WATER RESEARCH
·
2023
·
IF 12.8
Qingwen Qin,Lutian Wang,Juan Li,Hui Jia,Jie Wang
As a factor affecting the efficiency of hollow fiber membrane filtration, air resistance is gradually being discovered. To obtain a better air resistance control strategy, in the study, two representative strategies have been proposed, namely, membrane vibration and inner surface modification, which was achieved by aeration combined with looseness-induced membrane vibration and dopamine (PDA) hydrophilic modification of the inner surface, respectively. The performance of two strategies was based on Fiber Bragg Grating (FBG) sensing technology and ultrasonic phased array (UPA) technology to achieve real-time monitoring. Mathematical model result shows that in hollow fiber membrane modules, the initial appearance of air resistance causes a rapid reduction in filtration efficiency, while this effect diminishes as the air resistance increases. Besides, experimental results show that aeration combined with fiber looseness helps to inhibit air aggregation and accelerate air escape, while inner surface modification enhances the hydrophilicity of inner surface, weakens the air adhesion and increases the drag force of fluid on air bubbles. In the corresponding optimized state, both strategies perform well in optimizing the air resistance control, and the improvement in flux enhancement ability for the two strategies is 26.92 and 34.10%, respectively.
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
Nano Energy
·
2019
·
IF 15.548
Yuanyuan Zhao,Jialong Duan,Yudi Wang,Xiya Yang,Qunwei Tang
All-inorganic cesium lead bromide (CsPbBr 3 ) perovskite solar cell is one promising candidate to balance high efficiency and poor stability of organic-inorganic hybrid photovoltaics . The charge carrier transport can be maximized for high-efficiency devices through precise stress control during perovskite grain growth process to obtain high-quality full-bromine CsPbBr 3 halide films. We present here the monolayer-aligned and large-grained CsPbBr 3 perovskite films through precise control of crystallization temperature of PbBr 2 film because the lattice volume is enlarged by 2.18 times during the phase conversion from PbBr 2 to CsPbBr 3 , which helps to minimize residual-stress-induced grain boundaries and defect-induced charge recombination. Upon further interfacial modification by nitrogen doped carbon quantum dots , the hole transporting materials free, all-inorganic CsPbBr 3 perovskite solar cell achieves a champion efficiency as high as 10.71% with an ultrahigh open-circuit voltage of 1.622 V. Moreover, the unencapsulated solar cell demonstrates remarkable long-term stability in 85% humidity in air atmosphere.
研究领域:
材料科学
·
光伏技术
·
纳米技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 30
·17766-17774
·
IF 10.733
Guomin Ding,Weicheng Jiao,Rongguo Wang,Meiling Yan,Zhenming Chu,Xiaodong He
Smart materials with underwater motion detection have become a popular research topic with the development of ocean exploration. Herein, a heterogeneous polydimethylsiloxane/open-cell graphene network (PDMS/OCGN) with a micro–nanoscale hierarchical structure is fabricated via a simple inverse drying method. The PDMS/OCGN has a special microstructure due to the PDMS-coated surface and the uncoated interior, which enables the material to exhibit both strong superhydrophobicity and high electrical conductivity simultaneously. In addition, the adhesive force of PDMS/OCGNs for water droplets can easily be controlled from 70.6 μN to 34.0 μN by adjusting the coating content. On this basis, the lossless transportation of water microdroplets is achieved in this paper. By means of the typical underwater state and deformable network of PDMS/OCGNs, for the first time, a superhydrophobic material with rapid sensing capability for immersion and emersion processes, owing to the abrupt change in its resistance, is reported. More importantly, the vertical dive and horizontal movement in water can also be detected in real time. Furthermore, the PDMS/OCGN can identify the diving depth and moving speed via the degree of change in resistance. Therefore, this multifunctional PDMS/OCGN may be an excellent candidate for the fabrication of underwater sensing devices.
