IF 13.3 2区材料科学

Small Pub Date : 2025-09-15 DOI: 10.1002/smll.202506654

Xuejie Wang,Zhuang Du,Jianhui Zhong,Zicheng Gao,Jiaguo Yu,Tao Liu

{"title":"Tailoring MoTe2/C Heterostructures With Dual Regulation of Porosity and Carbon Content for High-Rate and Long-Cycling Potassium-Ion Storage.","authors":"Xuejie Wang,Zhuang Du,Jianhui Zhong,Zicheng Gao,Jiaguo Yu,Tao Liu","doi":"10.1002/smll.202506654","DOIUrl":"https://doi.org/10.1002/smll.202506654","url":null,"abstract":"Molybdenum telluride (MoTe2) with expanded interlayer spacing facilitates rapid K⁺ insertion/extraction, enabling potassium ion batteries (PIBs) to be a potential anode material of great prospect. However, significant volume expansion and sluggish K⁺ diffusion limit its electrochemical performance. To overcome these challenges, we developed MoTe2/C composites with a unique flower-globular morphology by precisely tuning the chelation ratio between Mo and dopamine. Among the synthesized materials, MoTe2/C-11, featuring a 36.3% moderate carbon content and an optimized pore size distribution (4-10 nm), exhibits outstanding rate performance (108 mAh g-1 at 5 A g-1) and exceptional cycling stability, retaining 93.6% of its capacity after 3000 cycles at 3 A g-1. Of particular significance is the discovery that the relationship between carbon content and pore structure in the material is a key factor for achieving high-performance batteries. The resulting improvement in electrochemical kinetics is analyzed, and the dynamic mechanisms involved in potassium storage are examined. This study underscores the critical role of chelation engineering in optimizing anode materials and offers a scalable strategy for developing next-generation high-performance PIBs and other alkali metal-based energy storage systems.","PeriodicalId":228,"journal":{"name":"Small","volume":"22 1","pages":"e06654"},"PeriodicalIF":13.3,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059098","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

Monitoring Spatiotemporal Dynamics of Extracellular pH in Breast Tumor Spheroid and Tissue by SERS Microsensors. 用SERS微传感器监测乳腺肿瘤球体和组织细胞外pH的时空动态。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-15 DOI: 10.1002/smll.202506809

Zedong Zhang,Chunyan An,Jianguo Dong,Xuyu Zhang,Tianyu Shen,Dekun Wang,Xue Mi,Shijing Yue,Xiaoyue Tan,Yuying Zhang

{"title":"Monitoring Spatiotemporal Dynamics of Extracellular pH in Breast Tumor Spheroid and Tissue by SERS Microsensors.","authors":"Zedong Zhang,Chunyan An,Jianguo Dong,Xuyu Zhang,Tianyu Shen,Dekun Wang,Xue Mi,Shijing Yue,Xiaoyue Tan,Yuying Zhang","doi":"10.1002/smll.202506809","DOIUrl":"https://doi.org/10.1002/smll.202506809","url":null,"abstract":"Extracellular pH (pHe) acidification is a hallmark of solid tumors, linked to cancer initiation, progression, and drug resistance. Non-invasive monitoring of pHe spatiotemporal dynamics during cancer growth and in response to drug is crucial for understanding cancer mechanisms and developing novel therapeutic strategies. Here, a micro-sized pH sensor is developed by encapsulating Au@Ag@MBA nanosensors within biocompatible agarose hydrogel microspheres. These Aga microsensors in a size range of 3-10 µm, may avoid cellular endocytosis and stably reside in the extracellular environment. pHe dynamics are monitored via surface-enhanced Raman scattering (SERS) mapping in tumor spheroids and solid tumor tissues over 7 and 25-day periods, respectively. Distinct pH gradients are observed between the outer and core regions of the tumor spheroid, which evolved over time and are disrupted by doxorubicin treatment. In vivo, a decrease of average tumor pHe from ≈6.2 to ≈5.5 is observed with tumor progression, and doxorubicin administration resulted in a pHe elevation of ≈0.6 units. This microsensor-based SERS sensing approach provides a facile method for long-term monitoring of spatiotemporal dynamics within the disease microenvironment.","PeriodicalId":228,"journal":{"name":"Small","volume":"24 1","pages":"e06809"},"PeriodicalIF":13.3,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059100","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

