Nature Communications
·
2021
·Vol. 12
·期 1
·1-11
·
IF 14.919
Tang Wei,Zhang Chao,Zhong Yiding,Zhu Pingan,Hu Yu,Jiao Zhongdong,Wei Xiaofeng,Lu Gang,Wang Jinrong,Liang Yuwen,Lin Yangqiao,Wang Wei,Yang Huayong,Zou Jun
Recent advances in soft materials enable robots to possess safer human-machine interaction ways and adaptive motions, yet there remain substantial challenges to develop universal driving power sources that can achieve performance trade-offs between actuation, speed, portability, and reliability in untethered applications. Here, we introduce a class of fully soft electronic pumps that utilize electrical energy to pump liquid through electrons and ions migration mechanism. Soft pumps combine good portability with excellent actuation performances. We develop special functional liquids that merge unique properties of electrically actuation and self-healing function, providing a direction for self-healing fluid power systems. Appearances and pumpabilities of soft pumps could be customized to meet personalized needs of diverse robots. Combined with a homemade miniature high-voltage power converter, two different soft pumps are implanted into robotic fish and vehicle to achieve their untethered motions, illustrating broad potential of soft pumps as universal power sources in untethered soft robotics.
研究领域:
材料科学
·
机器人学
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF RAMAN SPECTROSCOPY
·
2019
·Vol. 50
·期 8
·1074-1084
·
IF 2.809
Shuang Lin,Xiang Lin,Xueying Song,Siqingaowa Han,Li Wang,Wuliji Hasi
Surface-enhanced Raman scattering (SERS) substrate is the key to SERS technology and it is still a basic focus to fabricate desirable SERS substrates offering multiple advantages of strong Raman enhancement and good reproducibility and portability. A flexible paper-based SERS substrate were fabricated involving the use of Au nanocubes (NCs) monolayer. Au NCs were generated with tunable size in the range of 24 to 63 nm through seed-mediated growth method. The effect of support on SERS properties of Au NCs–assembled monolayer was systemically explored. As a result, more excellent SERS performance could be obtained by assembling Au NCs on the filter paper. Besides, the influence of Au NCs' size on SERS-enhanced effect of paper-based substrate was also investigated. Our results clearly indicated that paper-based substrate with 39 nm Au NCs possessed the optimal SERS enhancement. This SERS substrate exhibited high sensitivity with enhancement factor (EF) up to 9.75 × 10 7 and demonstrated good uniformity and time stability. Furthermore, based on this superior paper-based SERS substrate with advantage of powerful sample extraction performance, the measurement of crystal violet (CV) on shell surface were successfully carried out with detection limit down to 2.17 × 10 −7 M. And linear quantification were achieved in the range from 5 × 10 −5 to 5 × 10 −7 M. To sum up, the as-prepared SERS substrate is applicable for on-site detection and analysis of CV on various shell surfaces.
研究领域:
材料科学
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED THERMAL ENGINEERING
·
2024
·
IF 6.1
Miao Sun,Linyan Yang,Xu Du,Yuan Gao,Xinghai Zhou,Baozhong Sun,Lihua Lyu
Solar-driven interfacial evaporation technology holds great potential for efficiently utilizing solar energy to convert untapped water sources into clean water. This study developed a cellulose nanofiber (CNF)/polyvinyl alcohol (PVA)/multi-walled carbon nanotubes (MWCNTs) hydrogel-based evaporator (PCC) using low-cost wood pulp cellulose as the raw material. The experimental results revealed that the PCC hydrogel evaporator achieved a water evaporation rate of 1.61 kg·m −2 ·h −1 under 1 sun irradiation (solar intensity of 1 kW·m −2 ). Assisted by the three-dimensional interconnected hydrophilic network, the hydrogel exhibited excellent water supply capabilities, with water transport dominating within the hydrogel, enabling continuous steam generation from seawater. And the water layer formed by the super-hydrophilic pore wall structure was also beneficial to activating water, promoting the diffusion of high-concentration salt water, and enhancing the underwater oil repellent ability. After multiple compression-recovery performance tests, the PCC maintained stable evaporation performance, which greatly enhanced portability during use. In addition, the application of PCC evaporators in the fields of seawater desalination, wastewater treatment, and agricultural irrigation had shown excellent results, confirming the potential application value of this evaporator. Combined with its environmental friendliness, cost-effectiveness, and other advantages, it had broad development prospects.
研究领域:
材料科学
·
环境科学
·
能源技术
·
水处理
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 106
·期 5
·2953-2962
·
IF 4.186
Zhihao Dong,Peiyao Zhao,Zhenyong Cen,Xiaohui Wang
On the road of lead-free piezoelectric ceramics into practical applications, the study of Ni-internal-electrode (K, Na)NbO 3 -based (KNN-based) multilayer actuators (MLAs) is an important part, possessing the advantages of environmentally friendly and low cost. The Ni-internal-electrode KNN-based MLAs with different layer numbers and layer thicknesses were fabricated via the tape casting method and sintered in the reducing atmosphere. The piezoelectric layers consist of the main KNN-based phase and a trace amount of second phase Mn 4 Nb 2 O 9 . The element diffusion between the Ni electrodes and KNN-based grains is tiny, indicating that Ni is suitable for co-firing with KNN-based ceramics. After sintering, the compressive stress perpendicular to the thickness direction and the “relative tensile stress” parallel to the thickness direction are retained in the MLAs, bringing influences on the piezoelectric and dielectric properties of KNN-based materials. Compared with the bulk ceramics, the prepared MLAs significantly reduce the driving voltages and increase the displacement outputs, which are more applicable to the scenarios of miniaturization and portability. Particularly, the 46-layer actuator shows high displacements of 1580 and 2737 nm under the voltages of 100 and 200 V, respectively. However, the inverse piezoelectric coefficient d 33 * for each layer of MLAs is still lower than that of the bulk ceramics, indicating that the piezoelectric properties of the KNN-based materials are suppressed. To give full play to the piezoelectric properties of KNN-based materials, more attentions should be paid to the design of reasonable electrode structure and the development of internal electrode paste for MLAs.
