IF 13.3 2区材料科学

Small Pub Date : 2025-04-24 DOI: 10.1002/smll.202501666

Junyu Wang, Xiaomin Li, Yuhong Liu

{"title":"Physically Entangled Hydrogels Constructed Through Pre-Stretched Backbone Provide Excellent Comprehensive Mechanical Properties","authors":"Junyu Wang, Xiaomin Li, Yuhong Liu","doi":"10.1002/smll.202501666","DOIUrl":"https://doi.org/10.1002/smll.202501666","url":null,"abstract":"It is difficult for hydrogels to have both excellent stiffness and toughness in conventional polymer networks. Physically entangled hydrogels provide ideas to solve this problem, but the loss of physical entanglement in the swelling process does not effectively utilize the potential of this approach. In this work, the hydrogel is synthesized including two layers of interpenetrating physically entangled networks, the backbone network and the filler network. According to rubberlike elasticity theory, the backbone network inhibits the swelling of the filler network retaining a large amount of physical entanglements, inheriting and enhancing the advantages of physically entanglement hydrogels. The stiffness of the hydrogel reaches 0.33 MPa, and the fracture toughness reaches 1.93 × 104 J m−2, which shows significant advantages over other hydrogels. The removable physical entanglements tend to favor an ideal uniform network after being subjected to cyclic loading, and the toughness and fracture strain improve more than 2 times to 4.2 MJ m−3 and 7.2, respectively. The fatigue threshold reaches 5.41 × 103 J m−2, which is five times higher than the fatigue-resistant hydrogels. The present work perfectly inherits the physically entangled network structure while realizing the anti-swelling property, which provides a way to break the toughness-stiffness conflict intractable in hydrogels.","PeriodicalId":228,"journal":{"name":"Small","volume":"7 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

(ReMoV)X2 (X = S, Se) Ternary Alloy Nanosheets for Enhanced Electrocatalytic Hydrogen Evolution Reaction 增强电催化析氢反应的（ReMoV）X2 （X = S, Se）三元合金纳米片

IF 13.3 2区材料科学

Small Pub Date : 2025-04-24 DOI: 10.1002/smll.202503399

Junaid Ihsan, Ju Yeon Kim, In Hye Kwak, Irtiqa Mishal, Jun Hyeok Choi, Jung Eun Ahn, Sang-Gil Lee, Seung Jo Yoo, Ik Seon Kwon, Jeunghee Park, Hong Seok Kang

{"title":"(ReMoV)X2 (X = S, Se) Ternary Alloy Nanosheets for Enhanced Electrocatalytic Hydrogen Evolution Reaction","authors":"Junaid Ihsan, Ju Yeon Kim, In Hye Kwak, Irtiqa Mishal, Jun Hyeok Choi, Jung Eun Ahn, Sang-Gil Lee, Seung Jo Yoo, Ik Seon Kwon, Jeunghee Park, Hong Seok Kang","doi":"10.1002/smll.202503399","DOIUrl":"https://doi.org/10.1002/smll.202503399","url":null,"abstract":"Modulating the electronic structure of 2D transition metal dichalcogenides via alloying can extend their potential applications. In this study, composition-tuned ternary alloy nanosheets of (ReMoV)X2 (X = S and Se) are synthesized using solvothermal and colloidal reactions, respectively. Ternary alloying occurred with homogeneous atomic mixing over a wide range of compositions (xV = 0.16–0.80). Compared to (ReV)X2 binary alloying, ternary alloying produces a more metallic phase with less oxidation. Increasing xV induces a phase change into a more metallic 1T phase. The (ReMoV)S2 nanosheets demonstrate enhanced electrocatalytic activity toward the acidic hydrogen evolution reaction (HER) compared to (ReV)S2. Density functional theory calculations predict that ternary alloying increases the metallicity of the nanosheets. In addition, the Gibbs free energy calculation for hydrogen adsorption (ΔGH*) shows that ternary alloying effectively activates the basal S atoms for the HER, supporting the enhanced catalytic performance observed experimentally.","PeriodicalId":228,"journal":{"name":"Small","volume":"71 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanoconfined Solvothermal Synthesis of Defective 1T-MoS2 Monolayers with High Electrocatalytic Performance 具有高电催化性能的缺陷 1T-MoS2 单层的纳米溶热合成

IF 13.3 2区材料科学

Small Pub Date : 2025-04-24 DOI: 10.1002/smll.202410087

Yishu Chen, Yuxin Zhang, Deliang Wang, Kexuan Zhao, Wen-Jun Wang, Bogeng Li, Pingwei Liu

