1
|
Gong L, Taguchi A, Zhou W, Mitsuya R, Ohta H, Katayama T. Ferroelectric BaTiO 3 Freestanding Sheets for an Ultra-High-Speed Light-Driven Actuator. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 39327981 DOI: 10.1021/acsami.4c10044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/28/2024]
Abstract
Light-driven actuators convert optical energy into physical motion. Organic materials, commonly used in light-driven actuators thus far, suffer from two limitations: slow repetitive operation and the requirement of two different light sources. Herein, we report a high-speed, light-driven actuator that can be operated by a single light source with low-energy density. We achieved this breakthrough by utilizing a freestanding epitaxial sheet of ferroelectric BaTiO3. One repetitive operation takes only 120 μs, which is 104 times faster than that of organic-based counterparts. The high-speed operation is derived from the light-induced nonthermal deformation provided by the excellent ferroelectricity (remnant polarization of 23 μC/cm2) and piezoelectricity (d33 of 600 pm/V) of the sheet. The displacement-to-length ratio is achieved to be 3.7% with a relatively low laser power density (10-200 mW/cm2) compared to previously reports (150-109 mW/cm2). Furthermore, the actuator was operable even in water, demonstrating its potential in various applications.
Collapse
Affiliation(s)
- Lizhikun Gong
- Graduate School of Information Science and Technology, Hokkaido University, N14W9, Kita, Sapporo 060-0814, Japan
| | - Atsushi Taguchi
- Research Institute for Electronic Science, Hokkaido University, N20W10, Kita, Sapporo 001-0020, Japan
| | - Weikun Zhou
- Graduate School of Information Science and Technology, Hokkaido University, N14W9, Kita, Sapporo 060-0814, Japan
| | - Ren Mitsuya
- Graduate School of Information Science and Technology, Hokkaido University, N14W9, Kita, Sapporo 060-0814, Japan
| | - Hiromichi Ohta
- Research Institute for Electronic Science, Hokkaido University, N20W10, Kita, Sapporo 001-0020, Japan
| | - Tsukasa Katayama
- Research Institute for Electronic Science, Hokkaido University, N20W10, Kita, Sapporo 001-0020, Japan
- JST-PRESTO, Kawaguchi 332-0012, Saitama, Japan
| |
Collapse
|
2
|
Yang R, Li J, Cai Y, Blankenship BW, Wu J, Grigoropoulos CP. Near-Field Nanoimaging of Phases and Carrier Dynamics in Vanadium Dioxide Nanobeams. ACS PHOTONICS 2024; 11:3359-3364. [PMID: 39184182 PMCID: PMC11342413 DOI: 10.1021/acsphotonics.4c00848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 07/09/2024] [Accepted: 07/10/2024] [Indexed: 08/27/2024]
Abstract
The stable coexistence of insulating and metallic phases in strained vanadium dioxide (VO2) has garnered significant research interest due to the intriguing phase transition phenomena. However, the temporal behavior of charge carriers in different phases of VO2 remains elusive. Herein, we employ near-field optical nanoscopy to capture nanoscale alternating phase domains in bent VO2 nanobeams. By conducting transient measurements across the different phases, we observed a prolonged carrier recombination lifetime in the metallic phase of VO2, accompanied by an accelerated diffusion process. Our findings reveal nanoscale carrier dynamics in VO2 nanobeams, offering insights that can facilitate further investigations into phase-change materials and their potential applications in sensing and microelectromechanical devices.
Collapse
Affiliation(s)
- Rundi Yang
- Laser
Thermal Laboratory, Department of Mechanical Engineering, University of California, Berkeley, California 94720, United States
| | - Jingang Li
- Laser
Thermal Laboratory, Department of Mechanical Engineering, University of California, Berkeley, California 94720, United States
| | - Yuhang Cai
- Department
of Materials Science and Engineering, University
of California, Berkeley, California 94720, United States
| | - Brian W. Blankenship
- Laser
Thermal Laboratory, Department of Mechanical Engineering, University of California, Berkeley, California 94720, United States
| | - Junqiao Wu
- Department
of Materials Science and Engineering, University
of California, Berkeley, California 94720, United States
| | - Costas P. Grigoropoulos
- Laser
Thermal Laboratory, Department of Mechanical Engineering, University of California, Berkeley, California 94720, United States
| |
Collapse
|
3
|
Wang Y, Li X, Lu J, Li Y, Yan X, Dou S, Wang L. Measurement of Mechanical Properties of VO 2 Films by Nanoindentation. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1042. [PMID: 36985936 PMCID: PMC10056105 DOI: 10.3390/nano13061042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/28/2023] [Accepted: 03/09/2023] [Indexed: 06/18/2023]
Abstract
The present work reported the intrinsic mechanical behavior of vanadium dioxide (VO2) thin film deposited on a SiO2 substrate using a combination of nanoindentation tests and a theoretical model. The effect of phase transition on mechanical parameters was studied by adjusting the test temperature. A new model that can simultaneously extract the elastic modulus and hardness was derived by introducing a dimensional analysis. The results showed that the thin film exhibits a hardness of 9.43 GPa and a Young's modulus of about 138.5 GPa at room temperature, compared with the values of 5.71 GPa and 126.9 GPa at a high temperature, respectively. It can be seen that the intrinsic mechanical parameters decrease to a certain extent after a phase transition. Finally, the numerical simulation results were consistent with those of the experiments, which verified the effectiveness of the new method. In addition, this study also provided useful guidance for mechanical tests on other ultra-thin films.
