IF 13 2区材料科学

Small Pub Date : 2024-12-19 DOI: 10.1002/smll.202470384

Ben McLean, Irene Yarovsky

引用次数: 0

Customized Ultrathin Oxygen Vacancy-Rich Bi2W0.2Mo0.8O6 Nanosheets Enabling a Stepwise Charge Separation Relay and Exposure of Lewis Acid Sites toward Broad-Spectrum Photothermal Catalysis (Small 51/2024)

IF 13 2区材料科学

Small Pub Date : 2024-12-19 DOI: 10.1002/smll.202470381

Jiayu Yi, Xin Yang, Lijuan Shen, Hun Xue, Min-Quan Yang, Qingrong Qian

引用次数: 0

Plasmonic MOF for Highly Selective SERS Sensing of Trace Mercury (II) in Complex Matrices

IF 13.3 2区材料科学

Small Pub Date : 2024-12-19 DOI: 10.1002/smll.202409988

Zhijian He, Jieyin Hu, Jing Zhong, Yunchen Long, Junda Shen, Song Chen, Weihui Ou, Qiyu Liu, Jian Lu, Zaizhu Lou, Yang Yang Li, Jun He

{"title":"Plasmonic MOF for Highly Selective SERS Sensing of Trace Mercury (II) in Complex Matrices","authors":"Zhijian He, Jieyin Hu, Jing Zhong, Yunchen Long, Junda Shen, Song Chen, Weihui Ou, Qiyu Liu, Jian Lu, Zaizhu Lou, Yang Yang Li, Jun He","doi":"10.1002/smll.202409988","DOIUrl":"https://doi.org/10.1002/smll.202409988","url":null,"abstract":"Developing Ag-based surface-enhanced Raman spectroscopy (SERS) sensors for detecting Hg(II) has garnered significant research interest due to their unparalleled selectivity, which is brought by the specific Ag-Hg amalgamation reaction. However, existing sensors perform unsatisfactorily in the trace detection of Hg(II) because the low concentration of Hg(II) does not have the redox potential sufficient to amalgamate with Ag. To address this challenge, a plasmonic MOF SERS sensor is developed, nanoetched Ag@UiO-68-SMe, by integrating the enormous Raman enhancement effects of nanoetched Ag with the selective enrichment function of UiO-68-SMe into single entity. This sensor enables on-site readout of Hg(II) in various real-world samples with high selectivity and sensitivity (0.17 ppb) using a portable Raman spectrometer coupled with a homemade 3D print holder. Mechanistic studies reveal that the UiO-68-SMe selectively captures and concentrates trace amounts of Hg(II) through thiomethyl groups, significantly increasing their redox potential. The resultant higher oxidative capacity allows for the spontaneous Ag-Hg amalgamation, inducing a SERS turn-off response to Hg(II), which is otherwise thermodynamically prohibited. This work not only reports a powerful SERS sensor for monitoring trace levels of Hg(II) pollution but also offers a proof-of-concept demonstration of utilizing the enrichment capabilities of MOF to manipulate redox reaction.","PeriodicalId":228,"journal":{"name":"Small","volume":"30 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857588","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

Synergic Cellulose Nanofiber/Tourmaline Nanoparticle–Assembled Layered Piezoelectric Cryogels for High-Performance Airborne Particulate Filtration

IF 13.3 2区材料科学

Small Pub Date : 2024-12-19 DOI: 10.1002/smll.202409157

Chao Lyu, Ossi Laitinen, Mian Zhu, Pengze Li, Ruiqing Shen, Terhi Suopajärvi, Xiaotong Zhou, Chenming Liu, Xiaoyu Li, Faguang Yang, Jingxian Liu, Henrikki Liimatainen

