IF 12.1 2区材料科学

Small Pub Date : 2026-05-06 DOI: 10.1002/smll.73658

Xuan Zhang, Hongbo Tai, Xueling Wang, Jiaqi Lu, Chunying Zheng, Zhiliang Liu

{"title":"MOF-on-MOF-Derived CeO2/Fe@C Composites for Tunable Low-Frequency Electromagnetic Wave Absorption.","authors":"Xuan Zhang, Hongbo Tai, Xueling Wang, Jiaqi Lu, Chunying Zheng, Zhiliang Liu","doi":"10.1002/smll.73658","DOIUrl":"https://doi.org/10.1002/smll.73658","url":null,"abstract":"The rational design of electromagnetic wave (EMW) absorbing materials within the low-frequency range of 2-8 GHz has significant importance. However, achieving controlled low-frequency migration of electromagnetic materials absorption windows remains challenging. In this study, a MOF-on-MOF precursor (UiO-66@MIL-88B) is constructed via an in situ growth strategy and converted into CeO2/Fe@C (CFC) composites by temperature-programmed pyrolysis, enabling the shift of the absorption window toward lower frequencies. The optimized CFC-2 exhibits excellent low-frequency EMW absorption performance: the minimum reflection loss (RLmin) is -62.20 dB at 7.84 GHz, and the effective absorption bandwidth (EAB) is 5.36 GHz at an ultrathin thickness of 1.70 mm. Notably, increasing the pyrolysis temperature enhances CeO2 crystallinity and shifts the optimal absorption to lower frequencies, where CFC-3 achieves -42.54 dB at 4.00 GHz. In contrast, Fe@C and CeO2@C show markedly inferior low-frequency performance. Systematic investigation reveals that the CFC composites with abundant interfaces (Fe/CeO2, CeO2/C, and Fe/C), defect-rich carbon, and oxygen vacancies. Multi-scale interfacial polarization, coupled with magnetic loss from Fe nanoparticles, balances dielectric/magnetic losses, improves impedance matching, and enhances attenuation. This work provides a novel strategy for low-frequency EMW absorbers by integrating MOF-on-MOF-derived architectures with temperature-programmed regulation.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73658"},"PeriodicalIF":12.1,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831648","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

Quasi-BIC and Reflective Mode Coupling Drives SHG Beyond the Q Factor Limit. 准bic和反射模式耦合驱动SHG超越Q因子极限。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-06 DOI: 10.1002/smll.73516

Wenkai Yang, Hao Qin, Boqing Liu, Chuanyu Wang, Yilin Tang, Jiri Janousek, Xueqian Sun, Alex Y Song, Yuerui Lu

{"title":"Quasi-BIC and Reflective Mode Coupling Drives SHG Beyond the Q Factor Limit.","authors":"Wenkai Yang, Hao Qin, Boqing Liu, Chuanyu Wang, Yilin Tang, Jiri Janousek, Xueqian Sun, Alex Y Song, Yuerui Lu","doi":"10.1002/smll.73516","DOIUrl":"https://doi.org/10.1002/smll.73516","url":null,"abstract":"Second harmonic generation (SHG) is a widely used nonlinear optical process for frequency conversion and quantum information processing. However, existing approaches to enhance SHG in metasurfaces that are based on quasi-bound state in the continuum (quasi-BIC) resonances are often constrained by the limited second-order nonlinear susceptibilities of materials and the practical challenge of achieving high quality (Q) factors. Here, an alternative strategy is proposed to enhance SHG by increasing the absorptance (A) at the quasi-BIC resonance. Using temporal coupled mode theory (TCMT), an analytical expression is derived to link SHG intensity with both the resonance Q factor and absorptance, showing that strong SHG can be achieved even with finite Q when absorptance is properly optimized. To validate this concept, a 3R phase of molybdenum disulfide (3R-MoS2) metasurface is designed and fabricated by spectrally aligning a reflective resonance with a transmitted quasi-BIC mode, thereby enhancing absorptance at the target wavelength. The metasurface exhibits an SHG conversion efficiency of ∼3 × 10-5 at 9 GW cm-2, corresponding to more than 40-fold enhancement over an unpatterned flake. Despite the reduced damage threshold, the experimental results agree well with the theoretical model and establish a general design framework for absorptance-engineered metasurfaces for SHG.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73516"},"PeriodicalIF":12.1,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147830761","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

