Self-Assembly Strategy for Fabricating Connected Graphene Nanoribbons

Han, Patrick; Akagi, Kazuto; Canova, Filippo Federici; Shimizu, Ryo; Oguchi, Hiroyuki; Shiraki, Susumu; Weiss, Paul S.; Asao, Naoki; Hitosugi, Taro

doi:10.1021/acsnano.5b04879

Cited by 84 publications

(114 citation statements)

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“…For example, consider the scheme for fabrication of graphene nanoribbons shown in Figure 1. [12][13][14][15] In this scheme, 10,10'-dibromo-9,9'-bianthracene (Br 2 BA) molecules are deposited onto a copper(111) (Cu(111)) surface ( Figure 1A), which then undergo a self-assembly process to form chain-shaped structures ( Figure 1B). Upon heating, a chemical reaction occurs and the chains transform into (3,1)-chiral edge graphene nanoribbons ( Figure 1C).…”

confidence: 99%

“…While the mechanism of this chemical reaction has not been rigorously determined, it is believed to involve a cyclodehydrogenation reaction. 13 However, in order for such a 'classical' chemical reaction to actually occur, the frontier orbitals of the Br 2 BA molecules in the chain must be relatively well defined, despite the expected strong hybridization of the frontier orbitals with the metal surface bands. For the case of van der Waals-adsorbed organic molecules, a Author to whom correspondence should be addressed.…”

confidence: 99%

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Substrate-molecule decoupling induced by self-assembly—Implications for graphene nanoribbon fabrication

Packwood

2018

AIP Advances

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Interactions between organic molecules and metal surfaces are often very strong, resulting in the loss of well-defined frontier orbitals on the molecule due to electronic hybridization with the surface. In this paper, we use theoretical calculations to show that the interaction between graphene nanoribbon precursor molecules and copper surfaces is weakened upon molecular self-assembly. This phenomenon, which we abbreviate as SAID (Self-Assembly Induced Decoupling), increases the adsorption distance of the molecules to the surface, and results in a partial recovery of frontier molecular orbital electron density. The SAID phenomenon opens a new topic in the field of organic-metal interface physics, and may have broader implications for thin film devices and catalysis.

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confidence: 99%

Substrate-molecule decoupling induced by self-assembly—Implications for graphene nanoribbon fabrication

Packwood

2018

AIP Advances

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“…In the study performed by Han et al, self-assembly fabricated GNRs were connected end to end. 19 Surface-assisted molecular assembly (SAMA) was used to synthesize and connect GNRs end to end both chemically and electronically. It was also mentioned that the Cu(111) substrate plays an important role for the molecules to form and connect the GNRs up to 50 nm long.…”

Section: A Synthesis and Fabrication Techniquesmentioning

confidence: 99%

Nanoribbons: From fundamentals to state-of-the-art applications

Yagmurcukardes

Peeters

Senger

et al. 2016

Applied Physics Reviews

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Atomically thin nanoribbons (NRs) have been at the forefront of materials science and nanoelectronics in recent years. State-of-the-art research on nanoscale materials has revealed that electronic, magnetic, phononic, and optical properties may differ dramatically when their one-dimensional forms are synthesized. The present article aims to review the recent advances in synthesis techniques and theoretical studies on NRs. The structure of the review is organized as follows: After a brief introduction to low dimensional materials, we review different experimental techniques for the synthesis of graphene nanoribbons (GNRs) with their advantages and disadvantages. In addition, theoretical investigations on width and edge-shape-dependent electronic and magnetic properties, functionalization effects, and quantum transport properties of GNRs are reviewed. We then devote time to the NRs of the transition metal dichalcogenides (TMDs) family. First, various synthesis techniques, E-field-tunable electronic and magnetic properties, and edge-dependent thermoelectric performance of NRs of MoS 2 and WS 2 are discussed. Then, strongly anisotropic properties, growth-dependent morphology, and the weakly width-dependent bandgap of ReS 2 NRs are summarized. Next we discuss TMDs having a T-phase morphology such as TiSe 2 and stable single layer NRs of mono-chalcogenides. Strong edge-type dependence on characteristics of GaS NRs, width-dependent Seebeck coefficient of SnSe NRs, and experimental analysis on the stability of ZnSe NRs are reviewed. We then focus on the most recently emerging NRs belonging to the class of transition metal trichalcogenides which provide ultra-high electron mobility and highly anisotropic quasi-1D properties. In addition, width-, edge-shape-, and functionalization-dependent electronic and mechanical properties of blackphosphorus, a monoatomic anisotropic material, and studies on NRs of group IV elements (silicene, germanene, and stanene) are reviewed. Observation of substrate-independent quantum well states, edge and width dependent properties, the topological phase of silicene NRs are reviewed. In addition, H 2 concentration-dependent transport properties and anisotropic dielectric function of GeNRs and electric field and strain sensitive I-V characteristics of SnNRs are reviewed. We review both experimental and theoretical studies on the NRs of group III-V compounds. While defect and N-termination dependent conductance are highlighted for boron nitride NRs, aluminum nitride NRs are of importance due to their dangling bond, electric field, and strain dependent electronic and magnetic properties. Finally, superlattice structure of NRs of GaN/AlN, Si/Ge, G/BN, and MoS 2 /WS 2 is reviewed. Published by AIP Publishing.

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“…Additionally, it has been reported that the GNRs could be interchain-linked via cross-dehydrogenative coupling. 26,27 These phenomena will be applicable to produce the covalently bonded π-conjugated 2D structures. However, the linked GNRs reported thus far have low density resulting in the undeveloped 2D structures.…”

mentioning

confidence: 99%

“…These results are in good agreement with previously reported chiral GNR. 26 In summary, high-density interchain-linked GNRs from precursor 1,9-dibromodibenzo[g,p]chrysene were fabricated via 2Z-CVD. The fabrication process consists of polymerization, intramolecular-and intermolecular dehydrogenation.…”

mentioning

confidence: 99%

Interchain-linked Graphene Nanoribbons from Dibenzo[g,p]chrysene via Two-zone Chemical Vapor Deposition

Song¹,

Huang²,

Kojima³

et al. 2017

Chem. Lett.

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We report covalently interchain-linked graphene nanoribbons fabricated on Au(111) by a stepwise growth process via two-zone chemical vapor deposition. Prepolymer arrays were grown by surface-assisted polymerization of a precursor, 1,9-dibromodibenzo [g,p]chrysene at 250°C. Further annealing at 450°C converted the prepolymers into interchain-linked graphene nanoribbons via intramolecular and intermolecular dehydrogenation reactions.

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Self-Assembly Strategy for Fabricating Connected Graphene Nanoribbons

Cited by 84 publications

References 50 publications

Substrate-molecule decoupling induced by self-assembly—Implications for graphene nanoribbon fabrication

Substrate-molecule decoupling induced by self-assembly—Implications for graphene nanoribbon fabrication

Nanoribbons: From fundamentals to state-of-the-art applications

Interchain-linked Graphene Nanoribbons from Dibenzo[g,p]chrysene via Two-zone Chemical Vapor Deposition

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