Flexible 3D Graphene Transistors with Ionogel Dielectric for Low‐Voltage Operation and High Current Carrying Capacity

Ameri, Shideh Kabiri; Singh, Pramod K.; D’Angelo, Anthony J.; Panzer, Matthew J.; Sonkusale, Sameer

doi:10.1002/aelm.201500355

Cited by 19 publications

(15 citation statements)

References 33 publications

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“…Ionic liquids, as with polymer material fillers, have garnered interest in recent years, due to their excellent properties, such as high dielectric permittivity, high conductivity, stability, nonvolatility, and nonflammability . Promising results relating to ionic liquids as fillers for enforcing polymer materials have been published.…”

Section: Introductionmentioning

confidence: 99%

Silicone Elastomers with High‐Permittivity Ionic Liquids Loading

Liu

Nie

et al. 2019

Adv Eng Mater

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The most obvious challenge facing current dielectric elastomers (DEs) is the high driving voltages necessary to activate them, and so, an effective way to overcome this shortcoming is to increase their dielectric permittivity. Herein, highpermittivity dielectric elastomer materials are prepared by synthesizing silicone elastomer loaded with ionic liquids (ILs). The influence of the structure and the amounts of ILs on the material properties is discussed, and important properties for material applications as DEs, such as dielectric permittivity, gel fraction, and mechanical properties, are also investigated. It is found that 1-butyl-3methylimidazolium hexafluoroantimonate (BmimSbF 6 ) is the most suitable IL for the given system. The dielectric permittivity of the material with 90 parts per hundred rubber (phr) BmimSbF 6 is 3.2 times higher than that of the pristine silicone elastomer, whereas the dielectric permittivity of pure silicone elastomer and elastomer loaded with ILs decreases in line with increased temperature in all cases. Young's modulus decreases in line with the increasing amount of BmimSbF 6 in the elastomer, as expected. A simpler figure of merit (F* om ) for actuators is used, and F* om of the elastomer with a 90 phr IL loading is 10.40, thereby indicating that the material has a great advantage when used in actuators.

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Section: Introductionmentioning

confidence: 99%

Silicone Elastomers with High‐Permittivity Ionic Liquids Loading

Liu

Nie

et al. 2019

Adv Eng Mater

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“…Doping ionogels with graphene in varying concentrations leads to condensed materials displaying higher conductivity. This underlying mechanism was attributed to decreased pore volume and internal surface area, which results in better interaction between ionogels and graphene . Most of these devices are fabricated using multistep and low‐yield processes such as free‐form and micromolding .…”

Section: D Graphene For Advanced Electronicsmentioning

confidence: 99%

3D Assembly of Graphene Nanomaterials for Advanced Electronics

Ferrand

Chabi

Agarwala

2020

Advanced Intelligent Systems

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Since the discovery of electricity and the creation of the first transistors two centuries ago, the field of electronics has evolved rapidly to become omnipresent. Today, electronic devices are challenged by new demands in function and performance: they are expected to be lightweight, highly efficient, flexible, smart, implantable, and so on. To meet these demands, the materials and components in devices need to be carefully selected and assembled together. In this regard, the controlled assembly of 3D graphene structures holds tremendous potential to achieve such levels of multifunctionality and outstanding properties. Advanced processing approaches, such as 3D printing, allow the fabrication of a variety of 3D graphene–based materials that present outstanding properties and a high degree of multifunctionality. Herein, the recent progress in the fabrication of graphene‐based devices for advanced electronics using controlled assembly is reported. The benefits of controlling the microstructure of graphene nanomaterials for enhanced properties and functionalities are highlighted, and the various fabrication methods and their implications on the organization of materials are reviewed, as well as selected electrical devices. The approaches described here are opening up new avenues for the fabrication of health or structural monitoring devices, autonomous machines, and interconnected objects.

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“…53 Although the higher mobility was obtained in common CVD-graphene based devices, the poor current modulation (I on /I off < 10) was observed simultaneously. 36,37,54,55 The small I on /I off value is mainly caused by the large off-state current (I off ), which could lead to inevitable static power consumption. It is known that static power consumption is comparable to dynamic power in modern silicon chips or even become dominating in the future.…”

Section: Characterizationsmentioning

confidence: 99%