Collapse
Affiliation(s)
- Yuemin Wang
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Xingang Li
- Jiangxi Construction Engineering (Group) Corporation Limited, Nanchang 330029, China
| | - Jiarui Lu
- School of Engineering, Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Yao Li
- Center for Composite Materials and Structure, Science and Technology on Advanced Composites in Special Environment Laboratory, Harbin Institute of Technology, Harbin 150080, China
| | - Xiangqiao Yan
- Center for Composite Materials and Structure, Science and Technology on Advanced Composites in Special Environment Laboratory, Harbin Institute of Technology, Harbin 150080, China
| | - Shuliang Dou
- Center for Composite Materials and Structure, Science and Technology on Advanced Composites in Special Environment Laboratory, Harbin Institute of Technology, Harbin 150080, China
| | - Lei Wang
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
| |
Collapse
|
4
|
Shi R, Wu Y, Xin Z, Guo J, Li Z, Zhao B, Peng R, Li C, Wang E, Wang B, Zhang X, Cheng C, Liu K. Liquid Precursor-Guided Phase Engineering of Single-Crystal VO 2 Beams. Angew Chem Int Ed Engl 2023; 62:e202301421. [PMID: 36808416 DOI: 10.1002/anie.202301421] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 02/20/2023] [Accepted: 02/20/2023] [Indexed: 02/23/2023]
Abstract
The study of VO2 flourishes due to its rich competing phases induced by slight stoichiometry variations. However, the vague mechanism of stoichiometry manipulation makes the precise phase engineering of VO2 still challenging. Here, stoichiometry manipulation of single-crystal VO2 beams in liquid-assisted growth is systematically studied. Contrary to previous experience, oxygen-rich VO2 phases are abnormally synthesized under a reduced oxygen concentration, revealing the important function of liquid V2 O5 precursor: It submerges VO2 crystals and stabilizes their stoichiometric phase (M1) by isolating them from the reactive atmosphere, while the uncovered crystals are oxidized by the growth atmosphere. By varying the thickness of liquid V2 O5 precursor and thus the exposure time of VO2 to the atmosphere, various VO2 phases (M1, T, and M2) can be selectively stabilized. Furthermore, this liquid precursor-guided growth can be used to spatially manages multiphase structures in single VO2 beams, enriching their deformation modes for actuation applications.
Collapse
Affiliation(s)
- Run Shi
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Yonghuang Wu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Zeqin Xin
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Jing Guo
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Zonglin Li
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Bochen Zhao
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Ruixuan Peng
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Chenyu Li
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Enze Wang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Bolun Wang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Xiaolong Zhang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Chun Cheng
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Kai Liu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| |
Collapse
|
5
|
Mutilin SV, Yakovkina LV, Seleznev VA, Prinz VY. Kinetics of Catalyst-Free and Position-Controlled Low-Pressure Chemical Vapor Deposition Growth of VO 2 Nanowire Arrays on Nanoimprinted Si Substrates. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15217863. [PMID: 36363453 PMCID: PMC9656171 DOI: 10.3390/ma15217863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 10/30/2022] [Accepted: 11/06/2022] [Indexed: 05/27/2023]
Abstract
In the present article, the position-controlled and catalytic-free synthesis of vanadium dioxide (VO2) nanowires (NWs) grown by the chemical vapor deposition (CVD) on nanoimprinted silicon substrates in the form of nanopillar arrays was analyzed. The NW growth on silicon nanopillars with different cross-sectional areas was studied, and it has been shown that the NWs' height decreases with an increase in their cross-sectional area. The X-ray diffraction technique, scanning electron microscopy, and X-ray photoelectron spectroscopy showed the high quality of the grown VO2 NWs. A qualitative description of the growth rate of vertical NWs based on the material balance equation is given. The dependence of the growth rate of vertical and horizontal NWs on the precursor concentration in the gas phase and on the growth time was investigated. It was found that the height of vertical VO2 NWs along the [100] direction exhibited a linear dependence on time and increased with an increase in the precursor concentration. For horizontal VO2 NWs, the height along the direction [011] varied little with the growth time and precursor concentration. These results suggest that the high-aspect ratio vertical VO2 NWs formed due to different growth modes of their crystal faces forming the top of the growing VO2 crystals and their lateral crystal faces related to the difference between the free energies of these crystal faces and implemented experimental conditions. The results obtained permit a better insight into the growth of high-aspect ratio VO2 NWs and into the formation of large VO2 NW arrays with a controlled composition and properties.
