SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Yi Li,Yanbiao Li,Minoru Hashimoto
In this work, a novel planar actuator based on plasticized poly (vinyl chloride) gel and flexible silicone grease electrodes is proposed to realize a new soft actuator with high performance under low driving voltages. The proposed planar PVC gel actuator (PPGA) can demonstrate a strain of 21%, an output stress of over 0.6 MPa and a respond time of about 90 ms, only at a low driving voltage of 120 V. These performances are comparable to those of the biological muscle and are much better as compared to 10–12% strain and 0.09 MPa stress at 400 V for the traditional stainless electrodes-based multilayered PVC gel actuator (MPGA). In addition, compared to the typical planar dielectric elastomer actuator (DEA) (3 M VHB4905), the operating voltage and response time for the PPGA are reduced by one order of magnitude. A theoretical model is used to discuss the difference between the two types of actuators, finding a good agreement with the experimental results. Furthermore, the PPGA can be continuously actuated for more than 1 million times which shows a good durability. These results demonstrate the feasibility of PPGA as a soft actuator, so a wide application is expected.
研究领域:
材料科学
·
软体机器人学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 20
·2201188
·
IF 10.05
Guangyang Bao,Wenyuan Yu,Qianqian Fu,Jianping Ge
Electrically responsive photonic crystal (ERPC) based on particle electrophoresis is a promising material to construct reflective color displays with low-power-consumption and antiglare advantages. However, the high driving voltages for the polar ERPC inevitably cause electrochemical reactions on the electrode, which decreases the stability and reversibility of electrical response. Here, a weak-polar EPRC composed of hydrophobic SiO 2 particles, 1,2-dichlorobenzene (DCB), and dioctyl sulfosuccinate sodium salt (AOT) is fabricated based on the charge separation by AOT reverse micelles and formation of highly charged particles in DCB. Compared to the polar ERPCs, the SiO 2 /DCB-AOT ERPC works at much lower voltages (0.5–1.7 V) and still possesses a wide color tuning range because the weak-polar solvent applies less screening to the coulombic interactions. The low potential further renders the ERPC good capability against color fading in a strong field and long-term reversibility during color switching, which addresses the critical concerns for its application in reflective displays.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2025
·
IF 2.3
Yuou Yuan,Hengchang Nie,Zhiyan Guo,Jinghui Peng,Biao He,Genshui Wang,Shiguang Yan,Fanglin Du,Liang Shi,Xiaofei Qu,Shuai Zhang
Ferroelectric thin films have emerged as a research focus in recent years due to their outstanding performance and eco-friendliness. This study reports on the fabrication of high-quality 0.55Bi 0.5 Na 0.5 TiO 3 -0.45SrTiO 3 +0.5 mol% Mn+x mol% Co (BNT-ST-Mn-x%Co) thin films on LaNiO 3 /Si (100) substrates using the sol–gel and spin–coating techniques. Through comprehensive structural analysis using multiple techniques, including X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy, we demonstrate that cobalt incorporation enhances both the breakdown strength and relaxation properties of these films. Notably, the BNT-ST-Mn-1%Co film exhibits exceptional characteristics, achieving a maximum polarization of 73.62 µC/cm 2 under an electric field of 900 kV/cm, coupled with a dielectric constant of 1119 at 1 kHz. The co-doping of cobalt and manganese yields films with high polarization intensity even at lower electric fields, showcasing promising potential for a wide range of applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 38
·e202402768
·
IF 1.9
Guangfei Qu,Yun Zhang,Junyan Li,Zhishuncheng Li
Graphical Electrochemically catalyzed ionic liquid technology facilitates lignin cleavage at 230 °C, with vanillin yields reaching 88.54 % at 3 V and guaiacol yields at 48.24 % at 4 V, showcasing enhanced productivity in lignin-derived compounds. Significant attention has been devoted to using biomass as a renewable resource to address the energy crisis and mitigate environmental pollution. Biomass, a potential substitute for fossil fuels, contains a substantial amount of lignin, ranging from 10 % to 25 %. Hence, it is crucial to research lignin depolymerization. In this study, the use of electrochemically catalyzed ionic liquids enabled the cracking of lignin at low temperatures. Specifically, by applying a low voltage at 230 °C, the controlled generation of vanillin and guaiacol was achieved. The concentration of vanillin in the depolymerized lignin reached 88.54 % under 3 V conditions. Similarly, it is presumed that the yield of guaiacol at 4 V is 48.24 %. These findings have significant implications for the targeted management of lignin depolymerization byproducts. Ultimately, this project establishes a framework for the high-value utilization of biomass and provides new perspectives on addressing the energy problem and environmental degradation.