研究领域:
材料科学
·
智能材料
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Xinwei Liu,Xiao Wang,Jiexun Bu,Xiaoyu Zhou,Zheng Ouyang
Miniature mass spectrometers are of an increasing interest for in-situ analyses, and their coupling with the ambient ionization sources is a valid path for direct analysis of complex samples. In this study, a miniature mass spectrometer using discontinuous atmospheric pressure interface was developed with a dual-LIT (linear ion trap) configuration. The comprehensive scan modes were enabled for tandem mass spectrometry analysis, which are critical for high-quality qualitative and quantitative analysis. A real-time pressure control was implemented to facilitate the ion transfer and collision induced dissociation (CID). Beam-type CID could be performed for tandem analysis at a high number of stages. In-trap CID at high q could also be performed with the fragment ions accumulated in a second trap. A precursor ion scan mode for analyzing target analytes has also been demonstrated.
研究领域:
分析化学
·
质谱技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2019
·
IF 6.864
Ying Huang,Wei Hu,Xinli Wang,Xiaohui Guo,Chao Hao,Yunong Zhao,Xiao Zeng,Ping Liu
A phase transition-controlled force actuator based on graphene/Ag/SR (silicone rubber) has been designed and fabricated. This actuator is based on the principles of phase transition. The actuator with an enclosed cavity, which consisted of a latex film and a graphene/Ag/SR-based electrothermal substrate, and then injecting ethanol into the cavity. The actuator can operate at a low voltage (6 V), and the magnitude of the feedback force can be controlled by applying a square wave signal which the duty cycle is adjustable. The minimal change in feedback force is 0.02 N. Owing to its simple fabrication, easy operation, lightweight (1.4 g), low driving voltage , large deformation and controllable force, manipulator, auto-injector and bionic fish have been made. Summarizing aforementioned experimental results, the manipulator can grip objects of different weights, and the auto-injector can inject a liquid and act as an injector . Furthermore, bionic fish can float and sink in the water. These devices showing that the phase transition actuator is expected to be widely used in soft robots , bionic devices design, and medical field. Also, this category of phase transition actuator could provide ideas for developing flexible actuator.
研究领域:
材料科学
·
生物医学工程
·
机器人学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Jun Li,Enbo Zhang,Xiuyan Ren
Conductive polyurethane foams as piezoresistive sensors have attracted considerable attention due to their promising applications in a variety of fields. However, there is still a challenge in high response to the strain of the conductive polyurethane foam. In this work, we constructed the high strain-response conductive polyurethane foam by immersing reduced graphene oxide and sodium alginate into the polyurethane foam. The high sensitivity of polyurethane foam to mechanical deformation was due to the change in the stacking degree of reduced graphene oxide induced by the deformation of polyurethane foam. The introduction of sodium alginate ensured the open pore structure and quick recovery of polyurethane foam. The polyurethane foam could achieve a good recovery of stress (98%) and the self-recovery was almost near to 100% after 5 min. Moreover, the conductivity of the reduced graphene oxide-loaded polyurethane foam was 0.013 S/m at 20% strain and 0.115 S/m at 70% strain. The high current sensitivity ranged from 13 µA to 100 mA corresponding to the strain ranging from 1% to 70%. The brightness of LED lamps was highly sensitive to the change of compressive strain, and the conductive polyurethane foam could accurately monitor the signal (bending of foam and bending of the elbow). Therefore, the conductive polyurethane foam should have broad application in various fields, for example, pressure control switches and strain sensors.
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
NATURE
·
2025
·Vol. 647
·期 8091
·889-896
·
IF 48.5
Xue Yaoting,Cao Jiasheng,Feng Tao,Zhang Kaihang,Li Siyang,Hu Jiahao,Guo Haotian,Zhang Jinming,Song Yaoxian,Wang Zhuofan,Wang Lei,Huang Qishan,Zhou Haofei,Zhou Fanghao,Shen Jiliang,Fan Yaowei,Wang Zhe,Li Xinge,Wong Jie-Wei,Chen Zhiwei,Ruan Dongrui,Miao Zhikun,Zhang Bin,Zhou Enjie,Gan Letian,Wang Xuanqi,Cao Ertai,Chen Tong,Zou Weifeng,Zhang Junhui,Lu Haojian,Zhang Qinghai,Liu Song,Dong Huixu,Xiong Shiying,Peng Shuyou,Wong Tuck-Whye,Chen Yuanjie,Li Tiefeng,Chen Mingyu,Yang Xuxu,Yang Wei,Cai Xiujun
Mechanical transmission is essential in force-related activities ranging from the daily tying of shoe laces 1 to sophisticated surgical 2 and robotic operations 3 , 4 . Modern machines and robots typically use complex electronic devices designed to sense and limit force 5 , some of which still face challenges when operating space is limited (for example, in minimally invasive surgeries) 6 or when resources are scarce (for example, operations in remote areas without electricity). Here we describe an alternative slipknot-based mechanical transmission mechanism to control the intelligent operation of both human and robotic systems. Through topological design, slipknot tying and release can encode and deliver force with a consistency of 95.4% in repeating operations, which circumvents the need for additional sensors and controllers. When applied to surgical repair, this mechanism helped inexperienced surgeons to improve their knotting-force precision by 121%, enabling them to perform surgical knots as good as those of experienced surgeons. Moreover, blood supply and tissue healing after surgery were improved. The mechano-intelligence exhibited in slipknots may inspire investigations of knotted structures across multiple length scales. This slipknot-gauged mechanical transmission strategy can be widely deployed, opening up opportunities for resource-limited healthcare, science education and field exploration.
