SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yaxuan Xiao,Xiong Zhao,Li Ma,Yichen Wang,Guoxin Mao,Jinhua Zhang,Bin Fang,Nanjing Hao
Bioinspired by the transformations of animals and plants such as pangolins and mimosas, many biomimetic shape-morphing systems have been developed. However, due to scale effect, microscale interactions become the dominant force, which may make the traditional shape-morphing systems ineffective. Acoustic actuation is expected to overcome this challenge. Here, we have developed an acoustically actuated hydrogel shape-morphing micromachine (AHSMM). It has a variable stiffness design, with the lower stiffness part serving as a flexible hinge to achieve transformation. Under the excitation of acoustic field, the flexible hinge produces strong oscillation and quickly provides the force and torque required for the transformation of AHSMM (generally less than 500 ms). In addition, we have developed a preprogrammed design for the transformation of micromachine to predict its transformation morphology. Furthermore, through the AHSMM, we have separately designed morphing transformations between Chinese characters (e.g., “夫” (fu) to “央” (yang)) and English letters (e.g., “k” to “x”). Finally, we developed a shape-morphing microrobot (width: 174.33 μm) utilizing this flexible hinge, which can pass through a narrow channel through its own shape-morphing, providing great potential in targeted drug delivery (the shape-morphing time is less than 100 ms, the forward speed can reach about 800 μm/s). Our work not only provides innovative ideas for shape-morphing design at the microscale, but also expands the coupling applications of acoustics, soft matter, and microrobots.
研究领域:
生物医学工程
·
微型机器人技术
·
柔性机器人
·
声学
·
仿生学
·
水凝胶技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 37
·2101024
·
IF 18.808
Zhengxin Zhu,Yahan Meng,Yi Cui,Wei Chen
Rechargeable hydrogen gas batteries are highly desirable for large-scale energy storage because of their long life cycle, high round trip efficiency, fast reaction kinetics, and hydrogen gas profusion. Coupling advanced cathode chemistries with hydrogen gas anode is an emerging and exciting area of research. Here, a novel high-performance aqueous iodine-hydrogen gas (I 2 -H 2 ) battery using iodine as cathode and hydrogen gas as the electrocatalytic anode in environmentally benign aqueous electrolytes is reported. The working chemistry of the battery involves I 2 /I − solid-liquid reactions occurring over the cathode along with H 2 /H 2 O gas-liquid reactions at the anode, achieving a high rate performance of 100 C and long-lasting stability of over 60 000 cycles. Additionally, the static aqueous I 2 -H 2 battery displays a volumetric capacity of 15.5 Ah L −1 along with good self-healing capability towards cell overcharge. The current battery design exhibits robust electrochemical performance irrespective of acidic, neutral, and alkaline electrolyte systems. This study paves the way towards the industrialization of economically effective, high-power density, and long-term I 2 -H 2 batteries for large-scale energy storage applications.
研究领域:
能源科学
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Shu Zhang,Xin Li,Dandan Chu
An inexpensive, abundant electroactive organic molecule, 3,4-Dihydroxy-9,10-anthraquinone-2-sulfonic acid (ARS) is proposed to serve as the redox active material in the negative side of flow batteries . The electrochemical characteristics and mass transport properties are discussed in this work. The diffusion coefficient of ARS is calculated as 2.14 × 10 −6 cm 2 s −1 , and the kinetic rate constant of ARS is further measured as 3.6 × 10 −3 cm s −1 , which is faster than other metal redox active species used in flow batteries , such as Fe 3+ /Fe 2+ , Cr 3+ /Cr 2+ , VO 2 + /VO 2+ , and Ce 4+ /Ce 3+ . Unlike metal redox materials, ARS will not suffer from the resource constraints. Combining 1,2-benzoquinone-3,5-disulfonic acid (BQDS) as the positive electroactive species and H 2 SO 4 solution as the supporting electrolyte , the different charging-discharging behavior and the polarization curves exhibited a good performance with our laboratory design flow cell. It can be concluded that the ARS presents a unique opportunity for developing a promising and cost-effective alternative for metal-free flow batteries.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2016
·Vol. 5
·期 6
·1155-1158
·
IF 4.872
Zuguang Shen,Guocheng Han,Xiaoying Wang,Jiwen Luo,Runcang Sun
This study reported the direct utilization of bagasse as an ultra-light aerogel with AgNPs for the first time. Firstly, AgNPs were synthesized in situ using a green route with bagasse, a by-product of the refined sugar industry. During the reaction, the crystalline region of cellulose in bagasse was destroyed, and some groups of bagasse were partly oxidized into CO of ketone, which confirms the reducing capacity of bagasse. Then, the obtained bagasse–AgNP composite was dissolved in EmimAc to prepare an aerogel with AgNPs. The aerogel piled up in slices, and its weight after swelling in water was about 19 times the dry weight, and the aerogel did not crush a flower branch because its density was only 0.035 g cm−3, although the mole and mass ratios of the Ag atom were 5.26% and 29.94% in the aerogel, respectively. Furthermore, the obtained aerogel showed a strong antibacterial effect, especially against E. coli and P. aeruginosa. This study not only provides an interesting way for bagasse to be applied directly, but also develops an antibacterial biomass-based ultra-light aerogel without AgNP dissociation.
