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学者姓名：马赫
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Abstract ：
Although perovskite has great potential in optoelectronic devices, the simultaneous satisfaction of material stability and high performance is still an issue that needs to be solved. Most perovskite optoelectronic devices use quantum dot spin coating or the gas-phase growth of perovskite thin films as the photoelectric conversion layer. Due to stability limitations, these materials often experience a significant decrease in photoelectric conversion efficiency when encountering liquid reagents. The self-assembled growth of hybrid perovskite crystals determines superior lattice ordering and stability. There are three types of ionic liquids-[Emim]BF4, EMIMNTF2, and HMITFSI-that can effectively enhance the X-ray photoelectric conversion performance of hybrid perovskite crystal CH3NH3PbI3 (MAPbI(3)), and the enhancement in the photocurrent leads to an improvement in the sensitivity of X-ray detectors. We soak the perovskite crystals in an ionic liquid and perform two treatment methods: electrification and dilution with ETOH solution. It is interesting to find that MAPbI(3) perovskite single crystal materials choose the same optimized ionic liquid species in X-ray detection and photovoltaic power generation applications, and the effect is quite the opposite. Compared with untreated MAPbI(3) crystals, the average photocurrent density of Electrify-HMITFSI MAPbI(3) increased by 826.85% under X-ray excitation and the sensitivity of X-ray detectors made from these treated MAPbI(3) crystals significantly increased by 72.6%, but the intensity of the PL spectrum decreased to 90% of the untreated intensity.
Keyword ：
X-ray photoelectric conversion X-ray photoelectric conversion MAPbI(3) crystals MAPbI(3) crystals X-ray detector X-ray detector ionic liquid treated ionic liquid treated perovskite perovskite
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| GB/T 7714 | Su, Xueqiong , Wang, Ruimin , Yu, Huimin et al. Improvement of X-ray Photoelectric Conversion Performance of MAPbI3 Perovskite Crystals by Ionic Liquid Treatment [J]. | COATINGS , 2024 , 14 (5) . |
| MLA | Su, Xueqiong et al. "Improvement of X-ray Photoelectric Conversion Performance of MAPbI3 Perovskite Crystals by Ionic Liquid Treatment" . | COATINGS 14 . 5 (2024) . |
| APA | Su, Xueqiong , Wang, Ruimin , Yu, Huimin , Wang, Jin , Chen, Ruixiang , Ma, He et al. Improvement of X-ray Photoelectric Conversion Performance of MAPbI3 Perovskite Crystals by Ionic Liquid Treatment . | COATINGS , 2024 , 14 (5) . |
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Abstract ：
Bionic microrobots working in liquid environments have attracted attention in recent years, because they play an important role in the medical fields. So far, most bionic microrobots serving in liquid environments (swimming microrobots) are fabricated based on organic materials. Limited by the inherent property of organic materials, the performance and lifetime of the swimming microrobots are still deficient. Facing this challenge, inspired by sperms, swimming microrobots based on the inorganic phase transition driving material vanadium dioxide are developed. In liquid environments, the linear and rotary motion of these sperm-like micro-robots could be controlled by changing the laser modulation frequency. The highest linear speed attained is 56 mu m s-1, and the highest rotary speed attained is 14 degrees s-1. The microrobot is able to undergo more than 105 cycles in a liquid environment without degradation of its performance. Considering its high performance and controllability, the swimming microrobot is expected to be helpful in medical applications such as precision drug delivery and minimally invasive surgery. Inspired by the sperm, photo-driven microrobots serving in liquid environments are developed. The linear and rotary motion of sperm-like micro-robots could be controlled by laser frequency. The highest linear and rotary speeds attain 56 mu m s and 14 degrees s-1. The microrobot undergoes more than 105 cycles in liquid environments without performance degradation.image (c) 2024 WILEY-VCH GmbH
Keyword ：
phase transitions phase transitions microrobots microrobots photodriven photodriven vanadium dioxides vanadium dioxides
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| GB/T 7714 | Zhang, Meng , Ma, He , Li, Yuan et al. Photo-Driven Sperm-Inspired Microrobots Serving in Liquid Environments [J]. | ADVANCED INTELLIGENT SYSTEMS , 2024 . |
| MLA | Zhang, Meng et al. "Photo-Driven Sperm-Inspired Microrobots Serving in Liquid Environments" . | ADVANCED INTELLIGENT SYSTEMS (2024) . |
| APA | Zhang, Meng , Ma, He , Li, Yuan , Wu, Jianhui , Hou, Jiwei , Liu, Kai et al. Photo-Driven Sperm-Inspired Microrobots Serving in Liquid Environments . | ADVANCED INTELLIGENT SYSTEMS , 2024 . |
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Abstract ：
Optically spatial displacement and material modification hold great potential for the appealing applications in nanofabrication and reconfiguration of functional optical devices. Here, we propose and demonstrate a scheme to achieve simultaneous deformation and phase change in vanadium dioxide (VO2)/Si3N4/Au hybrid nanostructures by laser stimuli. Low triggering threshold and significant deformation characteristics of VO2, based on controllable phase transition, are demonstrated in microscale cantilevers. The plasmonic properties of the nanostructure array are further utilized to achieve a polarization-selective dynamic response. The persistence of deformation and dynamical optical modulation are further demonstrated. Such high-precision fabrication methods and non-contact reconfiguration methods are useful for future applications in dynamic optical manipulation.
