2D self-assembly and electronic characterization of oxygen–boron–oxygen-doped chiral graphene nanoribbons

Jin, Lei; Bilbao, Nerea; Lv, Yang; Soltani, Paniz; Mali, Kunal S.; Narita, Akimitsu; Feyter, Steven De; Müllen, Kläus; Chen, Zongping

doi:10.1039/d1cc01901e

Cited by 6 publications

(8 citation statements)

References 28 publications

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“…It lowered the bandgap by 0.40 eV compared to pristine GNR without OBO parts. The optical bandgap of such OBO-edged (4,1)-chGNR was further investigated by Jin et al An approximately 1.9 eV optical bandgap was unveiled, rendering a promising prospect in optoelectronics and other nanoelectronics …”

Section: Bandgap Engineering Of Gnrsmentioning

confidence: 99%

“…The optical bandgap of such OBO-edged (4,1)-chGNR was further investigated by Jin et al An approximately 1.9 eV optical bandgap was unveiled, rendering a promising prospect in optoelectronics and other nanoelectronics. 146 At the end of this section, we summarize past successful practices of bandgap engineering through altering widths, backbone/edge structures, and introducing heteroatoms at various sites in Table 1. For altering the widths of AGNRs, it provides a straightforward and effective pathway to tune the bandgap size, since shifting different numbers of lateral atoms is no longer a hindrance.…”

Section: ■ Bandgap Engineering Of Gnrsmentioning

confidence: 99%

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Preparation, Bandgap Engineering, and Performance Control of Graphene Nanoribbons

Luo

2022

Chem. Mater.

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Graphene nanoribbons (GNRs) exhibit a series of essential electronic properties, especially in establishing tunable bandgaps. The bandgaps are determined by structural features of GNRs, including orientation, width, backbone/edge structure, heteroatom doping, and overall quality. These parameters affect the electronic properties of the GNRs to a large extent. To better incorporate GNRs into nanoscale electronic devices, obtaining high-quality GNRs with precisely defined bandgaps is a significant necessity. To date, different preparation techniques have offered a vast range of available materials for fabricating GNRs, where hydrocarbon gases and halogen-containing aromatic molecular precursors are the most important candidates. Therefore, it is fundamental to categorize the existing techniques in preparation, bandgap modulation, application of GNRs, and obtaining systematic knowledge on how to take advantage of this frontier material. Herein, overall understandings on the synthesis strategies and bandgap engineering tactics related to GNRs are presented in detail. Various techniques of top-down approaches and bottom-up syntheses, the origin of GNRs’ bandgap from quantum confinement effect, a diversity of bandgap engineering tools, and the applications of GNR-based devices are comprehensively reviewed with critical comparisons. In addition, the remaining challenges and promising opportunities are listed to catalyze upcoming findings pushing forward the ultimate applications of GNRs.

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Section: Bandgap Engineering Of Gnrsmentioning

confidence: 99%

Section: ■ Bandgap Engineering Of Gnrsmentioning

confidence: 99%

Preparation, Bandgap Engineering, and Performance Control of Graphene Nanoribbons

Luo

2022

Chem. Mater.

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“…Therefore, the large‐scale synthesis and length control of GNRs by on‐surface synthesis approach will be anticipated. [ 48 ] Although the surface‐assisted synthesis of several types of B‐GNRs has been demonstrated, in‐solution synthesis of B‐GNRs still lags behind. There is still no report on the in‐solution synthesis of B‐GNRs from the corresponding precursor with boron atoms, possibly due to the difficulty of the cyclodehydrogenation reaction where an electron‐deficient boron‐containing precursor is concerned.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, the large‐scale synthesis of OBO‐doped (4,1)‐GNR from precursor 19 was demonstrated by the chemical vapor deposition (CVD) method. [ 48 ] Noteworthily, stable and large‐area OBO‐doped (4,1)‐GNR films could be obtained by a wet chemistry transfer process and the optical bandgap of the obtained GNR film is ≈1.9 eV.…”

Section: On‐surface Synthesis Of B‐gnrsmentioning

confidence: 99%

Precision Synthesis of Boron‐Doped Graphene Nanoribbons: Recent Progress and Perspectives

Zhang

Feng

2022

Macro Chemistry & Physics

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Special issue dedicated to Brigitte Voit on the occasion of her 60th birthdayStructurally precision graphene nanoribbons (GNRs) have attracted great interest considering their prospective applications as organic carbon materials for nanoelectronics. The electronic properties of GNRs not only critically depend on the edge structure and width but also on the heteroatom type, doping position, and concentration. Motivated by the recent undisputable progress in the synthesis of stable boron-doped polycyclic aromatic hydrocarbons (B-PAHs), considerable efforts have been devoted to the precision synthesis of the corresponding boron-doped GNRs (B-GNRs) via bottom-up synthesis approach in recent years in view of the extraordinary ability of boron doping on modulating their physiochemical properties. In this review, an overview of the bottom-up organic synthesis of B-GNRs, including the precursor design and synthesis, structure characterization of the resulting B-GNRs, and investigation of their electronic properties is provided. Moreover, the future challenges and perspectives regarding the bottom-up synthesis of B-GNRs are also discussed. The authors hope that this review will further stimulate the synthesis and device integrations of B-GNRs with a combined effort from different disciplines.

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“…The B , O doped PAH 161 was used for an atomically precise bottom-up synthesis of graphene nanoribbons 163 on Au (111) ( Scheme 38 ). The final structure of the GNR was determined by STM and AFM analyses together with Raman spectroscopy [ 105 ].…”

Section: B-doped Polycyclic Aromatic Hydrocarbonsmentioning

confidence: 99%

Novel Synthetic Approach to Heteroatom Doped Polycyclic Aromatic Hydrocarbons: Optimizing the Bottom-Up Approach to Atomically Precise Doped Nanographenes

et al. 2021

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The success of the rational bottom-up approach to nanostructured carbon materials and the discovery of the importance of their doping with heteroatoms puts under the spotlight all synthetic organic approaches to polycyclic aromatic hydrocarbons. The construction of atomically precise heteroatom doped nanographenes has evidenced the importance of controlling its geometry and the position of the doping heteroatoms, since these parameters influence their chemical–physical properties and their applications. The growing interest towards this research topic is testified by the large number of works published in this area, which have transformed a once “fundamental research” into applied research at the cutting edge of technology. This review analyzes the most recent synthetic approaches to this class of compounds.

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2D self-assembly and electronic characterization of oxygen–boron–oxygen-doped chiral graphene nanoribbons

Abstract: Graphene nanoribbons (GNRs), quasi-one-dimensional strips of graphene, exhibit a nonzero bandgap due to quantum confinement and edge effects. In the past decade, different types of GNRs with atomically precise structures...

Cited by 6 publications

References 28 publications

Preparation, Bandgap Engineering, and Performance Control of Graphene Nanoribbons

Preparation, Bandgap Engineering, and Performance Control of Graphene Nanoribbons

Precision Synthesis of Boron‐Doped Graphene Nanoribbons: Recent Progress and Perspectives

Novel Synthetic Approach to Heteroatom Doped Polycyclic Aromatic Hydrocarbons: Optimizing the Bottom-Up Approach to Atomically Precise Doped Nanographenes

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