Pub Date : 2026-10-14DOI: 10.1021/acs.nanolett.6c01308
Michael Oberaigner,Manuel Ederer,Sandeep K. Chaluvadi,Pasquale Orgiani,Regina Ciancio,Stefan Löffler,Gerald Kothleitner,Daniel Knez
Abstract Atomic-level insight into structure, charge distribution, chemistry, and electronic states is essential for understanding emergent properties at oxide interfaces. Here, we leverage the quasi-strain-free anatase TiO2/LaAlO3 interface as an ideal model system to decouple intrinsic polar discontinuities from complex strain artifacts. By combining atomic-resolution electron energy loss spectroscopy with integrated differential phase contrast, we spatially map the electronic states associated with the formation of a two-dimensional electron gas (2DEG). This correlative approach enables the direct real-space disentanglement of intrinsic 2DEG-related states from extrinsic Ti3+ defect states. Supported by density functional theory and inelastic scattering simulations, we reveal a physical superposition: the intrinsic polar electronic reconstruction anchors metallic states directly at the boundary, while oxygen vacancies accumulate further into the film, acting as a donor reservoir. This work not only resolves long-standing ambiguities regarding oxide interfacial conductivity but also provides a robust, transferable framework for related material systems.
{"title":"Atomic-Scale\u0000Mapping of an Emergent Interfacial Two-Dimensional\u0000Electron Gas at Anatase/LaAlO3","authors":"Michael Oberaigner,Manuel Ederer,Sandeep K. Chaluvadi,Pasquale Orgiani,Regina Ciancio,Stefan Löffler,Gerald Kothleitner,Daniel Knez","doi":"10.1021/acs.nanolett.6c01308","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c01308","url":null,"abstract":"Abstract Atomic-level insight into structure, charge distribution, chemistry, and electronic states is essential for understanding emergent properties at oxide interfaces. Here, we leverage the quasi-strain-free anatase TiO2/LaAlO3 interface as an ideal model system to decouple intrinsic polar discontinuities from complex strain artifacts. By combining atomic-resolution electron energy loss spectroscopy with integrated differential phase contrast, we spatially map the electronic states associated with the formation of a two-dimensional electron gas (2DEG). This correlative approach enables the direct real-space disentanglement of intrinsic 2DEG-related states from extrinsic Ti3+ defect states. Supported by density functional theory and inelastic scattering simulations, we reveal a physical superposition: the intrinsic polar electronic reconstruction anchors metallic states directly at the boundary, while oxygen vacancies accumulate further into the film, acting as a donor reservoir. This work not only resolves long-standing ambiguities regarding oxide interfacial conductivity but also provides a robust, transferable framework for related material systems.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"27 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149209322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-10-13DOI: 10.1021/acs.nanolett.6c03698
Guadalupe García-Arellano,Gabriel I. López-Morales,Kang Xu,Samra Husremović,Jiayi Li,Arun Ramanathan,Xavier Roy,Cyrus E. Dreyer,Carlos A. Meriles
Embedded atomic emitters offer a complementary approach to characterizing magnetism in two-dimensional materials by accessing the magnetic environment from within. Here, we demonstrate that ion-implanted Er3+ centers act as internal optical probes in the van der Waals antiferromagnet CrSBr. Temperature-dependent telecom photoluminescence reveals signatures of the magnetic transition, persistent local magnetic behavior above the bulk Néel temperature, pronounced thermal hysteresis, and redistribution of optical spectral weight near the transition. Upon cooling, the Er resonances sharpen to the instrumental limit, pointing to remarkably homogeneous local environments despite implantation. Measurements spanning a 20-fold range of implantation fluence, structural characterization, and first-principles calculations suggest that the detected emission originates predominantly from an optically active subset of Er centers occupying well-defined environments and minimally perturbing the host magnetism. These results establish rare-earth defects as embedded probes of local magnetism and open opportunities for quantum-optical interrogation at individual lattice sites.