Collapse
Affiliation(s)
- Sergey V. Mutilin
- Rzhanov Institute of Semiconductor Physics SB RAS, 13 Lavrentiev Aven., 630090 Novosibirsk, Russia
| | - Lyubov V. Yakovkina
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Lavrentiev Aven., 630090 Novosibirsk, Russia
| | - Vladimir A. Seleznev
- Rzhanov Institute of Semiconductor Physics SB RAS, 13 Lavrentiev Aven., 630090 Novosibirsk, Russia
| | - Victor Ya. Prinz
- Rzhanov Institute of Semiconductor Physics SB RAS, 13 Lavrentiev Aven., 630090 Novosibirsk, Russia
| |
Collapse
|
6
|
Shi R, Chen Y, Cai X, Lian Q, Zhang Z, Shen N, Amini A, Wang N, Cheng C. Phase management in single-crystalline vanadium dioxide beams. Nat Commun 2021; 12:4214. [PMID: 34244501 PMCID: PMC8270972 DOI: 10.1038/s41467-021-24527-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 06/24/2021] [Indexed: 11/10/2022] Open
Abstract
A systematic study of various metal-insulator transition (MIT) associated phases of VO2, including metallic R phase and insulating phases (T, M1, M2), is required to uncover the physics of MIT and trigger their promising applications. Here, through an oxide inhibitor-assisted stoichiometry engineering, we show that all the insulating phases can be selectively stabilized in single-crystalline VO2 beams at room temperature. The stoichiometry engineering strategy also provides precise spatial control of the phase configurations in as-grown VO2 beams at the submicron-scale, introducing a fresh concept of phase transition route devices. For instance, the combination of different phase transition routes at the two sides of VO2 beams gives birth to a family of single-crystalline VO2 actuators with highly improved performance and functional diversity. This work provides a substantial understanding of the stoichiometry-temperature phase diagram and a stoichiometry engineering strategy for the effective phase management of VO2. Control of the phases associated with the metal-insulator transition in VO2 underpins its applications as a phase change material. Here, the authors report phase management by means of oxide inhibitor-assisted growth and present high-performance VO2 actuators based on asymmetric phase transition routes.
Collapse
Affiliation(s)
- Run Shi
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, People's Republic of China.,Department of Physics and Center for Quantum Materials, Hong Kong University of Science and Technology, Hong Kong, People's Republic of China
| | - Yong Chen
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, People's Republic of China.,Department of Physics and Center for Quantum Materials, Hong Kong University of Science and Technology, Hong Kong, People's Republic of China
| | - Xiangbin Cai
- Department of Physics and Center for Quantum Materials, Hong Kong University of Science and Technology, Hong Kong, People's Republic of China
| | - Qing Lian
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, People's Republic of China
| | - Zhuoqiong Zhang
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, People's Republic of China
| | - Nan Shen
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, People's Republic of China
| | - Abbas Amini
- Center for Infrastructure Engineering, Western Sydney University, Kingswood, NSW, Australia
| | - Ning Wang
- Department of Physics and Center for Quantum Materials, Hong Kong University of Science and Technology, Hong Kong, People's Republic of China
| | - Chun Cheng
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, People's Republic of China.
| |
Collapse
|
7
|
Chen Y, Yang J, Zhang X, Feng Y, Zeng H, Wang L, Feng W. Light-driven bimorph soft actuators: design, fabrication, and properties. MATERIALS HORIZONS 2021; 8:728-757. [PMID: 34821314 DOI: 10.1039/d0mh01406k] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Soft robots that can move like living organisms and adapt to their surroundings are currently in the limelight from fundamental studies to technological applications, due to their advances in material flexibility, human-friendly interaction, and biological adaptation that surpass conventional rigid machines. Light-fueled smart actuators based on responsive soft materials are considered to be one of the most promising candidates to promote the field of untethered soft robotics, thereby attracting considerable attention amongst materials scientists and microroboticists to investigate photomechanics, photoswitch, bioinspired design, and actuation realization. In this review, we discuss the recent state-of-the-art advances in light-driven bimorph soft actuators, with the focus on bilayer strategy, i.e., integration between photoactive and passive layers within a single material system. Bilayer structures can endow soft actuators with unprecedented features such as ultrasensitivity, programmability, superior compatibility, robustness, and sophistication in controllability. We begin with an explanation about the working principle of bimorph soft actuators and introduction of a synthesis pathway toward light-responsive materials for soft robotics. Then, photothermal and photochemical bimorph soft actuators are sequentially introduced, with an emphasis on the design strategy, actuation performance, underlying mechanism, and emerging applications. Finally, this review is concluded with a perspective on the existing challenges and future opportunities in this nascent research Frontier.