Synergistic and Competing Effects of Iron in TiVNbCr-Based High-Entropy Alloys for Reversible Hydrogen Storage. 铁在tivnbcr基高熵合金可逆储氢中的协同与竞争效应。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-15 DOI: 10.1002/smll.202508310

Bo Cheng,Bang Dou,Lingjie Kong,Di Wan,Yunfei Xue

引用次数: 0

Atomistic and Oxophilic Ce Raises the Inertia of CO Intermediates Toward Enhanced Electrocatalytic Methanation. 原子性和亲氧性Ce提高CO中间体的惯性，以增强电催化甲烷化。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-15 DOI: 10.1002/smll.202506545

Zhangyi Zheng,Xingyi Zhan,Le Wei,Jian Cheng,Wei Hua,Mutian Ma,Qianqian Bai,Xinyu Zhang,Yanzhi Zhang,Daqi Song,Tong Zhou,Zhichen Zhou,Huan Wang,Xiaoxing Ke,Wanjian Yin,Zhe Sun,Feng Yan,Zhao Deng,Yang Peng

{"title":"Atomistic and Oxophilic Ce Raises the Inertia of CO Intermediates Toward Enhanced Electrocatalytic Methanation.","authors":"Zhangyi Zheng,Xingyi Zhan,Le Wei,Jian Cheng,Wei Hua,Mutian Ma,Qianqian Bai,Xinyu Zhang,Yanzhi Zhang,Daqi Song,Tong Zhou,Zhichen Zhou,Huan Wang,Xiaoxing Ke,Wanjian Yin,Zhe Sun,Feng Yan,Zhao Deng,Yang Peng","doi":"10.1002/smll.202506545","DOIUrl":"https://doi.org/10.1002/smll.202506545","url":null,"abstract":"Selective and stable methane production via electrocatalytic CO2 reduction (eCO2R) utilizing membrane electrode assembly (MEA) has been challenging, requiring a delicate balance of surface coverage and binding energy among intermediates such as *CO and *H. This study addresses these challenges by doping oxophilic cerium (Ce) into a copper (Cu) matrix through thermal co-evaporation, creating atomistic CeOχ-Cuδ+ domains to promote bridged adsorption of *CO while pumping up the proton supply through enhanced water dissociation. The high inertia of *CObridge, as co-stabilized by *OH, and the high proton availability, effectively inhibit C─C coupling while prompting intermediates hydrogenation, ultimately leading to improved methane production. The optimized Ce2%Oχ-Cu catalyst achieves an unprecedented stability in MEA operation for over 210 h with an average methane selectivity above 50%. This work offers profound understanding on synergistically tuning intermediates binding and water dissociation through oxophilic rare-earth doping to steer the eCO2R pathway.","PeriodicalId":228,"journal":{"name":"Small","volume":"16 1","pages":"e06545"},"PeriodicalIF":13.3,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145058922","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

Selective Activation of Dynamics in Kinetically Frozen Supramolecular Polymer Bottlebrush Assemblies. 动态冻结的超分子聚合物瓶刷组件动力学的选择性激活。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-15 DOI: 10.1002/smll.202505481

Hans F Ulrich,Tobias Klein,Ziliang Zhao,Zoltán Cseresnyés,Pablo Carravilla,Ruman Gerst,Alina Kasberg,Frederic P Scharfenberg,Marc Thilo Figge,Christian Eggeling,Johannes C Brendel