{"title":"Erbium Probes of Magnetic Order in a van der Waals Material","authors":"Guadalupe García-Arellano,Gabriel I. López-Morales,Kang Xu,Samra Husremović,Jiayi Li,Arun Ramanathan,Xavier Roy,Cyrus E. Dreyer,Carlos A. Meriles","doi":"10.1021/acs.nanolett.6c03698","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c03698","url":null,"abstract":"Embedded atomic emitters offer a complementary approach to characterizing magnetism in two-dimensional materials by accessing the magnetic environment from within. Here, we demonstrate that ion-implanted Er3+ centers act as internal optical probes in the van der Waals antiferromagnet CrSBr. Temperature-dependent telecom photoluminescence reveals signatures of the magnetic transition, persistent local magnetic behavior above the bulk Néel temperature, pronounced thermal hysteresis, and redistribution of optical spectral weight near the transition. Upon cooling, the Er resonances sharpen to the instrumental limit, pointing to remarkably homogeneous local environments despite implantation. Measurements spanning a 20-fold range of implantation fluence, structural characterization, and first-principles calculations suggest that the detected emission originates predominantly from an optically active subset of Er centers occupying well-defined environments and minimally perturbing the host magnetism. These results establish rare-earth defects as embedded probes of local magnetism and open opportunities for quantum-optical interrogation at individual lattice sites.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"43 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-10-13DOI: 10.1021/acs.nanolett.6c04137
Daniel Marx,David Malsbenden,Ivan Gligonov,Dominik Wöll,Jörg Enderlein,Oleksii Nevskyi
Fluorescence lifetimes near dielectric interfaces depend on molecular dipole orientation, but this relationship becomes more complex when emitters are confined within finite nanometer-thick polymer films. Here, we combine radially polarized excitation imaging with time-correlated single-photon counting to follow the orientation and fluorescence lifetime of individual PDI molecules undergoing rotational motion in thin poly(n-butyl methacrylate) films. Orientation-sensitive fluorescence patterns were analyzed using vectorial wave-optical simulations, enabling dipole orientation and excited-state lifetime to be correlated over time for the same emitter. The lifetime–orientation relationships vary systematically with film thickness and between molecules within the same film. Electrodynamic calculations for the glass–polymer–air geometry reproduce the principal trends and show that the observed heterogeneity is consistent with different axial emitter positions. These results establish single molecular dipoles as probes of finite nanometer-thick dielectric environments.
{"title":"Dielectric Interfaces Reshape Dynamic Single-Molecule Optical Fingerprints in Nanometer-Thick Polymer Films","authors":"Daniel Marx,David Malsbenden,Ivan Gligonov,Dominik Wöll,Jörg Enderlein,Oleksii Nevskyi","doi":"10.1021/acs.nanolett.6c04137","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c04137","url":null,"abstract":"Fluorescence lifetimes near dielectric interfaces depend on molecular dipole orientation, but this relationship becomes more complex when emitters are confined within finite nanometer-thick polymer films. Here, we combine radially polarized excitation imaging with time-correlated single-photon counting to follow the orientation and fluorescence lifetime of individual PDI molecules undergoing rotational motion in thin poly(n-butyl methacrylate) films. Orientation-sensitive fluorescence patterns were analyzed using vectorial wave-optical simulations, enabling dipole orientation and excited-state lifetime to be correlated over time for the same emitter. The lifetime–orientation relationships vary systematically with film thickness and between molecules within the same film. Electrodynamic calculations for the glass–polymer–air geometry reproduce the principal trends and show that the observed heterogeneity is consistent with different axial emitter positions. These results establish single molecular dipoles as probes of finite nanometer-thick dielectric environments.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"87 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-10-13DOI: 10.1021/acs.nanolett.6c02373
Kohei Shimokawa,Byung-Man Kim,Arvind Pujari,Hooman Abbasi,Tetsu Ichitsubo,Michael De Volder
Integrating solar energy conversion and storage into single-unit photobatteries offers compact energy supplies. However, achieving sufficient photovoltage to charge batteries without external bias remains a critical bottleneck for these devices. Here, we demonstrate that the photovoltage in Zn-ion photobatteries can be modulated and enhanced by selecting and structuring the photoactive materials strategically. Randomly dispersed electrode configurations are easy to manufacture but they can suffer from charge recombination. In our experiments, these yielded a negligible photovoltage of ∼0.01 V. In comparison, our proposed layer-by-layer design, integrating a solid-state dye-sensitized solar cell (DSSC) with an optimized spinel Zn–Mn oxide cathode, increased the photovoltage output to ∼1 V under 1-sun illumination. This dramatic performance enhancement is achieved by better control over interfaces and charge transport and establishes a strategy for improving the architecture of future photobatteries.
