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Qi J, Yang S, Jiang Y, Cheng J, Wang S, Rao Q, Jiang X. Liquid Metal-Polymer Conductor-Based Conformal Cyborg Devices. Chem Rev 2024; 124:2081-2137. [PMID: 38393351 DOI: 10.1021/acs.chemrev.3c00317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2024]
Abstract
Gallium-based liquid metal (LM) exhibits exceptional properties such as high conductivity and biocompatibility, rendering it highly valuable for the development of conformal bioelectronics. When combined with polymers, liquid metal-polymer conductors (MPC) offer a versatile platform for fabricating conformal cyborg devices, enabling functions such as sensing, restoration, and augmentation within the human body. This review focuses on the synthesis, fabrication, and application of MPC-based cyborg devices. The synthesis of functional materials based on LM and the fabrication techniques for MPC-based devices are elucidated. The review provides a comprehensive overview of MPC-based cyborg devices, encompassing their applications in sensing diverse signals, therapeutic interventions, and augmentation. The objective of this review is to serve as a valuable resource that bridges the gap between the fabrication of MPC-based conformal devices and their potential biomedical applications.
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Affiliation(s)
- Jie Qi
- Shenzhen Key Laboratory of Smart Healthcare Engineering, Guangdong Provincial Key Laboratory of Advanced Biomaterials, Department of Biomedical Engineering. Southern University of Science and Technology, No. 1088, Xueyuan Rd, Xili, Nanshan District, Shenzhen, Guangdong 518055, P. R. China
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target & Clinical Pharmacology, the NMPA and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences and the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, P. R. China
| | - Shuaijian Yang
- Shenzhen Key Laboratory of Smart Healthcare Engineering, Guangdong Provincial Key Laboratory of Advanced Biomaterials, Department of Biomedical Engineering. Southern University of Science and Technology, No. 1088, Xueyuan Rd, Xili, Nanshan District, Shenzhen, Guangdong 518055, P. R. China
| | - Yizhou Jiang
- Shenzhen Key Laboratory of Smart Healthcare Engineering, Guangdong Provincial Key Laboratory of Advanced Biomaterials, Department of Biomedical Engineering. Southern University of Science and Technology, No. 1088, Xueyuan Rd, Xili, Nanshan District, Shenzhen, Guangdong 518055, P. R. China
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, P. R. China
| | - Jinhao Cheng
- Shenzhen Key Laboratory of Smart Healthcare Engineering, Guangdong Provincial Key Laboratory of Advanced Biomaterials, Department of Biomedical Engineering. Southern University of Science and Technology, No. 1088, Xueyuan Rd, Xili, Nanshan District, Shenzhen, Guangdong 518055, P. R. China
| | - Saijie Wang
- Shenzhen Key Laboratory of Smart Healthcare Engineering, Guangdong Provincial Key Laboratory of Advanced Biomaterials, Department of Biomedical Engineering. Southern University of Science and Technology, No. 1088, Xueyuan Rd, Xili, Nanshan District, Shenzhen, Guangdong 518055, P. R. China
| | - Qingyan Rao
- Shenzhen Key Laboratory of Smart Healthcare Engineering, Guangdong Provincial Key Laboratory of Advanced Biomaterials, Department of Biomedical Engineering. Southern University of Science and Technology, No. 1088, Xueyuan Rd, Xili, Nanshan District, Shenzhen, Guangdong 518055, P. R. China
| | - Xingyu Jiang
- Shenzhen Key Laboratory of Smart Healthcare Engineering, Guangdong Provincial Key Laboratory of Advanced Biomaterials, Department of Biomedical Engineering. Southern University of Science and Technology, No. 1088, Xueyuan Rd, Xili, Nanshan District, Shenzhen, Guangdong 518055, P. R. China
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Manyuan N, Kawasaki H. Activated platinum in gallium-based room-temperature liquid metals for enhanced reduction reactions. RSC Adv 2023; 13:30273-30280. [PMID: 37849703 PMCID: PMC10577643 DOI: 10.1039/d3ra06571e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 10/10/2023] [Indexed: 10/19/2023] Open
Abstract
Room-temperature gallium-based liquid metals (LMs) have recently attracted significant attention worldwide for application in catalysis because of their unique combination of fluidic and catalytic properties. Platinum loading in LMs is expected to enhance the catalytic performance of various reaction systems. However, Pt-loaded methods for Ga-based LMs have not yet been sufficiently developed to improve the catalytic performance and Pt utilization efficiency. In this study, a novel method for the fabrication of Pt-incorporated LMs using Pt sputter deposition (Pt(dep)-LMs) was developed. The Pt(dep)-LMs contained well-dispersed Pt flakes with diameters of 0.89 ± 0.6 μm. The catalytic activity of the Pt(dep)-LM with a Pt loading of ∼0.7 wt% was investigated using model reactions such as methylene blue (MB) reduction and hydrogen production in an acidic aqueous solution. The Pt(dep)-LMs showed a higher MB reduction rate (three times) and hydrogen production (three times) than the LM loaded with conventional Pt black (∼0.7 wt%). In contrast to the Pt(dep)-LMs, solid-based Ga with a Pt loading of ∼0.7 wt% did not catalyze the reactions. These results demonstrate that Pt activation occurred in the Pt(dep)-LMs fabricated by Pt sputtering, and that the fluidic properties of the LMs enhanced the catalytic reduction reactions. Thus, these findings highlight the superior performance of the Pt deposition method and the advantages of using Pt-LM-based catalysts.
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Affiliation(s)
- Nichayanan Manyuan
- Department of Chemistry and Materials Engineering, Kansai University 3-3-35, Yamate-cho, Suita Osaka 564-8680 Japan
| | - Hideya Kawasaki
- Department of Chemistry and Materials Engineering, Kansai University 3-3-35, Yamate-cho, Suita Osaka 564-8680 Japan
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Ruffman C, Lambie S, Steenbergen KG, Gaston N. Structural and electronic changes in Ga-In and Ga-Sn alloys on melting. Phys Chem Chem Phys 2023; 25:1236-1247. [PMID: 36525244 DOI: 10.1039/d2cp04431e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The melting behaviour of surface slabs of Ga-In and Ga-Sn is studied using periodic density functional theory and ab initio molecular dynamics. Analysis of the structure and electronics of the solid and liquid phases gives insight into the properties of these alloys, and why they may act as promising CO2 reduction catalysts. We report melting points for slabs of hexa-layer Ga-In (386 K) and Ga-Sn (349 K) that are substantially lower than the pure hexa-layer Ga system (433 K), and attribute the difference to the degree to which the dopant (In or Sn) disrupts the layered Ga network. In molecular dynamics trajectories of the liquid structures, we find that dopant tends to migrate from the centre of the slab towards the surface and accumulate there. Bader charge calculations reveal that the surface dopant atoms have increased positive charge, and density of states analyses suggest the liquid alloys maintain metallic electronic behaviour. Thus, surface In and Sn may provide good binding sites for intermediates in CO2 reduction. This work contributes to our understanding of the properties of liquid metal systems, and provides a foundation for modelling catalysis on these materials.
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Affiliation(s)
- Charlie Ruffman
- MacDiarmid Institute for Advanced Materials and Nanotechnology and Department of Physics, University of Auckland, Private Bag 92019, Auckland, New Zealand.
| | - Stephanie Lambie
- MacDiarmid Institute for Advanced Materials and Nanotechnology and Department of Physics, University of Auckland, Private Bag 92019, Auckland, New Zealand.
| | - Krista G Steenbergen
- MacDiarmid Institute for Advanced Materials and Nanotechnology and School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand
| | - Nicola Gaston
- MacDiarmid Institute for Advanced Materials and Nanotechnology and Department of Physics, University of Auckland, Private Bag 92019, Auckland, New Zealand.
