TY - JOUR
T1 - Bottom-Up On-Surface Synthesis of Two-Dimensional Graphene Nanoribbon Networks and Their Thermoelectric Properties
AU - Kojima, Takahiro
AU - Nakae, Takahiro
AU - Xu, Zhen
AU - Saravanan, Chinnusamy
AU - Watanabe, Kentaro
AU - Nakamura, Yoshiaki
AU - Sakaguchi, Hiroshi
N1 - Funding Information:
This study was supported by JSPS KAKENHI Grant Numbers JP17H05154, JP17H02724, JP16H00967, JP16K13608, JP16K17893, JP17K14471; ?Zero-Emission Energy Research? of IAE, Kyoto University.
Publisher Copyright:
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/12/2
Y1 - 2019/12/2
N2 - Graphene, the one-atom-thick two-dimensional (2D) carbon material, has attracted tremendous interest in both academia and industry due to its outstanding electrical, mechanical, and thermal properties. For electronic applications, the challenging task is to make it as a semiconductor. The bottom-up synthesis of semiconducting one-dimensional (1D) nanometer-wide graphene strips, namely, graphene nanoribbons (GNRs), has attracted much attention owing to its promising electronic, optical, and magnetic properties. In this regard, we report the fabrication of cove-type 2D GNR networks (GNNs) via the interconnection of 1D self-assembled GNRs on the surface of Au(111). The cove-type 2D GNRs networks (GNNs) were fabricated from the GNR, 5-CGNR-1-1, synthesized using the precursor of DBSP. Annealing of high-density self-assembled GNRs on the surface of Au(111) through two-zone chemical vapour deposition (2Z CVD) successfully generated a 2D interconnected structure with high yield via the fusion and ladder coupling reactions of GNR chains. In order to validate the later fusion reaction, we have also synthesized the GNR, 7-AGNR-1-1, using the precursor of DBBA. The GNNs, which consist of hybridized metallic-like and semiconducting GNRs, are a new class of carbon-based materials. Further, we applied this material for thermoelectric (TE) applications and found a very low cross-plane thermal conductivity of 0.11 Wm−1 K−1, which is one of the lowest value among the carbon-based materials as well as inorganic semiconductors, while maintaining the cross-plane electrical conductivity of 188 S m−1.
AB - Graphene, the one-atom-thick two-dimensional (2D) carbon material, has attracted tremendous interest in both academia and industry due to its outstanding electrical, mechanical, and thermal properties. For electronic applications, the challenging task is to make it as a semiconductor. The bottom-up synthesis of semiconducting one-dimensional (1D) nanometer-wide graphene strips, namely, graphene nanoribbons (GNRs), has attracted much attention owing to its promising electronic, optical, and magnetic properties. In this regard, we report the fabrication of cove-type 2D GNR networks (GNNs) via the interconnection of 1D self-assembled GNRs on the surface of Au(111). The cove-type 2D GNRs networks (GNNs) were fabricated from the GNR, 5-CGNR-1-1, synthesized using the precursor of DBSP. Annealing of high-density self-assembled GNRs on the surface of Au(111) through two-zone chemical vapour deposition (2Z CVD) successfully generated a 2D interconnected structure with high yield via the fusion and ladder coupling reactions of GNR chains. In order to validate the later fusion reaction, we have also synthesized the GNR, 7-AGNR-1-1, using the precursor of DBBA. The GNNs, which consist of hybridized metallic-like and semiconducting GNRs, are a new class of carbon-based materials. Further, we applied this material for thermoelectric (TE) applications and found a very low cross-plane thermal conductivity of 0.11 Wm−1 K−1, which is one of the lowest value among the carbon-based materials as well as inorganic semiconductors, while maintaining the cross-plane electrical conductivity of 188 S m−1.
KW - 2D graphene nanoribbon networks
KW - 2D materials
KW - chemical vapour deposition
KW - graphene nanoribbons
KW - thermoelectric
UR - http://www.scopus.com/inward/record.url?scp=85075211259&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85075211259&partnerID=8YFLogxK
U2 - 10.1002/asia.201901328
DO - 10.1002/asia.201901328
M3 - Article
C2 - 31724299
AN - SCOPUS:85075211259
VL - 14
SP - 4400
EP - 4407
JO - Chemistry - An Asian Journal
JF - Chemistry - An Asian Journal
SN - 1861-4728
IS - 23
ER -