Large Language Model-Guided Design of Anti-Swelling Hybrid Dual Network Membranes for Long-Duration Alkaline Zinc Iron Flow Batteries. 基于大语言模型的碱性锌铁液流电池抗膨胀混合双网膜设计。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-06 DOI: 10.1002/smll.73664

Yu Mu, Jia-Hui Li, Jing Chen, Chenxi Dong, Juntao Zhang, Hongchao Zhang, Yuanwei Zhang, Yichan Hu, Jinggang Lan, Haibo Hu, Guojin Liang

{"title":"Large Language Model-Guided Design of Anti-Swelling Hybrid Dual Network Membranes for Long-Duration Alkaline Zinc Iron Flow Batteries.","authors":"Yu Mu, Jia-Hui Li, Jing Chen, Chenxi Dong, Juntao Zhang, Hongchao Zhang, Yuanwei Zhang, Yichan Hu, Jinggang Lan, Haibo Hu, Guojin Liang","doi":"10.1002/smll.73664","DOIUrl":"https://doi.org/10.1002/smll.73664","url":null,"abstract":"Membranes applied in alkaline flow batteries suffer swelling from spontaneous polymer chain motion, which degrades ion selectivity and mechanical strength. Here, we employ a large language model (LLM)-driven screening workflow to efficiently shortlist crosslinkers from a curated knowledge base, guiding the rational design of a hybrid dual network (H-DN) membrane. The workflow identifies N,N,N',N'-tetramethylethylenediamine as the optimal candidate to build a robust, chemically crosslinked polysulfone network interpenetrated within a widely used sulfonated poly(ether ether ketone) (SPEEK) matrix. Mechanistically, the in situ formed quaternary ammonium motifs strongly ion-pair with sulfonic acid groups, effectively suppressing chain motion without blocking ion transport channels. Consequently, the H-DN membrane exhibits a 68% reduction in swelling and an ultra-high wet-state hardness of 216 MPa (a sixfold increase over SPEEK), while retaining high ionic conductivity (10.7 mS cm-1). Enabled by this mechanically robust and highly selective architecture, the alkaline zinc-iron flow battery achieves an energy efficiency of 88.87% at a challenging areal capacity of 240 mAh cm-2 and operates stably for over 820 h without dendrite-induced failure, which surpassed the commercial Nafion212 and SPEEK benchmarks by threefold and sevenfold, respectively. This work establishes a paradigm for LLM-accelerated material discovery in addressing the stability-selectivity dilemma of ion-exchange membranes.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73664"},"PeriodicalIF":12.1,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831668","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

High-Entropy Oxide Coating for Stabilizing Zn Metal Anodes in Aqueous Zn-Ion Batteries. 用于稳定锌离子电池金属阳极的高熵氧化物涂层。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-06 DOI: 10.1002/smll.73670

Chao Geng, Wei Wen, Hai-Feng Li, Hui-Ming Cheng, Cuiping Han

{"title":"High-Entropy Oxide Coating for Stabilizing Zn Metal Anodes in Aqueous Zn-Ion Batteries.","authors":"Chao Geng, Wei Wen, Hai-Feng Li, Hui-Ming Cheng, Cuiping Han","doi":"10.1002/smll.73670","DOIUrl":"https://doi.org/10.1002/smll.73670","url":null,"abstract":"Rechargeable aqueous zinc-ion batteries have garnered considerable attention due to their intrinsic safety, high theoretical capacity, and low cost. However, problems such as zinc dendrite growth, hydrogen evolution reaction, and severe corrosion hinder their practical deployment. Herein, we fabricate a homogeneous high-entropy oxide powder (Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)O with a single-phase rock-salt structure, as a protective artificial interphase for the Zn anode. The multicomponent oxide layer enables selective Zn2+ adsorption and enhanced ion migration uniformity. Furthermore, its intrinsic hydrophobicity and strong desolvation ability suppress parasitic side reactions, thereby facilitating uniform and reversible Zn plating/stripping. As a result, the modified Zn anode exhibits an ultralong cycling lifespan of 1800 h at 10 mA cm-2 in a 2 M ZnSO4 electrolyte, and retains 750 h of stable cycling even in a natural seawater-based ZnSO4 system at 20 mA cm-2. This approach is further validated with a compositional variation-(Co0.2Cu0.2Mn0.2Ni0.2Zn0.2)O-demonstrating robust cycling over 1300 h at 10 mA cm-2. Furthermore, full cells assembled with an I2 cathode show enhanced electrochemical performance. These findings highlight the dual roles of high-entropy materials in simultaneously accelerating the kinetics of Zn2+ transport and homogenizing zinc deposition, offering a promising strategy for the stabilization of zinc metal anodes in aqueous batteries.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73670"},"PeriodicalIF":12.1,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831702","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