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Zhao Z, Soni S, Lee T, Nijhuis CA, Xiang D. Smart Eutectic Gallium-Indium: From Properties to Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2203391. [PMID: 36036771 DOI: 10.1002/adma.202203391] [Citation(s) in RCA: 25] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 07/30/2022] [Indexed: 05/27/2023]
Abstract
Eutectic gallium-indium (EGaIn), a liquid metal with a melting point close to or below room temperature, has attracted extensive attention in recent years due to its excellent properties such as fluidity, high conductivity, thermal conductivity, stretchability, self-healing capability, biocompatibility, and recyclability. These features of EGaIn can be adjusted by changing the experimental condition, and various composite materials with extended properties can be further obtained by mixing EGaIn with other materials. In this review, not only the are unique properties of EGaIn introduced, but also the working principles for the EGaIn-based devices are illustrated and the developments of EGaIn-related techniques are summarized. The applications of EGaIn in various fields, such as flexible electronics (sensors, antennas, electronic circuits), molecular electronics (molecular memory, opto-electronic switches, or reconfigurable junctions), energy catalysis (heat management, motors, generators, batteries), biomedical science (drug delivery, tumor therapy, bioimaging and neural interfaces) are reviewed. Finally, a critical discussion of the main challenges for the development of EGaIn-based techniques are discussed, and the potential applications in new fields are prospected.
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Affiliation(s)
- Zhibin Zhao
- Institute of Modern Optics and Center of Single Molecule Sciences, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Nankai University, 300350, Tianjin, P. R. China
| | - Saurabh Soni
- Department of Molecules and Materials, MESA+ Institute for Nanotechnology, Molecules Center and Center for Brain-Inspired Nano Systems, Faculty of Science and Technology, University of Twente, Enschede, 7500 AE, The Netherlands
| | - Takhee Lee
- Department of Physics and Astronomy, Institute of Applied Physics, Seoul National University, Seoul, 08826, Korea
| | - Christian A Nijhuis
- Department of Molecules and Materials, MESA+ Institute for Nanotechnology, Molecules Center and Center for Brain-Inspired Nano Systems, Faculty of Science and Technology, University of Twente, Enschede, 7500 AE, The Netherlands
| | - Dong Xiang
- Institute of Modern Optics and Center of Single Molecule Sciences, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Nankai University, 300350, Tianjin, P. R. China
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Yu L, Qi X, Liu Y, Chen L, Li X, Xia Y. Transportable, Endurable, and Recoverable Liquid Metal Powders with Mechanical Sintering Conductivity for Flexible Electronics and Electromagnetic Interference Shielding. ACS APPLIED MATERIALS & INTERFACES 2022; 14:48150-48160. [PMID: 36222480 DOI: 10.1021/acsami.2c14837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Liquid metals (LMs, e.g., EGaIn) promise a vast potential in accelerating the development of flexible electronics, smart robots, and wearable and biomedical devices. Although a variety of emerging processing methods are reported, they suffer several risks (e.g., leakage, weak adhesion, and low colloidal and chemical stability) because of their excellent fluidity, high surface tension, and rapid oxidation. Herein, liquid metal powders (LMPs) are fabricated based on a versatile method by vigorously stirring EGaIn with nonmetallic or organic particles through interfacial interactions. During the mixing process, EGaIn microdroplets are wrapped with a nonmetallic or an organic shell by electrostatic adsorption, and a more sticky oxide layer is constantly generated and then broken owing to the shearing friction. These transportable powders exhibit superior stability under extreme conditions (e.g., water and high temperature), being capable of recovering electrical conductivity and strong adhesion on different substrates upon mechanical sintering. A flexible, robust, and conductive coating can be constructed via swabbing with an integrated Joule heating effect and excellent electromagnetic interference shielding performances, and it is applicable in flexible wearable electronics, microcircuits, and wireless power transmission systems.
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Affiliation(s)
- Lei Yu
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, College of Materials Science and Engineering, Insititute of Marine Biobased Materials, Qingdao University, Ningxia Road 308, Qingdao 266071, P.R. China
| | - Xiulei Qi
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, College of Materials Science and Engineering, Insititute of Marine Biobased Materials, Qingdao University, Ningxia Road 308, Qingdao 266071, P.R. China
| | - Yide Liu
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, College of Materials Science and Engineering, Insititute of Marine Biobased Materials, Qingdao University, Ningxia Road 308, Qingdao 266071, P.R. China
| | - Long Chen
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, College of Materials Science and Engineering, Insititute of Marine Biobased Materials, Qingdao University, Ningxia Road 308, Qingdao 266071, P.R. China
| | - Xiankai Li
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, College of Materials Science and Engineering, Insititute of Marine Biobased Materials, Qingdao University, Ningxia Road 308, Qingdao 266071, P.R. China
| | - Yanzhi Xia
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, College of Materials Science and Engineering, Insititute of Marine Biobased Materials, Qingdao University, Ningxia Road 308, Qingdao 266071, P.R. China
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Duan L, Zhang Y, Zhao J, Zhang J, Li Q, Lu Q, Fu L, Liu J, Liu Q. New Strategy and Excellent Fluorescence Property of Unique Core-Shell Structure Based on Liquid Metals/Metal Halides. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2204056. [PMID: 36101903 DOI: 10.1002/smll.202204056] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 08/11/2022] [Indexed: 06/15/2023]
Abstract
The further applications of liquid metals (LMs) are limited by their common shortcoming of silver-white physical appearance, which deviates from the impose stringent requirements for color and aesthetics. Herein, a concept is proposed for constructing fluorescent core-shell structures based on the components and properties of LMs, and metal halides. The metal halides endow LMs with polychromatic and stable fluorescence characteristics. As a proof-of-concept, LMs-Al obtained by mixing of LMs with aluminum (Al) is reported. The surface of LMs-Al is transformed directly from Al to a multi-phase metal halide of K3 AlCl6 with double perovskites structure, via redox reactions with KCl + HCl solution in a natural environment. The formation of core-shell structure from the K3 AlCl6 and LMs is achieved, and the shell with different phases can emit a cyan light by the superimposition of the polychromatic spectrum. Furthermore, the LMs can be directly converted into a fluorescent shell without affecting their original features. In particular, the luminescence properties of shells can be regulated by the components in LMs. This study provides a new direction for research in spontaneous interfacial modification and fluorescent functionalization of LMs and promises potential applications, such as lighting and displays, anti-counterfeiting measures, sensing, and chameleon robots.
