Bottom-Up Growth of Graphene Nanospears and Nanoribbons

Haibin Sun; Fengning Liu; Leining ZhangKyungmin KoBen McLeanHao AnSungkyun KimMing HuangMarc-Georg WillingerRodney S. RuoffJoonki SuhZhu-Jun WangFeng Ding

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Bottom-Up Growth of Graphene Nanospears and Nanoribbons

机译：Bottom-Up Growth of Graphene Nanospears and Nanoribbons

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One dimensional graphene nanostructures are one of the most promisingmaterials for next generation electronics. Here, the chemical vapor depostiongrowth of graphene nanoribbons (GNRs) and graphene nanospears(GNSs) on a copper surface is reported. The growth of GNRs and GNSsis enabled by a vapor–liquid–solid (VLS) mechanism guided by on-surfacepropagation of a liquid Cu-Si catalyst particle. The slow lateral growth andthe fast VLS vertical growth give rise to spear head-shaped GNSs. In situobservations further confirm that the lateral graphene growth can be completelysuppressed and thus GNRs are grown. The synthesized field effecttransistor (FET) devices show that the GNRs and GNSs have high carriermobilities of ≈2000 cm~2 V~(?1) s~(?1). Both FET and Kelvin probe force microscopymeasurements confirm that the Fermi levels of the synthesize GNSs shiftdownward from the wide part to the tip is strongly p-doped. These findingsyield key insights into the growth mechanism of graphene and open a doorfor achieving a facile and scalable method of synthesizing free standing GNRsand GNSs and their applications, such as the Fermi-level tunable devices.

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来源
《Advanced functional materials》 |2022年第40期|2206961.1-2206961.8|共8页
作者
Haibin Sun; Fengning Liu; Leining ZhangKyungmin KoBen McLeanHao AnSungkyun KimMing HuangMarc-Georg WillingerRodney S. RuoffJoonki SuhZhu-Jun WangFeng Ding;
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Center for Multidimensional Carbon MaterialsInstitute for Basic Science (IBS)Ulsan 44919, Republic of Korea Key Laboratory of Microelectronics and Energy of Henan ProvinceCollege of Physics and Electronic EngineeringXinyang Normal UniversityXinyang 464000;

Center for Multidimensional Carbon MaterialsInstitute for Basic Science (IBS)Ulsan 44919, Republic of Korea;

Department of Materials Science and EngineeringUlsan National Institute of Science and TechnologyUlsan 44919, Republic of KoreaCenter for Multidimensional Carbon MaterialsInstitute for Basic Science (IBS)Ulsan 44919, Republic of Korea Department of Materials Science and EngineeringUlsan National Institute of Science and TechnologyUlsan 44919, Republic of KoreaScientific Center for Optical and Electron MicroscopyETH ZurichOtto-Stern-Weg 3, Zurich 8093, SwitzerlandCenter for Multidimensional Carbon MaterialsInstitute for Basic Science (IBS)Ulsan 44919, Republic of Korea Department of Materials Science and EngineeringUlsan National Institute of Science and TechnologyUlsan 44919, Republic of Korea Department of ChemiScientific Center for Optical and Electron MicroscopyETH ZurichOtto-Stern-Weg 3, Zurich 8093, Switzerland School of Physical Science and TechnologyShanghai Tech UniversityShanghai 200031, China;

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chemical vapor deposition; graphene nanoribbons; graphene nanospears; growth mechanism;

Bottom-Up Growth of Graphene Nanospears and Nanoribbons

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