Potential of Printed Electrodes for Electrochemical Impedance Spectroscopy (EIS): Toward Membrane Fouling Detection

Goh, Guo Liang; Tay, Ming Feng; Lee, Jia Min; Ho, Jia Shin; Sim, Lee Nuang; Yeong, Wai Yee; Chong, Tzyy Haur

doi:10.1002/aelm.202100043

Cited by 34 publications

(19 citation statements)

References 212 publications

(315 reference statements)

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“…Further, SF shows to be a good material for the encapsulation of ITO, which makes samples potentially applicable for bioelectronics, 52 biosensing, 53,54 and sustainable printed electronics. 55 The 10 wt % ITO samples have a proper combination of mechanical stability, optical transparency, and dielectric response, which make them interesting for capacitive sensing. Thus, a capacitive touch sensor has been designed and tested.…”

Section: Resultsmentioning

confidence: 99%

Silk Fibroin Nanocomposites with Indium Tin Oxide toward Sustainable Capacitive Touch Sensing Applications

Reizabal

Castro

Pereira

et al. 2022

ACS Appl. Electron. Mater.

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The development of multifunctional sustainable polymer composites is an increasing need in the scope of the Internet of Things (IOT) and the circular economy paradigm. In this context, nanocomposites based on silk fibroin (SF) and indium tin oxide (ITO) (up to 40 wt %) were produced by solvent casting to improve the mechanical and dielectric properties of the protein, and develop capacitive touch sensing devices. Samples with good filler dispersion, compact morphology, and optical transparency were obtained independently of the filler content. The structural conformation of ITO/SF nanocomposites and mechanical and dielectric properties are dependent on ITO content, with the dielectric constant reaching values of up to 10 for an ITO content of 40 wt %. On the other hand, the thermal transitions of samples are independent of the filler amount. ITO/SF nanocomposites with 10 wt % ITO content were used for capacitive touch sensor development. The excellent sensing behavior and reproducibility of the device demonstrate the suitability of the developed silk fibroin-based nanocomposites for sustainable electronic approaches.

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Section: Resultsmentioning

confidence: 99%

Silk Fibroin Nanocomposites with Indium Tin Oxide toward Sustainable Capacitive Touch Sensing Applications

Reizabal

Castro

Pereira

et al. 2022

ACS Appl. Electron. Mater.

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“…Cyclic voltammograms were obtained with voltages from 0 to 0.5 V at a scan rate of 0.1 V s −1 . Charging current was calculated from cyclic voltammograms performed between −0.2 and 0 V at different scan rates of 15,20,25,50,75,100,150,200,250,300,400, and 500 mV s −1 . The specific capacitance of the electrode was the linear slope of the charging current versus scan rate.…”

Section: Methodsmentioning

confidence: 99%

“…The CNTA on PDMS retained the electrode pattern (Figure S3, Supporting Information), and the vertically aligned carbon nanotubes (Figure 1d) were transformed into a plane-parallel orientation structure with carbon nanotube bundles overlapped with each other and their ends exposed at the recording sites (Figure 1e). Compared with randomly dispersed carbon nanotubes prepared by other manufacturing techniques, such as 3D printing, [15][16][17] the as-prepared CNTA is more free of impurities and additives (Figure S4, Supporting Information). The above structure endowed the CNTA with high electrical conductivity and large specific surface area.…”

Section: Design and Fabrication Of The Flexible Multifunctional Elect...mentioning

confidence: 99%

Carbon Nanotube Array‐Based Flexible Multifunctional Electrodes to Record Electrophysiology and Ions on the Cerebral Cortex in Real Time

Yang

Qian

Wang

et al. 2022

Adv Funct Materials

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Electrophysiology and neurochemicals such as Ca2+, K+, and Na+ on the cerebral cortex can synergistically reflect the neurophysiological states. Transparent electrodes have been reported to record electrocorticography (ECoG) and image Ca2+ on the cerebral cortex surface. However, Ca2+ imaging is unable to track extracellular changes correlated with neural activities such as anesthesia, and imaging techniques to monitor K+ and Na+ are yet unavailable. Here, a flexible multifunctional electrode (FME) based on carbon nanotube array is presented to record ECoG and extracellular ions of Ca2+, K+, and Na+. The FME exhibits both lower impedance and higher capacitance than that of conventional gold electrodes. It simultaneously shows stable ion‐sensing performance and long‐term biocompatibility. The FME realizes multi‐model recording of ECoG and extracellular ions on the cerebral cortex surface of rats, providing an effective detection method for brain science.