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Affiliation(s)
- Liangfei Duan
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, China
| | - Yumin Zhang
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, China
| | - Jianhong Zhao
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, China
| | - Jin Zhang
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, China
| | - Qian Li
- CAS Key Laboratory of Cryogenics and Beijing Key Laboratory of Cryo- Biomedical Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Qingjie Lu
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, China
| | - Li Fu
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, China
| | - Jing Liu
- CAS Key Laboratory of Cryogenics and Beijing Key Laboratory of Cryo- Biomedical Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- Department of Biomedical Engineering School of Medicine Tsinghua University Beijing, Beijing, 100084, China
| | - Qingju Liu
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, China
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Sartori A, Giri RP, Fujii H, Hövelmann SC, Warias JE, Jordt P, Shen C, Murphy BM, Magnussen OM. Role of chemisorbing species in growth at liquid metal-electrolyte interfaces revealed by in situ X-ray scattering. Nat Commun 2022; 13:5421. [PMID: 36109498 PMCID: PMC9477831 DOI: 10.1038/s41467-022-32932-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 08/22/2022] [Indexed: 11/22/2022] Open
Abstract
Liquid-liquid interfaces offer intriguing possibilities for nanomaterials growth. Here, fundamental interface-related mechanisms that control the growth behavior in these systems are studied for Pb halide formation at the interface between NaX + PbX2 (X = F, Cl, Br) and liquid Hg electrodes using in situ X-ray scattering and complementary electrochemical and microscopy measurements. These studies reveal a decisive role of the halide species in nucleation and growth of these compounds. In Cl- and Br-containing solution, deposition starts by rapid formation of well-defined ultrathin (∼7 Å) precursor adlayers, which provide a structural template for the subsequent quasi-epitaxial growth of c-axis oriented Pb(OH)X bulk crystals. In contrast, growth in F-containing solution proceeds by slow formation of a more disordered deposit, resulting in random bulk crystal orientations on the Hg surface. These differences can be assigned to the interface chemistry, specifically halide chemisorption, which steers the formation of these highly textured deposits at the liquid-liquid interface. Growth at liquid-liquid interfaces differ inherently from that on solids, making it attractive for nanomaterial formation. Here, the authors use X-ray scattering to derive a detailed microscopic picture of lead-halide growth on liquid mercury that reveals the key importance of anion adsorption.
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Duan L, Zhang Y, Zhao J, Zhang J, Li Q, Lu Q, Fu L, Liu J, Liu Q. Unique Surface Fluorescence Induced from the Core-Shell Structure of Gallium-Based Liquid Metals Prepared by Thermal Oxidation Processing. ACS APPLIED MATERIALS & INTERFACES 2022; 14:39654-39664. [PMID: 35979950 DOI: 10.1021/acsami.2c12420] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Liquid metals (LMs) have emerged as promising functional materials that combine the properties of both liquid and metal. These characteristics enabled them to find applications in many fields. However, the LMs usually can only display a silver-white physical appearance, which limits their further applications in the fields with the imposition of stringent requirements for color and aesthetics. Herein, we report that the surface of LMs was transformed directly from metal to fluorescent semiconductor layer by an example of eutectic GaInSn (eGaInSn) induced by thermal oxidation. Specifically, a core-shell structure is formed from the fluorescent layer and the LMs. The shell endows the LMs with fluorescence without affecting their interior fluidity and conductivity. In particular, the formation process as well as the degree of crystallization, phase transformation, and light emission of the fluorescent oxide shell on the surface of LMs is regulated by the component content. A thorough analysis of surface morphology, composition, structure, and properties of the fluorescent shell suggests that the Ga2O3 layer is formed on the surface of gallium-based LMs after their immersion in deionized water. Subsequently, thermal oxidation results in the formation of the β-Ga2O3 shell on the surface of liquid metals. Importantly, abundant oxygen vacancies (VO) in β-Ga2O3 as the donors and the gallium vacancies (VGa), gallium-oxygen vacancy pairs (VO-VGa), defect energy levels, and intrinsic defects as the acceptors enabled the light emission. The fluorescent LMs have promising potential for flexible lighting and displays, anticounterfeiting measures, sensing, and chameleon robots.
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Affiliation(s)
- Liangfei Duan
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, China
| | - Yumin Zhang
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, China
| | - Jianhong Zhao
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, China
| | - Jin Zhang
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, China
| | - Qian Li
- CAS Key Laboratory of Cryogenics and Beijing Key Laboratory of Cryo- Biomedical Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Qingjie Lu
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, China
| | - Li Fu
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, China
| | - Jing Liu
- CAS Key Laboratory of Cryogenics and Beijing Key Laboratory of Cryo- Biomedical Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Department of Biomedical Engineering School of Medicine Tsinghua University, Beijing 100084, China
| | - Qingju Liu
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, China
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Liquid-Metal-Mediated Electrocatalyst Support Engineering toward Enhanced Water Oxidation Reaction. NANOMATERIALS 2022; 12:nano12132153. [PMID: 35807989 PMCID: PMC9268020 DOI: 10.3390/nano12132153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/30/2022] [Accepted: 06/18/2022] [Indexed: 11/17/2022]
Abstract
Functional and robust catalyst supports are vital in the catalysis field, and the development of universal and efficient catalyst support is essential but challenging. Traditional catalyst fabrication methods include the carbonization of ordered templates and high−temperature dehydration. All these methods involve complicated meso−structural disordering and allow little control over morphology. To this end, a eutectic GaInSn alloy (EGaInSn) was proposed and employed as an intermediate to fabricate low−dimensional ordered catalyst support materials. Owing to the lower Gibbs free energy of Ga2O3 compared to certain types of metals (e.g., Al, Mn, Ce, etc.), we found that a skinny layer of metal oxides could be formed and exfoliated into a two−dimensional nanosheet at the interface of liquid metal (LM) and water. As such, EGaInSn was herein employed as a reaction matrix to synthesize a range of two−dimensional catalyst supports with large specific surface areas and structural stability. As a proof−of-concept, Al2O3 and MnO were fabricated with the assistance of LM and were used as catalyst supports for loading Ru, demonstrating enhanced structural stability and overall electrocatalytic performance in the oxygen evolution reaction. This work opens an avenue for the development of functional support materials mediated by LM, which would play a substantial role in electrocatalytic reactions and beyond.
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Kawasaki H, Otsuki T, Sugino F, Yamamoto K, Tokunaga T, Tokura R, Yonezawa T. A liquid metal catalyst for the conversion of ethanol into graphitic carbon layers under an ultrasonic cavitation field. Chem Commun (Camb) 2022; 58:7741-7744. [PMID: 35723415 DOI: 10.1039/d2cc02510h] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Eutectic gallium indium (EGaIn) has drawn considerable research interest in potential liquid catalysis. Herein, we report that EGaIn liquid metal acts as a catalyst for the growth of a graphitic carbon layer from ethanol under ultrasonication. High-speed imaging demonstrated the formation of ultrasonic cavitation bubbles at the liquid metal/ethanol interface, which facilitated the pyrolysis of ethanol into graphitic carbon on the liquid metal surface.
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Affiliation(s)
- Hideya Kawasaki
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, Suita-Shi, Osaka 564-8680, Japan.
| | - Tomoko Otsuki
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, Suita-Shi, Osaka 564-8680, Japan.
| | - Fumiya Sugino
- Department of Pure and Applied Physics, The Faculty of Engineering Science, Kansai University, Suita-Shi, Osaka 564-8680, Japan
| | - Ken Yamamoto
- Department of Pure and Applied Physics, The Faculty of Engineering Science, Kansai University, Suita-Shi, Osaka 564-8680, Japan
| | - Tomoharu Tokunaga
- Department Materials Science and Engineering, Faculty of Engineering, Nagoya University, Furo-Cho, Nagoya 464-8603, Japan
| | - Rintaro Tokura
- Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan.
| | - Tetsu Yonezawa
- Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan.
