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Kanegae GB, Pereira Junior ML, Galvão DS, Ribeiro Junior LA, Fonseca AF. Enhanced Elastocaloric Effects in γ-Graphyne. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38706297 DOI: 10.1021/acsami.4c03302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2024]
Abstract
The global emphasis on sustainable technologies has become a paramount concern for nations worldwide. Specifically, numerous sustainable methods are being explored as promising alternatives to the well-established vapor-compression technologies in cooling and heating devices. One such avenue gaining traction within the scientific community is the elastocaloric (eC) effect. This phenomenon holds promise for efficient cooling and heating processes without causing environmental harm. Studies carried out at the nanoscale have demonstrated the efficiency of the eC effect, proving to be comparable to that of state-of-the-art macroscopic systems. In this study, we used classical molecular dynamics simulations to investigate the elastocaloric effect for the recently synthesized γ-graphyne. Our analysis goes beyond obtaining changes in eC temperature and the coefficient of performance (COP) for two species of γ-graphyne nanoribbons (armchair and zigzag). We also explore their dependence on various conditions, including whether they are deposited on a substrate or prestrained. Our findings reveal a substantial enhancement in the elastocaloric effect for γ-graphyne nanoribbons when subjected to prestrain, amplifying it by at least 1 order of magnitude. Under certain conditions, the changes in the eC temperature and the COP of the structures reach expressive values as high as 224 K and 14, respectively. We discuss the implications of these results by examining the shape and behavior of the carbon-carbon bond lengths within the structures.
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Affiliation(s)
- Guilherme B Kanegae
- Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Departamento de Física Aplicada, Campinas, São Paulo 13083-859, Brazil
| | - Marcelo L Pereira Junior
- University of Brasília, Faculty of Technology, Department of Electrical Engineering, Brasília 70910-900, Brazil
| | - Douglas S Galvão
- Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Departamento de Física Aplicada, Campinas, São Paulo 13083-859, Brazil
| | - Luiz A Ribeiro Junior
- University of Brasília, Institute of Physics, Brasília 70910-900, Brazil
- Computational Materials Laboratory, LCCMat, University of Brasília, Brasília 70910-900, Brazil
| | - Alexandre F Fonseca
- Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Departamento de Física Aplicada, Campinas, São Paulo 13083-859, Brazil
- Department of Mechanical and Civil Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, United States
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Cai J, Yang B, Akbarzadeh A. Origami Metamaterials Enable Low-Stress-Driven Giant Elastocaloric Effect. ACS NANO 2024; 18:894-908. [PMID: 38149799 DOI: 10.1021/acsnano.3c09516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Elastocaloric materials, capable of achieving reversible thermal changes in response to a uniaxial stress, have attracted considerable attention for applications in advanced thermal management technologies, owing to their environmental friendliness and economic benefits. However, most elastocaloric materials operating on the basis of first/second-order phase transition often exhibit a limited caloric response, field hysteresis, and restricted working temperature ranges. This study resorts to origami engineering for realizing multifunctional metamaterials with exceptional elastocaloric effects at both nano (exemplified by computational simulations for graphene) and meso (demonstrated by experimentation on thermoplastic polyurethane elastomers) scales. The findings uncover that the graphene origami exhibits low-stress-driven reversible and giant elastocaloric effects without a hysteresis loss and with a high elastocaloric strength. These effects are achieved across a wide working temperature range (100-600 K) and are tailorable by fine-tuning the topological parameters and configurational status of the origami metamaterials. We demonstrate the scalability of the origami design strategy for magnifying the elastocaloric effect by the 3D printing of a mesoscale origami-inspired thermoplastic polyurethane metastructure that showcases enhanced elastocaloric performance at room temperature. This study presents the potential for the realization of architected elastocaloric materials through surface functionalization and origami engineering. The findings impart exciting prospects of elastocaloric origami metamaterials as the next generation of multiscale and sustainable thermal management technologies.
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Affiliation(s)
- Jun Cai
- Department of Bioresource Engineering, McGill University, Montreal, Québec H9X 3V9, Canada
| | - Bin Yang
- Department of Bioresource Engineering, McGill University, Montreal, Québec H9X 3V9, Canada
| | - Abdolhamid Akbarzadeh
- Department of Bioresource Engineering, McGill University, Montreal, Québec H9X 3V9, Canada
- Department of Mechanical Engineering, McGill University, Montreal, Québec H9A 0C3, Canada
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Ribeiro Junior LA, Pereira Junior ML, Fonseca AF. Elastocaloric Effect in Graphene Kirigami. NANO LETTERS 2023; 23:8801-8807. [PMID: 37477260 DOI: 10.1021/acs.nanolett.3c02260] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
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.