{"title":"Nanoconfined Solvothermal Synthesis of Defective 1T-MoS2 Monolayers with High Electrocatalytic Performance","authors":"Yishu Chen, Yuxin Zhang, Deliang Wang, Kexuan Zhao, Wen-Jun Wang, Bogeng Li, Pingwei Liu","doi":"10.1002/smll.202410087","DOIUrl":"https://doi.org/10.1002/smll.202410087","url":null,"abstract":"Synthesizing 2D nanosheets in a controlled and scalable manner remains a significant challenge. Here, a nanoconfined solvothermal synthesis is presented of metallic phase MoS2 (1T-MoS2) monolayers at kilogram scale. The MoS2 nanosheets exhibit a remarkably high monolayer ratio of 97%, a 1T content of ≈89%, and a well-defined average lateral size ranging from ≈100 nm to 1.0 µm, with a narrow size distribution. Moreover, these nanosheets possesses abundant surface defects, and the defect density can be regulated in situ through changing the reaction conditions. Intriguingly, the monolayer MoS2 nanosheets demonstrate good dispersibility and high stability in various solvents, including water, ethylene glycol, dimethyl formamide and others, with a high concentration of up to 1.0 mg mL−1. They are also proven to be high-performance electrocatalysts for the hydrogen evolution reaction, exhibiting an overpotential of 315 mV at an industrial current density of 1000 mA cm−2 and maintaining constant current densities of 500 mA cm−2 for up to 100 h, surpassing the performance of the commercial 20 wt.% Pt/C. Our strategy represents a significant advancement in the controlled synthesis of monolayer MoS2 at scale, providing a promising avenue for the practical application of 2D materials.","PeriodicalId":228,"journal":{"name":"Small","volume":"26 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SiC/SiO2/SnO2 Single Core–shell Nanowire Ultraviolet Photodetector with Radial Heterojunction: A Promising Strategy to Break the Responsivity-Speed Trade-Off 径向异质结SiC/SiO2/SnO2单核-壳纳米线紫外探测器：一种打破响应速度权衡的有希望的策略

IF 13.3 2区材料科学

Small Pub Date : 2025-04-24 DOI: 10.1002/smll.202412618

Baojing Xue, Pan Wang, Hongmei Liu, Zijian Tang, Zhengbo Yan, Ying Su, Bingshe Xu, Liping Ding, Guodong Wei, Yuanhao Wang, Ya Yang

{"title":"SiC/SiO2/SnO2 Single Core–shell Nanowire Ultraviolet Photodetector with Radial Heterojunction: A Promising Strategy to Break the Responsivity-Speed Trade-Off","authors":"Baojing Xue, Pan Wang, Hongmei Liu, Zijian Tang, Zhengbo Yan, Ying Su, Bingshe Xu, Liping Ding, Guodong Wei, Yuanhao Wang, Ya Yang","doi":"10.1002/smll.202412618","DOIUrl":"https://doi.org/10.1002/smll.202412618","url":null,"abstract":"The utilization of a single silicon carbide (SiC) nanostructure-based photodetector (PD) is highly promising for developing MEMS devices, particularly in challenging environments such as high-temperature, high radiation, and corrosive environments. However, achieving a simultaneous improvement in responsivity and response speed is a challenge due to the inherent trade-off between these two parameters resulting from the limitations in light absorption capability and photoelectric transmission efficiency. To overcome this bottleneck, a novel single SiC/SiO2/SnO2 nanowire heterojunction ultraviolet (UV) PD is constructed based on the interface effect, resulting in a responsivity of 38188 A W−1 and rise and decay times of 15 and 10 ms, respectively. The novel core–shell radial heterojunctions not only achieve high light absorption and shorten the distance for photo-generated carriers, ensuring a large optoelectronic gain and fast response time of the device, but also mitigate the individual differences among nanowires. The devices have potential applications in optoelectronic imaging, flame detection, and secure communication fields.","PeriodicalId":228,"journal":{"name":"Small","volume":"36 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revealing the Origin of Property Discrepancy in KNN‐Based Ceramics with Extreme K/Na Ratio for Sensing Application 揭示极端K/Na比KNN基陶瓷在传感应用中性能差异的来源

IF 13.3 2区材料科学

Small Pub Date : 2025-04-24 DOI: 10.1002/smll.202502418

Yi Ding, Zhi Tan, Yongqi Pan, Yu Wang, Yangda Dong, Wenbin Liu, Ting Zheng, Jiagang Wu