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Responsive Liquid Metal Droplets: From Bulk to Nano. NANOMATERIALS 2022; 12:nano12081289. [PMID: 35457997 PMCID: PMC9026530 DOI: 10.3390/nano12081289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/25/2022] [Accepted: 03/29/2022] [Indexed: 02/06/2023]
Abstract
Droplets exist widely in nature and play an extremely important role in a broad variety of industrial processes. Typical droplets, including water and oil droplets, have received extensive attention and research, however their single properties still cannot meet diverse needs. Fortunately, liquid metal droplets emerging in recent years possess outstanding properties, including large surface tension, excellent electrical and thermal conductivity, convenient chemical processing, easy transition between liquid and solid phase state, and large-scale deformability, etc. More interestingly, liquid metal droplets with unique features can respond to external factors, including the electronic field, magnetic field, acoustic field, chemical field, temperature, and light, exhibiting extraordinary intelligent response characteristics. Their development over the past decade has brought substantial breakthroughs and progress. To better promote the advancement of this field, the present article is devoted to systematically summarizing and analyzing the recent fundamental progress of responsive liquid metal droplets, not only involving droplet characteristics and preparation methods, but also focusing on their diverse response behaviors and mechanisms. On this basis, the challenges and prospects related to the following development of liquid metal droplets are also proposed. In the future, responsive liquid metal droplets with a rapid development trend are expected to play a key role in soft robots, biomedicine, smart matter, and a variety of other fields.
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Li X, Ding X, Du Y, Xiao C, Zheng K, Liu X, Tian X, Zhang X. Controlled Transformation of Liquid Metal Microspheres in Aqueous Solution Triggered by Growth of GaOOH. ACS OMEGA 2022; 7:7912-7919. [PMID: 35284708 PMCID: PMC8908526 DOI: 10.1021/acsomega.1c06897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 02/14/2022] [Indexed: 06/14/2023]
Abstract
Liquid metals (LMs) are playing an increasingly important role in the fields of flexible devices, electronics, and thermal management due to their low melting point and excellent thermal and electrical conductivity, and the transformation of LMs in deionized water has recently received much attention. In this paper, we investigate the transformation process of EGaIn microspheres in deionized water and propose a two-step process of microspherical transformation, whereby the microspheres are first deformed into a spindle shape and then into lamellar nanorods. It is also shown that the growth of GaOOH crystals drives the transformation. Based on this result, EGaIn microspheres with controllable transformation could be prepared, such as spindle or lamellar rod shapes, extending the application area of LMs.
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Affiliation(s)
- Xiaofei Li
- Key
Laboratory of Photovoltaic and Energy Conservation Materials, Institute
of Solid State Physics, HFIPS, Chinese Academy
of Sciences, Hefei 230031, China
- University
of Science and Technology of China, Hefei 230026, People’s
Republic of China
| | - Xin Ding
- Key
Laboratory of Photovoltaic and Energy Conservation Materials, Institute
of Solid State Physics, HFIPS, Chinese Academy
of Sciences, Hefei 230031, China
| | - Yuhang Du
- Key
Laboratory of Photovoltaic and Energy Conservation Materials, Institute
of Solid State Physics, HFIPS, Chinese Academy
of Sciences, Hefei 230031, China
- University
of Science and Technology of China, Hefei 230026, People’s
Republic of China
| | - Chao Xiao
- Key
Laboratory of Photovoltaic and Energy Conservation Materials, Institute
of Solid State Physics, HFIPS, Chinese Academy
of Sciences, Hefei 230031, China
| | - Kang Zheng
- Key
Laboratory of Photovoltaic and Energy Conservation Materials, Institute
of Solid State Physics, HFIPS, Chinese Academy
of Sciences, Hefei 230031, China
| | - Xianglan Liu
- Key
Laboratory of Photovoltaic and Energy Conservation Materials, Institute
of Solid State Physics, HFIPS, Chinese Academy
of Sciences, Hefei 230031, China
| | - Xingyou Tian
- Key
Laboratory of Photovoltaic and Energy Conservation Materials, Institute
of Solid State Physics, HFIPS, Chinese Academy
of Sciences, Hefei 230031, China
- University
of Science and Technology of China, Hefei 230026, People’s
Republic of China
| | - Xian Zhang
- Key
Laboratory of Photovoltaic and Energy Conservation Materials, Institute
of Solid State Physics, HFIPS, Chinese Academy
of Sciences, Hefei 230031, China
- University
of Science and Technology of China, Hefei 230026, People’s
Republic of China
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13
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Gil J, Oda T. Correction methods for first-principles calculations of the solution enthalpy of gases and compounds in liquid metals. Phys Chem Chem Phys 2022; 24:757-770. [PMID: 34877579 DOI: 10.1039/d1cp02450g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Liquid metals (LMs) have a wide range of engineering applications, such as in coolants, batteries, and flexible electronics. While accurate calculation methods for thermodynamic properties based on density functional theory (DFT) have been extensively developed for solid materials, including methods to correct identified systematic errors, almost no attempt has been made for LMs. In the present study, four correction methods for the first-principles calculation of the solution enthalpy of gases and compounds in LMs are proposed, namely, Correction-1, using the experimental binding energy of an impurity gas molecule; Correction-2, additionally using the experimental enthalpy of formation of a solid compound composed of LM and gas-impurity elements; Correction-3, using the concept of the fitted elemental-phase reference energies (FERE) method; and Correction-4, using the concept of the coordination corrected enthalpies (CCE) method. The performance of each method is examined with hydrogen, nitrogen, oxygen, and iodine gases and their sodium compounds in liquid sodium, and the operating principle of each method is clarified. In general, the four correction methods effectively reduce the calculation error, and Correction-2 reduces the error to less than 10 kJ mol-1, while the uncorrected errors are up to several tens of kJ mol-1. This study demonstrates that, with appropriate correction, the DFT calculation of the solution enthalpy of impurities in LMs can achieve the same level of accuracy as in precise experiments.
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Affiliation(s)
- Junhyoung Gil
- Department of Nuclear Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea.
| | - Takuji Oda
- Department of Nuclear Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea.
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14
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Supported Cu/W/Mo/Ni—Liquid Metal Catalyst with Core-Shell Structure for Photocatalytic Degradation. Catalysts 2021. [DOI: 10.3390/catal11111419] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Room-temperature liquid metal is a very ideal material for the design of catalytic materials. At low temperatures, the liquid metal enters the liquid state. It provides an opportunity to utilize the liquid phase in the catalysis, which is far superior to the traditional solid-phase catalyst. Aiming at the low performance and narrow application scope of the existing single-phase liquid metal catalyst, this paper proposed a type of liquid metal/metal oxide core-shell composite multi-metal catalyst. The Ga2O3 core-shell heterostructure was formed by chemical modification of liquid metals with different nano metals Cu/W/Mo/Ni, and it was applied to photocatalytic degrading organic contaminated raw liquor. The effects of different metal species on the rate of catalytic degradation were explored. The selectivity and stability of the LM/MO core-shell composite catalytic material were clarified, and it was found that the Ni-LM catalyst could degrade methylene blue and Congo red by 92% and 79%, respectively. The catalytic mechanism and charge transfer mechanism were revealed by combining the optical band gap value. Finally, we provided a theoretical basis for the further development of liquid metal photocatalytic materials in the field of new energy environments.
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15
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Ma J, Bharambe VT, Persson KA, Bachmann AL, Joshipura ID, Kim J, Oh KH, Patrick JF, Adams JJ, Dickey MD. Metallophobic Coatings to Enable Shape Reconfigurable Liquid Metal Inside 3D Printed Plastics. ACS APPLIED MATERIALS & INTERFACES 2021; 13:12709-12718. [PMID: 33236879 DOI: 10.1021/acsami.0c17283] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Liquid metals adhere to most surfaces despite their high surface tension due to the presence of a native gallium oxide layer. The ability to change the shape of functional fluids within a three-dimensional (3D) printed part with respect to time is a type of four-dimensional printing, yet surface adhesion limits the ability to pump liquid metals in and out of cavities and channels without leaving residue. Rough surfaces prevent adhesion, but most methods to roughen surfaces are difficult or impossible to apply on the interior of parts. Here, we show that silica particles suspended in an appropriate solvent can be injected inside cavities to coat the walls. This technique creates a transparent, nanoscopically rough (10-100 nm scale) coating that prevents adhesion of liquid metals on various 3D printed plastics and commercial polymers. Liquid metals roll and even bounce off treated surfaces (the latter occurs even when dropped from heights as high as 70 cm). Moreover, the coating can be removed locally by laser ablation to create selective wetting regions for metal patterning on the exterior of plastics. To demonstrate the utility of the coating, liquid metals were dynamically actuated inside a 3D printed channel or chamber without pinning the oxide, thereby demonstrating electrical circuits that can be reconfigured repeatably.
