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Graphene for Flexible Electronic Devices
Published in Suman Lata Tripathi, Parvej Ahmad Alvi, Umashankar Subramaniam, Electrical and Electronic Devices, Circuits and Materials, 2021
Stretchable multifunctional logic devices are heavily envisaged for bioelectronics and wearable electronics [42,43]. Graphene is a carbon nanomaterial with distinguished Young’s modulus because of the high degree of mechanical flexibility and strong atomic bonding [5]. Monoatomic thick honeycomb structure in 2D geometry with stretchable, flexible, and conformal characteristics make graphene the most suitable for a scalable commercial fabrication technology. Low temperature-enabled printing technology is used for the fabrication of graphene-based stretchable devices on not-so-usual substrates, for example, rubber balloon [5]. Graphene electronics printed on rubber substrates have degraded electrical properties because stretchable and porous substrates absorb different types of molecular species inducing significant scattering. Other potential applications of graphene include flexible biosensors, detachable graphene-based sensor attached to enamel of the dental for monitoring a patient’s health, and graphene-based bioelectronics devices for high-resolution electrophysiological imprints of brain cell activity at the brain–machine interface.
Techniques of Measurements of Linear and Nonlinear Optical Properties of Layered Nanomaterials for Applications in Photonics
Published in Tarun Kumar Gangopadhyay, Pathik Kumbhakar, Mrinal Kanti Mandal, Photonics and Fiber Optics, 2019
Pathik Kumbhakar, S. Biswas, A. K. Kole
Recently, with the introduction of the derivatives of hBN in graphene electronics, it is becoming very important to synthesize them with high crystalline quality and with controlled thickness. And it is required to improve the top down and bottom up techniques for the synthesis of different derivatives of hBN. It has been reported that different 2D BN nanostructures, such as monolayer BN nanosheets [135], BN nanoribbons [136] and BN nanomesh [137] exhibit improved physical, chemical and optoelectronic properties. The magnetic and electrical properties of BN nanoribbons and nanomesh are significantly different from nanosheets. As the aspect ratio (length/width ratio) of BN nanoribbons and BN nanomesh are different from BN nanosheets, the atoms which are exposed at the edge will certainly affect the magnetic and electronic behavior. Researchers have suggested manifold applications of the hBN and 2D BN derivatives due to their high thermal stability, low oxidation tendency and large specific surface area. Ag-BN nanoribbon nanohybrids [138] are produced from direct heating of organic metal salts with hBN, which show high SERS sensitivity. BN nanosheets are being used in catalysis, sensing, hydrogen storage and substrate for HR-TEM imaging [139].
Two-Dimensional-Based Hybrid Materials for Photocatalytic and Electrochemical Conversion from Carbon Dioxide to Hydrocarbon Fuels
Published in A. Pandikumar, K. Jothivenkatachalam, S. Moscow, Heterojunction Photocatalytic Materials, 2022
Karthik Kannan, Devi Radhika, Geetha Palani, L. Sivarama Krishna
Recently, graphene has appeared as the striking carbon allotrope because of its exclusive features and many exceptional properties. It has a higher specific surface area, high electron mobility, high mechanical strength, and stability. These properties are valuable in the electrochemical reduction reaction (ECR). Pristine graphene and GO are also inoperative near the ECR due to the unbiased carbon atoms that do not have the capability to stimulate CO2. However, single, dual, and multiple dopants like heteroatoms (B, N, and P) could noticeably transform the graphene electronics structure, which results in the activities in ECR [38].
Tension effect on the absorbance of a graphene layer
Published in Journal of Modern Optics, 2018
G. Khalandi, S. Roshan Entezar, A. Namdar
Recently, the strain effect on the device performance has been studied and the strain engineering has appeared in the graphene electronics [12,13]. The applied strain to a graphene layer (by compressing or stretching it out of the equilibrium) alters its band structure and may have important effects on the electronic and optical properties of the graphene. These effects depend on the strain modulus and the direction of the applied strain [13–16]. The types of the uniform strain in the graphene are shear strain, the compressive uniaxial strain and the tensile uniaxial strain (tension) [16].