Collapse
Affiliation(s)
- Yuanhao Chen
- School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P. R. China.
| | | | | | | | | | | | | |
Collapse
|
8
|
Rashid MA, Mondal BK, Rubel MHK, Rahman MM, Mefford OT, Hossain J. Synthesis of Self-Assembled Randomly Oriented VO 2 Nanowires on a Glass Substrate by a Spin Coating Method. Inorg Chem 2020; 59:15707-15716. [PMID: 33078925 DOI: 10.1021/acs.inorgchem.0c02108] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Randomly oriented vanadium dioxide (VO2) nanowires were produced on a glass substrate by spin coating from a cosolvent. SEM studies reveal that highly dense VO2 nanowires were grown at an annealing temperature of 400 °C. X-ray diffraction (XRD) provides evidence of the high crystallinity of the VO2 nanowires-embedded VO2 thin films on the glass substrate at 400 °C. Characterization by high-resolution transmission electron microscopy (HR-TEM) confirmed the formation of VO2 nanowires. The optical band gap of the nanowires-embedded VO2 thin films was also calculated from the transmittance data to be 2.65-2.70 eV. The growth mechanism of the solution-processed semiconducting VO2 nanowires was proposed based on both solvent selection and annealing temperature. Finally, the solar water splitting ability of the VO2 nanowires-embedded VO2 thin films was demonstrated in a photoelectrochemical cell (PEC).
Collapse
Affiliation(s)
- Md Abdur Rashid
- Solar Energy Laboratory, Department of Electrical and Electronic Engineering, University of Rajshahi, Rajshahi 6205, Bangladesh.,Department of Physics, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Bipanko Kumar Mondal
- Solar Energy Laboratory, Department of Electrical and Electronic Engineering, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Mirza H K Rubel
- Department of Materials Science and Engineering, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Md Mahbubor Rahman
- Department of Chemistry, University of Rajshahi, Rajshahi 6205, Bangladesh.,Department of Materials Science & Engineering, Clemson University, Clemson, South Carolina 29634-0971, United States
| | - Olin Thompson Mefford
- Department of Materials Science & Engineering, Clemson University, Clemson, South Carolina 29634-0971, United States
| | - Jaker Hossain
- Solar Energy Laboratory, Department of Electrical and Electronic Engineering, University of Rajshahi, Rajshahi 6205, Bangladesh
| |
Collapse
|
9
|
Ke Y, Wang S, Liu G, Li M, White TJ, Long Y. Vanadium Dioxide: The Multistimuli Responsive Material and Its Applications. SMALL 2018; 14:e1802025. [PMID: 30085392 DOI: 10.1002/smll.201802025] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Revised: 06/24/2018] [Indexed: 05/12/2023]
Affiliation(s)
- Yujie Ke
- School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| | - Shancheng Wang
- School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| | - Guowei Liu
- School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| | - Ming Li
- School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
- Key Laboratory of Materials Physics; Anhui Key Laboratory of Nanomaterials and Nanotechnology; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 P. R. China
| | - Timothy J. White
- School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| | - Yi Long
- School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
- Singapore-HUJ Alliance for Research and Enterprise (SHARE); Nanomaterials for Energy and Energy-Water Nexus (NEW); Campus for Research Excellence and Technological Enterprise (CREATE); 1 Create Way Singapore 138602 Singapore
| |
Collapse
|
10
|
Ma H, Zhang X, Cui R, Liu F, Wang M, Huang C, Hou J, Wang G, Wei Y, Jiang K, Pan L, Liu K. Photo-driven nanoactuators based on carbon nanocoils and vanadium dioxide bimorphs. NANOSCALE 2018; 10:11158-11164. [PMID: 29873375 DOI: 10.1039/c8nr03622e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Photo-driven actuators are highly desirable in various smart systems owing to the advantages of wireless control and possible actuation by solar energy. Miniaturization of photo-driven actuators is particularly essential in micro-robotics and micro-/nano-electro-mechanical systems. However, it remains a great challenge to build up nano-scale photo-driven actuators with competitive performance in amplitude, response speed, and lifetime. In this work, we developed photo-driven nanoactuators based on bimorph structures of vanadium dioxides (VO2) and carbon nanocoils (CNCs). Activated by the huge structural phase transition of VO2, the photo-driven VO2/CNC nanoactuators deliver a giant amplitude, a fast response up to 9400 Hz, and a long lifetime more than 10 000 000 actuation cycles. Both experimental and simulation results show that the helical structure of CNCs enables a low photo-driven threshold of VO2/CNC nanoactuators, which provides an effective method to construct photo-driven nanoactuators with low power consumption. Our photo-driven VO2/CNC nanoactuators would find potential applications in nano-scale electrical/optical switches and other smart devices.
