Bonding in 2D Donor–Acceptor Heterostructures

Autor:	Daniel L. Druffel, Scott C. Warren, Jacob T. Pawlik, Jack D. Sundberg, Adam H. Woomer
Rok vydání:	2019
Předmět:	Colloid and Surface Chemistry Chemical physics Chemistry Heterojunction General Chemistry Materials design 010402 general chemistry Donor acceptor 01 natural sciences Biochemistry Catalysis 0104 chemical sciences
Zdroj:	Journal of the American Chemical Society. 141:10300-10308
ISSN:	1520-5126 0002-7863
DOI:	10.1021/jacs.9b03155
Popis:	The ability to alter distances between atoms is among the most important tools in materials design. Despite this importance, controlling the interlayer distance in stacks of 2D materials remains a challenge. Here we show from first-principles that stacking electrenes-a new class of electron-donating 2D materials-with other 2D materials provides this control. The resulting donor-acceptor heterostructures have interlayer distances 1 Å less than van der Waals layered materials but 1 Å more than covalent or ionic bonds. This yields a class of quasi-bonds that exhibit characteristics of both ordinary chemical bonds and van der Waals interactions. We show how quasi-bonds have tunable polarities and strengths and that these bonds can be understood by drawing on familiar concepts from molecular orbital theory. We also demonstrate several useful properties of 2D donor-acceptor heterostructures, including superlubricity, ultralow work functions, and greatly improved voltages for lithium-ion batteries.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bed8de2440e59cbba404f823f2d03d5 https://doi.org/10.1021/jacs.9b03155 Zobrazit plný text záznamu