{"title":"Revealing the Origin of Property Discrepancy in KNN‐Based Ceramics with Extreme K/Na Ratio for Sensing Application","authors":"Yi Ding, Zhi Tan, Yongqi Pan, Yu Wang, Yangda Dong, Wenbin Liu, Ting Zheng, Jiagang Wu","doi":"10.1002/smll.202502418","DOIUrl":"https://doi.org/10.1002/smll.202502418","url":null,"abstract":"Potassium–sodium niobate (KNN) ceramics are critical lead‐free piezoelectric materials, offering eco‐friendly alternatives with high performance for sustainable sensor applications. However, how to overcome the theoretical framework of conventional K/Na ratio limitation and achieve property enhancement in extreme composition remains to be fully understood. Herein, by combining density function theory calculation, Rayleigh analysis, and ferroelectric scaling behavior, the origin of property discrepancy in KNN‐based ceramics with extreme K/Na ratio is unveiled. Compared with Na‐rich sample, 2.3‐fold enhanced piezoelectricity can be achieved in K‐rich ceramics, superior to those with similar high K concentration. The deteriorated property in Na‐rich sample comes from the existence of in‐phase oxygen octahedron tilting (M2+) mode, suppressing the polar () mode and leading to a higher energy barrier. Nevertheless, the absence of M2+ mode and the multiphase coexistence with a maze‐like domain, promote polarization rotation and domain switching, resulting in improved piezoelectric response in K‐rich ceramics. A compression‐type accelerometer based on KNN with extreme K/Na ratio is designed and the sensitivity of K‐rich ceramics is also much higher than that of Na‐rich ones, highest in reported KNN‐based piezoelectric accelerometers. The study provides a new paradigm to boost electrical properties and reveals the underlying mechanism of property discrepancy induced by extreme K/Na ratio, beneficial to the development of sensor applications.","PeriodicalId":228,"journal":{"name":"Small","volume":"35 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143866653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unlocking the Potential of Disulfidptosis: Nanotechnology-Driven Strategies for Advanced Cancer Therapy 解锁双眼皮下垂的潜力：纳米技术驱动的晚期癌症治疗策略

IF 13.3 2区材料科学

Small Pub Date : 2025-04-24 DOI: 10.1002/smll.202500880

Wenyao Zhen, Tianzhi Zhao, Xiaoyuan Chen, Jingjing Zhang

{"title":"Unlocking the Potential of Disulfidptosis: Nanotechnology-Driven Strategies for Advanced Cancer Therapy","authors":"Wenyao Zhen, Tianzhi Zhao, Xiaoyuan Chen, Jingjing Zhang","doi":"10.1002/smll.202500880","DOIUrl":"https://doi.org/10.1002/smll.202500880","url":null,"abstract":"Tumor tissues exhibit elevated oxidative stress, with the cystine-glutamate transporter xCT solute carrier family 7 member 11 (xCT/SLC7A11) protecting cancer cells from oxidative damage by facilitating cystine uptake for glutathione synthesis. Disulfidptosis, a newly identified form of programmed cell death (PCD), occurs in cells with high xCT/SLC7A11 expression under glucose-deprived conditions. Distinct from other PCD pathways, disulfidptosis is characterized by aberrant disulfide bond formation and cellular dysfunction, ultimately resulting in cancer cell death. This novel mechanism offers remarkable therapeutic potential by targeting the inherent oxidative stress vulnerabilities of rapidly growing cancer cells. Advances in nanotechnology enable the development of nanomaterials capable of inducing reactive oxygen species (ROS) generation, disrupting disulfide bonds. In addition, they are capable to deliver therapeutic agents directly to tumors, thereby improving therapeutic precision and minimizing off-target effects. Moreover, combining disulfidptosis with ROS-induced immunogenic cell death can remodel the tumor microenvironment and enhance anti-tumor immunity. This review explores the mechanisms underlying disulfidptosis, its therapeutic potential in cancer treatment, and the synergistic role of nanotechnology in amplifying its effects. Selective induction of disulfidptosis using nanomaterials represents a promising strategy for achieving more effective, selective, and less toxic cancer therapies.","PeriodicalId":228,"journal":{"name":"Small","volume":"7 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Humidity‐Resistant CeO2/In2O3 Nanocomposite‐Based Chemiresistor for Selective Detection of Formaldehyde 耐湿CeO2/In2O3纳米复合材料基选择性检测甲醛的化学电阻器

