An ionic liquid based strain sensor for large displacement measurement

Keulemans, Grim; Ceyssens, Frederik; Puers, Robert

doi:10.1007/s10544-016-0141-4

Cited by 27 publications

(24 citation statements)

References 28 publications

(33 reference statements)

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“…This active electrode surface may be viewed as a composite, micro/nano designed surface. To provide practical value to the analysis, we studied a specific practical design configuration that we recently developed 29 . It should be emphasized that the NEME concept is applicable to both micro and nano scale because the dimensions of the gap between the electrodes could be, in principle, infinitesimal.…”

Section: Methodsmentioning

confidence: 99%

“…However, this method does not eliminate electrolysis in its entirety. Therefore, to completely eliminate electrolysis, we have designed a non-electrolytic micro/nano-electroporation (NEME) surface, in which the electroporation inducing electric fields are delivered to the target medium across a dielectric, with capacitive coupling 22 , 29 . Figure 1a and b shows a sectional schematic of a typical NEME surface.…”

Section: Introductionmentioning

confidence: 99%

“…While analyzing the “electric fields” generated for AC electroporation on the NEME surface described above 29 , we have observed that the attendant “electric field gradients” are reminiscent of those used in many microfluidic devices, for dielectrophoresis 33 – 39 . This raised the possibility that, while eliminating electrolysis during electroporation, our new non-electrolytic electroporation device may cause the simultaneous manifestation of dielectrophoresis and electroporation.…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous electroporation and dielectrophoresis in non-electrolytic micro/nano-electroporation

Lyu

Wang

Powell‐Palm

et al. 2018

Sci Rep

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It was recently shown that electrolysis may play a substantial detrimental role in microfluidic electroporation. To overcome this problem, we have developed a non-electrolytic micro/nano electroporation (NEME) electrode surface, in which the metal electrodes are coated with a dielectric. A COMSOL based numerical scheme was used to simultaneously calculate the excitation frequency and dielectric material properties dependent electric field delivered across the dielectric, fluid flow, electroporation field and Clausius-Mossotti factor for yeast and E. coli cells flowing in a channel flow across a NEME surface. A two-layer model for yeast and a three-layer model for E. coli was used. The numerical analysis shows that in NEME electroporation, the electric fields could induce electroporation and dielectrophoresis simultaneously. The simultaneous occurrence of electroporation and dielectrophoresis gives rise to several interesting phenomena. For example, we found that a certain frequency exists for which an intact yeast cell is drawn to the NEME electrode, and once electroporated, the yeast cell is pushed back in the bulk fluid. The results suggest that developing electroporation technologies that combine, simultaneously, electroporation and dielectrophoresis could lead to new applications. Obviously, this is an early stage numerical study and much more theoretical and experimental research is needed.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simultaneous electroporation and dielectrophoresis in non-electrolytic micro/nano-electroporation

Lyu

Wang

Powell‐Palm

et al. 2018

Sci Rep

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“…This elastic medium imparts high levels of flexibility and stretchability, while the dispersed carbon based conductive media, i.e., Multi-walled Carbon Nanotubes (MWCNTs), Graphene nano-platelets (GNP), and Carbon black (CB), explored within the scope of this article, imparts electrical conductivity. This architecture helps reducing the cracking and fluid flow induced fatigue over large strains in traditional piezoresistive based stretch sensor architecture [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The Development of Highly Flexible Stretch Sensors for a Robotic Hand

et al. 2018

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Demand for highly compliant mechanical sensors for use in the fields of robotics and wearable electronics has been constantly rising in recent times. Carbon based materials, and especially, carbon nanotubes, have been widely studied as a candidate piezoresistive sensing medium in these devices due to their favorable structural morphology. In this paper three different carbon based materials, namely carbon black, graphene nano-platelets, and multi-walled carbon nanotubes, were utilized as large stretch sensors capable of measuring stretches over 250%. These stretch sensors can be used in robotic hands/arms to determine the angular position of joints. Analysis was also carried out to understand the effect of the morphologies of the carbon particles on the electromechanical response of the sensors. Sensors with gauge factors ranging from one to 1.75 for strain up to 200% were obtained. Among these sensors, the stretch sensors with carbon black/silicone composite were found to have the highest gauge factor while demonstrating acceptable hysteresis in most robotic hand applications. The highly flexible stretch sensors demonstrated in this work show high levels of compliance and conformance making them ideal candidates as sensors for soft robotics.

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“…MWCNT/PDMS composite strain sensors can be manufactured by using two techniques i.e. shear mixing [15]and vacuum filtration [16].In shear mixing technique, MWCNT films are dissolved in the tetrahydrofuran (THF) solvent and sonicated in bath solicitor for 60 minutes. After that PDMS is mixed to the mixture by shear mixing to form the composite film.…”

Section: Using Polydimethylsiloxane (Pdms) Polymers[15] [16]mentioning

confidence: 99%

Research the Composite Strain Sensors for CNT/Polymer

2019

IJITEE

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CNT means carbon nanotube possess piezoelectric due to that behavior its electrical property changes even with the strain applied on the CNT is at the nanoscale. Due to the advantages of composite strain sensor like their multidirectional sensing capability, high strain sensitivity, high dynamic range, flexibility, and low mass density they are turning out to be an ultimate replacement to conventional strain sensors in various applications. CNT film can also be incorporated into the polymer to form a CNT/polymer composite strain sensor. Some of the most famous polymers employed to fabricate CNT/polymer composite strain sensors are thermoplastic polymers polymethyl methacrylate, polystyrene, etc., thermosetting polymers like epoxy resins, polyurethanes, etc., and polydimethylsiloxane (PDMS). The small addition of CNTs to polymer significantly increases their electromechanical properties by enhancing its tensile strength & young modulus, which in turn improves their sensing performance. CNT/polymer composite strain sensor exhibits better strain transfer, gauge factor, linearity, repeatability, and cost than that of pure CNT strain sensor. There are different factors which are affecting the performance of CNT/polymer composite strain sensor including quality and quantity of CNT filler particles in composite, type of fabrication technique adopted to form a composite, alignment and agglomerates of CNT in composite, cracks or defect in composite and environmental conditions. This paper reviews the performance of various different types of CNT/polymer composite strain sensors.

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An ionic liquid based strain sensor for large displacement measurement

Cited by 27 publications

References 28 publications

Simultaneous electroporation and dielectrophoresis in non-electrolytic micro/nano-electroporation

Simultaneous electroporation and dielectrophoresis in non-electrolytic micro/nano-electroporation

The Development of Highly Flexible Stretch Sensors for a Robotic Hand

Research the Composite Strain Sensors for CNT/Polymer

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