{"title":"Selective Activation of Dynamics in Kinetically Frozen Supramolecular Polymer Bottlebrush Assemblies.","authors":"Hans F Ulrich,Tobias Klein,Ziliang Zhao,Zoltán Cseresnyés,Pablo Carravilla,Ruman Gerst,Alina Kasberg,Frederic P Scharfenberg,Marc Thilo Figge,Christian Eggeling,Johannes C Brendel","doi":"10.1002/smll.202505481","DOIUrl":"https://doi.org/10.1002/smll.202505481","url":null,"abstract":"Supramolecular assemblies are typically characterized by their dynamic nature due to the comparable weak non-covalent interactions. While these properties confer adaptability, stability issues may limit application in areas such as drug delivery or tissue engineering. Here, supramolecular assemblies of amphiphilic polymers containing benzenetrispeptide and benzenetrisureas motifs are inherently stable and non-dynamic at ambient conditions is shown, but dynamic exchange can be selectively activated. Stimulated emission depletion microscopy combined with automated image analysis revealed no dynamic exchange between complementary labeled fibers independent of the length of the hydrophobic domains at ambient conditions in pure water for several days. Competitive solvent addition facilitates dynamic exchange but compromises stability. Raising the temperature of the samples in pure water to 60 °C, however, induces similar dynamics while fiber stability is maintained. The amphiphilic character, in combination with the strong hydrogen bonds, seems to endow these supramolecular polymer brushes with unique switchable dynamics.","PeriodicalId":228,"journal":{"name":"Small","volume":"34 1","pages":"e05481"},"PeriodicalIF":13.3,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145058925","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

Oxygen Vacancy Engineering Induced by Binary Metal Ions Pre-Intercalation to Realize Stable Na+ Storage at High Voltage. 二元金属离子预插诱导氧空位工程实现高压稳定Na+存储。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-15 DOI: 10.1002/smll.202509279

Haofei Yang,Wenbin Li,Qi Dong,Jianhua Zhang,Qinting Jiang,Jiaxuan Zuo,Mengjiao Li,Jing Wang,Yangyang Luo,Xuexia Song,Jingjing Wang,Shulei Chou,Xifei Li

{"title":"Oxygen Vacancy Engineering Induced by Binary Metal Ions Pre-Intercalation to Realize Stable Na+ Storage at High Voltage.","authors":"Haofei Yang,Wenbin Li,Qi Dong,Jianhua Zhang,Qinting Jiang,Jiaxuan Zuo,Mengjiao Li,Jing Wang,Yangyang Luo,Xuexia Song,Jingjing Wang,Shulei Chou,Xifei Li","doi":"10.1002/smll.202509279","DOIUrl":"https://doi.org/10.1002/smll.202509279","url":null,"abstract":"Oxygen vacancy (Vo) engineering is an important lattice modification strategy to achieve the balance between Na+ storage number and lattice stability of layered oxide cathodes. However, the as-reported Vo regulation strategies usually present poor modulation accuracy, which would be detrimental to achieve better balance. Herein, the binary metal ions pre-intercalation strategy is developed, where the differentiated coordination capabilities between interlayer metal ions and oxygen atoms are cleverly employed to realize the fine regulation of Vo content. Further, taking new layered HNaV6O16·4H2O sodium-ion battery cathode as an example, the fine regulation of the relative Vo content is achieved by utilizing the coordination number difference of CoO4 and NiO5 polyhedron constituted by pre-intercalating Co2+ and Ni2+. Thus, the excellent balance between specific capacity and cycling stability is realized by enhancing Na+ storage at high voltage, where a capacity of 93.3 mAh g-1 and retention rate of 76% after 200 cycles at 990 mA g-1 are obtained. It is also revealed that Vo can be used as a descriptor for capacity contribution and Na+ diffusion coefficient at high voltage, which describe an approximative volcano curve and are more sensitive to the Vo content in the neighborhood of 2.0.","PeriodicalId":228,"journal":{"name":"Small","volume":"52 1","pages":"e09279"},"PeriodicalIF":13.3,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145058991","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

Tailored Ionic Electronic Hybrid Porous Conductors for Ultrasensitive Flexible Chemical Sensor. 用于超灵敏柔性化学传感器的定制离子电子混合多孔导体。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-15 DOI: 10.1002/smll.202505841

Liqiong Zhang,Chenshuang Pan,Menghao Yang,Li Li,Gonghai Yang,Chonghao Xiong,Zhiying Deng,Jiaying Yun,Yidong Zou,Jia Huang

