Development of a flexible dry electrode based MXene with low contact impedance for biopotential recording

Peng, Huiling; Sun, Yue-ling; Bi, Chen; Li, Quan-Fu

doi:10.1016/j.measurement.2022.110782

Cited by 16 publications

(15 citation statements)

References 36 publications

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“…A research study reported a fabrication approach for the development of high-resolution neural interfaces, where the electrode arrays were fabricated based on 2D Ti 3 C 2 . This solution-processing method was scalable and reliable for the fabrication of various types of non-invasive neural interfaces for the monitoring of EEG signals [ 122 , 123 ]. The neural interface in this study [ 123 ] was a microelectrode with 16 channels where the 2D Ti 3 C 2 T x acted as the active sensing material.…”

Section: Two-dimensional Materials Beyond Graphenementioning

confidence: 99%

“…This solution-processing method was scalable and reliable for the fabrication of various types of non-invasive neural interfaces for the monitoring of EEG signals [ 122 , 123 ]. The neural interface in this study [ 123 ] was a microelectrode with 16 channels where the 2D Ti 3 C 2 T x acted as the active sensing material. The 2D Ti 3 C 2 T x films were spray-coated and patterned on parylene C substrates.…”

Section: Two-dimensional Materials Beyond Graphenementioning

confidence: 99%

“…The measurement of on-skin sensing capabilities of the micro sensors showed impedance values of ~29.78 ± 8.1 kΩ.cm 2 at the frequency of 1 kHz during the identification of muscle activation. The measured SNR of this sensor was in the range of 39–16 dB [ 123 ]. Subsequent fabrication technology enabled the arrangement of more complicated neural sensors for more practical applications with improved characteristics.…”

Section: Two-dimensional Materials Beyond Graphenementioning

confidence: 99%

See 2 more Smart Citations

Functional Two-Dimensional Materials for Bioelectronic Neural Interfacing

Akbari

Lopa

Shahriari

et al. 2023

JFB

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Realizing the neurological information processing by analyzing the complex data transferring behavior of populations and individual neurons is one of the fast-growing fields of neuroscience and bioelectronic technologies. This field is anticipated to cover a wide range of advanced applications, including neural dynamic monitoring, understanding the neurological disorders, human brain–machine communications and even ambitious mind-controlled prosthetic implant systems. To fulfill the requirements of high spatial and temporal resolution recording of neural activities, electrical, optical and biosensing technologies are combined to develop multifunctional bioelectronic and neuro-signal probes. Advanced two-dimensional (2D) layered materials such as graphene, graphene oxide, transition metal dichalcogenides and MXenes with their atomic-layer thickness and multifunctional capabilities show bio-stimulation and multiple sensing properties. These characteristics are beneficial factors for development of ultrathin-film electrodes for flexible neural interfacing with minimum invasive chronic interfaces to the brain cells and cortex. The combination of incredible properties of 2D nanostructure places them in a unique position, as the main materials of choice, for multifunctional reception of neural activities. The current review highlights the recent achievements in 2D-based bioelectronic systems for monitoring of biophysiological indicators and biosignals at neural interfaces.

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Section: Two-dimensional Materials Beyond Graphenementioning

confidence: 99%

Section: Two-dimensional Materials Beyond Graphenementioning

confidence: 99%

Section: Two-dimensional Materials Beyond Graphenementioning

confidence: 99%

See 1 more Smart Citation

Functional Two-Dimensional Materials for Bioelectronic Neural Interfacing

Akbari

Lopa

Shahriari

et al. 2023

JFB

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“…MXenes, in particular, the Ti 3 C 2 -MXene, has been used as electrode material for fabricating neural sensors for its high conductivity, biocompatibility, microfabrication, and aqueous processability . A Ti 3 C 2 T x -MXene high-density microelectrode-array thin-film sensor has been developed for noninvasive EMG, EEG, and EOG signal monitoring and detection. , The 16 microelectrode channel contained thin-film sensor (thickness ∼8 μm) was fabricated through integrating a spray-casting process to precisely pattern Ti 3 C 2 T x along with photolithography, e-beam deposition, and a lift-off process on the parylene C substrates . These microfabricated sensors showed excellent on-skin impedance of ∼29.78 ± 8.18 kΩ·cm 2 at 1 kHz with a high SNR of 39.23 ± 16.25 dB for identifying a distinct region of muscle activation by high-resolution mapping in the thenar eminence muscle group .…”

Section: Noninvasive Neural Interfacesmentioning

confidence: 99%

Thin-Film Electrodes Based on Two-Dimensional Nanomaterials for Neural Interfaces

Faisal

Iacopi

2022

ACS Appl. Nano Mater.

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Detection and monitoring of neural signals is a fastadvancing area of research expected to impact a broad range of advanced applications, from healthcare to brain−machine and even brain-to-brain communications. Two-dimensional (2D) layered materials, such as graphene, MXenes, and transition metal dichalcogenides, could lead to the development of superior and ultrathin thin-film electrodes for neural interfaces thanks to their atomic thickness, high-conductivity properties, and potential to combine additional functionalities. This review focuses on the recent advancement of 2D materials-based thin-film sensors for monitoring of bio-physiological signals using invasive and noninvasive approaches.

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“…Researchers have investigated and developed hardware and electrodes to optimize sensing performance. − To evaluate the sensors, testing has been traditionally performed on humans or animals, which gives rise to ethical issues and is labor intensive. Another main challenge of testing on living organs is that the true biopotential signal is unknown, and thus, it is difficult to evaluate the sensing performance without knowing the ground truth with which to compare the measured signal.…”

Section: Introductionmentioning

confidence: 99%

Skin and Artificial Skin Models in Electrical Sensing Applications

Ehtiati,

Eiler,

Bochynska

et al. 2023

ACS Appl. Bio Mater.

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Skin electrical properties play a significant role in recording biopotentials by using electrophysiological sensors. To test and evaluate sensor systems, it is commonly accepted to employ artificial skin models due to complications associated with testing on living tissues. The first goal of this Review is to provide a systematic understanding of the relation between skin structure and skin electrochemical behavior at an appropriate depth for electrophysiological sensing applications through a focus on skin structure, electrochemical properties of skin, and theoretical models (equivalent circuits) representing skin electrochemical behavior. The second goal is to review artificial skin models mimicking the electrochemical properties of skin and to give suggestions for future studies on relevant skin models based on a comparison between the behavior of skin and that of artificial skin models. The Review aims to help the reader to analyze the relation between the structure, elements of the equivalent circuits, and the resulting impedance data for both skin and artificial skin models.

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Development of a flexible dry electrode based MXene with low contact impedance for biopotential recording

Cited by 16 publications

References 36 publications

Functional Two-Dimensional Materials for Bioelectronic Neural Interfacing

Functional Two-Dimensional Materials for Bioelectronic Neural Interfacing

Thin-Film Electrodes Based on Two-Dimensional Nanomaterials for Neural Interfaces

Skin and Artificial Skin Models in Electrical Sensing Applications

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