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Affiliation(s)
- Jinwoo Ma
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh 27695, North Carolina, United States
| | - Vivek T Bharambe
- Department of Electrical and Computer Engineering, North Carolina State University, Raleigh 27695, North Carolina, United States
| | - Karl A Persson
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh 27695, North Carolina, United States
| | - Adam L Bachmann
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh 27695, North Carolina, United States
| | - Ishan D Joshipura
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh 27695, North Carolina, United States
| | - Jongbeom Kim
- Department of Material Science and Engineering, Seoul National University, Seoul 151-742, South Korea
| | - Kyu Hwan Oh
- Department of Material Science and Engineering, Seoul National University, Seoul 151-742, South Korea
| | - Jason F Patrick
- Department of Civil, Construction, and Environmental Engineering, North Carolina State University, Raleigh 27695, North Carolina, United States
| | - Jacob J Adams
- Department of Electrical and Computer Engineering, North Carolina State University, Raleigh 27695, North Carolina, United States
| | - Michael D Dickey
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh 27695, North Carolina, United States
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16
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Liu L, Wang D, Rao W. Mini/Micro/Nano Scale Liquid Metal Motors. MICROMACHINES 2021; 12:280. [PMID: 33800226 PMCID: PMC8001611 DOI: 10.3390/mi12030280] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 02/25/2021] [Accepted: 03/03/2021] [Indexed: 12/13/2022]
Abstract
Swimming motors navigating in complex fluidic environments have received tremendous attention over the last decade. In particular, liquid metal (LM) as a new emerging material has shown considerable potential in furthering the development of swimming motors, due to their unique features such as fluidity, softness, reconfigurability, stimuli responsiveness, and good biocompatibility. LM motors can not only achieve directional motion but also deformation due to their liquid nature, thus providing new and unique capabilities to the field of swimming motors. This review aims to provide an overview of the recent advances of LM motors and compare the difference in LM macro and micromotors from fabrication, propulsion, and application. Here, LM motors below 1 cm, named mini/micro/nano scale liquid metal motors (MLMTs) will be discussed. This work will present physicochemical characteristics of LMs and summarize the state-of-the-art progress in MLMTs. Finally, future outlooks including both opportunities and challenges of mini/micro/nano scale liquid metal motors are also provided.
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Affiliation(s)
- Li Liu
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (L.L.); (D.W.)
- Beijing Key Lab of CryoBiomedical Engineering and Key Lab of Cryogenics, Beijing 100190, China
- School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100039, China
| | - Dawei Wang
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (L.L.); (D.W.)
- Beijing Key Lab of CryoBiomedical Engineering and Key Lab of Cryogenics, Beijing 100190, China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Rao
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (L.L.); (D.W.)
- Beijing Key Lab of CryoBiomedical Engineering and Key Lab of Cryogenics, Beijing 100190, China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China
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17
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Chen S, Deng Z, Liu J. High performance liquid metal thermal interface materials. NANOTECHNOLOGY 2021; 32:092001. [PMID: 33207322 DOI: 10.1088/1361-6528/abcbc2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Conventional thermal interface materials (TIMs) as widely used in thermal management area is inherently limited by their relatively low thermal conductivity. From an alternative, the newly emerging liquid metal based thermal interface materials (LM-TIMs) open a rather promising way, which can pronouncedly improve the thermal contact resistance and offers tremendous opportunities for making powerful thermal management materials. The LM-TIMs thus prepared exhibits superior thermal conductivity over many conventional TIMs which guarantees its significant application prospect. And the nanoparticles mediated or tuned liquid metal further enable ever conductive LM-TIMs which suggests the ultimate goal of thermal management. In this review, a systematic interpretation on the basic features of LM-TIMs was presented. Representative exploration and progress on LM-TIMs were summarized. Typical approaches toward nanotechnology enhanced high performance LM-TIMs were illustrated. The perspect of this new generation thermal management material were outlined. Some involved challenges were raised. This work is expected to provide a guide line for future research in this field.
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Affiliation(s)
- Sen Chen
- Beijing Key Lab of Cryo-Biomedical Engineering, Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, People's Republic of China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China
- Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Zhongshan Deng
- Beijing Key Lab of Cryo-Biomedical Engineering, Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, People's Republic of China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China
- Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Jing Liu
- Beijing Key Lab of Cryo-Biomedical Engineering, Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, People's Republic of China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China
- Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, People's Republic of China
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, People's Republic of China
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18
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Wei Q, Sun M, Lorandi F, Yin R, Yan J, Liu T, Kowalewski T, Matyjaszewski K. Cu-Catalyzed Atom Transfer Radical Polymerization in the Presence of Liquid Metal Micro/Nanodroplets. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02702] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Qiangbing Wei
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Mingkang Sun
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Francesca Lorandi
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Rongguan Yin
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Jiajun Yan
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Tong Liu
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Tomasz Kowalewski
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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19
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Liu Y, Zhang W, Wang H. Synthesis and application of core-shell liquid metal particles: a perspective of surface engineering. MATERIALS HORIZONS 2021; 8:56-77. [PMID: 34821290 DOI: 10.1039/d0mh01117g] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Liquid metal micro/nano particles (LMPs) from gallium and its alloys have attracted tremendous attention in the last decade due to the unique combination of their metallic and fluidic properties at relatively low temperatures. Unfortunately, there is limited success so far in realizing the highly controllable fabrication and functionalization of this emerging material, posing great obstacles to further promoting its fundamental and applied studies. This review aims to explore solutions for the on-demand design and manipulation of LMPs through physicochemically engineering their surface microenvironment, including compositions, structures, and properties, which are featured by the encapsulation of LMPs inside a variety of synthetic shell architectures. These heterophase, core-shell liquid metal composites display adjustable size and structure-property relationships, rendering improved performances in several attractive scenarios including but not limited to soft electronics, nano/biomedicine, catalysis, and energy storage/conversion. Challenges and opportunities regarding this burgeoning field are also disclosed at the end of this review.
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Affiliation(s)
- Yong Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, No. 11 Zhongguancun Beiyitiao, Beijing 100190, P. R. China.
