MOLECULES
·
2022
·Vol. 27
·期 14
·4392
·
IF 4.927
Yangchao Xia,Dan Fang,Pengcheng Qu,Yonggai Li
Fatty acids, which are enriched in vegetable oil, have attracted much attention in low-rank coal flotation because of their unique chemical structure. In this study, density functional theory calculations, molecular dynamics simulations, and atomic force microscopy were employed to investigate the adsorption structure and forces between collectors and hydrophilic surfaces. The results show that fatty acids can be easily adsorbed onto surfaces through hydrogen bonds, and can cover the oxygen sites. The existence of hydration film on hydrophilic surfaces prevented nonpolar molecules from being able to adsorb, while polar fatty acids could adsorb and expel water molecules. The adhesion force between the RCOOH-terminated probe and the surface appeared in the retraction process, which differed significantly from that of the RCH3-terminated probe, indicating that polar fatty acids are more suitable as flotation collectors for low-rank coal than nonpolar hydrocarbon oil. The simulation and AFM test revealed the mechanisms of polar fatty acids, and can provide guidance for low-rank coal flotation applications.Keywords:flotation;low-rank coal;fatty acid collector;computer simulation;force measurement
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
DOI
PubMed
高影响因子
MEASUREMENT
·
2023
·
IF 5.6
Yi Xin,Junye Tong,Tianyuan Hou,Hongyan Liu,Meng Cui,Xuefeng Song,Yuhang Wang,Tingting Lin,Lingling Wang,Gang Wang
BiScO 3 -PbTiO 3 (BS-PT) has the high Curie temperature and excellent piezoelectric activity, and has the potential to fabricate high-performance piezoelectric devices. However, the fabrication of one-dimensional BS-PT piezoelectric sensor remains a great challenge. Here, pure phase BS-PT nanofibers are proposed and experimentally demonstrated by optimizing the concentration of the electrospinning additive and the sintering temperature, and the interdigital electrodes are combined to assemble the sensor. The BS-PT nanofibers piezoelectric sensor can maintain a stable sensitivity above 4 V/N in the range of 10–40 Hz at 60–200 °C. In addition, it has a nearly linear output voltage as the excitation pressure increases ranging from 0.07 N to 0.55 N in the range of 160–260 °C, and the sensitivity at 220 °C is still higher than 5.4 V/N. These results highlight the BS-PT nanofibers piezoelectric sensor is promising to be used for high-temperature pressure and vibration measurements.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
MEASUREMENT
·
2024
·
IF 5.2
Luheng Wang,Zhineng Hu,Wenju Shui,Fei Wu
To realize the compressive-pressure and non-contacting-distance measurements in the curved-interlayer-structure of modern-industrial-equipment under temperature-interference, the influences of temperature on the impedance-variations of the spiral conductive polymer composite (which possesses the tunneling-effect-based-conduction, the intrinsically-flexibility and the ability to induce eddy-current-effect) caused by the pressure and distance are studied. The pressure/distance-impedance-property repeatability increases with the increment of experimental-times, and the pressure/distance-impedance-characteristic is monotonically decreasing/increasing. When the temperature increases from 10 °C to 40 °C, the normalized-impedance-amplitude attenuates/increases and the normalized-impedance-angle raises/decreases under the same pressure/distance, and the sensitivities for the pressure/distance-impedance-property increases. The measurement system based on the two-levels-interpolation is developed and tested under temperature-interference. The testing-results show that the pressure-measurement-error is 8 % F.S. (0–0.65 MPa) and the distance-measurement-error is 5 % F.S. (0–2 mm). The results lay the foundation on revealing the distance/pressure/temperature-sensing-mechanisms of spiral composite, and verify the feasibility of using the spiral composite to measure the pressure/distance under different temperatures.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Haibo Li,Pengcheng Zhang,Gan Li,Junbo Lu,Quanwen Wu,Yuejiao Gu
Stress as an important parameter of thin films can seriously affect on the properties, performance and long-term stability of the films. Here, we propose a semiquantitative method based on Raman spectroscopy for the stress measurement on nonstoichiometric ceria oxide films . The “chemical strain” of lattice caused by oxygen deficits was a main obstacle factor for the stress measurement of CeO 2−δ films, which was overcome through the calibration of lattice vibration peaks by the normalized intensity of Ce 3+ ions in Raman spectra . A compressive stress about −1.38 ∼ −1.50 GPa was obtained on an oxidated Ce film, which was verified by the substrate-curvature method. Based on the proposed method, Raman spectroscopy could be expanded to wider application fields as an in-situ stress measurement tool, such as in the fields of oxygen-ion-conducting solid electrolytes , oxidation film of alloys, microelectronics and MEMS devices, etc.