IF 13.3 2区材料科学

Small Pub Date : 2025-04-24 DOI: 10.1002/smll.202410023

Ajeet Singh, Brij Mohan, Vijay Pratap, Wei Sun, Armando J. L. Pombeiro, Bal Chandra Yadav

{"title":"Humidity‐Resistant CeO2/In2O3 Nanocomposite‐Based Chemiresistor for Selective Detection of Formaldehyde","authors":"Ajeet Singh, Brij Mohan, Vijay Pratap, Wei Sun, Armando J. L. Pombeiro, Bal Chandra Yadav","doi":"10.1002/smll.202410023","DOIUrl":"https://doi.org/10.1002/smll.202410023","url":null,"abstract":"Formaldehyde is a frequent indoor pollutant that poses a risk to human and environmental health and is suspected to be a carcinogen. However, achieving high sensitivity and selectivity for real‐time applications remains challenging. In this study, a room‐temperature operated formaldehyde chemiresistor is developed by cerium dioxide/indium oxide (CeO2/In2O3) nanocomposite for exclusive detection. The nanocomposite is synthesized using hydrothermal, forming CeO2 nanospheres grown on In2O3 nanocubes. This unique structure enhances the sensing capabilities of CeO2/In2O3, allowing it to detect formaldehyde in the 1–50 ppm range, and a 0.157 ppm detection limit is earned. The sensor exhibits an impressive response of 175.05 at 50 ppm at room temperature and shows responsiveness to various other substances, for instance, methanol, ethanol, aniline, benzene, toluene, acetone, and ammonia. Additionally, the CeO2/In2O3 sensor demonstrated moderate to high selectivity, sensitivity, stability, speedy response/recovery times, and resilience to humidity. This work presents a promising strategy for the detection of formaldehyde.","PeriodicalId":228,"journal":{"name":"Small","volume":"129 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143866654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

d-Orbital Single Electron Filling O─O π* Bonds on WO3S1 Sites for Highly Selective Generation of Hydroxyl Radicals WO3S1位点上d轨道单电子填充O─O π*键的高选择性生成羟基自由基

IF 13.3 2区材料科学

Small Pub Date : 2025-04-24 DOI: 10.1002/smll.202412234

Hui Li, Tianhao Li, Ran Zhao, Hexiang Zhao, Haodong Ji, Fangyuan Chen, Zhurui Shen, Sihui Zhan

{"title":"d-Orbital Single Electron Filling O─O π* Bonds on WO3S1 Sites for Highly Selective Generation of Hydroxyl Radicals","authors":"Hui Li, Tianhao Li, Ran Zhao, Hexiang Zhao, Haodong Ji, Fangyuan Chen, Zhurui Shen, Sihui Zhan","doi":"10.1002/smll.202412234","DOIUrl":"https://doi.org/10.1002/smll.202412234","url":null,"abstract":"Hydroxyl radical (•OH) stemming from dissolved oxygen (O2) via photocatalysis is very attractive, but its poor selectivity and generation efficiency greatly limit its application. Herein, a kind of tungsten single site co-coordinated with O and S atoms (WO3S1) is established on ZnIn2S4 (W-ZIS). The strong interactions in WO3S1 shift the d-band center toward the Fermi level, enhancing the adsorption of O2. These interactions improve the accumulation of photo-generated electrons on WO3S1, facilitating the dissociation of O─O bonds in crucial intermediates and promoting the selective conversion from O2 into •OH. This brings a state-of-the-art selectivity (40.2%) and generation efficiency (1668.90 mmol. g−1. L−1. h−1) of •OH production. Experimental results and theoretical simulations have elucidated that O2 can be reduced by d-orbitals single electron (↑, _, _, _, _, _) of WO3S1 transfer to 2p-orbital O─O pi anti-bonding (π*: px and py), initially activating O2. Additionally, WO3S1 sites facilitate the cleavage of H2O, optimizing proton adsorption through W─O orbital coupling in WO3S1 and promoting the transformation of oxygen-containing intermediates. More importantly, d-orbitals single electron can fill O─O π* bond in •OOH intermediate, weakening the covalency of the O─O bond, mitigating the formation of H2O2 and shortening the pathway for •OH generation.).","PeriodicalId":228,"journal":{"name":"Small","volume":"72 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photoluminescence of Te-Doped Double Perovskite Cs2ZrCl6 Nanocrystals Versus Bulk: Insights From Temperature-Dependent Spectroscopy te掺杂双钙钛矿Cs2ZrCl6纳米晶体与体积的光致发光：来自温度依赖光谱的见解