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| GB/T 7714 | Zhang, Xiaochen , Li, Yuan , Dong, Weikang et al. Optically controllable deformation and phase change in VO2/Si3N4/Au hybrid nanostructures with polarization selectivity [J]. | APL PHOTONICS , 2024 , 9 (7) . |
| MLA | Zhang, Xiaochen et al. "Optically controllable deformation and phase change in VO2/Si3N4/Au hybrid nanostructures with polarization selectivity" . | APL PHOTONICS 9 . 7 (2024) . |
| APA | Zhang, Xiaochen , Li, Yuan , Dong, Weikang , Liang, Qinghua , Sun, Haozhe , Wang, Yang et al. Optically controllable deformation and phase change in VO2/Si3N4/Au hybrid nanostructures with polarization selectivity . | APL PHOTONICS , 2024 , 9 (7) . |
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Abstract ：
Microactuators that convert external stimuli such as heat, light, current, and magnetic field into mechanical motion are essential components in microelectro-mechanical systems. To date, microactuators have been fabricated mainly using conventional microfabrication technologies and inorganic thin films, but although such technologies facilitate the mass production of microdevices, they are expensive and lack flexibility when either preparing only a few devices or facing special needs. Laser-direct-writing is an effective complement to microfabrication, but is seldom used in the construction of inorganic microactuators. In this work, a laser-direct-writing technique on the freestanding vanadium dioxide (VO2) film for fabricating microactuators with arbitrary shapes is developed. The precision of the laser direct writing attained 2 mu m under ultralow pulse energy of 52 pJ. The pulse energy is two orders of magnitude lower than that needed for patterning VO2 film and other semiconductor materials on substrates. The overall performance of the resulting VO2 microactuators is comparable with that of those fabricated by conventional microfabrication technologies, but the fabricating efficiency and flexibility are increased. Such a fabrication strategy can also be used to fabricate other smart microdevices, such as strain sensors and photodetectors.
Keyword ：
laser direct writing laser direct writing microactuator microactuator phase transition phase transition vanadium dioxide vanadium dioxide
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| GB/T 7714 | Li, Yuan , Ma, He , Tang, Fawei et al. Direct Laser Writing of Multishaped VO2 Microactuators Based on Freestanding VO2 Film [J]. | ADVANCED MATERIALS TECHNOLOGIES , 2022 , 8 (1) . |
| MLA | Li, Yuan et al. "Direct Laser Writing of Multishaped VO2 Microactuators Based on Freestanding VO2 Film" . | ADVANCED MATERIALS TECHNOLOGIES 8 . 1 (2022) . |
| APA | Li, Yuan , Ma, He , Tang, Fawei , Li, Chenyu , Wang, Bolun , Song, Xiaoyan et al. Direct Laser Writing of Multishaped VO2 Microactuators Based on Freestanding VO2 Film . | ADVANCED MATERIALS TECHNOLOGIES , 2022 , 8 (1) . |
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Abstract ：
A flexible actuator, which can convert external stimuli to mechanical motion, is an essential component of every soft robot and determines its performance. As a novel two-dimensional material, MXene has been used to fabricate flexible actuators due to its excellent physical properties. Although MXene-based actuators exhibit excellent actuation performance, their bending deformation is solely due to the in-plane isotropy of the MXene film, and an MXene torsional actuator has not been reported. This study presents a flexible torsional actuator based on an MXene-carbon nanotube (CNT)-paraffin wax (PW) film. In this actuator, the MXene thin film acts as a light absorption layer with wavelength selectivity, superaligned CNT provides structural anisotropy for the composite film, and PW acts as the active layer. The chirality and helical structure of the actuator could be tuned by the orientation of the CNT film. Such an actuator delivers excellent actuation performance, including high work density (similar to 1.2 J/cm3), low triggering power (77 mW/cm2), high rotational speed (320 degrees/s), long lifetime (30,000 cycles), and wavelength selectivity. Inspired by vines, we used the torsional actuator as a spiral grabber, which lifted an object that weighs 20 times more than the actuator. The high-performance torsional actuator would be potentially used as a noncontact sensor, rotary motor, and grabbing tool in the soft robot system.