研究领域:
机械工程
·
机器人学
·
生物医学工程
·
手术技术
·
智能材料与结构
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2019
·Vol. 304
·期 8
·1900174
·
IF 3.038
Gang Wu,Wei Li,Weinan Ni,Lei Chen,Gang Sun,Bo You
A facile “surface tension controlling” method is proposed for the preparation of nonspherical fluorinated acrylate polymer particles (FANPPs) with four different morphologies by adjusting the compositions of polystyrene (PS) cores and monomers in shell layers. The FANPPs are fabricated through an inexpensive and template-free emulsion polymerization process that allows control of their morphologies. Scanning electronic microscopy, the Wilhelmy plate method, and differential scanning calorimetry are applied to investigate the structures and properties of the FANPPs. The formation mechanism of these unique morphologies is rationalized in terms of a selective wetting process, whereby surface tension and incompatibility between the PS cores and fluorinated shell layers are modified. These novel nanoparticles are first applied to fabricate light-diffusing films that show both high transmittance and high haze value. The light-diffusing properties are tested by means of a haze meter. The nonspherical structure of the FANPPs greatly influences their light-diffusing properties.
研究领域:
材料科学
·
光学材料
·
聚合物化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-12
·
IF 16.6
Lin Yan,Wang Tuo,Zhang Lili,Zhang Gong,Li Lulu,Chang Qingfeng,Pang Zifan,Gao Hui,Huang Kai,Zhang Peng,Zhao Zhi-Jian,Pei Chunlei,Gong Jinlong
The mechanism of how interfacial wettability impacts the CO 2 electroreduction pathways to ethylene and ethanol remains unclear. This paper describes the design and realization of controllable equilibrium of kinetic-controlled *CO and *H via modifying alkanethiols with different alkyl chain lengths to reveal its contribution to ethylene and ethanol pathways. Characterization and simulation reveal that the mass transport of CO 2 and H 2 O is related with interfacial wettability, which may result in the variation of kinetic-controlled *CO and *H ratio, which affects ethylene and ethanol pathways. Through modulating the hydrophilic interface to superhydrophobic interface, the reaction limitation shifts from insufficient supply of kinetic-controlled *CO to that of *H. The ethanol to ethylene ratio can be continuously tailored in a wide range from 0.9 to 1.92, with remarkable Faradaic efficiencies toward ethanol and multi-carbon (C 2+ ) products up to 53.7% and 86.1%, respectively. A C 2+ Faradaic efficiency of 80.3% can be achieved with a high C 2+ partial current density of 321 mA cm −2 , which is among the highest selectivity at such current densities.
研究领域:
化学工程
·
电化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Xu Bin,Li Yawen,Hong Peibin,Zhang Peijie,Han Jiang,Xiao Zewen,Quan Zewei
Hybrid metal halides represent a novel type of semiconductor light emitters with intriguing excitonic emission properties, including free exciton emission and self-trapped exciton emission. Achieving precise control over these two excitonic emissions in hybrid metal halides is highly desired yet remains challenging. Here, the complete transformation from intrinsically broadband self-trapped exciton emission to distinctively sharp free exciton emission in a quasi-one-dimensional hybrid metal halide (C 2 H 10 N 2 ) 8 [Pb 4 Br 18 ]·6Br with a ribbon width of n = 4, is successfully achieved based on high-pressure method. During compression, pressure-induced phonon hardening continuously reduces exciton–phonon coupling, therefore suppressing excitonic localization and quenching the original self-trapped exciton emission. Notably, further compression triggers excitonic delocalization to induce intense free exciton emission, accompanied with reduced carrier effective masses and improved charge distribution. Controlled high-pressure investigations indicate that the ribbon width of n > 2 is necessary to realize excitonic delocalization and generate free exciton emissions in similar quasi-one-dimensional hybrid metal halides. This work presents an important photophysical process of excitonic transitions from self-trapped exciton emission to free exciton emission in quasi-one-dimensional hybrid metal halides without chemical regulation, promoting the rational synthesis of hybrid metal halides with desired excitonic emissions.