IF 13.3 2区材料科学

Small Pub Date : 2025-04-24 DOI: 10.1002/smll.202501342

Yang Liu, Ye Wu, Anastasiia Sokolova, Xinmin Shi, Stephen V. Kershaw, Yusheng Wu, Lakshminarayana Polavarapu, Xiaoming Li, Andrey L. Rogach

{"title":"Photoluminescence of Te-Doped Double Perovskite Cs2ZrCl6 Nanocrystals Versus Bulk: Insights From Temperature-Dependent Spectroscopy","authors":"Yang Liu, Ye Wu, Anastasiia Sokolova, Xinmin Shi, Stephen V. Kershaw, Yusheng Wu, Lakshminarayana Polavarapu, Xiaoming Li, Andrey L. Rogach","doi":"10.1002/smll.202501342","DOIUrl":"https://doi.org/10.1002/smll.202501342","url":null,"abstract":"Although bulk crystals of lead-free vacancy-ordered double perovskites demonstrated a highly efficient emission, their nanocrystals (NCs) counterparts exhibit inferior optical performance. To understand the reasons behind this phenomenon, Cs2ZrCl6:Te4+ double perovskite NCs are synthesized, and their optical properties are compared with their bulk powders. Temperature-dependent spectroscopy revealed that the NCs sustain a thermal sensitization of the intermediate trap state, which is located between the self-trapped state of the host (Cs2ZrCl6) and the triplet states of the dopant (Te4+). This opens up a pathway for the non-radiative recombination, and thus decreases the energy transfer efficiency from host to dopant. Importantly, this pathway is suppressed in larger (40 nm) Cs2ZrCl6:Te4+ NCs, resulting in their photoluminescence quantum yield of 24%, as compared to 7% for the 22 nm NCs. Furthermore, the emission spectral range of these double perovskite NCs is shown to extended into near-infrared by incorporating rare-earth ions as additional dopants. The study has established a crucial relation between the optical properties and the size effect in lead-free vacancy-ordered double perovskites and thus lays a foundation for further improvement of their optical performance.","PeriodicalId":228,"journal":{"name":"Small","volume":"69 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Copper-Coordination Engineered Glassy Hydrogels Featuring Ultrastiffness and Structural Programmability 铜配位工程玻璃水凝胶具有超强性和结构可编程性

IF 13.3 2区材料科学

Small Pub Date : 2025-04-24 DOI: 10.1002/smll.202502949

Xiaoting Wang, Ning Tang, Yujia Jiang, Min-Hui Li, Jun Hu

{"title":"Copper-Coordination Engineered Glassy Hydrogels Featuring Ultrastiffness and Structural Programmability","authors":"Xiaoting Wang, Ning Tang, Yujia Jiang, Min-Hui Li, Jun Hu","doi":"10.1002/smll.202502949","DOIUrl":"https://doi.org/10.1002/smll.202502949","url":null,"abstract":"Glassy hydrogels, which maintain a distinctive glassy state at ambient temperature, are appealing for engineering applications. Nevertheless, the existing glassy hydrogels often suffer from inferior strength, inadequate stiffness, and environmental stability caused by weak physical cross-linking. Herein, we present an ultrastiff and ultrastrong glassy hydrogel by introducing robust coordination bonds into a network composed of polyacrylic acid (PAA) and polyvinyl alcohol (PVA), using a copper acetate-assisted strategy. The presence of acetate anions creates a relatively alkaline environment, which deprotonates the carboxyl groups of PAA. This deprotonation exposes carboxylate groups that readily coordinate with copper ions, establishing a densely cross-linked network in the glassy state. The resultant glassy hydrogel exhibits record-breaking Young's modulus (469.7 MPa), tensile strength (19.2 MPa), and exceptional environmental stability. Moreover, the reversible softening and vitrification induced by the breakage and reforming of coordination bonds endows glassy hydrogel with structural programmability, allowing for the construction of integrated auxetic hydrogel (IAH). The IAH demonstrates enhanced mechanical properties compared to the auxetic skeleton alone while maintaining a negative Poisson's ratio over a wide strain range of 0–29%. This study provides a promising engineering route for the development of advanced glassy hydrogels.","PeriodicalId":228,"journal":{"name":"Small","volume":"72 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Small最新文献