研究领域:
材料科学
·
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2016
·
IF 7.476
Yingjie Li,Yuqin Li,Yaoyu Wu,Fushen Lu,Yaowen Chen,Wenhua Gao
Endonucleases cleavage of DNA plays an important role in biological and medicinal chemistry . This work was going to develop a reliable and sensitive electrochemiluminescent (ECL) biosensor for detecting endonucleases by using gold nanoparticles graphene composite (GNPs-graphene) as a signal amplifier. Firstly, the GNPs and graphene were simultaneously deposited on the glassy carbon electrode (GCE) by cyclic voltammetry . Then a stem DNA was anchored on the surface of GCE. And with a modifying DNA introduced into the electrode by DNA assembly, a strong ECL signal was obtained. After a DNA modified with ferrocene assembly to the stem DNA, the ECL signal had a sharp decrease due to the quench effect of ferrocene to and the biosensor comes into being a “off” state. With the effect of endonuclease, the ECL signal had a recovery because of the ferrocene being released and the biosensor formed a “on” state. Moreover, the recovery of ECL signal was related to the concentration of endonucleases. Combining specific defined DNA and endonuclease, this method has a potential to detect different endonucleases. In this work, we took the EcoRI as an example to identify the feasibility of ECL biosensor in applying in sensitive detection of endonucleases using a GNPs-graphene signal amplifier. Under optimal condition, the proposed biosensor obtained a low limit of detection (LOD) 5.6×10 −5 U mL −1 . And the stability, selectivity and reproducibility of the biosensor also were researched.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 43
·16871-16878
·
IF 7.367
Jiheng Ding,Hongran Zhao,Qiaolei Wang,Huimin Dou,Hao Chen,Haibin Yu
Graphene nanosheets (GNSs) possess outstanding conductivity, good thermal and chemical stabilities and desirable mechanical strengths. However, the unfunctionalized GNSs are hydrophobic and insoluble in water, which limits their application in many technological areas. Herein, we report a design strategy to exfoliate few-layered aqueous dispersible graphene by a simple ball-milling technique. The modifier of sodium lignosulfonate (LS) enables to synthesize LS-decorated GNSs from natural graphite based on the strong π–π interaction, greatly improving GNSs dispersion in water. The resultant GNSs exhibit a high production yield (∼100%), high dispersion concentration and excellent film formation ability. The electrical and thermal conductivities of the as-prepared graphene paper were up to 2385 S cm−1 and 1324 W m−1 K−1, respectively, superior to those of most previously reported graphene materials. This graphene paper with the superb electrical and thermal conduction properties also exhibits excellent mechanical flexibility and structure intensity during bending, which has potential usages in electronic packaging and high power thermal management.