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Affiliation(s)
- Luiz A Ribeiro Junior
- Institute of Physics, University of Brasília, 70910-900 Brasília, Brazil
- Computational Materials Laboratory, LCCMat, Institute of Physics, University of Brasília, 70910-900 Brasília, Brazil
| | - Marcelo L Pereira Junior
- Department of Electrical Engineering, Faculty of Technology, University of Brasília, 70910-900 Brasília, Brazil
| | - Alexandre F Fonseca
- Applied Physics Department, Gleb Wataghin Institute of Physics, University of Campinas, 13083-859 Campinas, São Paulo, Brazil
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Chen C, Wang S, Zhang T, Zhang C, Chi Q, Li W. Designing coexisting multi-phases in PZT multilayer thin films: an effective way to induce large electrocaloric effect. RSC Adv 2020; 10:6603-6608. [PMID: 35496006 PMCID: PMC9049751 DOI: 10.1039/c9ra10896c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Accepted: 01/29/2020] [Indexed: 11/23/2022] Open
Abstract
Coexisting multi-phases in PbZrxTi1−xO3 multilayer thin films were successfully fabricated using the sol–gel method. The microstructure and electrical of the multilayer films with different growth sequences, including the up multilayer films and down multilayer films, have been systematically investigated. The results indicate that a large electrocaloric effect (ECE) is obtained at the temperatures much below the Curie temperature. At room temperature (25 °C), the change in temperature (ΔT) values of the up multilayer and down multilayer thin films are 20.2 K with the applied electric field E = 826 kV cm−1 and 46.3 K with the E = 992 kV cm−1, respectively. In addition, both the films exhibit outstanding ECE of around 145 °C, and ΔT values of 28.9 K and 14.8 K have been obtained for the up multilayer and down multilayer thin films. The results indicate that the antiferroelectric/ferroelectric (AFE/FE), ferroelectric/ferroelectric (FE/FE) phase transition and the synergistic effect of the AFE/FE and FE/FE phase transition are as effective as the FE/PE phase transition. In particular, the multilayer thin films are endowed with refrigeration ability at multi-temperature zones due to the coexistence of multi-phases. Coexisting multi-phases in PbZrxTi1−xO3 multilayer thin films were successfully fabricated using the sol–gel method.![]()
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Affiliation(s)
- Cai Chen
- School of Electrical and Electronic Engineering, Harbin University of Science and Technology Harbin 150080 PR China
| | - Sichun Wang
- School of Electrical and Electronic Engineering, Harbin University of Science and Technology Harbin 150080 PR China .,School of Electrical Engineering and Automation, Harbin Institute of Technology Harbin 150001 PR China
| | - Tiandong Zhang
- School of Electrical and Electronic Engineering, Harbin University of Science and Technology Harbin 150080 PR China .,Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology Harbin 150080 PR China
| | - Changhai Zhang
- School of Electrical and Electronic Engineering, Harbin University of Science and Technology Harbin 150080 PR China .,Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology Harbin 150080 PR China
| | - Qingguo Chi
- School of Electrical and Electronic Engineering, Harbin University of Science and Technology Harbin 150080 PR China .,Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology Harbin 150080 PR China
| | - Weili Li
- School of Materials Science and Engineering, Harbin Institute of Technology Harbin 150001 PR China
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Fernandes J, Vendramini E, Miranda AM, Silva C, Dinis H, Coizet V, David O, Mendes PM. Design and Performance Assessment of a Solid-State Microcooler for Thermal Neuromodulation. MICROMACHINES 2018; 9:mi9020047. [PMID: 30393323 PMCID: PMC6187761 DOI: 10.3390/mi9020047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/25/2018] [Accepted: 01/26/2018] [Indexed: 01/06/2023]
Abstract
It is well known that neural activity can be modulated using a cooling device. The applications of this technique range from the treatment of medication-resistant cerebral diseases to brain functional mapping. Despite the potential benefits of such technique, its use has been limited due to the lack of suitable thermal modulators. This paper presents the design and validation of a solid-state cooler that was able to modulate the neural activity of rodents without the use of large and unpractical water pipes. A miniaturized thermal control solution based exclusively on solid-state devices was designed, occupying only 5 mm × 5 mm × 3 mm, and featuring the potential for wireless power and communications. The cold side of the device was cooled to 26 °C, while the hot side was kept below 43 °C. This range of temperatures is compatible with brain cooling and efficient enough for achieving some control of neural activity.
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Affiliation(s)
- José Fernandes
- CMEMS, University of Minho, 4800-058 Guimarães, Portugal.
| | - Estelle Vendramini
- Grenoble Institut des Neurosciences, U1216 Inserm, Université Grenoble Alpes, 38400 Grenoble, France.
| | - Ana M Miranda
- CMEMS, University of Minho, 4800-058 Guimarães, Portugal.
| | | | - Hugo Dinis
- CMEMS, University of Minho, 4800-058 Guimarães, Portugal.
| | - Veronique Coizet
- Grenoble Institut des Neurosciences, U1216 Inserm, Université Grenoble Alpes, 38400 Grenoble, France.
| | - Olivier David
- Grenoble Institut des Neurosciences, U1216 Inserm, Université Grenoble Alpes, 38400 Grenoble, France.
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