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“…[46,47] Additive manufacturing or 3D printing of electronics, on the other hand, overcomes these issues and allows for greater design and fabrication flexibility. [45,[48][49][50][51] Inkjet printing and aerosol jet printing are some of the commonly used 3D electronic printing techniques that are used for the fabrication of sensors, circuits, and electrical components. [52,53] Aerosol jet printing, in particular, has been shown to be capable of achieving high-resolution printing, which could potentially be used for the fabrication of high-density sensing nodes of the tactile sensor.…”

Section: Introductionmentioning

confidence: 99%

Ultra‐Low‐Cost, Crosstalk‐Free, Fast‐Responding, Wide‐Sensing‐Range Tactile Fingertip Sensor for Smart Gloves

Sinha

Goh

Yeong

et al. 2022

Adv Materials Inter

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humanoids, [8] rehabilitation devices, [9] and augmented and virtual reality. [10] The advent of the Internet of actions (IoA) is accelerating the mechanosensory revolution. [11][12][13][14][15] This is because mechanosensation is believed to be the core of it. Over the last few years, various types of mechanical tactile sensors have been fabricated to emulate the functions of mechanoreceptors found in human skin. Based on the underlying sensing principle, they can be classified as resistive, [16][17][18][19][20][21] capacitive, [22][23][24][25] inductive, [26][27][28] piezoelectric, [29][30][31] and optical types. [32][33][34] Resistive type mechanical tactile sensors, in particular, have some advantages, including low cost, good durability, and a simple structure. [35] However, current limitations of these sensors include small pressure measurement range, slow response time, and high hysteresis. The majority of reported resistive tactile pressure sensors have a high sensitivity at low pressures (less than 10 kPa), allowing for ultra-sensitive detection. [36][37][38][39][40][41] However, in applications such as object manipulation pressures produced are more than 10 kPa. At high pressures (greater than 10 kPa), the sensitivity of these tactile sensors declines dramatically. The slow response time of these sensors (typically more than 30 ms) is also an issue when it comes to their practical usage. [25,35,40,41] Maintaining high sensitivity more than or comparable to human skin in a wide pressure range with a fast response time is required.Another critical issue that needs to be addressed with current skin-inspired sensors is how to achieve multi-point sensing capability, which is the simultaneous detection of touch at multiple different locations within a sensor. This necessitates a higher density of sensing nodes on the sensor. However, increasing the density of sensing nodes beyond a certain limit has drawbacks. First, it increases the number of interconnecting wires. These interconnecting wires restrict the motion of the robotic artifact because they can get entangled during motion. Second, it corrupts the sensor output signals because of crosstalk between the neighboring interconnects. [42] Array-type tactile sensor designs do solve the problem of interconnecting wires to some extent but crosstalk between the sensing nodes is still an issue with the majority of previously reported tactile sensors. [43,44] A possible solution to this problem is optimizing the density of sensing nodes and carefully planning the spatial distribution of these sensing nodes on the sensor.Skin-inspired sensors are all the rage in robotic applications. They take inspiration from the human skin's sensory abilities and use their abilities to sense things like temperature and pressure. Herein, fabrication of ultra-low-cost (<$1.5), ultra-thin, wide range, and crosstalk-free skin-inspired tactile sensors is presented. The sensors consist of piezoresistive pressure sensing elements sandwiched between 3D printed silver nanoparticle electr...

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Potential of Printed Electrodes for Electrochemical Impedance Spectroscopy (EIS): Toward Membrane Fouling Detection

Cited by 34 publications

References 212 publications

Silk Fibroin Nanocomposites with Indium Tin Oxide toward Sustainable Capacitive Touch Sensing Applications

Silk Fibroin Nanocomposites with Indium Tin Oxide toward Sustainable Capacitive Touch Sensing Applications

Carbon Nanotube Array‐Based Flexible Multifunctional Electrodes to Record Electrophysiology and Ions on the Cerebral Cortex in Real Time

Ultra‐Low‐Cost, Crosstalk‐Free, Fast‐Responding, Wide‐Sensing‐Range Tactile Fingertip Sensor for Smart Gloves

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