geometry cardiac mapping and therapy

Kim

Ghaffari

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

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Curved surfaces, complex geometries, and time-dynamic deformations of the heart create challenges in establishing intimate, nonconstraining interfaces between cardiac structures and medical devices or surgical tools, particularly over large areas. We constructed large area designs for diagnostic and therapeutic stretchable sensor and actuator webs that conformally wrap the epicardium, establishing robust contact without sutures, mechanical fixtures, tapes, or surgical adhesives. These multifunctional web devices exploit open, mesh layouts and mount on thin, bio-resorbable sheets of silk to facilitate handling in a way that yields, after dissolution, exceptionally low mechanical moduli and thicknesses. In vivo studies in rabbit and pig animal models demonstrate the effectiveness of these device webs for measuring and spatially mapping temperature, electrophysiological signals, strain, and physical contact in sheet and balloon-based systems that also have the potential to deliver energy to perform localized tissue ablation.flexible electronics | semiconductor nanomaterials | stretchable electronics | implantable biomedical devices | cardiac electrophysiology C ardiac arrhythmias occur in all component structures and 3D regions of the heart, resulting in significant challenges in diagnosis and treatment of precise anatomic targets (1). Many common arrhythmias, including atrial fibrillation and ventricular tachycardia, originate in endocardial substrates and then propagate in the transverse direction to affect epicardial regions (1, 2). Characterizing arrhythmogenic activity at specific regions of the heart is thus critical for establishing the basis for definitive therapies such as cardiac ablation (3). Advanced tools that offer sufficient spatial resolution (<1 mm) and intimate mechanical coupling with myocardial tissue, but without undue constraints on natural motions, would therefore be of great clinical importance (4-6). To date, cardiac ablation procedures have largely relied on point ablation catheters deployed in the endocardial space (1, 5, 7-9). Although successful in the treatment of simple arrhythmias originating in and around the pulmonary veins, these devices are poorly suited for treating complex arrhythmias, such as persistent atrial fibrillation (10-13), that arise from various sites inside the left atrium. Other classes of devices have demonstrated the utility of spatiotemporal voltage mapping using various modes of operation, including noninvasive surface mapping designs (14, 15), epicardial voltage-mapping "socks" (16-20), and endocardial contact and noncontact catheters, with densities approaching 64 electrodes (21-31). These solutions all exploit arrays of passive metal wirebased electrodes integrated on wearable vests and socks (14-20) or catheter systems (21-26) for mapping of complex arrhythmias. Building such mesh structures requires manual assembly and is only possible because the individual wires are millimeter scale in diameter and thus sufficiently large to be threaded to form a mesh.Fo...

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“…This resistance sensitivity to strain makes the cracked Ti film on PDMS substrate applicable to a strain sensor that can operate in the high- and broad-strain range. In this case, the sample gives the normalized resistance change to the unit strain change (so-called gauge factor), ∆ R /( R 0 · ∆ ϵ ) = 2.0, which is comparable to the values of conventionally used metals such as Cu, constantan, and Ag [10,25,26]. In contrast to the conventional strain-sensing materials of which ultimate strain is limited to <1%, the cracked Ti film on the elastomeric substrate shows much higher strain tolerances up to 50% and a broader sensing range of 30 to 50%.…”

Section: Resultsmentioning

confidence: 96%

Cracked titanium film on an elastomeric substrate for highly flexible, transparent, and low-power strain sensors

Noh

2013

Nanoscale Res Lett

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Strain-dependent cracking behaviors in thin titanium (Ti) films on polydimethylsiloxane (PDMS) substrates were systematically investigated for their application to sensitive, flexible, transparent, and portable strain sensors. When uniaxially elongated, vertical cracks were developed in the low-strain range, and beyond a critical strain, tilted cracks appeared to intersect the vertical cracks. The cracking behaviors were also dependent on Ti film thickness. The varying strain-dependent crack patterns produced a significant resistance change in response to the applied strain, particularly, in the high- and broad-strain range. For a 180-nm-thick Ti film on PDMS substrate, a gauge factor of 2 was achieved in the range of 30% to 50% strain. The operation power was extremely low. All the Ti films on PDMS substrates were transparent, highly flexible, and very easy to fabricate. These results suggest that cracked Ti films on PDMS substrates could be a viable candidate for realizing a low-cost, flexible, transparent, and portable strain sensor.

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Piezoresistive Strain Sensors and Multiplexed Arrays Using Assemblies of Single-Crystalline Silicon Nanoribbons on Plastic Substrates

Cited by 72 publications

References 15 publications

Battery-free, wireless sensors for full-body pressure and temperature mapping

Battery-free, wireless sensors for full-body pressure and temperature mapping

Electronic sensor and actuator webs for large-area complex geometry cardiac mapping and therapy

Cracked titanium film on an elastomeric substrate for highly flexible, transparent, and low-power strain sensors

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