Keyword ：
torsional actuator torsional actuator paraffin wax paraffin wax soft robot soft robot MXene MXene carbon nanotube carbon nanotube
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| GB/T 7714 | Ding, Jun , Ma, He , Xiao, Xiao et al. Flexible Torsional Photoactuators Based on MXene-Carbon Nanotube-Paraffin Wax Films [J]. | ACS APPLIED MATERIALS & INTERFACES , 2022 . |
| MLA | Ding, Jun et al. "Flexible Torsional Photoactuators Based on MXene-Carbon Nanotube-Paraffin Wax Films" . | ACS APPLIED MATERIALS & INTERFACES (2022) . |
| APA | Ding, Jun , Ma, He , Xiao, Xiao , Li, Qingwei , Liu, Kai , Zhang, Xinping . Flexible Torsional Photoactuators Based on MXene-Carbon Nanotube-Paraffin Wax Films . | ACS APPLIED MATERIALS & INTERFACES , 2022 . |
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Abstract ：
With the growing demand for broadband wireless communication, high-resolution radar, security inspection, and biological analysis, terahertz (THz) technology has made significant progress in recent years. The wide applications of THz technology benefited from the rapid development of various THz functional devices. Metasurface, an essential means of manipulating THz waves, has widely been applied in multiple THz functional devices. However, it is still a great challenge to construct flexible THz metasurface devices due to the lack of flexibility of traditional semiconductor and metal materials. In this work, a two-dimensional material, MXene, is used to prepare flexible metasurfaces with frequency filtering and polarization functions. By further combining with the phase-transition-material vanadium dioxide, the VO2/MXene metasurface exhibits good performance in amplitude modulation under electrical stimulation. The modulation depth of the device reaches 86% under a lower trigger power of 11.6 mW/mm(2) and the response time is only similar to 100 ms. Such a flexible active metasurface with superior performance and high integration will be useful in THz imaging systems, THz sensing systems, etc.
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| GB/T 7714 | Li, Yuan , Ma, He , Wang, Yu et al. Electrically driven active VO2/MXene metasurface for the terahertz modulation [J]. | APPLIED PHYSICS LETTERS , 2022 , 121 (24) . |
| MLA | Li, Yuan et al. "Electrically driven active VO2/MXene metasurface for the terahertz modulation" . | APPLIED PHYSICS LETTERS 121 . 24 (2022) . |
| APA | Li, Yuan , Ma, He , Wang, Yu , Ding, Jun , Qi, Limei , Fu, Yulan et al. Electrically driven active VO2/MXene metasurface for the terahertz modulation . | APPLIED PHYSICS LETTERS , 2022 , 121 (24) . |
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Abstract ：
本发明涉及一种自支撑VO2薄膜及其制备方法和应用，所述自支撑VO2薄膜的制备方法，包括以下步骤：在基底上形成VO2薄膜，所述VO2薄膜厚度为20nm及以上，所述VO2薄膜具有多个纳米孔洞，单位面积内所述纳米孔洞个数为1个/μm2～3个/μm2，所述VO2薄膜中面积为500nm2～2500nm2的所述纳米孔洞的占比为90％及以上；以及采用刻蚀液将所述基底刻蚀。
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| GB/T 7714 | 马赫 , 张新平 . 自支撑VO2薄膜及其制备方法和应用 : CN202110459285.5[P]. | 2021-04-27 . |
| MLA | 马赫 et al. "自支撑VO2薄膜及其制备方法和应用" : CN202110459285.5. | 2021-04-27 . |
| APA | 马赫 , 张新平 . 自支撑VO2薄膜及其制备方法和应用 : CN202110459285.5. | 2021-04-27 . |
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Abstract ：
Due to their high flexibility and adaptability, bionic robots have great potential in applications such as healthcare, rescue, and surveillance. The flexible actuator is an essential component of the bionic robot and determines its performance. Even though much progress has been achieved in bionic robot research, there still exists a great challenge in preparing a flexible actuator with a large stroke, high sensitivity, fast response, low triggering power, and long lifetime. This study presents a flexible actuator based on a paraffin wax and Ti3C2Tx MXene (PW-MX) film composite. Such a flexible actuator delivers an excellent actuation performance, including a large curvature change (2.2 x 10(2) m(-1)), high thermal sensitivity (4.6 m(-1)/degrees C), low triggering power of light (76 mW/cm(2)), wavelength selectivity, fast response (0.38 s), and long lifetime (>20000 cycles). Due to the high thermal sensitivity and the strong infrared absorption of the PW-MX film, crawling motion of an inchworm robot based on PW-MX film can be triggered by infrared irradiation from the human finger. To mimic living organisms with bioluminescence, we prepared a PW-MX actuator with green fluorescence by doping PW-MX film with CdSe/ZnS quantum dots. The integration of luminescent function enables the PW-MX actuator to deliver information under light stimulation and to camouflage under a background of green foliage actively. With its merits of ease of fabrication and high actuation performance, the flexible PW-MX actuator is expected to lend itself to more applications in the future.