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20
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Nishikawa Y, Ohtsuka Y, Ogihara H, Rattanawan R, Gao M, Nakayama A, Hasegawa JY, Yamanaka I. Catalytic Mechanism of Liquid-Metal Indium for Direct Dehydrogenative Conversion of Methane to Higher Hydrocarbons. ACS OMEGA 2020; 5:28158-28167. [PMID: 33163798 PMCID: PMC7643202 DOI: 10.1021/acsomega.0c03827] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 10/12/2020] [Indexed: 06/11/2023]
Abstract
There is a great interest in direct conversion of methane to valuable chemicals. Recently, we reported that silica-supported liquid-metal indium catalysts (In/SiO2) were effective for direct dehydrogenative conversion of methane to higher hydrocarbons. However, the catalytic mechanism of liquid-metal indium has not been clear. Here, we show the catalytic mechanism of the In/SiO2 catalyst in terms of both experiments and calculations in detail. Kinetic studies clearly show that liquid-metal indium activates a C-H bond of methane and converts methane to ethane. The apparent activation energy of the In/SiO2 catalyst is 170 kJ mol-1, which is much lower than that of SiO2, 365 kJ mol-1. Temperature-programmed reactions in CH4, C2H6, and C2H4 and reactivity of C2H6 for the In/SiO2 catalyst indicate that indium selectively activates methane among hydrocarbons. In addition, density functional theory calculations and first-principles molecular dynamics calculations were performed to evaluate activation free energy for methane activation, its reverse reaction, CH3-CH3 coupling via Langmuir-Hinshelwood (LH) and Eley-Rideal mechanisms, and other side reactions. A qualitative level of interpretation is as follows. CH3-In and H-In species form after the activation of methane. The CH3-In species wander on liquid-metal indium surfaces and couple each other with ethane via the LH mechanism. The solubility of H species into the bulk phase of In is important to enhance the coupling of CH3-In species to C2H6 by decreasing the formation of CH4 though the coupling of CH3-In species and H-In species. Results of isotope experiments by combinations of CD4, CH4, D2, and H2 corresponded to the LH mechanism.
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Affiliation(s)
- Yuta Nishikawa
- Department
of Chemical Science and Engineering, School of Materials and Chemical
Technology, Tokyo Institute of Technology, Tokyo 152-8552, Japan
| | - Yuhki Ohtsuka
- Institute
for Catalysis, Hokkaido University, Hokkaido 001-0021, Japan
| | - Hitoshi Ogihara
- Graduate
School of Science and Engineering, Saitama
University, Saitama 338-8570, Japan
| | | | - Min Gao
- Institute
for Catalysis, Hokkaido University, Hokkaido 001-0021, Japan
| | - Akira Nakayama
- Graduate
School of Engineering, Department of Chemical System Engineering, University of Tokyo, Tokyo 113-8656, Japan
| | - Jun-ya Hasegawa
- Institute
for Catalysis, Hokkaido University, Hokkaido 001-0021, Japan
| | - Ichiro Yamanaka
- Department
of Chemical Science and Engineering, School of Materials and Chemical
Technology, Tokyo Institute of Technology, Tokyo 152-8552, Japan
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21
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Kobera L, Havlin J, Abbrent S, Rohlicek J, Streckova M, Sopcak T, Kyselova V, Czernek J, Brus J. Gallium Species Incorporated into MOF Structure: Insight into the Formation of a 3D Polycrystalline Gallium-Imidazole Framework. Inorg Chem 2020; 59:13933-13941. [PMID: 32935544 DOI: 10.1021/acs.inorgchem.0c01563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The formation of a polycrystalline 3D gallium-imidazole framework (MOF) was closely studied in three steps using ssNMR, XRPD, and TGA. In all steps, the reaction products show relatively high temperature stability up to 500 °C. The final product was examined by structural analysis using NMR crystallography combined with TG and BET analyses, which enabled a detailed characterization of the polycrystalline MOF system on the atomic-resolution level. 71Ga ssNMR spectra provided valuable structural information on the coexistence of several distinct gallium species, including a tunable liquid phase. Moreover, using an NMR crystallography approach, two structurally asymmetric units of Ga(Im6)6- incorporated into the thermally stable polycrystalline 3D matrix were identified. Prepared polycrystalline MOF material with polymorphic gallium species is promising for use in catalytic processes.
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Affiliation(s)
- Libor Kobera
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovskeho Nam. 2, 162 06 Prague 6, Czech Republic
| | - Jakub Havlin
- University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Prague, Czech Republic
| | - Sabina Abbrent
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovskeho Nam. 2, 162 06 Prague 6, Czech Republic
| | - Jan Rohlicek
- Department of Structural Analysis, Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 182 21 Praha 8, Czech Republic
| | - Magdalena Streckova
- Institute of Materials Research of the Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovak Republic
| | - Tibor Sopcak
- Institute of Materials Research of the Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovak Republic
| | - Veronika Kyselova
- University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Prague, Czech Republic
| | - Jiri Czernek
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovskeho Nam. 2, 162 06 Prague 6, Czech Republic
| | - Jiri Brus
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovskeho Nam. 2, 162 06 Prague 6, Czech Republic
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22
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Li X, Li M, Shou Q, Zhou L, Ge A, Pei D, Li C. Liquid Metal Initiator of Ring-Opening Polymerization: Self-Capsulation into Thermal/Photomoldable Powder for Multifunctional Composites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2003553. [PMID: 32954573 DOI: 10.1002/adma.202003553] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/11/2020] [Indexed: 05/15/2023]
Abstract
Liquid metal nanodroplets not only share similar metallic properties and nanoscale effect with solid metal nanoparticles, but also possess the additional uniqueness in nonvolatile fluidity and ambient sintering ability into continuous conductors. In most cases, liquid metal nanodroplets are encapsulated into ultrathin and fragile shells of oxides and amphiphile monolayers, and may be hindered from incorporating homogeneously into various composites through conventional processing methods. In this study, ring-opening polymerization is found to be initiated by sonicating the liquid metal EGaIn in fluidic lactones. By this in situ polymerization, EGaIn nanodroplets are encapsulated into polylactone shells with tunable thickness, which can further be dried into a solid powder. Besides high chemical stability and dispersibility in organic solvents, the powder of the EGaIn capsules combines the exceptional properties of the EGaIn droplets (e.g., photothermal effect) and the polylactone shells (e.g., biocompatibility, biodegradability, and compatibility with different polymer matrixes), being capable of being introduced into thermoplastic composites through liquid casting and thermal- or photomolding for the notch-insensitive tearing property, sintering-induced electric conductivity, and photothermal effect. Thus, the EGaIn initiator of ring-opening polymerization may start a pathway to produce stable andthermal/photomoldable powders of EGaIn capsules and their multifunctionalcomposites, applicable in biomedicines, soft electronics, and smart robots.
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Affiliation(s)
- Xiankai Li
- Group of Biomimetic Smart Materials, CAS Key Lab of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Songling Road 189, Qingdao, 266101, P. R. China
- Center of Material and Optoelectronics Engineering, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, P. R. China
| | - Mingjie Li
- Group of Biomimetic Smart Materials, CAS Key Lab of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Songling Road 189, Qingdao, 266101, P. R. China
- Center of Material and Optoelectronics Engineering, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, P. R. China
| | - Qinghui Shou
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Songling Road 189, Qingdao, 266101, P. R. China
| | - Li Zhou
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Songling Road 189, Qingdao, 266101, P. R. China
| | - Anle Ge
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Songling Road 189, Qingdao, 266101, P. R. China
| | - Danfeng Pei
- Group of Biomimetic Smart Materials, CAS Key Lab of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Songling Road 189, Qingdao, 266101, P. R. China
| | - Chaoxu Li
- Group of Biomimetic Smart Materials, CAS Key Lab of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Songling Road 189, Qingdao, 266101, P. R. China
- Center of Material and Optoelectronics Engineering, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, P. R. China
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23
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Wei Q, Sun M, Wang Z, Yan J, Yuan R, Liu T, Majidi C, Matyjaszewski K. Surface Engineering of Liquid Metal Nanodroplets by Attachable Diblock Copolymers. ACS NANO 2020; 14:9884-9893. [PMID: 32649179 DOI: 10.1021/acsnano.0c02720] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Liquid metal (LM) micro/nano droplets have promising applications in various fields such as flexible electronics, catalysis, and soft composites as well as biomedicines. However, the preparation of highly stable LM nanodroplets suspension based on eutectic gallium/indium (EGaIn) alloys is still challenging. Herein, we report a general and robust strategy to fabricate EGaIn nanodroplets stabilized by polymer brushes (polymer brushes/EGaIn nanodroplets) via in situ attachment of well-defined diblock copolymers with short poly(acrylic acid) (PAA) anchoring segments. Under ultrasonication, the anchoring PAA block is in situ attached onto the gallium oxide "skin" layer of EGaIn nanodroplets to form polymer brushes. The attachable diblock copolymer surfactants allow for highly efficient formation of EGaIn nanodroplets in high yield and with narrow size distribution. The polymer brushes/EGaIn nanodroplets contain very low fractions of attached polymer (<1 wt %) and exhibit high colloidal stability (>30 days) and good redispersibility. Precise control of polymer architecture by atom-transfer radical polymerization was employed to prepare various block copolymers for suspensions in a variety of solvents.