Collapse
Affiliation(s)
- He Ma
- College of Applied Sciences, Beijing University of Technology, Beijing 100124, P. R. China.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Tian Z, Xu B, Hsu B, Stan L, Yang Z, Mei Y. Reconfigurable Vanadium Dioxide Nanomembranes and Microtubes with Controllable Phase Transition Temperatures. NANO LETTERS 2018; 18:3017-3023. [PMID: 29633849 DOI: 10.1021/acs.nanolett.8b00483] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Two additional structural forms, free-standing nanomembranes and microtubes, are reported and added to the vanadium dioxide (VO2) material family. Free-standing VO2 nanomembranes were fabricated by precisely thinning as-grown VO2 thin films and etching away the sacrificial layer underneath. VO2 microtubes with a range of controllable diameters were rolled-up from the VO2 nanomembranes. When a VO2 nanomembrane is rolled-up into a microtubular structure, a significant compressive strain is generated and accommodated therein, which decreases the phase transition temperature of the VO2 material. The magnitude of the compressive strain is determined by the curvature of the VO2 microtube, which can be rationally and accurately designed by controlling the tube diameter during the rolling-up fabrication process. The VO2 microtube rolling-up process presents a novel way to controllably tune the phase transition temperature of VO2 materials over a wide range toward practical applications. Furthermore, the rolling-up process is reversible. A VO2 microtube can be transformed back into a nanomembrane by introducing an external strain. Because of its tunable phase transition temperature and reversible shape transformation, the VO2 nanomembrane-microtube structure is promising for device applications. As an example application, a tubular microactuator device with low driving energy but large displacement is demonstrated at various triggering temperatures.
Collapse
Affiliation(s)
- Ziao Tian
- Department of Materials Science, State Key Laboratory of ASIC and Systems , Fudan University , 200433 Shanghai , PR China
| | - Borui Xu
- Department of Materials Science, State Key Laboratory of ASIC and Systems , Fudan University , 200433 Shanghai , PR China
| | - Bo Hsu
- Department of Electrical and Computer Engineering , University of Illinois at Chicago , Chicago , Illinois 60607 , United States
| | - Liliana Stan
- Center for Nanoscale Materials , Argonne National Laboratory , Lemont , Illinois 60439 , United States
| | - Zheng Yang
- Department of Electrical and Computer Engineering , University of Illinois at Chicago , Chicago , Illinois 60607 , United States
| | - YongFeng Mei
- Department of Materials Science, State Key Laboratory of ASIC and Systems , Fudan University , 200433 Shanghai , PR China
| |
Collapse
|
12
|
Manca N, Pellegrino L, Kanki T, Venstra WJ, Mattoni G, Higuchi Y, Tanaka H, Caviglia AD, Marré D. Selective High-Frequency Mechanical Actuation Driven by the VO 2 Electronic Instability. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1701618. [PMID: 28714094 DOI: 10.1002/adma.201701618] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 05/12/2017] [Indexed: 06/07/2023]
Abstract
Relaxation oscillators consist of periodic variations of a physical quantity triggered by a static excitation. They are a typical consequence of nonlinear dynamics and can be observed in a variety of systems. VO2 is a correlated oxide with a solid-state phase transition above room temperature, where both electrical resistance and lattice parameters undergo a drastic change in a narrow temperature range. This strong nonlinear response allows to realize spontaneous electrical oscillations in the megahertz range under a DC voltage bias. These electrical oscillations are employed to set into mechanical resonance a microstructure without the need of any active electronics, with small power consumption and with the possibility to selectively excite specific flexural modes by tuning the value of the DC electrical bias in a range of few hundreds of millivolts. This actuation method is robust and flexible and can be implemented in a variety of autonomous DC-powered devices.
Collapse
Affiliation(s)
- Nicola Manca
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | | | - Teruo Kanki
- Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047, Japan
| | - Warner J Venstra
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
- Quantified Air, Lorentzweg 1, Delft, 2628 CJ, The Netherlands
| | - Giordano Mattoni
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Yoshiyuki Higuchi
- Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047, Japan
| | - Hidekazu Tanaka
- Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047, Japan
| | - Andrea D Caviglia
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Daniele Marré
- CNR-SPIN, Corso Perrone 24, 16152, Genova, Italy
- Physics Department, University of Genova, Via Dodecaneso 33, 16146, Genova, Italy
| |
Collapse
|
13
|
Ma H, Hou J, Wang X, Zhang J, Yuan Z, Xiao L, Wei Y, Fan S, Jiang K, Liu K. Flexible, All-Inorganic Actuators Based on Vanadium Dioxide and Carbon Nanotube Bimorphs. NANO LETTERS 2017; 17:421-428. [PMID: 28002675 DOI: 10.1021/acs.nanolett.6b04393] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Flexible actuators responsive to multiple stimuli are much desired in wearable electronics. However, general designs containing organic materials are usually subject to slow response and limited lifetime, or high triggering threshold. In this study, we develop flexible, all-inorganic actuators based on bimorph structures composed of vanadium dioxide (VO2) and carbon nanotube (CNT) thin films. The drastic, reversible phase transition of VO2 drives the actuators to deliver giant amplitude, fast response up to ∼100 Hz, and long lifetime more than 1 000 000 actuation cycles. The excellent electrical conductivity and light absorption of CNT thin films enable the actuators to be highly responsive to multiple stimuli including light, electric, and heat. The power consumption of the actuators can be much reduced by doping VO2 to lower its phase transition temperature. These flexible bimorph actuators find applications in biomimetic inspect wings, millimeter-scale fingers, and physiological-temperature driven switches.