A Confined Cu_xO@Styrene Microreactor Achieves the Conversion of CO₂ to C₂₊ Products via Intermediate Trapping. 密闭CuxO@Styrene微反应器通过中间捕集实现CO2向C2+产物的转化。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-06 DOI: 10.1002/smll.73668

Jiaxin Bai, Xueru Zhao, Jinlong Wu, Min Zhu, Weiwei Fan, Jingtian Ni, Zhouzhou Li, Shiyuan Xu, Jing Li, Feng Li

{"title":"A Confined CuxO@Styrene Microreactor Achieves the Conversion of CO2 to C2+ Products via Intermediate Trapping.","authors":"Jiaxin Bai, Xueru Zhao, Jinlong Wu, Min Zhu, Weiwei Fan, Jingtian Ni, Zhouzhou Li, Shiyuan Xu, Jing Li, Feng Li","doi":"10.1002/smll.73668","DOIUrl":"https://doi.org/10.1002/smll.73668","url":null,"abstract":"The electrochemical reduction of carbon dioxide to multi-carbon (C2+) products is impeded by the instability and inefficient utilization of key reaction intermediates. To address this challenge, we developed a strategy based on geometric control of spatially confined microenvironments, enabling the rational design of programmable CuxO microreactors on Cu2+(111)/Cu+(200) substrates. Two distinct catalyst architectures-small-ordered (s-CuxO@styrene) and large-ordered (c-CuxO@styrene)-were systematically engineered to modulate CO intermediate behavior, thereby directing reaction selectivity toward ethylene and ethanol production. Faradaic efficiencies for C2+ products demonstrate pronounced dependence on microstructure: increasing from negligible values in the small-ordered s-CuxO@styrene (25.6% ethylene,12.4% ethanol, 3% propylene) to 78.8% in the large-ordered c-CuxO@styrene (55% ethylene, 23% ethanol, 1% propylene). In situ infrared spectroscopy reveals that the highly ordered configuration enhances CO adsorption, promoting the accumulation of critical *OCCOH and *OC2H5 intermediates. Moreover, synergistic interactions between Cu+ and Cu0 active sites accelerate C-C coupling kinetics, favoring selective formation of C2+ species. This work establishes a geometry-driven paradigm for controlling catalytic selectivity independent of compositional tuning, offering a promising avenue for the development of adaptive catalytic systems in renewable energy conversion.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73668"},"PeriodicalIF":12.1,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147830797","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

Coordination-Mediated Heterogeneous Nucleation Enables Self-Supported Ni(OH)₂/NiFe-LDH Electrodes for AEM Water Electrolysis. 配位介导的非均相成核使自支撑Ni(OH)2/Ni - ldh电极用于AEM水电解。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-06 DOI: 10.1002/smll.73532

