Thermal AND Gate Using a Monolayer Graphene Nanoribbon

Pal, Souvik; Puri, Ishwar K.

doi:10.1002/smll.201303888

Cited by 32 publications

(20 citation statements)

References 44 publications

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“…[ 39 ] Furthermore, Pal and Puri realized the function of thermal logic gate based on two asymmetric graphene thermal diodes. [ 40 ] Subsequently, carbon‐based systems have been extensively studied in thermal management and energy field. [ 41–44 ] In addition, more and more carbon‐based materials are being discovered for their excellent performance.…”

Section: Figurementioning

confidence: 99%

Design of Thermal Metamaterials with Excellent Thermal Control Functions by Using Functional Nanoporous Graphene

Jia

Zhang

et al. 2020

Physica Rapid Research Ltrs

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Heat flux manipulation has garnered extensive research attention due to its potential application in thermal management devices, such as heat sink, [1,2] thermal diode, [3-6] thermal transistor, [7] and thermal memory. [8] Yet until now, we were not able to control heat flux as we do with electric current. Considerable effort of researchers to investigate possible transport mechanism of microscopic particles, such as photons [9] and phonons, [10-12] has led to some significant conclusions. For instance, in 2006, Leonhardt and Pendry. [13,14] established the transformation optics theory and proposed the concept of invisible cloak, which have also been verified by subsequent experiments. Inspired by this, in 2008, Fan et al. [15] first applied the transformation theory in the field of heat transfer, and theoretically predicted the mode of thermal invisible cloak based on graded thermal metamaterial, in which the thermal conduction equation remains form invariant under coordinate transformation. However, the adverse establishing conditions of transformation thermotics theory limit the practical implementation of thermal invisible cloak. Until 2012, Narayana and Sato [16] successfully fabricated a thermal invisible cloak by constructing a concentric layered structure consisting of alternating layers of two different homogeneous isotropic thermal conductivities. Since then, a variety of thermal metamaterials, including thermal cloak and thermal concentrator, have been proposed, and some of them have been experimentally realized, [17-25] paving the way for follow-up research. It is worth noting that these novel thermal phenomena in above-mentioned metamaterials are mostly based on macroscopic compound structures such as metal/polymer. Since 2004, significant research has been directed toward two-dimensional (2D) materials. [26-31] Graphene, as a representative 2D material, is considered as a promising candidate for next-generation electronic and optoelectronic devices due to its exceptional charge carrier mobility and 2D nature. [32-36] In addition, ultrahigh phonon-dominated thermal conductivity of graphene facilitates its use as heat sinks in integrated circuits. [1,2,37] Moreover, the fast response speed in graphene induced by large phonon group velocity can be applied in thermal devices performed with phonons. For example, Wang et al. studied the thermal rectification (TR) effect in asymmetrically defected graphene nanoribbon (GNR) and showed that singlevacancies and Si defects are more preferable in thermal rectifier fabrication. [38] A similar result has been obtained by experimental studies on asymmetrically defected GNR. [39] Furthermore, Pal and Puri realized the function of thermal logic gate based on two asymmetric graphene thermal diodes.

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Section: Figurementioning

confidence: 99%

Design of Thermal Metamaterials with Excellent Thermal Control Functions by Using Functional Nanoporous Graphene

Jia

Zhang

et al. 2020

Physica Rapid Research Ltrs

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“…Here, we only mentioned several important physical mechanisms for nanomaterials, while a large number of MD simulations have been published, especially for the two-dimensional materials. By designing asymmetric thickness [16], width [17][18][19], strain [20,21], and defect [22,23] graphene structures in the simulation, thermal rectification could be realized.…”

Section: Introductionmentioning

confidence: 99%

A Brief Review on the Recent Experimental Advances in Thermal Rectification at the Nanoscale

2019

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The concept of thermal rectification was put forward decades ago. It is a phenomenon in which the heat flux along one direction varies as the sign of temperature gradient changes. In bulk materials, thermal rectification has been realized at contact interfaces by manufacturing asymmetric effective contact areas, electron transport, temperature dependence of thermal conductivity and so on. The mechanism of thermal rectification has been studied intensively by using both experimental and theoretical methods. In recent years, with the rapid development of nanoscience and technology, the active control and management of heat transport at the nanoscale has become an important task and has attracted much attention. As the most fundamental component, the development and utilization of a nanothermal rectifier is the key technology. Although many research papers have been published in this field, due to the significant challenge in manufacturing asymmetric nanostructures, most of the publications are focused on molecular dynamics simulation and theoretical analysis. Great effort is urgently required in the experimental realization of thermal rectification at the nanoscale, laying a solid foundation for computation and theoretical modeling. The aim of this brief review is to introduce the most recent experimental advances in thermal rectification at the nanoscale and discuss the physical mechanisms. The new nanotechnology and method can be used to improve our ability to further design and produce efficient thermal devices with a high rectification ratio.

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“…Graphene, which is an atomically thin layer of carbon atoms in a honeycomb lattice, has extraordinary electronic and mechanical properties. Due to the linear dispersion at the k ‐point, high charge carrier mobility exceeding 200 000 cm 2 V −1 s −1 has been reported, promising low‐power electronics . However, graphene does not have any bandgap, limiting its use in semiconducting applications.…”

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confidence: 99%

Dielectric‐Screening Reduction‐Induced Large Transport Gap in Suspended Sub‐10 nm Graphene Nanoribbon Functional Devices

Schmidt

Muruganathan

Kanzaki

et al. 2019

Small

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The predicted quasiparticle energy gap of more than 1 eV in sub‐6 nm graphene nanoribbons (GNRs) is elusive, as it is strongly suppressed by the substrate dielectric screening. The number of techniques that can produce suspended high‐quality and electrically contacted GNRs is small. The helium ion beam milling technique is capable of achieving sub‐5 nm patterning; however, the functional device fabrication and the electrical characteristics are not yet reported. Here, the electrical transport measurement of suspended ≈6 nm wide mono‐ and bilayer GNR functional devices is reported, which are obtained through sub‐nanometer resolution helium ion beam milling with controlled total helium ion budget. The transport gap opening of 0.16–0.8 eV is observed at room temperature. The measured transport gap of the different edge orientated GNRs is in good agreement with first‐principles simulation results. The enhanced electron–electron interaction and reduced dielectric screening in the suspended quasi‐1D GNRs and anti‐ferromagnetic coupling between opposite edges in the zigzag GNRs substantiate the observed large transport gap.

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Thermal AND Gate Using a Monolayer Graphene Nanoribbon

Cited by 32 publications

References 44 publications

Design of Thermal Metamaterials with Excellent Thermal Control Functions by Using Functional Nanoporous Graphene

Design of Thermal Metamaterials with Excellent Thermal Control Functions by Using Functional Nanoporous Graphene

A Brief Review on the Recent Experimental Advances in Thermal Rectification at the Nanoscale

Dielectric‐Screening Reduction‐Induced Large Transport Gap in Suspended Sub‐10 nm Graphene Nanoribbon Functional Devices

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