{"title":"Photobattery Architectures to Suppress Charge Recombination","authors":"Kohei Shimokawa,Byung-Man Kim,Arvind Pujari,Hooman Abbasi,Tetsu Ichitsubo,Michael De Volder","doi":"10.1021/acs.nanolett.6c02373","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c02373","url":null,"abstract":"Integrating solar energy conversion and storage into single-unit photobatteries offers compact energy supplies. However, achieving sufficient photovoltage to charge batteries without external bias remains a critical bottleneck for these devices. Here, we demonstrate that the photovoltage in Zn-ion photobatteries can be modulated and enhanced by selecting and structuring the photoactive materials strategically. Randomly dispersed electrode configurations are easy to manufacture but they can suffer from charge recombination. In our experiments, these yielded a negligible photovoltage of ∼0.01 V. In comparison, our proposed layer-by-layer design, integrating a solid-state dye-sensitized solar cell (DSSC) with an optimized spinel Zn–Mn oxide cathode, increased the photovoltage output to ∼1 V under 1-sun illumination. This dramatic performance enhancement is achieved by better control over interfaces and charge transport and establishes a strategy for improving the architecture of future photobatteries.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"12 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The deep integration of human–machine interface (HMI) technology and the Internet of Things (IoT) has imposed stringent new requirements for electronic skin (e-skin) in terms of flexibility, comfort, and high sensitivity. Herein we present a multiconductive network hydrogel e-skin (MCNHE-skin) based on a poly(vinyl alcohol) (PVA)/polyvinylpyrrolidone (PVP) dual-network matrix with polydopamine (PDA), carbon nanotubes (CNTs), and MXene as conductive fillers. The MCNHE-skin exhibits electrical conductivity (<5 kΩ), high stretchability (∼650%), strong self-adhesion (∼19 kPa), and low modulus (∼3.6 kPa). These characteristics enable its successful application in multimodal sensing systems such as strain sensors, pressure sensors, triboelectric nanogenerators (TENGs), and physiological signal monitors. Furthermore, by integration with flexible printed circuit boards (FPCBs), MCNHE-skin is developed into smart wearable systems for noncontact HMI. The 0D/1D/2D synergistic conductive network presented in this hydrogel e-skin yields high-fidelity sensing and noncontact control capabilities, marking a significant step forward in the development of multifunctional wearable electronics.
{"title":"A Skin-like\u0000Hydrogel with Multidimensional Fillers\u0000for Stable Human–Machine Interaction","authors":"Shengxin Xiang,Lei Liu,Xiao Wei,Feixiang Gao,Yu Lin,Zhiwei Zhao,Xinkai Xie,Jun Wu","doi":"10.1021/acs.nanolett.6c03665","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c03665","url":null,"abstract":"Abstract The deep integration of human–machine interface (HMI) technology and the Internet of Things (IoT) has imposed stringent new requirements for electronic skin (e-skin) in terms of flexibility, comfort, and high sensitivity. Herein we present a multiconductive network hydrogel e-skin (MCNHE-skin) based on a poly(vinyl alcohol) (PVA)/polyvinylpyrrolidone (PVP) dual-network matrix with polydopamine (PDA), carbon nanotubes (CNTs), and MXene as conductive fillers. The MCNHE-skin exhibits electrical conductivity (&lt;5 kΩ), high stretchability (∼650%), strong self-adhesion (∼19 kPa), and low modulus (∼3.6 kPa). These characteristics enable its successful application in multimodal sensing systems such as strain sensors, pressure sensors, triboelectric nanogenerators (TENGs), and physiological signal monitors. Furthermore, by integration with flexible printed circuit boards (FPCBs), MCNHE-skin is developed into smart wearable systems for noncontact HMI. The 0D/1D/2D synergistic conductive network presented in this hydrogel e-skin yields high-fidelity sensing and noncontact control capabilities, marking a significant step forward in the development of multifunctional wearable electronics.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"11 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149209324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-10-13DOI: 10.1021/acs.nanolett.6c03824
The-Hung Mai,Thi H. Ho,Shi-Hui Liu,Santhoshkumar S,Muhammad Adnan,Arvind Chandrasekar,Tuan V. Vu,Chien-Cheng Kuo,Hung-Duen Yang,Liuwen Chang,Wei-Lung Tseng,Trung Nguyen-Thoi,Chung-Li Dong,Phuong V. Pham
Single-crystalline metals, with their distinctive symmetries, are the ideal medium for high-order molecular arrangement and the diminishing of grain boundaries and defect sites coupled with high anisotropy. However, conventional synthesis via bulk growth or epitaxial deposition remains complex, costly, and difficult to scale. Here, we report a simple and inexpensive strategy as an alternative to conventional strategies for manufacturing single-crystalline metal foils. Miraculously, by miniaturization of grain boundaries and promoting surface energy minimization during the rotation of the crystal lattice followed by the consumption of neighboring grains, high-quality and large-scale single-crystalline metal foils (Cu(111), Ni(111)) were obtained via vertically suspended chemical vapor deposition (CVD) annealing of polycrystalline metal foils. This discovery offers a potential strategy for manipulating and producing large-scale metal foils that may be used for industrial-scale applications.
