Modified Engineering of Graphene Nanoribbons Prepared via On‐Surface Synthesis

Abstract

1D graphene nanoribbons (GNRs) have a bright future in the fabrication of next‐generation nanodevices because of their nontrivial electronic properties and tunable bandgaps. To promote the application of GNRs, preparation strategies of miscellaneous GNRs have to be developed. The GNRs prepared by top‐down approaches are accompanied by uncontrolled edges and structures. In order to overcome the difficulties, bottom‐up methods are widely used in the growth of various GNRs due to controllability of GNRs' features. Among those bottom‐up methods, the on‐surface synthesis is a promising approach to prepare GNRs with distinct widths, edge/backbone structures, and so forth. Therefore, modified engineering of the GNRs prepared via on‐surface synthesis is of great significance in controllable preparation of GNRs and their potential applications. In the past decade, there have been a lot of reports on controllable preparation of GNRs using on‐surface synthesis approach. Herein, the advances of GNRs grown via on‐surface growth strategy are described. Several growth parameters, the latest advances in the modification of the GNR structure and width, the GNR doping/co‐doping with heteroatoms, a variety of GNR heterojunctions, and the device application of GNRs are reviewed. Finally, the opportunities and challenges are discussed.

Graphene Nanoribbons: On‐Surface Synthesis and Integration into Electronic Devices

“…In this article, we summarize the latest developments and updates, mainly focusing on the field of on‐surface synthesis of GNRs. In view of the dynamics of the field, readers are referred to previous review articles published by us [ 11,12,25,26,49–51 ] and others [ 10,52–56 ] for a detailed description of the preceding works. Here, we start with the recent progress in the surface‐assisted synthesis of GNRs under UHV and CVD conditions.…”

Controllable synthesis of graphene by CVD method

“…然而, 当氧含量超过一定限度时, [88] 辅助气相沉积, 通过激光、微波、等离子体 等引入CVD体系, 可以促进碳源分子的分解, 使反应温 度降低, 促进生长过程, 实现低温生长 [108] , 或者超快 生长 [109] . [110] .…”

“…最近, 通过结合 [56] . 对铜晶面而言, 与Cu (110) 和Cu ( [59,60] 以及Ga蒸汽辅助绝缘基底上石墨烯的制 备 [61] , 并且利用气态铜比表面积大、催化均匀的特点 . 最初在介电基底上制备石墨烯是通过介电层上覆 盖固态碳源再覆盖薄金属层的方法来实现的, 如自组 装单分子膜 [65] 、无定形石墨 [66] 、聚合物 [67] 等.…”

Fjord-Edge Graphene Nanoribbons with Site-Specific Nitrogen Substitution

“…Graphene nanoribbons (GNRs) are expected to usher in the ultimate nanosizing of electronics 1,2,3,4 and sensors 5,6 for next generation devices. The electronic properties of GNRs can be exquisitely tuned by modification of their width, backbone, and edge structure.…”

“…The electronic properties of GNRs can be exquisitely tuned by modification of their width, backbone, and edge structure. 1,7,8,9,10 In the last decade, both on-surface and in-solution bottom-up syntheses have achieved precise structural control over these benchmarks. 11,12,13,14,15 Early bottom-up syntheses have focused on GNRs with armchair 16,17,18,19 or zigzag 20 edges.…”