Journal of Materials Chemistry C
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2024
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IF 5.7
Dan Wang,Zhen Hou,Fengling Wang,Hui Zhang,Jiwei Jiang,Bin Dong
Light-driven rotary actuators have undergone tremendous progress in recent years and show great potential for different applications ranging from sensors, soft robots to micro–nano intelligent systems. However, most photoactuators with rotary motions have a low rotational speed due to their low responsive speed and small driving force, which hinder both their fundamental and practical research. In this paper, we report a fast rotation of a soft actuator in response to light, which harnesses the synergistic interactions between two binary responsive components, i.e. water responsive agar and photothermally responsive polypyrrole, leading to a structural protrusion at the irradiation center that provides a jet-propulsion when the gas expands to the edge of the film. Interestingly, the motion behavior of the photoactuator film could be well controlled from the in-place rotation to horizontal motion as a result of the fast rotation with a speed as high as 5200 rpm. The current study indicates a fast rotation could be realized by the simple design and fabrication, which may not only stimulate the exploration of new motion behaviors for photothermal actuators but also open up new opportunities for their practical applications.
研究领域:
材料科学
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智能系统
·
纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL PHYSICS
·
2024
·Vol. 160
·期 23
·
IF 3.1
Li Meiyue,Tian Xiao,Du Weiping,Wang Xiujuan,Lei Juncheng,Gao Tianyue,Zou Siyu,Xu Xuefang,Wang Hao,Chen Junhua,Gou Qian
The rotational spectrum of an acrolein–formaldehyde complex has been characterized using pulsed jet Fourier transform microwave spectroscopy complemented with quantum chemical calculations. One isomer has been observed in pulsed jets, which is stabilized by a dominant O=C⋯O tetrel bond (n → π* interaction) and a secondary C–H⋯O hydrogen bond. Splittings arising from the internal rotation of formaldehyde around its C 2v axis were also observed, from which its V 2 barrier was evaluated. It seems that when V 2 equals or exceeds 4.61 kJ mol −1 , no splitting of the spectral lines of the rotational spectrum was observed. The nature of the non-covalent interactions of the target complex is elucidated through natural bond orbital analysis. These findings contribute to a deeper understanding on the non-covalent interactions within the dimeric complex formed by two aldehydes.
研究领域:
物理化学
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量子化学
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分子光谱学
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产品关联
DOI
PubMed
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
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2022
·
IF 3.752
Hong-fu LIN,Wei WENG,Shui-ping ZHONG,Guan-zhou QIU
High-efficiency recovery of Zn and Pb from silicon-rich zinc leaching residues is realized in a rotary kiln. Characterizations by means of XRD, SEM, EDS and ICP reveal that the leaching residue contains 12.4 wt.% SiO 2 , 16.1 wt.% Zn, and 7.4 wt.% Pb. Thermodynamic analysis shows that metallic vapor of Zn and Pb can be easily generated from the zinc leaching residue at 1150−1250 °C inside the rotary kiln. Viscosities and melting points of 13 slag compositions were analyzed and three slag compositions (47wt.%SiO 2 −23wt.%CaO−30wt.%FeO, 40wt.%SiO 2 − 28wt.%CaO−32wt.%FeO, and 40wt.%SiO 2 −30wt.%CaO−30wt.%FeO) possessed the desirable physical properties, with the melting point and viscosity in the range of 1150−1280 °C and 0.2−0.5 Pa·s, respectively. The industrial tests show that adopting the optimized slag composition can contribute to very high recovery rates of Zn and Pb (97.3% for Zn and 94.5% for Pb), corresponding to slags with very low average contents of Zn and Pb (0.51 wt.% Zn and 0.45 wt.% Pb). The National-Standard leaching tests of the water-quenched slags result in 1.82 mg/L Zn, ~0.01 mg/L Cu, 0.0004 mg/L As, ~0.01 mg/L Cd, 0.08 mg/L Pb, and ~0.02 mg/L Hg in the leachate, verifying the detoxification of the zinc leaching residue at the same time.