Xinyi Han, Ziliang Deng, Yongping Yang, Zipeng Zhao

{"title":"Coordination-Mediated Heterogeneous Nucleation Enables Self-Supported Ni(OH)2/NiFe-LDH Electrodes for AEM Water Electrolysis.","authors":"Xinyi Han, Ziliang Deng, Yongping Yang, Zipeng Zhao","doi":"10.1002/smll.73532","DOIUrl":"https://doi.org/10.1002/smll.73532","url":null,"abstract":"Self-supported electrodes represent a promising anode architecture for anion exchange membrane water electrolyzers; however, their practical implementation is hindered by an insufficient understanding of their formation mechanisms and the consequently limited catalytic efficiency and stability. In this work, we developed a self-supported electrode comprising a composite catalyst of β-Ni(OH)2 and NiFe layered double hydroxide (LDH), grown on nickel felt (denoted as Ni(OH)2/NiFe-LDH/NFt) via a one-step hydrothermal process. We systematically investigated and clarified the role of NH4F in governing the synthesis of self-supported Ni(OH)2/NiFe-LDH/NFt. The coordination effect of F- with Fe3+ and etching effect of NH4 + on the surface oxide layer of nickel felt leads to favorable heterogeneous nucleation. Moreover, the etching effect provides an additional Ni source that favors the deposition of Ni(OH)2 on NiFe-LDH. However, excess NH4 + leads to the formation of Ni-based complex compounds in solution during the hydrothermal process and suppresses the deposition of Ni(OH)2. When applying as the Ni(OH)2/NiFe-LDH/NFt anode catalyst in practical anion exchange membrane water electrolysis, it requires only 1.81 V to deliver 1.0 A cm-2 and exhibits outstanding durability, with no noticeable performance decay after 750 h of continuous operation at 0.5 A cm-2.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73532"},"PeriodicalIF":12.1,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831483","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

Correction to "Tailored Ta₂O₅/TiO₂ Nanointerfaces Engineering for Reinforced Structural Integrity and High-Voltage Performance of Single-Crystal Ni-Rich Cathodes". 修正“增强结构完整性和高电压性能的单晶富镍阴极的定制Ta2O5/TiO2纳米界面工程”。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-06 DOI: 10.1002/smll.73692

引用次数: 0

Unraveling Water Sorption in Single-Crystal MOFs: Insights from Spectroscopy and Modeling on the Role of Structure, Composition, and Guest Molecules. 解开单晶mof中的水吸附：从光谱学和结构，组成和客体分子的作用建模的见解。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-06 DOI: 10.1002/smll.73636

Jonas Tittel, Fabian Knechtel, Orysia Zaremba, Andrea Darù, Jacopo Andreo, Laura Gagliardi, Stefan Wuttke, Evelyn Ploetz

{"title":"Unraveling Water Sorption in Single-Crystal MOFs: Insights from Spectroscopy and Modeling on the Role of Structure, Composition, and Guest Molecules.","authors":"Jonas Tittel, Fabian Knechtel, Orysia Zaremba, Andrea Darù, Jacopo Andreo, Laura Gagliardi, Stefan Wuttke, Evelyn Ploetz","doi":"10.1002/smll.73636","DOIUrl":"https://doi.org/10.1002/smll.73636","url":null,"abstract":"Understanding water sorption in metal-organic frameworks (MOFs) is essential for advancing atmospheric water harvesting (AWH). Yet, most studies rely on bulk measurements that mask intrinsic material properties and particle heterogeneity. Here, we systematically examine how defect chemistry, residual guest molecules, and metal substitution shape water uptake in MOF-801 and MOF-808 at the single-crystal level. Using bulk characterization together with in situ single-crystal Raman spectroscopy, digestion 1H NMR, computational modeling, and long-term cycling experiments, we disentangled how substituting Zr with Hf and changing topology affect the sorption behavior. Single-crystal measurements reveal substantial crystal-to-crystal variations in residual DMF, which directly reduce the accessible pore volume and alter adsorption isotherms-effects hidden in ensemble-averaged data. In both MOFs, Zr-based materials exhibit higher uptake due to defect-induced porosity. Hf substitution lowers the intrinsic defect density and improves cycling stability, but also leads to stronger solvent coordination and reduced pore accessibility. This trade-off is most pronounced in MOF-808(Zr), which shows high uptake but collapses during cycling, whereas the Hf analogue remains structurally stable at reduced capacity. By resolving how defects, guest molecules, and metal identity interplay at the single-crystal level, this work provides molecular design rules for balancing stability and performance in next-generation AWH sorbents.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73636"},"PeriodicalIF":12.1,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831554","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

Hierarchically Multifunctional Fiber-optic Theranostic Probe for Cancer Photothermal-photodynamic Synergism. 分级多功能癌症光热-光动力协同光纤治疗探针。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-06 DOI: 10.1002/smll.73678