研究领域:
材料科学
·
固态离子学
·
薄膜物理
·
微纳电子器件
·
MEMS
✓ 已验证
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 14
·10816-10824
·
IF 4.6
Qifei Ma,Huaizhou Jin,Weihong Wang,Shangzhong Jin
Emulsions stabilized by protein/polysaccharide complexes have attracted great interest. However, the emulsion properties and interactions between droplets at the microscale require further investigation. In this work, the interaction forces between two rice bran oil droplets stabilized by casein–chitosan complexes, with a diameter of 3 ± 0.1 μm (pH 5.54 and no-salt), were measured under different aqueous conditions (pH and ionic strength) using optical tweezers. The measured force curves exhibited consistency with the interfacial layer conformation and interfacial charge, as determined through fluorescence spectroscopy and zeta-potential analysis. Furthermore, atomic force microscopy (AFM) and optical microscopy were employed to characterize the morphology and structural evolution of the emulsions under varying environmental conditions. Our results provide a useful method for studying the interaction forces between Pickering emulsion droplets with pN force resolution and reveal the correlation between interfacial layer properties and physical stability, offering deep insights into the stabilization mechanism of Pickering emulsions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 48
·2507563
·
IF 19
Ke Su,Lefu Mei,Zunqi Liu,Xin Pan,Pengfei Shuai,Jiyang Xie,Bin Ma,Qingfeng Guo,Cunjian Lin,Mingxing Chen,Zhijian Peng,Libing Liao,Wanbiao Hu,Guocheng Lv
Balancing sensitivity and detection range in dynamic pressure monitoring materials remains challenging, with commercial ruby (Al 2 O 3 :Cr 3+ ) sensors limited by strong crystal fields, restricting performance under extreme conditions. Here, an innovative strategy utilizing an ordered-to-disordered structural conversion in Cr 3+ doped Ca(Mg,Sc)(Al,Si)O 6 phosphors is introduced. This approach achieves a remarkable blueshift sensitivity of 15.08 nm GPa −1 –2.8 times higher than ordered structures and 41 times higher than commercial sensors while maintaining a broad detection range up to 7.5 GPa. Moreover, enhanced structural rigidity notably improves luminescence intensity and thermal stability. The findings establish a robust paradigm for designing high-performance optical pressure sensors, significantly addressing the traditional trade-off between sensitivity and detection range, showing promising applications in geological exploration and aerospace fields.
研究领域:
材料科学
·
光学传感器
·
高压物理
·
发光材料
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2025
·
IF 14.1
Jiahao Guo,Qin Niu,Jilei Xu,Liyan Wang,Xiangyang Wang,Jiangdong Gong,Hanfei Zhu,Ruojiang Wang,Yu Chang,Tingrui Pan,Si Chen
Clear aligners offer aesthetic and comfort advantages in orthodontics, yet their ability to deliver effective forces relies heavily on empirical judgment or large-scale optical scanning, lacking real-time quantitative evaluation. Integrating pressure sensors into aligners is a promising solution, but challenges in miniaturization, multi-dimensional sensing, measurement accuracy, and biocompatibility hinder clinical application. Here, an all-in-one Orthodontic Force Acquisition System (OFAS) is presented that enables real-time, 3D force monitoring using a cross-shaped iontronic sensing array and an origami-inspired, wireless battery-free readout circuit miniaturized for single-tooth placement. The system employs a cross-linked polyelectrolyte with low creep and high repeatability, achieving 1.14% measurement accuracy. A 15-day in vivo study demonstrates that OFAS accurately captured dynamic force profiles with strong correlation to tooth displacement (R 2 > 0.99), confirming its feasibility for real-time, quantitative orthodontic force measurement and enabling timely treatment adjustments.
研究领域:
生物医学工程
·
口腔正畸学
·
柔性电子
·
智能可穿戴设备
·
转化医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Horizons
·
2019
·Vol. 6
·期 4
·703-710
·
IF 14.356
Ming Li,Weijun Li,Wei Cai,Xiaojie Zhang,Zhihang Wang,Jason Street,Wee-Jun Ong,Zhenhai Xia,Quan Xu
Light-guiding materials capable of total internal reflection, remote mechanical force sensing and self-healing are appealing in emerging fields including robotics and optical force measuring instruments. However, achieving all these features in a single material remains challenging at present. Herein, we have fabricated a fluorescence-responsive self-healing hydrogel with a triple network structure, which exhibits a 100% recovery in tensile strength after healing in air for 30 s and a 90% recovery in tensile strength after healing in water for 60 s. Furthermore, this material can resist a rotation of 1800° without breaking at the healed site. As the fluorescence excitation intensity of the hydrogel shows a good correspondence with the forces exerted on the hydrogel, the forces and the self-healing efficiency could be determined by measuring the intensity of the excitation peak. The stress states of the hydrogel in different liquids could be remotely monitored, eliminating the effect of surface contacts. With these sensing and self-healing abilities all in one, self-healing luminescent materials could be applied to tissue engineering, photoresponsive biosensors, flexible light guiding devices, structural health monitoring, etc.
研究领域:
材料科学
·
光学
·
机器人技术
·
生物医学工程
·
传感技术
✓ 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）