研究领域:
生物质能
·
有机化学
·
环境科学
✓ 已验证
DOI
高影响因子
LAB ON A CHIP
·
2024
·Vol. 24
·期 4
·896-903
·
IF 6.1
Qian Li,Pan Zhang,Zi Ye,Huimin Zhang,Xiao Sun,Lin Gui
The application of liquid metal in a microfluidic system enables the fabrication of highly integrated on-chip electroosmotic micropumps (EOPs). In this work, a low-voltage driveable integrated parallel EOP cluster drive system is proposed. This system consists of two layers, a branch-channel layer and a trunk-channel layer. The lower branch-channel layer contains separate parallel pumping channels and a pair of comb liquid metal electrodes. The separated branch channels are connected together through the trunk channels in the upper layer. With this structural arrangement, the parallel micropumps form an integrated micropump cluster for larger pumping capacity. The distance between the pumping channel and the electrode next to it is controlled to 20 μm. To guide the pump design, parametric studies are performed and fully discussed. According to the experimental results, the micropump cluster can be driven at a low voltage of 0.5 V, and the flow rate reaches 274 nL min−1 at 5 V. In addition, the paper finally proposes an electrode protection strategy and an integrated pump-valve drive system which is expected to solve the shortcoming of electroosmotic pumps in terms of long-time storage and driving.
CAS / MDL:
研究领域:
微纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jiguo Tu,Cheng Chang,Mingyong Wang,Wei Guan,Shuqiang Jiao
Compared with the widely developed positive electrodes, the research on the high stability negative electrodes is far from in-depth in nonaqueous Al batteries. In order to fundamentally solve these key problems, including Al dendrites, corrosion and pulverization, it is urgent to develop an alternative stable negative electrode. Herein, the corrosion-resistant, low-voltage-hysteresis and stable Zn is demonstrated as a promising negative electrode. Since the deposited Al particles on the Zn electrode are prior to Zn in the stripping reaction, Zn electrode can remain good structural integrality, thus presenting great cycling stability and corrosion resistance. Importantly, the results in Al-Zn symmetric cells indicate that Zn possesses the ultra-low voltage hysteresis (∼17 mV at 0.5 mA cm −2 ), superior cycling stability (800 cycles at 1.0 mA cm −2 ) and Al plating/stripping reversibility characteristics. Additionally, the Zn-graphite full battery based on Zn as negative electrode and flake graphite as positive electrode delivers stable discharge capacity of 81.1 mAh g −1 over 300 cycles. The results in this work open an effective approach for constructing corrosion-resistant, low-voltage-hysteresis and stable negative electrode, further indicating that Zn is great promising as negative electrode for Al dual-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
IONICS
·
2024
·
IF 2.4
Niu Hongkun,Wang Cong,Gao Bingliang,Tan Qi,Liu Zhiwei,An Ruifeng
In aluminum electrolysis cells, the emissions of perfluorocarbons (PFCs) are not only associated with the high-voltage anode effect (cell voltage > 8 V), but continuous emissions of PFCs have also been detected during cell voltage below 8 V, especially in high-amperage prebake cells. These PFCs are referred to as low-voltage anode effect PFCs (LVAE-PFCs). In this study, the influence of current density on the formation of fluorocarbon (CF x ) film was investigated on an industrial carbon anode with a bottom area of 50 cm 2 in a high-temperature see-through aluminum electrolysis cell operating at 940 °C. The formation of CF x films on localized areas of the anode under normal electrolysis conditions was confirmed through observations. The quantity of peeled CF x films and the value of the back electromotive force gradually increase with increasing current density. Simultaneously, the thermal decomposition of the CF x films results in the generation of PFCs. Under conditions of sufficient alumina concentration, the peeling of the CF x films contributes to a reduction in the cell voltage. X-ray photoelectron spectroscopy analysis revealed that regions with high current density on the carbon anode provide favorable conditions for the formation of CF x components with high resistance characteristics, inevitably leading to an increase in cell voltage.
研究领域:
材料科学
·
环境科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qianqian Fu,Yanxuan Zhao,Wenyuan Yu,Jianping Ge
Electrically responsive photonic crystal (ERPC) based on particle electrophoresis is a promising material for reflective color displays due to its bright and antiglare structural colors, low-voltage tuning, and good compatibility with the electrophoretic display techniques. However, there are still challenges to meet the multifaceted requirements for the display because of the low response sensitivity for most reported ERPCs. Here, we show a SiO 2 /(DEGEEA-Aniline) ERPC with high response sensitivity and ultra-low power consumption. This ERPC possesses a broad color tuning range (220 nm) because the moderate interaction between mixing solvents and SiO 2 particles ensures a low particle assembly concentration and a large space for lattice compression. Meanwhile, this ERPC works at low voltage (0 ∼ 1.3 V) due to the low dielectric constant of the solvents and the enhancement of Coulombic interaction. As a result, the ERPC exhibits a response sensitivity of 169.2 nm/V, which is higher than most reported electrophoretic ERPCs. More importantly, this ERPC merely consumes 1.09 μW/cm 2 in successive color tuning under the precondition of stable and reversible response, which saves 96.5 % of power compared to the traditional SiO 2 /PCb ERPC.
