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Xing Z, Liu Y, Wu N, Wang S, Zhang X. Prediction of high thermal rectification behavior in carbon/C 3N heteronanotubes based on nonequilibrium molecular dynamics simulations. Phys Chem Chem Phys 2024. [PMID: 39099465 DOI: 10.1039/d4cp01890g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/06/2024]
Abstract
Carbon/C3N heteronanotubes (CC3NNTs) have garnered significant interest for their distinctive performance and versatility across various applications. However, the understanding of interfacial heat transport within these heterostructures remains limited. This study aims to enrich the field by constructing models of CC3NNTs through the bonding of CNTs and C3NNTs, and employs nonequilibrium molecular dynamics (NEMD) simulations to predict their heat flux and thermal rectification (TR) effects. Placing the heat source in the CNT region induces a stronger heat flux compared to the C3NNT region, thus demonstrating a pronounced TR effect. This effect can be attributed to the mismatch in phonon spectra, as evidenced by the cumulative correlation factor derived from the phonon density of states (phonon DOS). Using this approach, we predict that the TR ratio for zigzag CC3NNTs (ZCC3NNT) significantly exceeds that of armchair CC3NNTs (ACC3NNT). Notably, in contrast to ACC3NNT, ZCC3NNT exhibits the phenomenon of negative differential thermal resistance in the backward heat flux with a temperature difference of Δ = 120 K. This phenomenon can be attributed to a lower phonon participation ratio at Δ = 120 K compared to other values of Δ. Subsequently, given that ZCC3NNT demonstrates the most pronounced TR ratio at room temperature, we explored how stress-strain, system size, defect density, and interface position impact the TR ratio. These insights are invaluable for guiding the design of thermal rectifiers, smart thermal management systems, and microelectronic processor coolers.
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Affiliation(s)
- Zhibo Xing
- Department of Power Engineering, School of Energy and Power Engineering, North China Electric Power University, Baoding 071003, China.
| | - Yingguang Liu
- Department of Power Engineering, School of Energy and Power Engineering, North China Electric Power University, Baoding 071003, China.
- Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, North China Electric Power University, Baoding 071003, Hebei, China
| | - Ning Wu
- Department of Power Engineering, School of Energy and Power Engineering, North China Electric Power University, Baoding 071003, China.
| | - Shuo Wang
- Department of Power Engineering, School of Energy and Power Engineering, North China Electric Power University, Baoding 071003, China.
| | - Xutao Zhang
- Department of Power Engineering, School of Energy and Power Engineering, North China Electric Power University, Baoding 071003, China.
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Tan V, Berg F, Maleki H. Diatom-inspired silicification process for development of green flexible silica composite aerogels. Sci Rep 2024; 14:6973. [PMID: 38521812 PMCID: PMC10960801 DOI: 10.1038/s41598-024-57257-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 03/15/2024] [Indexed: 03/25/2024] Open
Abstract
In this study, we have developed novel biomimetic silica composite aerogels and cryogels for the first time, drawing inspiration from the natural diatom's silicification process. Our biomimetic approach involved the modification of tyrosinase-mediated oxidized silk fibroin (SFO) surfaces with polyethyleneimine (PEI). This modification introduced ample amine groups onto the SF polymer, which catalyzed the silicification of the SFO-PEI gel surface with silicic acid. This process emulates the catalytic function of long-chain polyamines and silaffin proteins found in diatoms, resulting in a silica network structure on the primary SFO-PEI network gel's surface. The SFO-PEI gel matrix played a dual role in this process: (1) It provided numerous amine functional groups that directly catalyzed the silicification of silicic acid on the porous structure's exterior surface, without encapsulating the created silica network in the gel. (2) It served as a flexible mechanical support facilitating the creation of the silica network. As a result, the final ceramic composite exhibits a mechanically flexible nature (e.g., cyclic compressibility up to 80% strain), distinguishing it from conventional composite aerogels. By mimicking the diatom's silicification process, we were able to simplify the development of silica-polymer composite aerogels. It eliminates the need for surfactants, multi-step procedures involving solvent exchange, and gel washing. Instead, the reaction occurs under mild conditions, streamlining the composite aerogels fabrication process.
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Affiliation(s)
- Valerie Tan
- Department of Chemistry, Institute of Inorganic Chemistry, University of Cologne, Greinstresse 6, 50939, Cologne, Germany
| | - Florian Berg
- Department of Chemistry, Institute of Inorganic Chemistry, University of Cologne, Greinstresse 6, 50939, Cologne, Germany
| | - Hajar Maleki
- Department of Chemistry, Institute of Inorganic Chemistry, University of Cologne, Greinstresse 6, 50939, Cologne, Germany.
- Center for Molecular Medicine Cologne, CMMC Research Center, Robert-Koch-Str. 21, 50931, Cologne, Germany.
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Jung Y, Lee W, Han S, Kim BS, Yoo SJ, Jang H. Thermal Transport Properties of Phonons in Halide Perovskites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2204872. [PMID: 36036368 DOI: 10.1002/adma.202204872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 08/21/2022] [Indexed: 06/15/2023]
Abstract
Halide perovskites have emerged as promising candidates for various applications, such as photovoltaic, optoelectronic and thermoelectric applications. The knowledge of the thermal transport of halide perovskites is essential for enhancing the device performance for these applications and improving the understanding of heat transport in complicated material systems with atomic disorders. In this work, the current understanding of the experimentally and theoretically obtained thermal transport properties of halide perovskites is reviewed. This study comprehensively examines the reported thermal conductivity of methylammonium lead iodide, which is a prototype material, and provides theoretical frameworks for its lattice vibrational properties. The frameworks and discussions are extended to other halide perovskites and derivative structures. The implications for device applications, such as solar cells and thermoelectrics, are discussed.
