scholarly journals On-surface synthesis of superlattice arrays of ultra-long graphene nanoribbons

2018 ◽  
Vol 54 (68) ◽  
pp. 9402-9405 ◽  
Author(s):  
Cesar Moreno ◽  
Markos Paradinas ◽  
Manuel Vilas-Varela ◽  
Mirko Panighel ◽  
Gustavo Ceballos ◽  
...  
Keyword(s):  
Graphene Nanoribbons ◽  
Graphene Nanoribbon

We report the on-surface synthesis of graphene nanoribbon superlattice arrays directed by the herringbone reconstruction of the Au(111) surface.

scholarly journals Vibrational signature of the graphene nanoribbon edge structure from high-resolution electron energy-loss spectroscopy

Nanoscale ◽  
2020 ◽  
Vol 12 (38) ◽  
pp. 19681-19688
Author(s):  
Nicola Cavani ◽  
Marzio De Corato ◽  
Alice Ruini ◽  
Deborah Prezzi ◽  
Elisa Molinari ◽  
...  
Keyword(s):  
High Resolution ◽  
Energy Loss ◽  
Electron Energy ◽  
Theoretical Investigation ◽  
Electron Energy Loss Spectroscopy ◽  
Graphene Nanoribbons ◽  
Graphene Nanoribbon ◽  
Edge Structure ◽  
Resolution Electron ◽  
Electron Energy Loss

A combined experimental and theoretical investigation of the vibrational signatures of on-surface synthesized graphene nanoribbons demonstrates the potentiality of HREELS in disclosing the details of their edge structure.

scholarly journals Graphene nanoribbon blends with P3HT for organic electronics

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 6301-6314 ◽  
Author(s):  
Mirella El Gemayel ◽  
Akimitsu Narita ◽  
Lukas F. Dössel ◽  
Ravi S. Sundaram ◽  
Adam Kiersnowski ◽  
...  
Keyword(s):  
Organic Electronics ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Graphene Nanoribbons ◽  
Graphene Nanoribbon ◽  
Solution Processed ◽  
Regioregular Poly ◽  
Effect Transistor

Solution processed 18 arm-chair graphene nanoribbons embedded in a matrix of regioregular poly(3-hexylthiophene) show improved photoconductivity and field-effect transistor performance.

scholarly journals A Study on Different Bandwidths and Rim Decorations’ Influence on the Mechanical Properties of Graphene Nanoribbon

2021 ◽  
Vol 2083 (2) ◽  
pp. 022108
Author(s):  
Guo Ziliang
Keyword(s):  
Mechanical Properties ◽  
Modulus Of Elasticity ◽  
Graphene Nanoribbons ◽  
Graphene Nanoribbon ◽  
First Principle ◽  
Ideal Strength ◽  
The Future ◽  
The Ideal

Abstract This paper structured the Graphene Nanoribbon with different bandwidths and rim decorations and obtained the ideal strength and modulus of elasticity based on the calculation under the First Principle. It can be known that the mechanical properties of Graphene Nanoribbon are close to that of graphene, which have less changes with different bandwidth. However, the mechanical properties would be influenced by different decorations which may change the electronic connection state of edge carbon atoms. The results found in this paper can provide some reference for researchers to study the mechanical properties of graphene nanoribbons in the future.

scholarly journals Acoustoelectric current in graphene nanoribbon due to Landau damping

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
K. A. Dompreh ◽  
K. W. Adu ◽  
D. Sakyi-Arthur ◽  
N. G. Mensah ◽  
S. Y. Mensah ◽  
...  
Keyword(s):  
Absorption Coefficient ◽  
Drift Velocity ◽  
Acoustic Phonon ◽  
Energy Gap ◽  
Graphene Nanoribbons ◽  
Graphene Nanoribbon ◽  
Phonon Energy ◽  
Landau Damping ◽  
Potential Candidate ◽  
Acoustoelectric Current

AbstractWe perform self-consistent analysis of the Boltzmann transport equation for momentum and energy in the hypersound regime i.e., $$ql \gg 1$$ q l ≫ 1 ($$q$$ q is the acoustic wavenumber and l is the mean free path). We investigate the Landau damping of acoustic phonons ($$LDOAP$$ LDOAP ) in graphene nanoribbons, which leads to acoustoelectric current generation. Under a non-quantized field with drift velocity, we observed an acoustic phonon energy quantization that depends on the energy gap, the width, and the sub-index of the material. An effect similar to Cerenkov emission was observed, where the electron absorbed the confined acoustic phonon energy, causing the generation of acoustoelectric current in the graphene nanoribbon. A qualitative analysis of the dependence of the absorption coefficient and the acoustoelectric current on the phonon frequency is in agreement with experimental reports. We observed a shift in the peaks when the energy gap and the drift velocity were varied. Most importantly, a transparency window appears when the absorption coefficient is zero, making graphene nanoribbons a potential candidate for use as an acoustic wave filter with applications in tunable gate-controlled quantum information devices and phonon spectrometers.