研究领域:
材料科学
·
显示技术
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2025
·
IF 17.1
Lixin Bai,Juan Chen,Yi Zhang,Zheng Yi,Yuansen Xie,Maowen Xu,Yuruo Qi
The intrinsic sodium storage performance of hard carbons is fundamentally governed by its structure attributes, which are primarily shaped by the precursor material. Therefore, a direct manipulation of precursors at the molecular level offers considerable flexibility in engineering hard carbon architectures. This study introduces a straightforward and effective pre-carbonization approach to modulate the molecular configuration and functional groups within celluloses, employing both oxygen-bridging and air-etching to stimulate the development of closed pores during carbonization. These closed pores not only facilitate the transport of sodium ions but also serve as active sites for sodium storage, resulting in a hard carbon with an impressive specific capacity of 421.1 mA h g −1 and a substantial low-voltage plateau capacity of 312.8 mA h g −1 . Extensive research has elucidated the formation mechanism of closed pores as well as its correlation with low-voltage plateau capacity, which will greatly forward the rational design of high-performance hard carbon anodes for next-generation sodium ion batteries.
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2009
·Vol. 19
·期 33
·5952-5955
·
IF 4.646
Yijie Lu,Hongwei Xia,Guangzhao Zhang,Chi Wu
Electrically tunable full color display photonic crystals (PCs) made of a thin film of block copolymer, polystyrene-b-poly(2-vinyl pyridine) (PS-b-P2VP), have been developed. The phase separation of PS and P2VP blocks leads to a one-dimensional periodic lamellar structure parallel to the surface of the thin film. In a solvent mixture of water and ethanol, each P2VP layer is swollen and partially charged. Applying a low voltage (<2.5 V) to such a thin film can lead to the repeatable expansion or contraction of each P2VP layer, depending on the direction and strength of the electrical potential. Such a variation of the lamellar periodicity leads to a full color display over a wide range from ultraviolet to near infrared. The advantages of such PCs are their facile preparation, low driving voltage and good durability, which make them potentially useful in information technologies.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Tiechen Yu,Yuntao Han,Hongyan Yao,Zheng Chen,Shaowei Guan
In recent years, colorless-to-black electrochromic (EC) and electrofluorochromic (EFC) materials are attracting increasing interest for the fundamental scientific research and potential applications. In order to achieve multiple-response optoelectronic materials with better black conversion and solid-state fluorescence performance (black-color/emission dual-switchable materials), we adopted a novel design strategy to synthesis a diamine monomer named TPE-NH 2, in which the π-core tetraphenylethene (TPE) connects with two oxidation centers. All the polyamides/polyimides based on this monomer exhibited good solubility, thermal stability and aggregation-induced emission (AIE) activity. Among these, polyamide 5a not only showed rare EC properties (colorless-to-black) with ultra-low voltage (0–0.75 V), high optical contrasts (up to 87.9% at 692 nm) and fast switching times (2.04/1.45 s) but also demonstrated high fluorescence properties with the introduction of TPE. In addition, polyamide 5a showed good continuous switching stability for EC property and acceptable stability for EFC property, which makes it a potential candidate in EC/EFC applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
InfoMat
·
2025
·
IF 22.3
Longchao Huang,Weili Deng,Guo Tian,Yue Sun,Tao Yang,Boling Lan,Xuelan Li,Yang Liu,Tianpei Xu,Shenglong Wang,Yong Ao,Jieling Zhang,Long Jin,Weiqing Yang
Bioinspired soft robots hold great potential to perform tasks in unstructured terrains. Ferroelectric polymers are highly valued in soft robots for their flexibility, lightweight, and electrically controllable deformation. However, achieving large strains in ferroelectric polymers typically requires high driving voltages, posing a significant challenge for practical applications. In this study, we investigate the role of crystalline domain size in enhancing the electrostrain performance of the relaxor ferroelectric polymer poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene-fluorinated alkynes) (P(VDF-TrFE-CFE-FA)). Leveraging its remarkable inverse piezoelectric coefficient (| d 33 *| = 701 pm V −1 ), we demonstrate that the planar films exhibit a five times larger bending angle than that of commercial PVDF films at low electric fields. Based on this material, we design a petal-structured soft robot that achieves a curvature of up to 4.5 cm −1 at a DC electric field of 30 V μm −1 . When integrated into a bipedal soft robot, it manifests outstanding electrostrain performance, achieving rapid locomotion of ~19 body lengths per second (BL s −1 ) at 10 V μm −1 (560 Hz). Moreover, the developed robot demonstrates remarkable abilities in climbing slopes and carrying heavy loads. These findings open new avenues for developing low-voltage-driven soft robots with significant promise for practical applications.
研究领域:
材料科学
·
机器人学
·
生物启发工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）