研究领域:
冶金工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
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2022
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IF 3.466
Jianfeng Xue,Zheng Wang,Hong Zhang,Yan He
Viscoelastic characterization is of great importance for the investigation of biomolecular condensates. Single-particle-tracking-based rotational diffusion analysis of single nanorods is an effective approach for quantitative viscosity measurement. However, in the case of high background and noise with high-speed image acquisition, accurate extraction of diffusivity from the data is a challenging task. Here, we develop a novel frequency-domain-based deep learning (DL) method for single nanorod rotational tracking analysis. We synthesized Brownian rotational time-series data for training, designed a data preprocessing module to reduce the effect of noise, and extracted rotational diffusion coefficient using recurrent neural networks in the frequency domain. Compared with the traditional curve-fitting-based methods, our method shows higher accuracy and a wider detection range for viscosity measurement. We verified our method using experimental data from plasmonic imaging of single gold nanorods (AuNRs) in glycerol solution and PGL droplets. Our method can be potentially applied to the viscosity measurement of different biomolecular condensates in vitro and in vivo.
研究领域:
生物物理学
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生物技术
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机器学习
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
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2020
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IF 5.778
Junyang Zhang,Haijian Tong,Wenkai Pei,Wenhua Liu,Fengyan Shi,Yan Li,Yuning Huo
A synergistic system of integrated photocatalysis-adsorption-membrane separation in a rotating reactor was designed. The composite membrane was prepared via filtration process under vacuum, and it was composed of graphene oxide (GO) acted as the separation membrane, activated carbon (AC) as the adsorbent and Ag@BiOBr as the photocatalyst, respectively. In this Ag@BiOBr/AC/GO membrane system, rotation of the membrane could avoid the light-shielding effect from organic color pollutants to achieve the complete removal of pollutants. More importantly, the synergistic effect among photocatalysis , adsorption and membrane separation in rotating reactor was significant for the efficient removal of rhodamine B (RhB). In the Ag@BiOBr/AC/GO composite membrane, GO membrane layer could reject the organic molecular by the assistance of AC layer with efficient adsorption capacity, and Ag@BiOBr at outer layer could photodegrade the organics under visible light irradiation. The photocatalysis process could solve the problem of membrane fouling and adsorption could assist GO membrane for stopping the permeation of pollutants. Meanwhile, GO membrane was not only beneficial for catalyst recovery, but also could concentrate the pollutants via the membrane separation to accelerate the photocatalytic degradation . At the same time, both the photocatalysis degradation and membrane separation could promote the adsorption ability of AC. This synergistic system showed the significant potential for the practical application in the future.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Nanoscale
·
2016
·Vol. 8
·期 41
·17881-17886
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IF 7.76
Xiaogang Gu,Qingxia Fan,Feng Yang,Le Cai,Nan Zhang,Wenbin Zhou,Weiya Zhou,Sishen Xie
Hybrid hydro-responsive actuators are developed by infiltrating carbon nanotube yarns using poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate). These actuators demonstrate impressive rotation and contraction in response to water due to volumetric expansion of the helical arrangement of carbon nanotubes. The total torsional stroke is 3720 revolutions per m and the simultaneously generated contractive strain reaches 24% at a paddle-to-yarn mass ratio of 350. The contraction output can furthermore be significantly enhanced by constraining the rotational motion and it reaches 68% with an applied stress of 1 MPa. Additionally, hybrid yarns exhibit an approximately linear response to humidity changes and show extra capability of electrical actuation, which, combined with the excellent hydro-actuation performance, endow them with great potential for a variety of applications including artificial muscles, hydro-driven generators, moisture switches and microfluidic mixers.