{"title":"Tailored Ionic Electronic Hybrid Porous Conductors for Ultrasensitive Flexible Chemical Sensor.","authors":"Liqiong Zhang,Chenshuang Pan,Menghao Yang,Li Li,Gonghai Yang,Chonghao Xiong,Zhiying Deng,Jiaying Yun,Yidong Zou,Jia Huang","doi":"10.1002/smll.202505841","DOIUrl":"https://doi.org/10.1002/smll.202505841","url":null,"abstract":"The rapid rise of artificial intelligence and the Industrial Internet of Things has brought new opportunities for developing flexible intelligent gas sensors. Ammonium hydroxide, as an important industrial and food processing raw material, can pose a great threat to human health and the ecological environment. In addition, the NH3 detection together with high humidity is of great significance for the clinical diagnosis of patients' exhaled gas (e.g., asthma and nephropathy). Herein, novel mixed ionic-electronic conductors (MIECs) with porous structure have been in situ synthesized based on ionic conductive metal-organic framework (Zn3(HITP)2) (HITP = 2,3,6,7,10,11-hexaiminotriphenylene) and electronic conductive π-conjugated polymer (N-alkyl-diketopyrrolo-pyrroledithienylthieno[3,2-b]thiophene, DPP-DTT) through a facile liquid-liquid interface self-assembly strategy. The tailored Zn3(HITP)2/DPP-DTT sensor exhibits excellent sensing performance toward ammonium hydroxide without heating, including unique selectivity, high sensitivity, rapid response speed, low detectable limit (ca. 200 ppb), low theoretical limit of detection (LOD) (2.3 ppb), and more interestingly, ultra-low operation voltage (down to 30 mV) owing to its unique electron-ion coupling and synergistic effects. Interestingly, the sensor can even detect NH3 gas under ultrahigh humidity (95%), and it also exhibits dual-functional sensing potential to recognize ammonium hydroxide and NH3 molecules. As a demonstration, miniaturized and flexible sensors are integrated into a portable device wirelessly linked with a smartphone for real-time monitoring. Density functional theory (DFT) calculations confirm that the junction films have high adsorption energy toward NH3 molecules in the existence of H2O molecules, implying the strong adsorption interaction between host and guest molecules. This MIECs-sensing material provides a new candidate for ultrasensitive intelligent flexible gas sensors.","PeriodicalId":228,"journal":{"name":"Small","volume":"76 1","pages":"e05841"},"PeriodicalIF":13.3,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059060","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

Achieving Low-Power Analog Resistive Switching in Filamentary Memristive Devices for Energy-Efficient Analog In-Memory Computing. 在纤维记忆器件中实现低功耗模拟电阻开关以实现高能效内存模拟计算。

IF 13.3 2区材料科学

Small Pub Date : 2025-09-15 DOI: 10.1002/smll.202505708

Jaehyun Kang,Sungmin Lee,Taeyoon Kim,Suman Hu,Suyoun Lee,Kyeong-Seok Lee,Jong Keuk Park,Inho Kim,Gyu Weon Hwang,Sangbum Kim,YeonJoo Jeong