研究领域:
材料科学
·
热管理技术
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 40
·2004247
·
IF 16.836
Maoxin Chen,Lei Wang,Xinghao Sheng,Tao Wang,Jian Zhou,Shengyang Li,Xiaohua Shen,Meng Zhang,Qiusheng Zhang,Xinzhi Yu,Jian Zhu,Bingan Lu
Potassium-ion hybrid capacitors (PIHCs) show great potential in large-scale energy storage due to the advantages of electrochemical capacitors and potassium-ion batteries. However, their development remains at the preliminary stage and is mainly limited by the kinetic imbalance between the two electrodes. Herein, an architecture of NbSe 2 nanosheets embedded in N, Se co-doped carbon nanofibers (NbSe 2 /NSeCNFs) as flexible, free-standing, and binder-free anodes for PIHCs is reported. The NbSe 2 /NSeCNFs with hierarchically porous structure and N, Se co-doping afford highly efficient channels for fast transportation of potassium ions and electrons during repeated cycling process. Furthermore, excellent electrochemical reversibility of the NbSe 2 /NSeCNFs electrode is demonstrated through in situ XRD, in situ Raman, ex situ transmission electron microscopy and element mapping. Thus, PIHCs with the NbSe 2 /NSeCNFs anode and active carbon cathode achieve a high energy of 145 W h kg −1 at a current density of 50 mA g −1 , as well as an ultra-long cycle life of over 10 000 cycles at a high current density of 2 A g −1 . These results indicate that the assembled PIHCs display great potential for applications in the field of ultra-long cycling energy storage devices.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
·
IF 16.6
Zhang Yuchun,Liu Lin,Tu Bin,Cui Bin,Guo Jiahui,Zhao Xing,Wang Jingyu,Yan Yong
Shrinking the size of the electronic synapse to molecular length-scale, for example, an artificial synapse directly fabricated by using individual or monolayer molecules, is important for maximizing the integration density, reducing the energy consumption, and enabling functionalities not easily achieved by other synaptic materials. Here, we show that the conductance of the self-assembled peptide molecule monolayer could be dynamically modulated by placing electrical biases, enabling us to implement basic synaptic functions. Both short-term plasticity (e.g., paired-pulse facilitation) and long-term plasticity (e.g., spike-timing-dependent plasticity) are demonstrated in a single molecular synapse. The dynamic current response is due to a combination of both chemical gating and coordination effects between Ag + and hosting groups within peptides which adjusts the electron hopping rate through the molecular junction. In the end, based on the nonlinearity and short-term synaptic characteristics, the molecular synapses are utilized as reservoirs for waveform recognition with 100% accuracy at a small mask length.
研究领域:
神经科学
·
材料科学
·
纳米技术
·
电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NATURE MATERIALS
·
2023
·Vol. 22
·期 8
·958-963
·
IF 41.2
Li Mingqiang,Shen Yidi,Luo Kun,An Qi,Gao Peng,Xiao Penghao,Zou Yu
Dislocation motion, an important mechanism underlying crystal plasticity, is critical for the hardening, processing and application of a wide range of structural and functional materials. For decades, the movement of dislocations has been widely observed in crystalline solids under mechanical loading. However, the goal of manipulating dislocation motion via a non-mechanical field alone remains elusive. Here we present real-time observations of dislocation motion controlled solely by using an external electric field in single-crystalline zinc sulfide—the dislocations can move back and forth depending on the direction of the electric field. We reveal the non-stoichiometric nature of dislocation cores and determine their charge characteristics. Both negatively and positively charged dislocations are directly resolved, and their glide barriers decrease under an electric field, explaining the experimental observations. This study provides direct evidence of dislocation dynamics controlled by a non-mechanical stimulus and opens up the possibility of modulating dislocation-related properties.
