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arXiv 2202.01101cond-mat.mtrl-sci
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窄带隙石墨烯纳米带的生长优化及器件集成

Growth optimization and device integration of narrow-bandgap graphene nanoribbons

Gabriela Borin Barin, Qiang Sun, Marco Di Giovannantonio, Cheng-Zhuo Du, Xiao-Ye Wang, Juan Pablo Llinas, Zafer Mutlu, Yuxuan Lin, Jan Wilhelm, Jan Overbeck, Co… 展开作者

Gabriela Borin Barin, Qiang Sun, Marco Di Giovannantonio, Cheng-Zhuo Du, Xiao-Ye Wang, Juan Pablo Llinas, Zafer Mutlu, Yuxuan Lin, Jan Wilhelm, Jan Overbeck, Colin Daniels, Michael Lamparski, Hafeesudeen Sahabudeen, Mickael L. Perrin, José I. Urgel, Shantanu Mishra, Amogh Kinikar, Roland Widmer, Samuel Stolz, Max Bommert, Carlo Pignedoli, Xinliang Feng, Michel Calame, Klaus Müllen, Akimitsu Narita, Vincent Meunier, Jeffrey Bokor, Roman Fasel, Pascal Ruffieux

摘要:

石墨烯纳米带(GNR)的电子、光学和磁性可以通过基于分子前体的自下而上的制造以原子精度控制其边缘结构和宽度来工程化。这种方法为全碳电子器件提供了一个独特的平台,但需要仔细优化生长条件,以匹配成功器件集成的结构要求,GNR长度是最关键的参数。在这项工作中,我们研究了5-原子宽扶手椅型GNRs(5-AGNRs)的生长,表征和器件集成,这有望成为开关器件中具有最佳带隙的活性物质。5-AGNR是通过在超高真空条件下从Br-和I-取代的前体通过表面合成获得的。我们发现,使用I-取代的前体和优化的初始前体覆盖五倍的平均5-AGNR长度。这种显著的长度增加使我们能够将5-AGNR集成到器件中,并实现了第一个基于窄带隙AGNR的场效应晶体管,该晶体管在室温下显示出开关行为。我们的研究强调,优化的生长方案可以成功地在亚纳米尺度(需要原子精度来控制电子特性)和与GNR的成功器件集成相关的数十纳米尺度之间架起桥梁。

英文摘要:

The electronic, optical and magnetic properties of graphene nanoribbons (GNRs) can be engineered by controlling their edge structure and width with atomic precision through bottom-up fabrication based on molecular precursors. This approach offers a unique platform for all-carbon electronic devices but requires careful optimization of the growth conditions to match structural requirements for successful device integration, with GNR length being the most critical parameter. In this work, we study the growth, characterization, and device integration of 5-atom wide armchair GNRs (5-AGNRs), which are expected to have an optimal band gap as active material in switching devices. 5-AGNRs are obtained via on-surface synthesis under ultra-high vacuum conditions from Br- and I-substituted precursors. We show that the use of I-substituted precursors and the optimization of the initial precursor coverage quintupled the average 5-AGNR length. This significant length increase allowed us to integrate 5-AGNRs into devices and to realize the first field-effect transistor based on narrow bandgap AGNRs that shows switching behavior at room temperature. Our study highlights that optimized growth protocols can successfully bridge between the sub-nanometer scale, where atomic precision is needed to control the electronic properties, and the scale of tens of nanometers relevant for successful device integration of GNRs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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