{"title":"Synergic Cellulose Nanofiber/Tourmaline Nanoparticle–Assembled Layered Piezoelectric Cryogels for High-Performance Airborne Particulate Filtration","authors":"Chao Lyu, Ossi Laitinen, Mian Zhu, Pengze Li, Ruiqing Shen, Terhi Suopajärvi, Xiaotong Zhou, Chenming Liu, Xiaoyu Li, Faguang Yang, Jingxian Liu, Henrikki Liimatainen","doi":"10.1002/smll.202409157","DOIUrl":"https://doi.org/10.1002/smll.202409157","url":null,"abstract":"Here, hybrid stimuli-responsive (exhibiting pyroelectricity and piezoelectricity) porous cryogels are engineered by embedding tourmaline nanoparticles (TNs) in a cellulose nanofiber (CNF) skeleton to generate high-performance CNF–TN-based airborne particulate matter (PM) filters. First, single-layer hybrid cryogels with varying TN contents (0–5% w v−1) are assembled, and the design principles for multilayered filters are established based on a novel sequential pre-freezing and freeze-drying technique. As observed, the embedded TNs transformed the CNF network into a more homogeneous, isotropic, and firm structure, thus improving the structural integrity and thermal stability of the assembled cryogels while maintaining their ultrahigh porosity and low density. The TN induced piezoelectric voltage in the cryogels during filtration significantly enhanced the filtration performance. Furthermore, the patterned surface texture of the cryogels notably improved quality factor (Qf) and the reusability of the layered filters overall. The explored hybrid cryogels, particularly those exhibiting multilayered configurations, can be deployed for high-performance airborne particulates filtration owing to the synergistic effect of their mechanical robustness, stability, and high filtration efficiency. As far as it is known that, the Qf values (>0.04) obtained by the three-layered cryogels are similar to or even higher than those of the reported best aerosol filters.","PeriodicalId":228,"journal":{"name":"Small","volume":"55 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857586","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

Structural Evolution of Manganese Prussian Blue Analogue in Aqueous ZnSO4 Electrolyte (Small 51/2024)

IF 13 2区材料科学

Small Pub Date : 2024-12-19 DOI: 10.1002/smll.202470382

Min Li, Mariam Maisuradze, Angelo Mullaliu, Ilaria Carlomagno, Giuliana Aquilanti, Jasper Rikkert Plaisier, Marco Giorgetti

引用次数: 0

High-Yield Production of High-κ/Metal Gate Nanopattern Array for 2D Devices via Oxidation-Assisted Etching Approach (Small 51/2024)

IF 13 2区材料科学

Small Pub Date : 2024-12-19 DOI: 10.1002/smll.202470378

Weida Hong, Jiejun Zhang, Daobing Zeng, Chen Wang, Zhongying Xue, Miao Zhang, Ziao Tian, Zengfeng Di

引用次数: 0

Multifunctional Optimization of MXene for Enhanced Comprehensive Performance of Crystal Silicon-MXene Back-Heterojunction Solar Cells

IF 13.3 2区材料科学

Small Pub Date : 2024-12-19 DOI: 10.1002/smll.202410160

Xiaoyang Liu, Hongbo Tong, Yali Li, Wenxuan Li, Guodong Wan, Qiming Liu, Yujun Fu, Deyan He, Zhenguo Li, Junshuai Li

{"title":"Multifunctional Optimization of MXene for Enhanced Comprehensive Performance of Crystal Silicon-MXene Back-Heterojunction Solar Cells","authors":"Xiaoyang Liu, Hongbo Tong, Yali Li, Wenxuan Li, Guodong Wan, Qiming Liu, Yujun Fu, Deyan He, Zhenguo Li, Junshuai Li","doi":"10.1002/smll.202410160","DOIUrl":"https://doi.org/10.1002/smll.202410160","url":null,"abstract":"Enhancing the cost-performance ratio is a fundamental objective for the advancement of the photovoltaic sector. In this context, the development of innovative solar cells that offer a straightforward device configuration but high performance is arguably the most crucial element. Herein, an undoped back-heterojunction crystalline silicon (c-Si) solar cell is endeavored to be crafted by simply drop-casting a Ti3C2Tx MXene ethanol colloidal solution onto the backside of an n-type c-Si (n-Si) wafer. Leveraging the good electrical property and stability, as well as the adjustable work function of MXene treated by europium trifluoromethanesulfonate (Eu(OTF)3), the elementary Ag/ZnO/n-Si/MXene/Ag solar cell delivers an impressive power conversion efficiency (PCE) of 12.5%. Moreover, the deposition of a SiO2 passivation layer through a simple self-developed electrochemical method increases the PCE further to 13.5% by ameliorating the interfacial contact between MXene and n-Si. Moreover, this unencapsulated solar cell exhibits improved stability, compared to the control device without Eu(OTF)3 treatment and SiO2 passivation.","PeriodicalId":228,"journal":{"name":"Small","volume":"75 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857596","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

Hole-Transport-Layer-Free Organic Solar Cells with Enhanced Efficiency Upon Halogenated Solvent Treatment

