可控大电流感应扫描隧道显微镜对C60的改性

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL Carbon Pub Date : 2025-03-20 DOI:10.1016/j.carbon.2025.120251

Ewan S. Scougall , Bastien Anézo , Yuri Tanuma , Henry J. Chandler , Chris Ewels , Renald Schaub , Eleanor E.B. Campbell

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引用次数: 0

摘要

我们证明了可控stm诱导的对Cu（111）表面支撑的Ih-C60的修饰/破坏，表明该分子对大于3.5 V的偏置电压的高电流更具弹性。这是由于通过分子弥漫性SAMO轨道的电荷输运增强，与通过π分子轨道的共振低偏输运相比，电子-振动耦合的概率更低。实验和理论的DFT结果表明，破坏机制来自于C2从富勒烯笼中发射，以及C2的连续发射形成更小的富勒烯。

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Controlled high-current-induced scanning tunnelling microscope modification of C60

We demonstrate controlled STM-induced modification/destruction of I_h-C₆₀ supported on a Cu(111) surface, showing that the molecule is more resilient to high currents for bias voltages greater than ca. 3.5 V. This is due to the enhanced charge transport through the diffuse SAMO orbitals of the molecule with lower probability for electron-vibration coupling than found for resonant low bias transport through π-molecular orbitals. Experimental and theoretical DFT results demonstrate the destruction mechanism comes from C₂ emission from the fullerene cage and the formation of smaller fullerenes via sequential emission of C₂.

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.