Título:	Elastocaloric effect in graphene kirigami
Autor(es):	Ribeiro Júnior, Luiz Antônio Pereira Júnior, Marcelo Lopes Fonseca, Alexandre F.
ORCID:	https://orcid.org/0000-0001-8413-9744
Afiliação do autor:	University of Brasília, Institute of Physic University of Brasília, Institute of Physics, Computational Materials Laboratory, LCCMat University of Brasília, Faculty of Technology, Department of Electrical Engineering University of Campinas, Gleb Wataghin Institute of Physics, Applied Physics Department
Assunto:	Grafeno Kirigami Coeficiente de desempenho Dinâmica molecular
Data de publicação:	21-Jul-2023
Editora:	American Chemical Society
Referência:	RIBEIRO JUNIOR, Luiz A.; PEREIRA JUNIOR, Marcelo L.; FONSECA, Alexandre F. Elastocaloric effect in graphene kirigami. Nano Letters, [S. l.], v. 23, n. 18, 8801-8807, 2023. DOI: https://doi.org/10.1021/acs.nanolett.3c02260.
Abstract:	Kirigami, a traditional Japanese art of paper cutting, has recently been explored for its elastocaloric effect (ECE) in kirigami-based materials (KMs), where an applied strain induces temperature changes. Importantly, the feasibility of a nanoscale graphene kirigami monolayer was experimentally demonstrated. Here, we investigate the ECE in GK representing the thinnest possible KM to better understand this phenomenon. Through molecular dynamics simulations, we analyze the temperature change and coefficient of performance (COP) of GK. Our findings reveal that while GKs lack the intricate temperature changes observed in macroscopic KMs, they exhibit a substantial temperature change of approximately 9.32 K (23 times higher than that of macroscopic KMs, which is about 0.4 K) for heating and −3.50 K for cooling. Furthermore, they demonstrate reasonable COP values of approximately 1.57 and 0.62, respectively. It is noteworthy that the one-atom-thick graphene configuration prevents the occurrence of the complex temperature distribution observed in macroscopic KMs.
Unidade Acadêmica:	Faculdade de Tecnologia (FT) Departamento de Engenharia Elétrica (FT ENE) Instituto de Física (IF)
DOI:	https://doi.org/10.1021/acs.nanolett.3c02260
Versão da editora:	https://pubs.acs.org/doi/10.1021/acs.nanolett.3c02260?ref=PDF
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