Graphene and Two-Dimensional Materials-Based Flexible Electronics for Wearable Biomedical Sensors

Joe, Daniel J.; Park, Eunpyo; Kim, Dong Hyun; Doh, Il; Song, Hyun Cheol; Kwak, Joon Young

doi:10.3390/electronics12010045

Cited by 5 publications

(5 citation statements)

References 132 publications

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“…However, any useful device from 2D materials should be based on planar technology rather than on the flakes exfoliated from small, individual single crystals. There exists a lot of research activity in the field of forthcoming 2D micro- and nano-electronics [ 43 ], including flexible electronics [ 44 , 45 ], sensors [ 46 , 47 ], overcoming the limitations for Moore’s law [ 48 ], etc. For graphene and hexagonal boron nitride, cheap CVD growth of large-scale materials is well developed.…”

Section: Discussion: Further Developmentmentioning

confidence: 99%

Inert-Atmosphere Microfabrication Technology for 2D Materials and Heterostructures

Duleba,

Pugachev,

Blumenau

et al. 2023

Micromachines

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Most 2D materials are unstable under ambient conditions. Assembly of van der Waals heterostructures in the inert atmosphere of the glove box with ex situ lithography partially solves the problem of device fabrication out of unstable materials. In our paper, we demonstrate an approach to the next-generation inert-atmosphere (nitrogen, <20 ppm oxygen content) fabrication setup, including optical contact mask lithography with a 2 μm resolution, metal evaporation, lift-off and placement of the sample to the cryostat for electric measurements in the same inert atmosphere environment. We consider basic construction principles, budget considerations, and showcase the fabrication and subsequent degradation of black-phosphorous-based structures within weeks. The proposed solutions are surprisingly compact and inexpensive, making them feasible for implementation in numerous 2D materials laboratories.

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Section: Discussion: Further Developmentmentioning

confidence: 99%

Inert-Atmosphere Microfabrication Technology for 2D Materials and Heterostructures

Duleba,

Pugachev,

Blumenau

et al. 2023

Micromachines

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“…Owing to their multitude of electronic structures, TMDCs show a range of electrical properties, including semiconducting, metallic, insulating, and superconducting characteristics. These unique features make the materials suitable to be utilized in electronic wearables. , …”

Section: Methodsmentioning

confidence: 99%

“…These unique features make the materials suitable to be utilized in electronic wearables. 393,394 Similar to the preparation of graphene, the production of TMDCs can be achieved through mechanical 395 and chemical 396 exfoliation methods. Since the discovery that the mechanical cleavage method can produce single-layer graphene, 34 it has been widely utilized to generate nanosheets of various lamellar crystals, including numerous TMDCs where the parent crystal is available.…”

Section: Transition Metal Dichalcogenidesmentioning

confidence: 99%

Transparent Electronics for Wearable Electronics Application

Won,

Bang,

Choi

et al. 2023

Chem. Rev.

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Recent advancements in wearable electronics offer seamless integration with the human body for extracting various biophysical and biochemical information for real-time health monitoring, clinical diagnostics, and augmented reality. Enormous efforts have been dedicated to imparting stretchability/flexibility and softness to electronic devices through materials science and structural modifications that enable stable and comfortable integration of these devices with the curvilinear and soft human body. However, the optical properties of these devices are still in the early stages of consideration. By incorporating transparency, visual information from interfacing biological systems can be preserved and utilized for comprehensive clinical diagnosis with image analysis techniques. Additionally, transparency provides optical imperceptibility, alleviating reluctance to wear the device on exposed skin. This review discusses the recent advancement of transparent wearable electronics in a comprehensive way that includes materials, processing, devices, and applications. Materials for transparent wearable electronics are discussed regarding their characteristics, synthesis, and engineering strategies for property enhancements. We also examine bridging techniques for stable integration with the soft human body. Building blocks for wearable electronic systems, including sensors, energy devices, actuators, and displays, are discussed with their mechanisms and performances. Lastly, we summarize the potential applications and conclude with the remaining challenges and prospects.

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“…Two-dimensional materials possess a distinctive crystal structure, outstanding mechanical properties, and novel physical attributes, making them highly versatile for various applications, including micro and nanoelectromechanical systems, and flexible electronic devices [44]. The elastic modulus, as a fundamental mechanical property of these materials, significantly influences device implementation and strain regulation.…”

Section: Mechanical Properties and Modificationmentioning

confidence: 99%

Electrical, optical and mechanical properties of monolayer MoTe₂ for applications in wearable optoelectronic devices

Zhang,

Zhao,

et al. 2024

Phys. Scr.

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Transition metal dichalcogenides (TMDs) have excellent optical and mechanical properties and has potential application value in wearable optoelectronic response devices. In this paper, MoTe2, a representative material of TMDs, is studied by first principles calculation. The results show that the MoTe2 monolayer has a direct band gap of 1.10eV in the eigenstate, which has a strong light absorption capacity, and can produce a high concentration of photogenerated charge carriers after light absorption. The material is soft in texture and exhibits the unique mechanical properties of layered materials. The effects of biaxial strain and defects on the properties of the materials were analyzed. The results show that the biaxial compression strain can enhance the light absorption curve of the material, enhance the light absorption of the photogenerated carrier, and expand the range of its energy distribution. The tensile strain decreases the value of the photoabsorbance curve and decreases the range of energy distribution of photogenerated carriers. The Mo vacancy defect increases the absorption curve value in the low energy region and broadens the optical response range of the material. The two types of vacancy defects both induce a "discrete" distribution of photogenerated carriers. The Mo vacancy has a significant effect on the elastic modulus and anisotropy properties of the material, resulting in the material changing from ductile to brittle. When Mo vacancy is added, the spatial distribution of elastic modulus of the material also changes greatly. Therefore, MoTe2 has potential application in the field of flexible optoelectronic devices, and its performance can be controlled by stress, vacancy.

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Graphene and Two-Dimensional Materials-Based Flexible Electronics for Wearable Biomedical Sensors

Cited by 5 publications

References 132 publications

Inert-Atmosphere Microfabrication Technology for 2D Materials and Heterostructures

Inert-Atmosphere Microfabrication Technology for 2D Materials and Heterostructures

Transparent Electronics for Wearable Electronics Application

Electrical, optical and mechanical properties of monolayer MoTe₂ for applications in wearable optoelectronic devices

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Graphene and Two-Dimensional Materials-Based Flexible Electronics for Wearable Biomedical Sensors

Cited by 5 publications

References 132 publications

Inert-Atmosphere Microfabrication Technology for 2D Materials and Heterostructures

Inert-Atmosphere Microfabrication Technology for 2D Materials and Heterostructures

Transparent Electronics for Wearable Electronics Application

Electrical, optical and mechanical properties of monolayer MoTe2 for applications in wearable optoelectronic devices

Contact Info

Product

Resources

About

Electrical, optical and mechanical properties of monolayer MoTe₂ for applications in wearable optoelectronic devices