研究领域:
材料科学
·
电陶瓷
·
压电材料
·
致动器
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Fenglong Li,Zhengyang Kong,Xiaolin Wang,Guyue Wang,Chao Chen,Ying Tian,Zhiyi Lyu,Kyung Jin Lee,Do Hwan Kim,Jung-Yong Lee,Jin Zhu,Wu Bin Ying
Central Sleep Apnea (CSA) is characterized by respiratory pauses during sleep, posing risks like cardiovascular diseases, stroke and sudden death. The challenges in managing it arise from the current monitoring tools, which are often complicated and inaccurate. Furthermore, respiratory pauses leading to decreased blood oxygen can induce profuse sweating, further affecting accuracy. Herein, we have synthesized a bio-based, biocompatible and sweat-resistant polyurethane . By utilizing it as the matrix, we incorporated [BMIM] + [PF 6 ] − to fabricate a markedly sensitive dielectric material, termed i-DFPU. The fluorine groups in i-DFPU contributed to a trap-release effect for migratable ions, while the alkyl side chains provided smooth ion migration channels, endowing i-DFPU with exceptional sensitivity. In combination with a stress concentration layer and serpentine-shaped electrodes, the resultant iontronic skin exhibited a remarkable sensitivity up to 132.2 kPa −1 , operational stability and portability. Consequently, it could accurately monitor various respiratory states in CSA, potentially preventing complications such as sudden death.
研究领域:
材料科学
·
生物医学工程
·
睡眠医学
✓ 已验证
产品关联
DOI
高影响因子
Biosensors-Basel
·
2022
·Vol. 13
·期 1
·7
·
IF 5.743
Huiping Fu,Ning Ding,Dan Ma,Qing Xu,Bingyong Lin,Bin Qiu,Zhenyu Lin,Longhua Guo
In this work, a simple, low-cost, green, and mild method for the preparation of three-dimensional nanocomposite materials of gold nanorods (Au NRs)@TiO2is reported. The surface of Au NRs was coated with TiO2in situ reduction at room temperature without a complicated operation. The synthetic Au NRs@TiO2nanocomposites were used as surface-enhanced Raman spectroscopy (SERS) active substrates for the reusable and sensitive detection of environmental pollutants. The results showed that the pollutants on Au NRs@TiO2nanocomposites have higher SERS activity and reproducibility than those on the Au NR substrate without the presence of TiO2. Moreover, the SERS substrate can be readily recycled by UV-assisted self-cleaning to remove residual analyte molecules. Malachite green (MG) and crystal violet (CV) were used as examples to demonstrate the feasibility of the proposed sensor for the sensitive detection of environmental pollutants. The results showed that the limit of detections (LODs) were 0.75 μg/L and 0.50 μg/L for MG and CV, respectively, with the recoveries ranging from 86.67% to 91.20% and 83.70% to 89.00%. Meanwhile, the SERS substrate can be easily regenerated by UV light irradiation. Our investigation revealed that within three cycles, the Au NRs@TiO2substrates still maintained the high SERS enhancement effect that they showed when first used for SERS detection. These results indicated that the method can be used to detect MG and CV in really complex samples. Due to the high sensitivity, reusability, and portability and the rapid detection property of the proposed sensor, it can have potential applications in the on-site detection of environmental pollutants in a complex sample matrix.Keywords:surface-enhanced Raman spectroscopy (SERS);self-cleaning;photocatalytic activity;recyclable;environmental pollutants
研究领域:
材料科学
·
环境科学
·
分析化学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 29
·2200457
·
IF 19.924
Ganguang Yang,Kanhao Zhu,Wei Guo,Dongrui Wu,Xueliang Quan,Xin Huang,Shaoyu Liu,Yangyang Li,Han Fang,Yuqi Qiu,Qingyang Zheng,Mengliang Zhu,Jian Huang,Zhigang Zeng,Zhouping Yin,Hao Wu
Traditional human emotion recognition is based on electroencephalogram (EEG) data collection technologies which rely on plenty of rigid electrodes and lack anti-interference, wearing comfort, and portability. Moreover, a significant distribution difference in EEG data also results in low classification accuracy. Here, on-skin biosensors with adhesive and hydrophobic bilayer hydrogel (AHBH) as interfaces for high accuracy emotion classification are proposed. The AHBH achieves remarkable adhesion (59.7 N m −1 ) by combining the adhesion mechanism of catechol groups and electrostatic attraction. Meanwhile, based on the synergistic effects of hydrophobic group rearrangements and surface energy reduction, the AHB-hydrophobic layer exhibits 133.87° water contact angles through hydrophobic treatment of only 0.5 h. Hydrogen and electrostatic bonds are also introduced to form a seamless adhesive-hydrophobic hydrogel interface and inhibit adhesion attenuation, respectively. With the AHBH as an ideal device/skin interface, the biosensor can reliably collect high-quality electrophysiological signals even under vibration, sweating, and long-lasting monitoring condition. Furthermore, the on-skin electrodes, data processing, and wireless modules are integrated into a portable headband for EEG-based emotion classification. A domain adaptive neural network based on the transfer learning technique is introduced to alleviate the effect of domain shift and achieve high classification accuracy.
研究领域:
生物医学工程
·
材料科学
·
神经科学
·
信号处理
·
机器学习
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）