Synthesis of Regioisomeric Graphene Nanoribbon Junctions via Heteroprecursors

Kewei Sun; Ondrej Krejci; Adam S. Foster; Yasuhiro Okuda; Akihiro Orita; Shigeki Kawai

doi:10.1021/acs.jpcc.9b05881

Synthesis of Regioisomeric Graphene Nanoribbon Junctions via Heteroprecursors

Kewei Sun, Ondrej Krejci, Adam S. Foster, Yasuhiro Okuda, Akihiro Orita, Shigeki Kawai^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

Graphene nanoribbons are one of the most promising materials for nanoscale electronics. While various structures have successfully been synthesized by on-surface reactions, curved connections remain less investigated, yet they could prove highly useful in the development of copolymerization technology. Here, we present the synthesis of three different regioisomeric junctions on Au (111) by using 10,10'-dibromo-9,9'-bianthryl and 1,3,6,8-tetrabromopyrene. The chemical structures and the electronic properties of junctions were studied with a combination of scanning tunneling microscopy with a CO terminated tip, scanning tunneling spectroscopy, and density functional theory calculations. We found that two identical nanoribbon-junction interface electronic states appear within the band gaps of connected graphene nanoribbons.

Original language	English
Pages (from-to)	17632-17638
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	123
Issue number	28
DOIs	https://doi.org/10.1021/acs.jpcc.9b05881
Publication status	Published - 18 Jul 2019
MoE publication type	A1 Journal article-refereed

Keywords

ON-SURFACE SYNTHESIS
TOTAL-ENERGY CALCULATIONS
BOTTOM-UP SYNTHESIS
BAND-GAP
ARMCHAIR
FABRICATION
MOLECULES

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SCI_Sun_Krejci_Synthesis_of_Regioisomeric_MainAccepted author manuscript, 1.49 MB
SCI_Sun_Krejci_Synthesis_of_Regioisomeric_Supporting_InformationAccepted author manuscript, 1.41 MB

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title = "Synthesis of Regioisomeric Graphene Nanoribbon Junctions via Heteroprecursors",

abstract = "Graphene nanoribbons are one of the most promising materials for nanoscale electronics. While various structures have successfully been synthesized by on-surface reactions, curved connections remain less investigated, yet they could prove highly useful in the development of copolymerization technology. Here, we present the synthesis of three different regioisomeric junctions on Au (111) by using 10,10'-dibromo-9,9'-bianthryl and 1,3,6,8-tetrabromopyrene. The chemical structures and the electronic properties of junctions were studied with a combination of scanning tunneling microscopy with a CO terminated tip, scanning tunneling spectroscopy, and density functional theory calculations. We found that two identical nanoribbon-junction interface electronic states appear within the band gaps of connected graphene nanoribbons.",

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author = "Kewei Sun and Ondrej Krejci and Foster, {Adam S.} and Yasuhiro Okuda and Akihiro Orita and Shigeki Kawai",

year = "2019",

month = jul,

day = "18",

doi = "10.1021/acs.jpcc.9b05881",

language = "English",

volume = "123",

pages = "17632--17638",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "28",

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TY - JOUR

T1 - Synthesis of Regioisomeric Graphene Nanoribbon Junctions via Heteroprecursors

AU - Sun, Kewei

AU - Krejci, Ondrej

AU - Foster, Adam S.

AU - Okuda, Yasuhiro

AU - Orita, Akihiro

AU - Kawai, Shigeki

PY - 2019/7/18

Y1 - 2019/7/18

N2 - Graphene nanoribbons are one of the most promising materials for nanoscale electronics. While various structures have successfully been synthesized by on-surface reactions, curved connections remain less investigated, yet they could prove highly useful in the development of copolymerization technology. Here, we present the synthesis of three different regioisomeric junctions on Au (111) by using 10,10'-dibromo-9,9'-bianthryl and 1,3,6,8-tetrabromopyrene. The chemical structures and the electronic properties of junctions were studied with a combination of scanning tunneling microscopy with a CO terminated tip, scanning tunneling spectroscopy, and density functional theory calculations. We found that two identical nanoribbon-junction interface electronic states appear within the band gaps of connected graphene nanoribbons.

AB - Graphene nanoribbons are one of the most promising materials for nanoscale electronics. While various structures have successfully been synthesized by on-surface reactions, curved connections remain less investigated, yet they could prove highly useful in the development of copolymerization technology. Here, we present the synthesis of three different regioisomeric junctions on Au (111) by using 10,10'-dibromo-9,9'-bianthryl and 1,3,6,8-tetrabromopyrene. The chemical structures and the electronic properties of junctions were studied with a combination of scanning tunneling microscopy with a CO terminated tip, scanning tunneling spectroscopy, and density functional theory calculations. We found that two identical nanoribbon-junction interface electronic states appear within the band gaps of connected graphene nanoribbons.

KW - ON-SURFACE SYNTHESIS

KW - TOTAL-ENERGY CALCULATIONS

KW - BOTTOM-UP SYNTHESIS

KW - BAND-GAP

KW - ARMCHAIR

KW - FABRICATION

KW - MOLECULES

U2 - 10.1021/acs.jpcc.9b05881

DO - 10.1021/acs.jpcc.9b05881

M3 - Article

SN - 1932-7447

VL - 123

SP - 17632

EP - 17638

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 28

ER -

Synthesis of Regioisomeric Graphene Nanoribbon Junctions via Heteroprecursors

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