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Affiliation(s)
- Yoonseong Jung
- Department of Materials Science and Engineering and Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul, 08826, South Korea
| | - Wonsik Lee
- Department of Materials Science and Engineering and Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul, 08826, South Korea
| | - Seungbin Han
- Department of Materials Science and Engineering and Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul, 08826, South Korea
| | - Beom-Soo Kim
- Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, South Korea
| | - Seung-Jun Yoo
- Future Technology, LG Chem, Seoul, 07796, South Korea
| | - Hyejin Jang
- Department of Materials Science and Engineering and Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul, 08826, South Korea
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Yang H, Wang P, Yang Q, Wang D, Wang Y, Kuai L, Wang Z. Superelastic and multifunctional fibroin aerogels from multiscale silk micro-nanofibrils exfoliated via deep eutectic solvent. Int J Biol Macromol 2023; 224:1412-1422. [PMID: 36550790 DOI: 10.1016/j.ijbiomac.2022.10.228] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 10/19/2022] [Accepted: 10/24/2022] [Indexed: 11/05/2022]
Abstract
Superelastic silk fibroin (SF)-based aerogels can be used as multifunctional substrates, exhibiting a promising prospect in air filtration, thermal insulation, and biomedical materials. However, fabrication of the superelastic pure SF aerogels without adding synthetic polymers remains challenging. Here, the SF micro-nano fibrils (SMNFs) that preserved mesostructures are extracted from SF fibers as building blocks of aerogels by a controllable deep eutectic solvent liquid exfoliation technique. SMNFs can assemble into multiscale fibril networks during the freeze-inducing process, resulting in all-natural SMNF aerogels (SMNFAs) with hierarchical cellular architectures after lyophilization. Benefiting from these structural features, the SMNFAs demonstrate desirable properties including ultra-low density (as low as 4.71 mg/cm3) and superelasticity (over 85 % stress retention after 100 compression cycles at 60 % strain). Furthermore, the potential applications of superelastic SMNFAs in air purification and thermal insulation are investigated to exhibit their functionality, mechanical elasticity, and structural stability. This work provides a reliable approach for the fabrication of highly elastic SF aerogels and endows application prospects in air purification and thermal insulation opportunities.
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Affiliation(s)
- Haiwei Yang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Peng Wang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Qiliang Yang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Dengfeng Wang
- School of Materials Science & Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
| | - Yong Wang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Long Kuai
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China; School of Chemical and Environmental Engineering, Anhui Laboratory of Clean Catalytic Engineering, Anhui Laboratory of Functional Coordinated Complexes for Materials Chemistry and Application, Anhui Polytechnic University, Wuhu, Anhui 241000, China.
| | - Zongqian Wang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China.
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Li S, Wu F, Zhang X, Han G, Si Y, Yu J, Ding B. Flexible Al 2O 3/ZrO 2 nanofibrous membranes for thermal insulation. CrystEngComm 2022. [DOI: 10.1039/d1ce01512e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Flexible Al2O3/ZrO2 nanofibrous membranes of low density and high working temperature were fabricated by sol–gel electrospinning, and could be used for thermal-insulation applications.
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Affiliation(s)
- Shouzhen Li
- College of Textiles and Clothing, Qingdao University, Qingdao, Shandong, 266071, P.R. China
| | - Fan Wu
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 200051, P.R. China
| | - Xuan Zhang
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 200051, P.R. China
| | - Guangting Han
- College of Textiles and Clothing, Qingdao University, Qingdao, Shandong, 266071, P.R. China
| | - Yang Si
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 200051, P.R. China
| | - Jianyong Yu
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 200051, P.R. China
| | - Bin Ding
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 200051, P.R. China
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Iglesias-Mejuto A, García-González CA. 3D-printed alginate-hydroxyapatite aerogel scaffolds for bone tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 131:112525. [PMID: 34857304 DOI: 10.1016/j.msec.2021.112525] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 10/18/2021] [Accepted: 10/23/2021] [Indexed: 01/08/2023]
Abstract
3D-printing technology allows the automated and reproducible manufacturing of functional structures for tissue engineering with customized geometries and compositions by depositing materials layer-by-layer with high precision. For these purposes, the production of bioactive gel-based 3D-scaffolds made of biocompatible materials with well-defined internal structure comprising a dual (mesoporous and macroporous) and highly interconnected porosity is essential. In this work, aerogel scaffolds for bone regeneration purposes were obtained by an innovative strategy that combines the 3D-printing of alginate-hydroxyapatite (HA) hydrogels and the supercritical CO2 drying of the gels. BET and SEM analyses were performed to assess the textural parameters of the obtained aerogel scaffolds and the dimensional accuracy to the original computer-aided design (CAD) design was also evaluated. The biological characterization of the aerogel scaffolds was also carried out regarding cell viability, adhesion and migration capacity. The obtained alginate-HA aerogel scaffolds were highly porous, biocompatible, with high fidelity to the CAD-pattern and also allowed the attachment and proliferation of mesenchymal stem cells (MSCs). An enhancement of the fibroblast migration toward the damaged area was observed in the presence of the aerogel formulations tested, which is positive in terms of bone regeneration.
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Affiliation(s)
- Ana Iglesias-Mejuto
- Department of Pharmacology, Pharmacy and Pharmaceutical Technology, I+D Farma group (GI-1645), Faculty of Pharmacy and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Carlos A García-González
- Department of Pharmacology, Pharmacy and Pharmaceutical Technology, I+D Farma group (GI-1645), Faculty of Pharmacy and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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