{"title":"Achieving Low-Power Analog Resistive Switching in Filamentary Memristive Devices for Energy-Efficient Analog In-Memory Computing.","authors":"Jaehyun Kang,Sungmin Lee,Taeyoon Kim,Suman Hu,Suyoun Lee,Kyeong-Seok Lee,Jong Keuk Park,Inho Kim,Gyu Weon Hwang,Sangbum Kim,YeonJoo Jeong","doi":"10.1002/smll.202505708","DOIUrl":"https://doi.org/10.1002/smll.202505708","url":null,"abstract":"Analog in-memory computing with memristive devices is a promising solution for overcoming energy inefficiencies of traditional Von Neumann architectures, especially in deep learning applications. However, filamentary memristive devices encounter significant challenges, such as high forming and set voltages and limited resistance in analog switching regions, causing excessive power consumption. Here, an engineering strategy is presented that reduces operational voltage by addressing ionic supply bottlenecks and lowers analog switching current using a dual-matrix filamentary switching approach. GeSe2 is utilized as a high-mobility matrix and densified amorphous silicon as a low-mobility matrix, along with Ag and Pt nano-cluster layers for dual-matrix devices. Experimental results show over a 50% reduction in both forming and set voltages and more than a 96% decrease in reset current compared to pristine devices. Moreover, the proposed devices exhibit a 93% reduction in analog energy consumption (0.98 pJ) compared to pristine devices, stable retention for ≈24 h, and endurance for ≈50k cycles. Furthermore, simulations on the Spiking-VGG9 architecture, employing quantization-aware training and the tiki-taka method in the resistive processing unit framework, demonstrate accuracies of 89.38% for CIFAR10 and 63.70% for CIFAR10-DVS while concurrently reducing total energy consumption by 60.42% relative to pristine devices.","PeriodicalId":228,"journal":{"name":"Small","volume":"36 1","pages":"e05708"},"PeriodicalIF":13.3,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059099","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

Synchronized Monomer Kinetics Govern Ionic Nanorod Growth and Uncover Superlattice 同步单体动力学控制离子纳米棒生长和揭示超晶格

IF 13.3 2区材料科学

Small Pub Date : 2025-09-12 DOI: 10.1002/smll.202508330

Amjd Mohammed Hamed Nijy Al‐Muraisy, Behroz Khan, Xin Guan, Bin Wang

引用次数: 0

Switchable Exchange Bias Resulting From Correlated Domain Structures in Orthogonally Coupled Antiferromagnet/Ferromagnet van der Waals Heterostructures. 正交耦合反铁磁体/铁磁体范德华异质结构中相关畴结构引起的可切换交换偏置。

IF 12.1 2区材料科学

Small Pub Date : 2025-09-12 DOI: 10.1002/smll.202506284

Aditya Kumar, Sadeed Hameed, Thibaud Denneulin, Aravind Puthirath Balan, Joseph Vas, Kilian Leutner, Lei Gao, Olena Gomonay, Jairo Sinova, Rafal E Dunin-Borkowski, Mathias Kläui

{"title":"Switchable Exchange Bias Resulting From Correlated Domain Structures in Orthogonally Coupled Antiferromagnet/Ferromagnet van der Waals Heterostructures.","authors":"Aditya Kumar, Sadeed Hameed, Thibaud Denneulin, Aravind Puthirath Balan, Joseph Vas, Kilian Leutner, Lei Gao, Olena Gomonay, Jairo Sinova, Rafal E Dunin-Borkowski, Mathias Kläui","doi":"10.1002/smll.202506284","DOIUrl":"https://doi.org/10.1002/smll.202506284","url":null,"abstract":"Van der Waals (vdW) magnetic heterostructures offer a versatile platform for engineering interfacial spin interactions with atomic precision, enabling nontrivial spin textures and dynamics behavior. In this work, robust asymmetric magnetization reversal and exchange bias are reported in Fe3GeTe2 (FGT), driven by interlayer exchange coupling with the A-type antiferromagnet CrSBr. Despite the orthogonal magnetic anisotropies-out-of-plane easy axis in FGT and in-plane in CrSBr-a strong interfacial exchange interaction that gives rise to pronounced and switchable exchange bias and asymmetric switching in FGT is observed, persisting up to the Néel temperature of CrSBr (∼132 K) as revealed by anomalous Hall effect measurements. The microscopic origin of this behavior is uncovered through cross-sectional magnetic imaging of the domain structure using off-axis electron holography. The results reveal that the asymmetric switching and exchange bias arise from the influence of CrSBr on the domain configuration of FGT, where the in-plane antiferromagnetic state of CrSBr promotes the formation of stripe-like domain structures in FGT with circular rotation of magnetization in the cross-sectional bc plane defined by the easy axes of both FGT and CrSBr. These findings elucidate the mechanism of exchange bias in orthogonally coupled vdW systems and demonstrate a pathway for stabilizing 3D domain structures in ferromagnets through interfacial exchange interactions.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e06284"},"PeriodicalIF":12.1,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145038748","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

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