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Affiliation(s)
- Qiangbing Wei
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Mingkang Sun
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Zongyu Wang
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Jiajun Yan
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Rui Yuan
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Tong Liu
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Carmel Majidi
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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Xu B, Chang G, Li R. A versatile approach for preparing stable and high concentration liquid metal nanoparticles on a large scale. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2020.1798776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Bingbing Xu
- College of Textile and Clothing Engineering, Soochow University, Suzhou, China
| | - Guangtao Chang
- College of Textile and Clothing Engineering, Soochow University, Suzhou, China
| | - Ruoxin Li
- College of Textile and Clothing Engineering, Soochow University, Suzhou, China
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25
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Yu D, Liao Y, Song Y, Wang S, Wan H, Zeng Y, Yin T, Yang W, He Z. A Super-Stretchable Liquid Metal Foamed Elastomer for Tunable Control of Electromagnetic Waves and Thermal Transport. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2000177. [PMID: 32596119 PMCID: PMC7312308 DOI: 10.1002/advs.202000177] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/22/2020] [Indexed: 05/18/2023]
Abstract
It is remarkably desirable and challenging to design a stretchable conductive material with tunable electromagnetic-interference (EMI) shielding and heat transfer for applications in flexible electronics. However, the existing materials sustained a severe attenuation of performances when largely stretched. Here, a super-stretchable (800% strain) liquid metal foamed elastomer composite (LMF-EC) is reported, achieving super-high electrical (≈104 S cm-1) and thermal (17.6 W mK-1) conductivities under a large strain of 400%, which also exhibits unexpected stretching-enhanced EMI shielding effectiveness of 85 dB due to the conductive network elongation and reorientation. By varying the liquid and solid states of LMF, the stretching can enable a multifunctional reversible switch that simultaneously regulates the thermal, electrical, and electromagnetic wave transport. Novel flexible temperature control and a thermoelectric system based on LMF-EC is furthermore developed. This work is a significant step toward the development of smart electromagnetic and thermal regulator for stretchable electronics.
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Affiliation(s)
- Dehai Yu
- Department of Vehicle EngineeringCollege of EngineeringChina Agricultural UniversityBeijing100083China
| | - Yue Liao
- Department of Vehicle EngineeringCollege of EngineeringChina Agricultural UniversityBeijing100083China
| | - Yingchao Song
- Department of Vehicle EngineeringCollege of EngineeringChina Agricultural UniversityBeijing100083China
| | - Shilong Wang
- Department of Vehicle EngineeringCollege of EngineeringChina Agricultural UniversityBeijing100083China
| | - Haoyu Wan
- Department of Vehicle EngineeringCollege of EngineeringChina Agricultural UniversityBeijing100083China
| | - Yanhong Zeng
- Department of Vehicle EngineeringCollege of EngineeringChina Agricultural UniversityBeijing100083China
| | - Tao Yin
- Department of Vehicle EngineeringCollege of EngineeringChina Agricultural UniversityBeijing100083China
| | - Wenhao Yang
- Department of Vehicle EngineeringCollege of EngineeringChina Agricultural UniversityBeijing100083China
| | - Zhizhu He
- Department of Vehicle EngineeringCollege of EngineeringChina Agricultural UniversityBeijing100083China
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26
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Idrus-Saidi SA, Tang J, Yang J, Han J, Daeneke T, O’Mullane AP, Kalantar-Zadeh K. Liquid Metal-Based Route for Synthesizing and Tuning Gas-Sensing Elements. ACS Sens 2020; 5:1177-1189. [PMID: 32223132 DOI: 10.1021/acssensors.0c00233] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
There is a strong demand for developing tunable and facile routes for synthesizing gas-sensitive semiconducting compounds. The concept of synthesizing micro- and nanoparticles of metallic compounds in a tunable process, which relies on liquid metals, is presented here. This is a liquid-based ultrasonication procedure within which additional metallic elements (In, Sn, and Zn) are incorporated into liquid Ga that is sonicated in a secondary solvent. We investigate liquid metal sonication in dimethyl sulfoxide (DMSO) and water to show their impact on the size, morphology, and crystal structure of the particulated products. The synthesized materials are annealed to investigate their responses to model reducing (H2) and oxidizing (NO2) gas species. The preparation process in DMSO gives rise to predominantly monoclinic Ga2O3 crystals which are favorable for gas sensing, while the emergence of rhombohedral Ga2O3 phases from the water sonication process led to inactive samples. The ease of tunability without hazardous precursors during the synthesis procedure is demonstrated. The route presented here can be uniquely employed for designing and engineering on-demand functional materials for sensing applications.
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Affiliation(s)
- Shuhada A. Idrus-Saidi
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Jianbo Tang
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Jiong Yang
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Jialuo Han
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Torben Daeneke
- School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia
| | - Anthony P. O’Mullane
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4001, Australia
| | - Kourosh Kalantar-Zadeh
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
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27
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Liu Y, Wang Q, Deng J, Zhang W. A liquid metal composite by ZIF-8 encapsulation. Chem Commun (Camb) 2020; 56:1851-1854. [PMID: 31950950 DOI: 10.1039/c9cc09330c] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new composite material positioning a liquid metal core within a zeolitic imidazolate framework shell is developed. The core-shell interactions along with the structure/properties of the composite material can be easily regulated by the ligand/metal ion ratio. Enhanced photothermal conversion of the liquid metal core is achieved after ZIF-8 encapsulation.
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Affiliation(s)
- Yong Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, No. 11 Zhongguancun Beiyitiao, Beijing 100190, P. R. China.
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28
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Gan T, Handschuh‐Wang S, Shang W, Shen J, Zhu L, Xiao Q, Hu S, Zhou X. Liquid Metal–Mediated Mechanochemical Polymerization. Macromol Rapid Commun 2019; 40:e1900537. [DOI: 10.1002/marc.201900537] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 10/28/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Tiansheng Gan
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518055 P. R. China
| | - Stephan Handschuh‐Wang
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518055 P. R. China
| | - Wenhui Shang
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518055 P. R. China
- Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ)Shenzhen University Shenzhen 518055 P. R. China
| | - Jiayan Shen
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518055 P. R. China
- Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ)Shenzhen University Shenzhen 518055 P. R. China
| | - Lifei Zhu
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518055 P. R. China
- Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ)Shenzhen University Shenzhen 518055 P. R. China
| | - Qi Xiao
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518055 P. R. China
| | - Shuangyan Hu
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518055 P. R. China
| | - Xuechang Zhou
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518055 P. R. China
- Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ)Shenzhen University Shenzhen 518055 P. R. China
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29
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Oloye O, Tang C, Du A, Will G, O'Mullane AP. Galvanic replacement of liquid metal galinstan with Pt for the synthesis of electrocatalytically active nanomaterials. NANOSCALE 2019; 11:9705-9715. [PMID: 31066435 DOI: 10.1039/c9nr02458a] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The galvanic replacement reaction is a verstile method for the fabrication of bimetallic nanomaterials which is usually limited to solid precursors. Here we report on the galvanic replacement of liquid metal galinstan with Pt which predominantly results in the formation of a Pt5Ga1 material. During the galvanic replacement process an interesting phenomenon was observed whereby a plume of nanomaterial is ejected upwards from the centre of the liquid metal droplet into solution which is due to surface tension gradients on the liquid metal surface that induces surface convection. It was also found that hydrogen gas was liberated during the process facilitated by the formation of the Pt rich nanomaterial which is a highly effective catalyst for the hydrogen evolution reaction (HER). The material was characterised by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction and dynamic light scattering measurements. It was found that Pt5Ga1 was highly effective for the electrochemical oxidation of methanol and ethanol and outperformed a commercial Pt/C catalyst. Density functional theory calculations confirmed that the increased activity is due to the anti poisoning properties of the surface towards CO upon the incorporation of Ga atoms into a Pt catalyst. The use of liquid metals and galvanic replacement offers a simple approach to fabricating Ga based alloy nanomaterials that may have use in many other types of applications.