Collapse
Affiliation(s)
| | | | | | | | | | - Lin Xiao
- Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology , Beijing 100094, China
| | | | | | | | | |
Collapse
|
14
|
Hu Y, Li Z, Lan T, Chen W. Photoactuators for Direct Optical-to-Mechanical Energy Conversion: From Nanocomponent Assembly to Macroscopic Deformation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:10548-10556. [PMID: 27604650 DOI: 10.1002/adma.201602685] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 06/28/2016] [Indexed: 05/24/2023]
Abstract
Photoactuators with integrated optical-to-mechanical energy conversion capacity have attracted growing research interest in the last few decades due to their unique features of remote control and their wide applications ranging from bionic robots, biomedical devices, and switches to motors. For the photoactuator design, the energy conversion route and structure assembly are two important parts, which directly affect the performance of the photoactuators. In particular, the architectural designs at the molecular, nano-, micro-, and macro- level, are found to play a significant role in accumulating molecular-scale strain/stress to macroscale strain/stress. Here, recent progress on photoactuators based on photochemical and photothermal effects is summarized, followed by a discussion of the important assembly strategies for the amplification of the photoresponsive components at nanoscale to macroscopic scale motions. The application advancement of current photoactuators is also presented.
Collapse
Affiliation(s)
- Ying Hu
- i-Lab, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - Zhe Li
- i-Lab, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - Tian Lan
- i-Lab, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - Wei Chen
- i-Lab, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| |
Collapse
|
15
|
Boudot M, Elettro H, Grosso D. Converting Water Adsorption and Capillary Condensation in Usable Forces with Simple Porous Inorganic Thin Films. ACS NANO 2016; 10:10031-10040. [PMID: 27792305 DOI: 10.1021/acsnano.6b04648] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This work reports an innovative humidity-driven actuation concept based on conversion of chemical energy of adsorption/desorption using simple nanoporous sol-gel silica thin films as humidity-responsive materials. Bilayer-shaped actuators, consisting of a humidity-sensitive active nanostructured silica film deposited on a polymeric substrate (Kapton), were demonstrated as an original mean to convert water molecule adsorption and capillary condensation in usable mechanical work. Reversible solvation stress changes in silica micropores by water adsorption and energy produced by the rigid silica film contraction, induced by water capillary condensation in mesopores, were finely controlled and used as energy sources. The influence of the film nanostructure (microporosity, mesoporosity) and thickness and the polymeric substrate thickness on actuation force, on movement speed and on displacement amplitude are clearly evidenced and discussed. We show that the global mechanical response of such silica-based actuators can easily be adjusted to fabricate tailor-made actuation systems triggered by humidity variation. This study provides insight into hard ceramic stimulus-responsive materials that seem to be a promising alternative to traditional soft organic materials for surface-chemistry-driven actuation systems.
Collapse
Affiliation(s)
| | | | - David Grosso
- NSE-IM2NP-UMR CNRS 7334, Faculté des Sciences de Saint Jérôme, Aix-Marseille Université , Case 142, 13397 Cedex 20 Marseille, France
| |
Collapse
|
16
|
Hou J, Wang X, Fu D, Ko C, Chen Y, Sun Y, Lee S, Wang KX, Dong K, Sun Y, Tongay S, Jiao L, Yao J, Liu K, Wu J. Modulating Photoluminescence of Monolayer Molybdenum Disulfide by Metal-Insulator Phase Transition in Active Substrates. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:3976-3984. [PMID: 27335137 DOI: 10.1002/smll.201601021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 05/11/2016] [Indexed: 06/06/2023]
Abstract
The atomic thickness and flatness allow properties of 2D semiconductors to be modulated with influence from the substrate. Reversible modulation of these properties requires an "active," reconfigurable substrate, i.e., a substrate with switchable functionalities that interacts strongly with the 2D overlayer. In this work, the photoluminescence (PL) of monolayer molybdenum disulfide (MoS2 ) is modulated by interfacing it with a phase transition material, vanadium dioxide (VO2 ). The MoS2 PL intensity is enhanced by a factor of up to three when the underlying VO2 undergoes the thermally driven phase transition from the insulating to metallic phase. A nonvolatile, reversible way to rewrite the PL pattern is also demonstrated. The enhancement effect is attributed to constructive optical interference when the VO2 turns metallic. This modulation method requires no chemical or mechanical processes, potentially finding applications in new switches and sensors.