Transport of quasiparticles in coronene-based graphene nanoribbons

2020 ◽  
Vol 8 (35) ◽  
pp. 12100-12107 ◽  
Author(s):  
Marcelo Lopes Pereira Júnior ◽  
Bernhard Georg Enders Neto ◽  
William Ferreira Giozza ◽  
Rafael Timóteo Sousa Júnior ◽  
Geraldo Magela e Silva ◽  
...  
Keyword(s):  
Charge Density ◽  
Time Evolution ◽  
Graphene Nanoribbons ◽  
Graphene Nanoribbon

Time evolution of the charge density for a stable polaron in a coronene-based graphene nanoribbon.

Tuning the Electronic Properties of Symetrical and Asymetrical Boron Nitride Passivated Graphene Nanoribbons: Density Function Theory

2018 ◽  
Vol 54 ◽  
pp. 35-41
Author(s):  
Mohammad Bashirpour ◽  
Ali Kefayati ◽  
Mohammadreza Kolahdouz ◽  
Hossein Aghababa
Keyword(s):  
Boron Nitride ◽  
Band Gap ◽  
Density Function ◽  
Function Theory ◽  
Graphene Nanoribbons ◽  
Graphene Nanoribbon ◽  
Density Function Theory ◽  
Band Gaps ◽  
Asymmetrical Structure ◽  
Armchair Graphene

—Density function theory (DFT) based simulation combined with non-equilibrium green function (NEGF) was used to theoretically investigate electrical properties of symmetrical and asymmetrical boron nitride (BN) passivated graphene nanoribbons. Using density function theory method, it is demonstrated that the band gap of armchair (A) graphene nanoribbon (GNR) can be widened with boron nitride passivation. five symmetrical and five asymmetrical structures were considered, for which we obtained band gaps from 0.45 eV to 2 eV for symmetrical structures and 0.3 eV to 1.5 eV for asymmetrical structures. For the same width of graphene nanoribbon, our results showed that asymmetrical structure has a smaller band gap and almost the same conductance in comparison with the symmetrical one. Finally, comparison between the asymmetrical structure and the hydrogenated armchair graphene (h-AGNR) nanoribbon showed that, hBN-AGNR exhibited a higher conductance compared to an h-AGNR for the same width of GNR.

Layer-dependent catalysis of MoS2/graphene nanoribbon composites for efficient hydrodesulfurization

2017 ◽  
Vol 7 (3) ◽  
pp. 693-702 ◽  
Author(s):  
Lan Yang ◽  
Xuzhen Wang ◽  
Yang Liu ◽  
Zhengfa Yu ◽  
Rui Li ◽  
...  
Keyword(s):  
Graphene Nanoribbons ◽  
Single Layer ◽  
Catalytic Performance ◽  
Graphene Nanoribbon

Graphene nanoribbons (GNRs) with a defect-rich structure facilitate the preparation of a single-layer MoS2/GNR composite which shows superior catalytic performance than SL-MoS2/GS.

scholarly journals The improved electrochemical performance of cross-linked 3D graphene nanoribbon monolith electrodes

Nanoscale ◽  
2015 ◽  
Vol 7 (15) ◽  
pp. 6504-6509 ◽  
Author(s):  
Thazhe Veettil Vineesh ◽  
Subbiah Alwarappan ◽  
Tharangattu N. Narayanan
Keyword(s):  
Electrochemical Performance ◽  
Graphene Nanoribbons ◽  
Graphene Nanoribbon ◽  
Electrochemical Reactions ◽  
Cross Linking ◽  
3D Graphene ◽  
Chemical Cross Linking ◽  
3D Electrode

A novel 3D electrode using graphene nanoribbons (GNRs) is constructed using chemical cross-linking of 2D GNRs. The 3D electrode developed in this work outperformed its 2D counterpart in all the electrochemical reactions.

scholarly journals Electron Traversal Times in Disordered Graphene Nanoribbons

Entropy ◽  
2019 ◽  
Vol 21 (8) ◽  
pp. 737 ◽  
Author(s):  
Michael Ridley ◽  
Michael Sentef ◽  
Riku Tuovinen
Keyword(s):  
Rational Design ◽  
Graphene Nanoribbons ◽  
Graphene Nanoribbon ◽  
Free Time ◽  
Molecular Junctions ◽  
Transient Current ◽  
Time Dependent ◽  
Current Correlations

Using the partition-free time-dependent Landauer–Büttiker formalism for transient current correlations, we study the traversal times taken for electrons to cross graphene nanoribbon (GNR) molecular junctions. We demonstrate electron traversal signatures that vary with disorder and orientation of the GNR. These findings can be related to operational frequencies of GNR-based devices and their consequent rational design.

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