Graphene Nanoelectronics

Westervelt, R. M.

doi:10.1126/science.1156936

Cited by 306 publications

(164 citation statements)

References 14 publications

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“…5 Applications of graphene could include the synthesis of graphene nanocomposites, graphene powder for use in electric batteries, solid state gas sensors and hydrogen storage * Author to whom correspondence should be addressed. devices, and even the possibility of room temperature ballistic transistors, 6 among others. A quite promising avenue of graphene nanotechnology is described in the broad realm of graphene based nanoelectronic devices, 7 and it has been suggested that this material may play a crucial role in the post-silicon world.…”

Section: Introductionmentioning

confidence: 99%

Graphene Nanocutting Through Nanopatterned Vacancy Defects

Jack¹,

Sen²,

Buehler³

2010

Jnl of Comp & Theo Nano

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The recent discovery of single graphene sheets and the remarkable technologies envisioned for graphene-based materials necessitate the ability to assemble and reproduce nano-precise graphene structures. Here we demonstrate an approach to create atomically precise single graphene structures by applying tensile load to single sheets of graphene that feature specific patterns of vacancies. We report a computational nanoengineering approach that utilizes the first principles based reactive force field potential (ReaxFF), applied here to simulate the fracture mechanics of up to 40,000 fully reactive atoms. We find that the direction and dynamical behavior of graphene fracture can be controlled by the presence of atomistic defects in the form of atomic vacancies placed throughout the sheet. We find that these vacancies produce distinct effects on the resulting fracture surface geometries, defined by the specific patterns in which they occur throughout the 2D structure. For instance, we are able to cut graphene sheets along controlled zigzag patterns on the nanoscale using specific arrangements of vacancies. These findings suggest novel possibilities aimed at cutting and producing atomically precise graphene structures, enabling advances in graphene nanotechnology. The study reported here is the first to apply ReaxFF to model fracture of graphene sheets.

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Section: Introductionmentioning

confidence: 99%

Graphene Nanocutting Through Nanopatterned Vacancy Defects

Jack¹,

Sen²,

Buehler³

2010

Jnl of Comp & Theo Nano

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“…To overcome this challenge, researchers have been trying to embed these NPs in an easily separated substrate, the most typical substrate is carbon due to its low cost and high specific surface area. 37,41,42 Graphene and graphene oxide have shown many applications in nanoelectronics, 43 sensors 44,45 and composites materials. [46][47][48] With a large dimension in XY plane reaching several micrometers and extremely thin thickness (nanometer) in Z-axis, graphene has large specific surface area and possesses great advantages to be a perfect platform for fixing NPs.…”

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confidence: 99%

Magnetic Graphene Nanoplatelet Composites toward Arsenic Removal

Zhu

Sadu

Wei

et al. 2012

ECS J. Solid State Sci. Technol.

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Magnetic graphene nanoplatelet composites (MGNCs) decorated with core-shell Fe-Fe 2 O 3 nanoparticles (NPs) have been synthesized using a facile one-pot thermal decomposition method. The graphene nanoplatelets (GNPs) decorated with uniformly dispersed NPs are observed to exhibit a strong magnetization and can be magnetically separated from the liquid mixture by a permanent magnet. These MGNCs demonstrate an effective and efficient adsorption of arsenic(III) in the polluted water due to the increased adsorption sites in the presence of magnetic NPs. The adsorption behavior is well fitted with both Langmuir and Freundlich models, which show a significantly higher adsorption capacity (11.34 mg/g) than the other adsorption values reported on the conventional iron oxide based adsorbents (∼1 mg/g). The results show a nearly complete As(III) removal within 1 ppb. © 2012 The Electrochemical Society. [DOI: 10.1149/2.010201jss] All rights reserved.Manuscript received March 8, 2012. Published July 17, 2012 Arsenic is known for its toxicity and carcinogenicity to human beings, 1-3 the contaminated water with arsenic is becoming a significantly increasing issue in drinking water throughout the world. Longterm exposure to arsenic can cause cancers of the bladder, lungs, skin, kidney, liver and prostate. 4 Arsenic contaminates include both natural and anthropogenic sources. Anthropogenic arsenic pollutants originate from mining and smelting of non-ferrous metals, burning of fossil fuels, usage of arsenic-containing pesticides in the agriculture 5 and arsenic-containing chemicals in the preservation of timber.6 Arsenic can exit in both inorganic and organic forms. In general, inorganic arsenic compounds are more toxic than organic arsenic compounds, and arsenite [As(III)] is considerably more mobile and toxic than arsenate [As(V)].7 Arsenate (i.e., HAsO 4 2− ) is the primary anion in the aerobic surface water and arsenite (i.e., H 3 AsO 3 or H 2 AsO 3 − ) is the primary species in the ground water. The actual valence states and chemical form, however, depend on the redox environments in the water systems including pH, oxidation-reduction potential, and the presence of complexing ions. There are several requirements that need to be met for arsenic removal such as safe and easy operation, high efficiency and low cost.7 Compared to the conventional water treatment techniques including oxidation/precipitation, 21 membrane/reverse osmosis, coagulation/coprecipitation, 22 and ion exchange, 7 adsorption has the following advantages. For example, it does not need a large volume or additional chemicals for treatment and it is easier to be deployed * Electrochemical Society Active Member.z E-mail: suying.wei@lamar.edu; zhanhu.guo@lamar.edu as a Point of Entry/Point of Use (POE/POU) arsenic removal process. Moreover, adsorption processes produce no sludge as met in the coagulation approach 7 and it does not need a strict control of pH values as met in the oxidation process.23 Adsorption can be dealt with low cost medium, low-tech operatio...

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“…Due to the complex conductivity, equivalent circuit including a resistor and a capacitor or an inductor may be considered. Graphene is suitable for realizing transistor actions due to High intrinsic carrier mobility and speed [13,14,15]. Recently, graphene has been utilized for devising subharmonic resistive mixers [16].…”

Section: Introductionmentioning

confidence: 99%

Realization of THz Band Mixer Using Graphene

Mizuji¹,

Abdolali²,

Aghamohamadi³

et al. 2014

AEM

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In this article a new method for creating mixer component in infrared and THz is suggested. Since the nonlinear property of admittance creates frequency components that do not exist in the input signal and the electrical conductivity is associated with admittance, in our work we have proven and simulated that the nonlinear property of graphene admittance can produce mixer component. The simulation results show that the mixer component is larger than other components, therefore the mixer works properly. Because of nano scale of graphene structure, this method paves the road to achieve super compact circuits.

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Graphene Nanoelectronics

Cited by 306 publications

References 14 publications

Graphene Nanocutting Through Nanopatterned Vacancy Defects

Graphene Nanocutting Through Nanopatterned Vacancy Defects

Magnetic Graphene Nanoplatelet Composites toward Arsenic Removal

Realization of THz Band Mixer Using Graphene

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