Nanomechanical behavior and interfacial deformation beyond the elastic limit in 2D metal–organic framework nanosheets

Zeng, Z.; Flyagina, I.S.; Tan, J.

Авторы: Zeng Zhixin, Flyagina Irina S., Tan Jin-Chong
Журнал: Nanoscale Advances
Том: 2
Номер: 11
Год издания: 2020
Издательство: Royal Society of Chemistry
Местоположение издательства: United Kingdom
Первая страница: 5181
Последняя страница: 5191
DOI: 10.1039/d0na00475h
Аннотация: Nanoscale mechanical property measurements of nanoporous nanosheets face many challenges. Hereinwe show atomic force microscope (AFM)-based nanoindentation to probe the nanoscale mechanicalproperties of a 2-D metal–organic framework (MOF) nanosheet material containing atomic-sized pores,termed CuBDC [copper 1,4-benzenedicarboxylate]. The sample thickness ranged from10 nm (tens ofmonolayers) up to400 nm (a stack of multilayers). In terms of its elastic–plastic properties, the Young'smodulus (E23 GPa) and yield strength (sy450 MPa) were determined in the through-thicknessdirection. Moreover, we characterized the failure mechanisms of the CuBDC nanosheets, where threefailure mechanisms were identified: interfacial slippage, fracture of the framework, and delamination ofmultilayered nanosheets. Threshold forces and indentation depths corresponding to these failure modeswere determined. To gain insights into the failure mechanisms, we employfinite-element models withcohesive elements to simulate the interfacial debonding of a stack of 2-D nanosheets during theindentation process. The nanomechanical AFM methodology elucidated here will pave the way for thestudy of other 2-D hybrid nanosheets and layeredvan der Waalssolids.
Добавил в систему: Флягина Ирина Сергеевна

	ИСТИНА	Войти в систему Регистрация
	ИПМех РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИПМех РАН

Nanomechanical behavior and interfacial deformation beyond the elastic limit in 2D metal–organic framework nanosheetsстатья Исследовательская статья Электронная публикация

Прикрепленные файлы