Zhuoran Li, Ni Lan, Yongkang Zhang, Ye Cao, Fangzhou Jin, Zhiyuan Xu, Junqiu Long, Zesen Li, Yang Ran, Bai-Ou Guan

{"title":"Hierarchically Multifunctional Fiber-optic Theranostic Probe for Cancer Photothermal-photodynamic Synergism.","authors":"Zhuoran Li, Ni Lan, Yongkang Zhang, Ye Cao, Fangzhou Jin, Zhiyuan Xu, Junqiu Long, Zesen Li, Yang Ran, Bai-Ou Guan","doi":"10.1002/smll.73678","DOIUrl":"https://doi.org/10.1002/smll.73678","url":null,"abstract":"Photodynamic therapy (PDT) is an FDA-approved cancer treatment, yet its clinical efficacy is compromised by limited light penetration and hypoxia. Herein, we proposed a multifunctional fiber-optic theranostic probe based on a spatially stratified functional multiplexing strategy: an inner sensing layer containing the oxygen-sensitive probe (Ru(dpp)), an outer therapeutic layer loaded with the photosensitizer (ICG), and a thermally-triggered oxygen generator (CaO2@LA). Crucially, this layered design leverages wavelength-dependent evanescent field properties to enable multi-wavelength activation while spatially separating the sensor from the photosensitizer, thereby preventing signal crosstalk. Functionally, the incorporation of CaO2@LA mitigates the hypoxia-induced restriction on PDT, while the PTT-PDT synergy achieves potent antitumor efficacy under mild hyperthermia, enhancing treatment safety. In vitro experiments demonstrated the probe's excellent dissolved oxygen (DO) sensing performance, featuring a high resolution of 0.12 mg/L, a rapid response time of 1 s, and efficient ROS generation. Subsequently, the probe demonstrated dual functionality in vivo within a murine model, allowing pointwise identification of intratumoral hypoxic heterogeneity through DO sensing, while achieving complete inhibition of tumor growth. This study provides a new paradigm for the functional integration and efficacy enhancement of fiber-optic theranostics for in situ oncology, holding significant potential to advance the clinical translation of fiber-mediated phototherapies.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73678"},"PeriodicalIF":12.1,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831650","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

Electrically Tunable Tunneling and Spectral Response in WSe₂/h-BN/CdSe/Graphene Heterostructure. WSe2/h-BN/CdSe/石墨烯异质结构中的电可调谐隧道效应和光谱响应。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-06 DOI: 10.1002/smll.73645

Sang-Hyeon Lee, Justice Agbeshie Teku, Min-Hye Jeong, Jae-Hyeon Ahn, Weon-Sik Chae, Dohyun Kwak, Jong-Soo Lee

{"title":"Electrically Tunable Tunneling and Spectral Response in WSe2/h-BN/CdSe/Graphene Heterostructure.","authors":"Sang-Hyeon Lee, Justice Agbeshie Teku, Min-Hye Jeong, Jae-Hyeon Ahn, Weon-Sik Chae, Dohyun Kwak, Jong-Soo Lee","doi":"10.1002/smll.73645","DOIUrl":"https://doi.org/10.1002/smll.73645","url":null,"abstract":"Mixed-dimensional heterostructures consisting of zero- and two-dimensional materials offer a promising platform for optoelectronic devices, as the versatility of material combination allows tunable optical properties. Bias-induced approaches provide an additional means to tune the optical properties beyond the intrinsic band alignment of van der Waals junctions. Here, bias-induced tunneling characteristics are achieved in vertically stacked WSe2/h-BN/CdSe quantum dots/graphene heterostructures by employing the top graphene electrode to regulate carrier transport across the h-BN barrier. The electrical analyses based on the Simmons approximation demonstrate tunneling-mediated charge transfer through thin h-BN layers and bias-dependent modulation of the barrier height. Furthermore, tunneling-induced exciton dissociation in WSe2 and CdSe QDs is observed through spectral responsivity and scanning photocurrent measurements. This work establishes a voltage-dependent tunneling platform that enables deterministic control of carrier dynamics in mixed-dimensional optoelectronic devices.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73645"},"PeriodicalIF":12.1,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831607","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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