Keyword ：
bionic robots bionic robots paraffin wax paraffin wax information delivery information delivery MXene MXene phase transition phase transition camouflage camouflage flexible actuator flexible actuator
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| GB/T 7714 | Xiao, Xiao , Ma, He , Zhang, Xinping . Flexible Photodriven Actuator Based on Gradient-Paraffin-Wax-Filled Ti3C2Tx MXene Film for Bionic Robots [J]. | ACS NANO , 2021 , 15 (8) : 12826-12835 . |
| MLA | Xiao, Xiao et al. "Flexible Photodriven Actuator Based on Gradient-Paraffin-Wax-Filled Ti3C2Tx MXene Film for Bionic Robots" . | ACS NANO 15 . 8 (2021) : 12826-12835 . |
| APA | Xiao, Xiao , Ma, He , Zhang, Xinping . Flexible Photodriven Actuator Based on Gradient-Paraffin-Wax-Filled Ti3C2Tx MXene Film for Bionic Robots . | ACS NANO , 2021 , 15 (8) , 12826-12835 . |
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Abstract ：
Energy-efficient components that are capable of intelligently regulating room temperature are much demanded to reduce the energy consumption in buildings. In recent years, phase change materials (PCMs) have been widely investigated for intelligent temperature regulation by taking advantages of their unique thermal, optical, and mechanical properties across phase transition. In this review, we summarize the mechanisms of PCMs for intelligent temperature regulation, including latent heat, optical modulation, and mechanical deformation. We then discuss the traditional PCMs, such as organic and inorganic PCMs with huge latent heats, and emerging PCMs, such as VO2, for the applications in temperature controls, smart windows, and radiative cooling surfaces. We finally point out where to focus for these PCMs to realize applications in buildings. This review provides insights into future research of PCMs for their intelligent applications. (C) 2021 Elsevier Ltd. All rights reserved.
Keyword ：
Latent heat Latent heat Mechanical deformation Mechanical deformation Smart windows Smart windows Self-adaptive radiative surfaces Self-adaptive radiative surfaces Vanadium dioxide Vanadium dioxide
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| GB/T 7714 | Guo, Ruihan , Shan, Linbo , Wu, Yonghuang et al. Phase-change materials for intelligent temperature regulation [J]. | MATERIALS TODAY ENERGY , 2021 , 23 . |
| MLA | Guo, Ruihan et al. "Phase-change materials for intelligent temperature regulation" . | MATERIALS TODAY ENERGY 23 (2021) . |
| APA | Guo, Ruihan , Shan, Linbo , Wu, Yonghuang , Cai, Yimao , Huang, Ru , Ma, He et al. Phase-change materials for intelligent temperature regulation . | MATERIALS TODAY ENERGY , 2021 , 23 . |
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Abstract ：
<正>由于具有多激励、宽谱响应、插入损耗小和响应速度快等优势, VO_2是一种理想的THz波主动调制材料。但是,由于传统半导体基底存在缺乏柔性、热容大、热导率低和不导电等问题,在硬质基底上难以实现高性能VO_2基THz波主动调制器件。为解决上述问题,申请人将VO2生长在顺排CNT薄膜上。顺排CNT薄膜具有沿CNT轴向有序排列的特性。
Keyword ：
偏振方向 偏振方向 二氧化钒 二氧化钒 THz THz 太赫兹波调制器 太赫兹波调制器
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| GB/T 7714 | 马赫 , 王钰 , 张新平 . 超低激发阈值柔性二氧化钒太赫兹波调制器 [J]. | 量子电子学报 , 2021 , 38 (01) : 123 . |
| MLA | 马赫 et al. "超低激发阈值柔性二氧化钒太赫兹波调制器" . | 量子电子学报 38 . 01 (2021) : 123 . |
| APA | 马赫 , 王钰 , 张新平 . 超低激发阈值柔性二氧化钒太赫兹波调制器 . | 量子电子学报 , 2021 , 38 (01) , 123 . |
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