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Affiliation(s)
- Olawale Oloye
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia.
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30
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Chen S, Liu J. Spontaneous Dispersion and Large-Scale Deformation of Gallium-Based Liquid Metal Induced by Ferric Ions. J Phys Chem B 2019; 123:2439-2447. [PMID: 30777756 DOI: 10.1021/acs.jpcb.8b12115] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A gallium-based liquid metal (LM) exhibits the largest interfacial tension among all the room-temperature liquids, which gives it strong deformability and promises its role in the field of soft machines. Paradoxically, such a material always remains nearly spherical in solution because of large interfacial tension, which in turn hinders the construction of LM-based soft machines. Consequently, it is of significant theoretical and practical value to regulate the interfacial tension of a LM in order to carry out richer deformation. In this study, spontaneous dispersion and large-scale deformation of a bulk LM were disclosed to be induced by ferric ions. It was found that the bulk LM immersed in the FeCl3 solution can spontaneously disperse into a large amount of droplets. In addition, the dispersed LM droplets could move and deform by increasing the concentration of the solution or adding acids. The mechanisms behind the untraditional phenomena lie in the nonuniform interfacial tension over the entire surface of the LM, which is associated with the space-time distribution of the FeCl3 solution. Further, directional locomotion and periodic oscillation occur because of the nonuniform interfacial tension, which leads to the autonomous dispersion and deformation of the LM. Overall, the unique redox reactions between the LM and the FeCl3 solution play an essential role in ensuring the continuity of deformation. The present spontaneous dispersion and deformation capability of the LM signify a paradigm shift and open up new possibilities for the development of chemistry-enabled soft machines in the future.
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Affiliation(s)
- Sen Chen
- Beijing Key Lab of Cryo-Biomedical Engineering and Key Lab of Cryogenics, Technical Institute of Physics and Chemistry , Chinese Academy of Sciences , Beijing 100190 , China.,School of Future Technology , University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Jing Liu
- Beijing Key Lab of Cryo-Biomedical Engineering and Key Lab of Cryogenics, Technical Institute of Physics and Chemistry , Chinese Academy of Sciences , Beijing 100190 , China.,School of Future Technology , University of Chinese Academy of Sciences , Beijing 100049 , China.,Department of Biomedical Engineering, School of Medicine , Tsinghua University , Beijing 100084 , China
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31
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Handschuh-Wang S, Chen Y, Zhu L, Gan T, Zhou X. Electric Actuation of Liquid Metal Droplets in Acidified Aqueous Electrolyte. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:372-381. [PMID: 30575374 DOI: 10.1021/acs.langmuir.8b03384] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The electric actuation of room-temperature liquid metals, such as Galinstan (gallium-indium-tin), has largely been conducted in alkaline electrolyte. Addition of surface-active anions and a proper acidic pH are expected to influence the interfacial tension of the liquid metal due to a high surface charge density. Hence, it should be possible to actuate liquid metals in such acidic environments. To ascertain this, at first, the dependence of the interfacial tension of Galinstan in NaOH, acidified KI, and acidified NaCl electrolyte on the concentration of the surface-active anions OH-, I-, and Cl-, respectively, were studied. Subsequently, a systematic study of the actuation of Galinstan in acidified KI electrolyte was executed and compared to actuation in alkaline medium. In the presence of HCl and acidified NaCl electrolyte, the interfacial tension of Galinstan is only marginally altered, while acidified KI solution reduced the interfacial tension of Galinstan significantly from 470.8 ± 1.4 (no KI) to 370.6 ± 4.1 mN/m (5 M KI) due to the high surface charge density of the electric double layer. Therefore, in acidified electrolyte in the presence of surface-active anions, the electrically actuated motion of LM can be realized. In particular, the actuation of Galinstan achieves a higher average and maximum speed at lower applied voltage and power consumption for acidified KI electrolyte. The formation of high surface charge density in acidified environments signifies a paradigm shift and opens up new possibilities to tune interfacial tension and controlled LM droplet motion of room-temperature liquid metals.
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Affiliation(s)
- Stephan Handschuh-Wang
- College of Chemistry and Environmental Engineering , Shenzhen University , Shenzhen 518060 , P. R. China
| | - Yuzhen Chen
- College of Chemistry and Environmental Engineering , Shenzhen University , Shenzhen 518060 , P. R. China
| | - Lifei Zhu
- College of Chemistry and Environmental Engineering , Shenzhen University , Shenzhen 518060 , P. R. China
| | - Tiansheng Gan
- College of Chemistry and Environmental Engineering , Shenzhen University , Shenzhen 518060 , P. R. China
| | - Xuechang Zhou
- College of Chemistry and Environmental Engineering , Shenzhen University , Shenzhen 518060 , P. R. China
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32
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Wang X, Ren Y, Liu J. Liquid Metal Enabled Electrobiology: A New Frontier to Tackle Disease Challenges. MICROMACHINES 2018; 9:E360. [PMID: 30424293 PMCID: PMC6082282 DOI: 10.3390/mi9070360] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 07/09/2018] [Accepted: 07/18/2018] [Indexed: 01/06/2023]
Abstract
In this article, a new conceptual biomedical engineering strategy to tackle modern disease challenges, called liquid metal (LM) enabled electrobiology, is proposed. This generalized and simple method is based on the physiological fact that specially administrated electricity induces a series of subsequent desired biological effects, either shortly, transitionally, or permanently. Due to high compliance within biological tissues, LM would help mold a pervasive method for treating physiological or psychological diseases. As highly conductive and non-toxic multifunctional flexible materials, such LMs can generate any requested electric treating fields (ETFields), which can adapt to various sites inside the human body. The basic mechanisms of electrobiology in delivering electricity to the target tissues and then inducing expected outputs for disease treatment are interpreted. The methods for realizing soft and conformable electronics based on LM are illustrated. Furthermore, a group of typical disease challenges are observed to illustrate the basic strategies for performing LM electrobiology therapy, which include but are not limited to: tissue electronics, brain disorder, immunotherapy, neural functional recovery, muscle stimulation, skin rejuvenation, cosmetology and dieting, artificial organs, cardiac pacing, cancer therapy, etc. Some practical issues regarding electrobiology for future disease therapy are discussed. Perspectives in this direction for incubating a simple biomedical tool for health care are pointed out.
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Affiliation(s)
- Xuelin Wang
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, China.
| | - Yi Ren
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, China.
| | - Jing Liu
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, China.
- Beijing Key Lab of CryoBiomedical Engineering and Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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