IF 13.3 2区材料科学

Small Pub Date : 2024-12-19 DOI: 10.1002/smll.202406773

Weiwei Wu, Pengru Huang, Yuan Gao, Ji Wan, Rui Sun, Jie Min

{"title":"Hole-Transport-Layer-Free Organic Solar Cells with Enhanced Efficiency Upon Halogenated Solvent Treatment","authors":"Weiwei Wu, Pengru Huang, Yuan Gao, Ji Wan, Rui Sun, Jie Min","doi":"10.1002/smll.202406773","DOIUrl":"https://doi.org/10.1002/smll.202406773","url":null,"abstract":"Typical PEDOT:PSS hole-transporting layers frequently present some issues, including mismatched energy levels, high acidity, severe hygroscopicity, etc., all of which significantly weaken device performance. Herein, an approach of halogenated solvent treatment to modulate the physical properties of indium tin oxide (ITO) substrates is employed. Four halogenated-ITO anodes (named ITO-F, ITO-Cl, ITO-Br and ITO-I) are achieved by ITO substrates immersed in hydrogen peroxide co-solvents mixed with 1,2-difluorobenzene, 1,2-dichlorobenzene, 1,2-dibromobenzene and 1,2-diiodobenzene, respectively, and upon UV illumination. The work functions of the ITO-F/Cl/Br/I anodes increase from 4.63 eV for ITO to 5.30, 5.32, 5.24, and 5.28 eV, respectively, which are close to 5.22 eV for ITO/PEDOT:PSS. Additionally, the investigated PM6:L8-BO:BTP-eC9 devices based on various anodes showed power conversion efficiencies (PCEs) of 17.81% for ITO-F, 19.48% for ITO-Cl, 17.05% for ITO-Br, 17.34% for ITO-I and 18.70% for ITO/PEDOT:PSS, respectively. In particular, a comprehensive experimental analysis is conducted to establish connections between theoretical calculations, blend morphology and physical dynamics, and further elucidate the factors that cause differences in device efficiencies. This work manifests the advantages of the proposed halogenated ITO for realizing highly efficient organic photovoltaics.","PeriodicalId":228,"journal":{"name":"Small","volume":"55 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857665","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

Hydrodynamics and Aggregation of Nanoparticles with Protein Corona: Effects of Protein Concentration and Ionic Strength (Small 51/2024)

IF 13 2区材料科学

Small Pub Date : 2024-12-19 DOI: 10.1002/smll.202470377

Hwankyu Lee

引用次数: 0

Phase Stability of High Entropy (Mg,Ni,Co,Cu,Zn)O from Temperature-Resolved Synchrotron Diffraction: Tetragonal Distortion and Guggenite Phase

IF 13.3 2区材料科学

Small Pub Date : 2024-12-19 DOI: 10.1002/smll.202406634

Mauro Coduri, Martina Fracchia, Stefano Checchia, Maela Manzoli, Catherine Dejoie, Paolo Ghigna, Umberto Anselmi-Tamburini

{"title":"Phase Stability of High Entropy (Mg,Ni,Co,Cu,Zn)O from Temperature-Resolved Synchrotron Diffraction: Tetragonal Distortion and Guggenite Phase","authors":"Mauro Coduri, Martina Fracchia, Stefano Checchia, Maela Manzoli, Catherine Dejoie, Paolo Ghigna, Umberto Anselmi-Tamburini","doi":"10.1002/smll.202406634","DOIUrl":"https://doi.org/10.1002/smll.202406634","url":null,"abstract":"The temperature-resolved structure evolution of quinary and quaternary equimolar oxides containing Mg, Ni, Zn, Co, and Cu is investigated by in situ synchrotron diffraction. Important structural modifications occur already at mild temperatures and depend on the elements involved. All quaternary compounds with χ(Cu) = 0.25 within 250–500 °C show a tetragonal phase. The fraction of Cu dictates the degree of the tetragonal distortion: for χ(Cu) = 0.20 only local distortions are observed, which do not occur in the absence of Cu. Further heating restores the original cubic phase, followed by the segregation of other phases, which depend on the elements available. In the presence of both Cu and Mg, the segregation of guggenite is observed, a phase with a cation connectivity similar to the cubic high entropy oxide, but with a suitable coordination environment for Cu atoms by allowing strong elongation of octahedra. Guggenite acts as a buffer layer facilitating the gradual diffusion of Cu2+ from the cubic high entropy oxide to tenorite. To conclude, it is demonstrated for the first time that the demixing of the prototypal high entropy oxide does not involve just tenorite or binary oxides, it is rather mediated by the formation of guggenite.","PeriodicalId":228,"journal":{"name":"Small","volume":"90 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857590","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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