Advancements in 2D flexible nanoelectronics: from material perspectives to RF applications

Zhu, Weinan; Park, Saungeun; Yogeesh, Maruthi N.; Akinwande, Deji

doi:10.1088/2058-8585/aa84a4

Cited by 43 publications

(45 citation statements)

References 84 publications

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“…and a large band-gap increase (due to quantum confinement effects) with dimensional/body thickness scaling below~5-10 nm [35,36,[124][125][126]. Thus, the high predicted mobilities and saturation velocities, coupled with its atomically thin nature, high optical transparency and mechanical flexibility, makes 2D MoS 2 very attractive for applications in ultra-scaled CMOS technologies as well as in flexible nanoelectronics and flexible "smart" systems [74,118,[127][128][129].…”

Section: Projected Performance Of 2d Mosmentioning

confidence: 99%

Progress in Contact, Doping and Mobility Engineering of MoS2: An Atomically Thin 2D Semiconductor

et al. 2018

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Atomically thin molybdenum disulfide (MoS2), a member of the transition metal dichalcogenide (TMDC) family, has emerged as the prototypical two-dimensional (2D) semiconductor with a multitude of interesting properties and promising device applications spanning all realms of electronics and optoelectronics. While possessing inherent advantages over conventional bulk semiconducting materials (such as Si, Ge and III-Vs) in terms of enabling ultra-short channel and, thus, energy efficient field-effect transistors (FETs), the mechanically flexible and transparent nature of MoS2 makes it even more attractive for use in ubiquitous flexible and transparent electronic systems. However, before the fascinating properties of MoS2 can be effectively harnessed and put to good use in practical and commercial applications, several important technological roadblocks pertaining to its contact, doping and mobility (µ) engineering must be overcome. This paper reviews the important technologically relevant properties of semiconducting 2D TMDCs followed by a discussion of the performance projections of, and the major engineering challenges that confront, 2D MoS2-based devices. Finally, this review provides a comprehensive overview of the various engineering solutions employed, thus far, to address the all-important issues of contact resistance (RC), controllable and area-selective doping, and charge carrier mobility enhancement in these devices. Several key experimental and theoretical results are cited to supplement the discussions and provide further insight.

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Section: Projected Performance Of 2d Mosmentioning

confidence: 99%

Progress in Contact, Doping and Mobility Engineering of MoS2: An Atomically Thin 2D Semiconductor

et al. 2018

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“…Semiconducting materials (Figure d–f) are essential in current‐modulation switches, ranging from transistor‐based sensors to bioinspired synaptic devices . 1D carbon nanotubes and atomically thin 2D materials have been integrated as semiconductors in flexible transistors. Semiconducting polymers with dynamic hydrogen bonds enable robust transistors that are stretchable and repairable by solvent and thermal treatments …”

Section: Sensor Materialsmentioning

confidence: 99%

Flexible Pressure Sensors for Objective Assessment of Motor Disorders

Amit

Chukoskie

Skalsky

et al. 2019

Adv Funct Materials

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Monitoring body motion is relevant to motor control disorders as well as assessment of fine motor skills in child development. Furthermore, motion tracking is necessary for rehabilitation monitoring and injury prevention and benefits both sick and healthy individuals. Flexible pressure sensors based on resistors, capacitors, inductors, or transistors are reviewed in the context of healthcare measurements, ranging from physiological signals to body movement characteristics such as grip and gait. To demonstrate the use of flexible pressure sensors for motor assessment, a touch sensing glove that evaluates fine motor skills in autism research is developed. The results show that autistic children perform fewer taps per minute compared to typically developing children, with larger variations in tap durations. In a second example, a force and motion sensing glove is developed to assess spasticity, a neuromuscular disorder that causes muscle stiffness/resistance and jerky movement. Analyses of force versus velocity show movement-dependent muscle resistance in a patient with spasticity. Through these flexible sensor systems, the shift from subjective scores to objective measurement will promote better diagnosis and dramatically improve the accuracy in tracking patient response to therapy.patients doing certain movements, and then clinicians rank each patient's level according to qualitative descriptions in benchmark classification scales. [12,13] The subjective scores can be inconsistent between raters and do not capture finelevel changes in a patient's progress in response to therapy. Therefore, there is a critical need to tackle the issue of imprecise assessment of motor disorders.With recent advances in flexible sensors and innovations in tactile sensing, [14][15][16][17][18][19] we have new low-cost technologies that are prime to facilitate quantitative evaluation of motor control. This progress report presents current developments in wearable sensor systems applicable to motor disorders, so that consistent, objective metrics become available to accurately track whether a treatment effectively relieves symptoms. The wearable sensors are not limited to placement on patients but can also be worn by clinicians or caregivers to assist them in taking measurements during patient interactions. [20,21] The point-of-care sensor systems will allow frequent monitoring, which is highly desirable to offer a better understanding of the patient's short and long-term response to therapies, to tailor treatment and improve outcome and quality of life for patients.Other reviews [14][15][16][17][18][19] have already extensively covered the flexible materials and devices used in tracking vital signs and electronic skin applications. In light of that, this progress report focuses on the applications in monitoring motor skills, in particular to implement pressure sensor designs for wearable systems with diverse form factors, for instance, gloves, [20,22,23] epidermal tags tags, [24,25] and shoe insoles. [26,27] We will discuss the mechanis...

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“…These techniques are affordable, versatile, economical, and waste-free that can signi cantly simplify the development manufacturing process and reduce production costs [1,2,3]. In addition, there is possibility to apply a wide range of substrates, including exible, because such technologies are low-energy and do not require heating the substrates up to thermal degradation [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Selenium Precursors on Structural Characteristics and Chemical Composition of Cu2ZnSnSe4 Nanocrystals

Kakherskiy

Pshenychnyi

Dobrozhan

et al. 2021

Preprint

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In the presented work Cu2ZnSnSe4 nanocrystals have been synthesized by the polyol method. The chemical composition, morphological, structural, and microstructural properties of Cu2ZnSnSe4 nanocrystals depending on synthesis temperature and time as well as precursor composition have been thoroughly investigated using scanning and transmission electron microscopies, energy dispersive X-ray analysis, X-Ray diffraction, FTIR spectroscopy. We compared the properties of nanocrystals synthesized from different precursors containing selenourea or amorphous selenium as a source of selenium and then determined the optimal conditions for nanocrystals synthesis. It was found that the optimal synthesis time for nanocrystals obtained using the first approach was t = (30-45) min, and for the second approach t = 120 min. It was also found that the optimal composition for the synthesis of single-phase Cu2ZnSnSe4 nanocrystals by the second approach is the molar ratio of precursors 2:1.5:1:4 and synthesis temperature T = 280 оС. Cu2ZnSnSe4 nanocrystals synthesized under optimal conditions were used to develop nanoinks for printing solar cell absorbers by 2D and 3D printers.

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Advancements in 2D flexible nanoelectronics: from material perspectives to RF applications

Cited by 43 publications

References 84 publications

Progress in Contact, Doping and Mobility Engineering of MoS2: An Atomically Thin 2D Semiconductor

Progress in Contact, Doping and Mobility Engineering of MoS2: An Atomically Thin 2D Semiconductor

Flexible Pressure Sensors for Objective Assessment of Motor Disorders

Effect of Different Selenium Precursors on Structural Characteristics and Chemical Composition of Cu2ZnSnSe4 Nanocrystals

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