研究领域:
材料科学
·
光电学
·
半导体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Yang Zhang,Ziyi Meng,Dongqing Yan,Peng Sun,Qianyu Shang,Ying Liu,Jingang Yao,Jun Wang
Piezoelectric membranes have attracted increasing attention due to their potential to offer pressure-responsive and electromechanical coupling functionalities in pressure-driven filtrations. Despite demonstrated antifouling effectiveness against model foulants, their practical performance within realistic and integrated treatment processes remains inadequately explored. Herein, a piezoelectric PVDF/GO ultrafiltration membrane (PEM) was fabricated and integrated into an online coagulation–ultrafiltration (C–UF) system to mitigate cake layer fouling. During pressure-driven filtration processes, the PEM not only exhibited a self-powered capability with oscillatory output signals (e.g., ∼0.4 V at 30 kPa), but also demonstrated a tunable and markedly enhanced response under dynamic pressure gradients (e.g., ∼1.1 V with a pressure gradient of 2 kPa/s). Based on these observations, a dynamic-pressure-control (DPC) strategy was developed for real-time regulation of piezoelectric output, adaptively responding to the stage-wise progression of cake fouling. Compared with the control membrane, the PEM under DPC operation exhibited ∼60 % lower irreversible filtration resistance and nearly threefold greater cake porosity. Moreover, implementing the DPC procedure for just 3 min per cycle enabled the PEM to sustain robust self-cleaning performance and enhanced permeate quality throughout a multi-cycle filtration test, achieving ∼50 % lower filtration resistance compared to physical cleaning method. Mechanistic analysis suggested that, under piezoelectric activation, the altered floc deposition dynamics and polarization-induced reorganization may act synergistically to shape both the structure and composition of the cake matrix, thereby inhibiting cake growth and subsequent compaction. This work provides a practical operational guidance for retrofitting PEM technology into existing C–UF systems, representing a viable strategy for advancing the application of piezoelectric membranes.
研究领域:
膜技术
·
水处理
·
压电材料
·
环境工程
·
分离过程
✓ 已验证
产品关联
DOI
高影响因子
Science Advances
·
2024
·Vol. 10
·期 30
·
IF 11.7
Ye Qiu,Fangnan Wang,Zhuang Zhang,Kuanqiang Shi,Yi Song,Jiutian Lu,Minjia Xu,Mengyuan Qian,Wenan Zhang,Jixuan Wu,Zheng Zhang,Hao Chai,Aiping Liu,Hanqing Jiang,Huaping Wu
Replicating human somatosensory networks in robots is crucial for dexterous manipulation, ensuring the appropriate grasping force for objects of varying softness and textures. Despite advances in artificial haptic sensing for object recognition, accurately quantifying haptic perceptions to discern softness and texture remains challenging. Here, we report a methodology that uses a bimodal haptic sensor to capture multidimensional static and dynamic stimuli, allowing for the simultaneous quantification of softness and texture features. This method demonstrates synergistic measurements of elastic and frictional coefficients, thereby providing a universal strategy for acquiring the adaptive gripping force necessary for scarless, antislippage interaction with delicate objects. Equipped with this sensor, a robotic manipulator identifies porcine mucosal features with 98.44% accuracy and stably grasps visually indistinguishable mature white strawberries, enabling reliable tissue palpation and intelligent picking. The design concept and comprehensive guidelines presented would provide insights into haptic sensor development, promising benefits for robotics.
研究领域:
机器人学
·
触觉传感
·
生物医学工程
·
人工体感
·
机器感知
·
传感器设计
·
智能操作
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）