研究领域:
材料科学
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生物工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Man Wang,Jianqiang Xiao,Jian Zhang,Lei Zhao,Yingdan Song,Zhichao Liu,Ting Wang,Xuhui Xu,Jie Yu
Mechanoluminescence (ML) materials have the ability to emit light under mechanical force, allowing for visible mechanical force distribution and making them valuable for applications in smart textiles and wearable sensors. Detecting the force rate is crucial for applications, such as haptic feedback devices and mechanical monitoring, but visualizing the speed of strain has not been achieved yet. In this study, we have successfully visualized the strain rate by monitoring the ML tailing lengths of red, green, and blue (RGB) ML materials, including CaF 2 : Tm 3+ , CaF 2 : Eu 3+ , and CaF 2 : Tb 3+ phosphors. These materials exhibit varying ML tailing lengths at identical rotation speed of friction force, due to their distinct lifetime of the emitting centers. By incorporating these RGB ML phosphors into a composite film, the discrepancies in ML tailing lengths across different colors become visible, with these differences becoming more pronounced as the rotation speeds rise. Ultimately, the visualization of rotational speed in bearings was achieved successfully based on the vivid color changes in the ML tailing length at different speeds.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Pengxiang Si,Mingrui Liang,Jihua Zou,Yu Kuang,Juntao Zhang,Qingsha S. Cheng,Yiqian Kong,Yuxin Cai,Guozhi Huang,Yun Wu,Zhu Long,Boxin Zhao,Dan Zhang
Bio-integrated electronic devices are skin-mounted accurate tools for acquiring biological signals. The knee joint is one of the most important joints for human movement, playing a crucial role in functions such as walking, standing, sitting and containing important physiological health information about orthopedic disease diagnosis, prevention, and rehabilitation. However, it is still challenging to precisely and directly monitor joint rotation via skin-mounted bio-integrated electronic devices because joints are hidden inside the skin. In this study, we design a reusable, sustainable, battery-free, wireless, and flexible antenna sticker to adhere to the skin that can directly measure knee joint rotation degree. The antenna sticker is adhered to the lower leg and powered by electromagnetic radiation from a radio frequency identification (RFID) reader. When rotating the knee, the distance between the antenna sticker and the reader changes, leading to an alteration in the received signal strength indicator (RSSI). Meanwhile, the 3D optical motion capture system collects joint rotation data as a “gold standard”. After matching two series of real-time data using the Gaussian method, one RSSI can represent one specific joint rotation degree. The antenna sticker is stable at a variety of humidity and temperatures. The antenna sticker shows great potential to sense joint rotation and human motions. The scientific insights and engineering principles revealed in this antenna sticker will be applicable to a broad range of applications including skin-mounted epidermal electronics and wearable devices.
研究领域:
生物医学工程
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电子皮肤
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无线通信
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产品关联
DOI
高影响因子
CHIRALITY
·
2020
·Vol. 32
·期 8
·1072-1079
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IF 2.171
Xing Liu,Jinlong Yang,Zhihao Geng,Hongzhi Jia
We present a new method based on optical null methods for simultaneously measuring the optical rotatory dispersion (ORD) and absorption spectra of chiral substances. The optical rotation angle at a specific wavelength can be obtained from the optical nulls of the Malus curves with and without the sample. We use the optical nulls of the two curves as benchmark points and the readings to the right of the benchmark points by a certain angular offset to eliminate the influence of the analyzer on the light intensity and obtain the absorbance of the chiral substance at a specific wavelength. The 4096 pixels of the line scan CCD can measure multiple wavelengths simultaneously so that continuous ORD and absorption spectra can be obtained. The experimental results show that the standard deviation of the specific optical rotation is 0.11 deg mL g −1 dm −1 , the standard deviation of the maximum absorption wavelength is 0.45 nm, and that absorbance of the sample varies linearly with the concentration. This method is helpful for simplifying the experiment and has a profound influence on the analysis of the contents and molecular configurations of chiral substances in the future.