研究领域:
材料科学
·
固体物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Bioscience
·
2024
·
IF 4.8
Zishan Dou,Yang Xu,Jingli Liu,Wei Chen
LVLPGE is an angiotensin-converting enzyme (ACE) inhibitory peptide extracted from broccoli protein hydrolysates. The antihypertensive mechanism of LVLPGE was explored in the present study. The results indicated that the IC 50 value of LVLPGE was 19.49 μM, and its binding to ACE occurred via a static fluorescence quenching involving the secondary structure changes of ACE. In addition, LVLPGE competitively bound to the active site of ACE through hydrogen bonding. Furthermore, LVLPGE markedly enhanced the levels of the vasodilator nitric oxide (NO) in the Ang I-induced HUVECs model, suppressed the expression of vasoconstrictor endothelin-1 (ET-1), and increased the phosphorylation of eNOS. Moreover, LVLPGE was found to enhance the production of cyclic guanosine monophosphate (cGMP), which leading to a subsequent decrease in intracellular calcium concentration, ultimately facilitating the relaxation of vascular smooth muscles and lowering the blood pressure. These results demonstrated that LVLPGE achieves the antihypertensive effects by inhibiting ACE activity and activating the eNOS/NO/cGMP signaling pathway. This study provides new insights into the antihypertensive mechanism of LVLPGE and contributes to the high-value utilization of broccoli resources.
研究领域:
药理学
·
心血管科学
·
功能性食品
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Horizons
·
2019
·Vol. 5
·期 3
·541-552
·
IF 9.095
Congyi Wu,Tian Zhang,Jian Zhang,Jin Huang,Xing Tang,Tingting Zhou,Youmin Rong,Yu Huang,Songxin Shi,Dawen Zeng
Flexible tactile sensors that imitate the skin tactile system have attracted extensive research interest due to their potential applications in medical diagnosis, intelligent robots and so on. However, it is still a great challenge to date to fabricate tactile sensors with both high sensitivity and wide detection range due to the difficulties in modulating the resistance variation in the sensing materials in a wide pressure range. Here, a tactile sensor with a novel design based on the hierarchical pressure-peak effect (HPPE) consisting of PVP nanowires and electroless deposition (ELD) silver PDMS micro-pyramids is reported. The HPPE can effectively modulate the resistance change rate by adjusting the change of contact area during compression deformation, and the HPPE tactile sensor was demonstrated to have both ultrahigh sensitivity (11.60–1108.75 kPa−1) and ultrawide pressure range (0.04–600 kPa). The designed HPPE tactile sensor is successfully utilized in detecting multi-level pressures including respiration, finger heart rate, pulse and foot pressures. Moreover, it is used to sense a subtle clamping force in the Leonardo Da Vinci surgical robot demonstrating the potential of the sensor in surgical robot applications. In all these cases, the sensor exhibits enough capability to respond quickly to ultrawide-range pressures with high accuracy and stability.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Ke-Meng Song,Shi-Ye Chang,Yuan Yuan,Fang-Lei Zeng,Ning Li,Han-Bing Chen,Ping Lu,Ning-Yi Yuan,Jian-Ning Ding
Lithium (Li) metal’s extremely high specific energy and low potential make it critical for high-performance batteries. However, uncontrolled dendrite growth and an unstable solid-electrolyte interphase (SEI) during repeated cycling still seriously hinder its practical application in Li metal batteries. Herein, we demonstrate a facile and effective approach to fabricate a flexible and robust hybrid SEI layer using two kinds of organo-polysulfides with different sulfur chain lengths [bis(3-(triethoxysilyl)propyl)disulfide (Si–O–2S) and bis(3-(triethoxysilyl)propyl)tetrasulfide (Si–O–4S)] as the additives in the electrolyte. Compared to Si–O–2S, the siloxane and the long sulfur chain in Si–O–4S are conducive to the production of LixSiSy inorganic components on lithium metal surfaces and the formation of an organic–inorganic hybrid stable SEI layer in conjunction with LixSiOy, thereby improving the stability of the SEI layer and inhibiting the growth of lithium dendrites. Specifically, with 10 wt % Si–O–4S as the additive, an excellent cycling lifespan (1400 h) was achieved with a low hysteresis voltage of ∼17 mV at 1.0 mA cm–2 in a Li–Li symmetrical cell. Moreover, the lithium–sulfur battery also exhibits long cycling stability (850 mA h g–1 at 0.5 C after 200 cycles) and good Coulombic efficiency (99.5%). This study provides an electrolyte additive strategy for the Li anode fabricating a stable SEI layer and long cycling batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）