Collapse
Affiliation(s)
- Jiwei Hou
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Xi Wang
- Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
| | - Deyi Fu
- Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
| | - Changhyun Ko
- Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
| | - Yabin Chen
- Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
| | - Yufei Sun
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Sangwook Lee
- School of Materials Science and Engineering, Kyungpook National University, Daegu, 41566, Korea
| | - Kevin X Wang
- Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
| | - Kaichen Dong
- Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
- Department of Precision Instrument, Tsinghua University, Beijing, 100084, P. R. China
| | - Yinghui Sun
- Department of Physics, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, P. R. China
| | - Sefaattin Tongay
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85287, USA
| | - Liying Jiao
- Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Jie Yao
- Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Kai Liu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Junqiao Wu
- Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| |
Collapse
|
17
|
Strelcov E, Ievlev A, Belianinov A, Tselev A, Kolmakov A, Kalinin SV. Local coexistence of VO2 phases revealed by deep data analysis. Sci Rep 2016; 6:29216. [PMID: 27384473 PMCID: PMC4935893 DOI: 10.1038/srep29216] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 06/13/2016] [Indexed: 11/25/2022] Open
Abstract
We report a synergistic approach of micro-Raman spectroscopic mapping and deep data analysis to study the distribution of crystallographic phases and ferroelastic domains in a defected Al-doped VO2 microcrystal. Bayesian linear unmixing revealed an uneven distribution of the T phase, which is stabilized by the surface defects and uneven local doping that went undetectable by other classical analysis techniques such as PCA and SIMPLISMA. This work demonstrates the impact of information recovery via statistical analysis and full mapping in spectroscopic studies of vanadium dioxide systems, which is commonly substituted by averaging or single point-probing approaches, both of which suffer from information misinterpretation due to low resolving power.
Collapse
Affiliation(s)
- Evgheni Strelcov
- Institute for Functional Imaging of Materials and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.,Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.,Maryland Nanocenter, University of Maryland, College Park, MD 20742, USA
| | - Anton Ievlev
- Institute for Functional Imaging of Materials and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Alex Belianinov
- Institute for Functional Imaging of Materials and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Alexander Tselev
- Institute for Functional Imaging of Materials and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Andrei Kolmakov
- Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - Sergei V Kalinin
- Institute for Functional Imaging of Materials and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| |
Collapse
|
18
|
Dong B, Shen N, Cao C, Chen Z, Luo H, Gao Y. An abnormal phase transition behavior in VO2 nanoparticles induced by an M1–M2–R process: two anomalous high (>68 °C) transition temperatures. RSC Adv 2016. [DOI: 10.1039/c6ra07009d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Abnormal phase transition of VO2 nanoparticles was observed after high-temperature thermal treatment. A single phase transition temperature at 65.1 °C for the pristine VO2 nanoparticles split into two temperatures of approximately 74 °C and 84 °C.
Collapse
Affiliation(s)
- Bingrong Dong
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- China
| | - Nan Shen
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- China
| | - Chuanxiang Cao
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- China
| | - Zhang Chen
- School of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
- China
| | - Hongjie Luo
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- China
| | - Yanfeng Gao
- School of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
- China
- Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province
| |
Collapse
|
19
|
Wang X, Gao H. Distinguishing the Photothermal and Photoinjection Effects in Vanadium Dioxide Nanowires. NANO LETTERS 2015; 15:7037-7042. [PMID: 26422776 DOI: 10.1021/acs.nanolett.5b03086] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Vanadium dioxide (VO2) has drawn significant attention for its unique metal-to-insulator transition near the room temperature. The high electrical resistivity below the transition temperature (∼68 °C) is a result of the strong electron correlation with the assistance of lattice (Peierls) distortion. Theoretical calculations indicated that the strong interelectron interactions might induce intriguing optoelectronic phenomena, such as the multiple exciton generation (MEG), a process desirable for efficient optoelectronics and photovoltaics. However, the resistivity of VO2 is quite temperature sensitive, and therefore, the light-induced conductivity in VO2 has often been attributed to the photothermal effects. In this work, we distinguished the photothermal and photoinjection effects in VO2 nanowires by varying the chopping frequency of the optical illumination. We found that, in our VO2 nanowires, the relatively slow photothermal processes can be well suppressed when the chopping frequency is >2 kHz, whereas the fast photoinjection component (direct photoexcitation of charge carriers) remains constant at all chopping frequencies. By separating the photothermal and photoinjection processes, our work set the basis for further studies of carrier dynamics under optical excitations in strongly correlated materials.