研究领域:
分析化学
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光学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 2
·1015-1020
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IF 3.119
Xing Wei,Yu-Jia Wang,Tie-Qiang Ren,Hai-Yan Wang,Min Wei
Hydrothermal synthesis is a typical method for the preparation of TS-1. In the current study, agitation was introduced during the crystallisation stage, and nano-sized TS-1 with little anatase TiO2 was successfully synthesised in a short time (1–8 h). Furthermore, under rotational crystallisation conditions, a series of TS-1 samples was prepared with different crystallisation times, and the products obtained were investigated as catalysts for the oxidative desulfurisation of thiophene from a model fuel. All samples were characterised utilising X-ray diffraction (XRD), scanning electron microscopy (SEM), N2-adsorption, ultraviolet-visible (UV-Vis) spectroscopy and Fourier-transform infrared (FT-IR) spectroscopy techniques. It was found that under rotational crystallisation conditions, nano-sized TS-1 could be synthesised in a short time that had improved efficiency for the oxidative desulfurisation reaction of thiophene in comparison with TS-1 synthesised by static crystallisation for 24 h.
研究领域:
材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2017
·Vol. 22
·期 2
·337
·
IF 2.861
Fang Li,Wai Szeto,Haibao Huang,Jiantao Li,Dennis Y. C. Leung
A photocatalytic rotating disc reactor (PRD-reactor) with TiO2nanowire arrays deposited on a thin Ti plate is fabricated and tested for industrial wastewater treatment. Results indicate that the PRD-reactor shows excellent decolorization capability when tested with methyl orange (>97.5%). Advanced oxidation processes (AOP), including photocatalytic oxidation and photolytic reaction, occurred during the processing. Efficiency of the AOP increases with reduction in light absorption pathlength, which enhanced the photocatalytic reaction, as well as by increasing oxygen exposure of the wastewater thin film due to the rotating disc design. It is found that, with a small dosage of hydrogen peroxide, the mineralization efficiency of industrial biodegraded wastewater can be enhanced, with a superior mineralization of >75% total organic carbon (TOC) removal. This is due to the fact that the TiO2photocatalysis and hydrogen peroxide processes generate powerful oxidants (hydroxyl radicals) that can strongly improve photocatalytic oxidation efficiency. Application of this industrial wastewater treatment system is benefited from the TiO2nanowire arrays, which can be fabricated by a mild solvothermal method at 80 °C and under atmospheric pressure. Similar morphologies and microstructures are found for the TiO2nanowire arrays deposited on a large metal Ti disc, which makes the wastewater treatment process more practical and economical.Keywords:TiO2nanowire arrays;photocatalytic rotating reactor;wastewater treatment
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Lixuan Zhang,Xiaoying Li,Dianjun Hu,Ziyu Liu,Tengfei Xie,Lexiang Wu,Zhaoxiang Yang,Jiang Li
Transparent Tb 2 Ti 2 O 7 magneto-optical ceramics were fabricated from co-precipitated nano-powders by vacuum pre-sintering with hot isostatic pressing (HIP) post-treatment. The formation of pyrochlore phase, decomposition of the precursor, and the morphology of powders calcined at different temperatures were investigated. The in-line transmittance of Tb 2 Ti 2 O 7 ceramics, which were pre-sintered at 1350 ℃ for 2 h with HIP post-treatment at 1450 ℃ for 3 h and subsequently annealed at 800 ℃ for 20 h in NH 3 atmosphere, reaches 65.5 % at 1064 nm. The Verdet constant of Tb 2 Ti 2 O 7 ceramics is −229.0 ± 0.6 rad·T −1 m −1 at the wavelength of 633 nm, which is 71 % higher than that of the commercial Tb 3 Ga 5 O 12 crystals. Tb 2 Ti 2 O 7 magneto-optical ceramics show a promising application for Faraday rotators.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
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