| AVS 66th International Symposium & Exhibition | |
| 2D Materials | Thursday Sessions |
| Session 2D+EM+MI+NS+QS+SS-ThM |
| Session: | Dopants, Defects, and Interfaces in 2D Materials |
| Presenter: | Mark Hersam, Northwestern University |
| Correspondent: | Click to Email |
Following the success of ambient-stable two-dimensional (2D) materials such as graphene and hexagonal boron nitride, new classes of chemically reactive layered solids are being explored since their unique properties hold promise for improved device performance [1]. For example, chemically reactive 2D semiconductors (e.g., black phosphorus (BP) and indium selenide (InSe)) have shown enhanced field-effect mobilities under controlled conditions that minimize ambient degradation [2]. In addition, 2D boron (i.e., borophene) is an anisotropic metal with a diverse range of theoretically predicted phenomena including confined plasmons, charge density waves, and superconductivity [3], although its high chemical reactivity has limited experimental studies to inert ultrahigh vacuum conditions [4-7]. Therefore, to fully study and exploit the vast majority of 2D materials, methods for mitigating or exploiting their relatively high chemical reactivity are required [8]. In particular, covalent organic functionalization of BP minimizes ambient degradation, provides charge transfer doping, and enhances field-effect mobility [9]. In contrast, noncovalent organic functionalization of borophene leads to the spontaneous formation of electronically abrupt lateral organic-borophene heterostructures [10]. By combining organic and inorganic encapsulation strategies, even highly chemically reactive 2D materials (e.g., InSe) can be studied and utilized in ambient conditions [11].
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[3] A. J. Mannix, et al., Nature Nanotechnology, 13, 444 (2018).
[4] A. J. Mannix, et al., Science, 350, 1513 (2015).
[5] G. P. Campbell, et al., Nano Letters, 18, 2816 (2018).
[6] X. Liu, et al., Nature Materials, 17, 783 (2018).
[7] X. Liu, et al., Nature Communications, 10, 1642 (2019).
[8] C. R. Ryder, et al., ACS Nano, 10, 3900 (2016).
[9] C. R. Ryder, et al., Nature Chemistry, 8, 597 (2016).
[10] X. Liu, et al., Science Advances, 3, e1602356 (2017).
[11] S. A. Wells, et al., Nano Letters, 18, 7876 (2018).