Collapse
Affiliation(s)
- Xi Wang
- Department of Physics and ‡Materials Science Program, Florida State University , Tallahassee, Florida 32306, United States
| | - Hanwei Gao
- Department of Physics and ‡Materials Science Program, Florida State University , Tallahassee, Florida 32306, United States
- National High Magnetic Field Laboratory, Florida State University , Tallahassee, Florida 32310, United States
| |
Collapse
|
20
|
Hu Y, Lan T, Wu G, Zhu Z, Chen W. A spongy graphene based bimorph actuator with ultra-large displacement towards biomimetic application. NANOSCALE 2014; 6:12703-12709. [PMID: 25220910 DOI: 10.1039/c4nr02768j] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Bimorph actuators, consisting of two layers with asymmetric expansion and generating bending displacement, have been widely researched. Their actuation performances greatly rely on the difference of coefficients of thermal expansion (CTE) between the two material layers. Here, by introducing a spongy graphene (sG) paper with a large negative CTE as well as high electrical-to-thermal properties, an electromechanical sG/PDMS bimorph actuator is designed and fabricated, showing an ultra-large bending displacement output under low voltage stimulation (curvature of about 1.2 cm(-1) at 10 V for 3 s), a high displacement-to-length ratio (∼0.79), and vibration motion at AC voltage (up to 10 Hz), which is much larger and faster than that of the other electromechanical bimorph actuators. Based on the sG/PDMS bimorph serving as the "finger", a mechanical gripper is constructed to realize the fast manipulation of the objects under 0.1 Hz square wave voltage stimulation (0-8 V). The designed bimorph actuator coupled with ultra-large bending displacement, low driven voltage, and the ease of fabrication may open up substantial possibilities for the utilization of electromechanical actuators in practical biomimetic device applications.
Collapse
Affiliation(s)
- Ying Hu
- i-Lab, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China.
| | | | | | | | | |
Collapse
|
21
|
Cheng C, Guo H, Amini A, Liu K, Fu D, Zou J, Song H. Self-assembly and horizontal orientation growth of VO2 nanowires. Sci Rep 2014; 4:5456. [PMID: 24965899 PMCID: PMC4071308 DOI: 10.1038/srep05456] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 06/09/2014] [Indexed: 11/09/2022] Open
Abstract
Single-crystalline vanadium dioxide (VO2) nanostructures have attracted an intense research interest recently because of their unique single-domain metal-insulator phase transition property. Synthesis of these nanostructures in the past was limited in density, alignment, or single-crystallinity. The assembly of VO2 nanowires (NWs) is desirable for a “bottom-up” approach to the engineering of intricate structures using nanoscale building blocks. Here, we report the successful synthesis of horizontally aligned VO2 NWs with a dense growth mode in the [1-100]quartz direction of a polished x-cut quartz surface using a simple vapor transport method. Our strategy of controlled growth of VO2 NWs promisingly paves the way for designing novel metal-insulator transition devices based on VO2 NWs.
Collapse
Affiliation(s)
- Chun Cheng
- Department of Materials Science and Engineering, South University of Science and Technology, Shenzhen 518055, China
| | - Hua Guo
- National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Abbas Amini
- School of Computing, Engineering and Mathematics, University of Western Sydney, Kingswood, NSW 2751, Australia
| | - Kai Liu
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA
| | - Deyi Fu
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA
| | - Jian Zou
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA
| | - Haisheng Song
- Wuhan National Laboratory for Optoelectronics (WNLO) and the School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
| |
Collapse
|
22
|
Liu K, Cheng C, Suh J, Tang-Kong R, Fu D, Lee S, Zhou J, Chua LO, Wu J. Powerful, multifunctional torsional micromuscles activated by phase transition. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:1746-1750. [PMID: 24765648 DOI: 10.1002/adma.201304064] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Micro bimorph coils driven by a metalinsulator phase transition in VO2 function as powerful torsional muscles. Reversible torsional motion over one million cycles without degradation is demonstrated, with a superior rotational speed up to ca. 200,000 rpm, an amplitude of 500° per mm length, and a power density up to ca. 39 kW kg⁻¹.
Collapse
|
23
|
Lee S, Cheng C, Guo H, Hippalgaonkar K, Wang K, Suh J, Liu K, Wu J. Axially Engineered Metal–Insulator Phase Transition by Graded Doping VO2 Nanowires. J Am Chem Soc 2013; 135:4850-5. [DOI: 10.1021/ja400658u] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sangwook Lee
- Department
of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of California, Berkeley,
California 94720, United States
- National
Center for Electron Microscopy and ⊥Division of Materials Sciences, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Chun Cheng
- Department
of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of California, Berkeley,
California 94720, United States
- National
Center for Electron Microscopy and ⊥Division of Materials Sciences, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Hua Guo
- Department
of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of California, Berkeley,
California 94720, United States
- National
Center for Electron Microscopy and ⊥Division of Materials Sciences, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Kedar Hippalgaonkar
- Department
of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of California, Berkeley,
California 94720, United States
- National
Center for Electron Microscopy and ⊥Division of Materials Sciences, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Kevin Wang
- Department
of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of California, Berkeley,
California 94720, United States
- National
Center for Electron Microscopy and ⊥Division of Materials Sciences, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Joonki Suh
- Department
of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of California, Berkeley,
California 94720, United States
- National
Center for Electron Microscopy and ⊥Division of Materials Sciences, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Kai Liu
- Department
of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of California, Berkeley,
California 94720, United States
- National
Center for Electron Microscopy and ⊥Division of Materials Sciences, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Junqiao Wu
- Department
of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of California, Berkeley,
California 94720, United States
- National
Center for Electron Microscopy and ⊥Division of Materials Sciences, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| |
Collapse
|