{"title":"Directional Manufacturing of Defect Mitigation and Large-Scale Single-Crystalline Metal Foils via Gas Flow Optimization toward Commercialization","authors":"The-Hung Mai,Thi H. Ho,Shi-Hui Liu,Santhoshkumar S,Muhammad Adnan,Arvind Chandrasekar,Tuan V. Vu,Chien-Cheng Kuo,Hung-Duen Yang,Liuwen Chang,Wei-Lung Tseng,Trung Nguyen-Thoi,Chung-Li Dong,Phuong V. Pham","doi":"10.1021/acs.nanolett.6c03824","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c03824","url":null,"abstract":"Single-crystalline metals, with their distinctive symmetries, are the ideal medium for high-order molecular arrangement and the diminishing of grain boundaries and defect sites coupled with high anisotropy. However, conventional synthesis via bulk growth or epitaxial deposition remains complex, costly, and difficult to scale. Here, we report a simple and inexpensive strategy as an alternative to conventional strategies for manufacturing single-crystalline metal foils. Miraculously, by miniaturization of grain boundaries and promoting surface energy minimization during the rotation of the crystal lattice followed by the consumption of neighboring grains, high-quality and large-scale single-crystalline metal foils (Cu(111), Ni(111)) were obtained via vertically suspended chemical vapor deposition (CVD) annealing of polycrystalline metal foils. This discovery offers a potential strategy for manipulating and producing large-scale metal foils that may be used for industrial-scale applications.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"11 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-10-12DOI: 10.1021/acs.nanolett.6c04058
Guiying He,Lianshun Luo,Mircea Cotlet,Guoxiang Hu,Gangli Wang,Rongchao Jin
Dual emissive materials are of particular importance in chemical and biological assays. Herein, we focus on a rod-shaped Au42(SCH2CH2Ph)32 nanocluster that exhibits dual emission at 875 and 1040 nm owing to fluorescence (FL) and phosphorescence (PH), respectively. Transient absorption analysis shows a slow intersystem crossing (ISC, ∼500 ps) from lowest singlet S1 to triplet T1 upon direct S1 excitation, leading to dual emission from both S1 and T1. However, upon excitation of the higher Sn state, we observe a metastable singlet state (S′). We rationalize two competing decay pathways from S′: (i) internal conversion to S1 and (ii) ISC to high triplet Tn≥2. These processes alter the populations of the S1 and T1 states, which explains the excitation-wavelength-dependent dual emission and FL/PH ratios. The revealed excited-state mechanism and the dual emissive Au42 material will serve as a paradigm for future research on atomically precise nanoclusters.
{"title":"Excitation-Wavelength-Dependent Dual Emission in Au42 Quantum Rods","authors":"Guiying He,Lianshun Luo,Mircea Cotlet,Guoxiang Hu,Gangli Wang,Rongchao Jin","doi":"10.1021/acs.nanolett.6c04058","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c04058","url":null,"abstract":"Dual emissive materials are of particular importance in chemical and biological assays. Herein, we focus on a rod-shaped Au42(SCH2CH2Ph)32 nanocluster that exhibits dual emission at 875 and 1040 nm owing to fluorescence (FL) and phosphorescence (PH), respectively. Transient absorption analysis shows a slow intersystem crossing (ISC, ∼500 ps) from lowest singlet S1 to triplet T1 upon direct S1 excitation, leading to dual emission from both S1 and T1. However, upon excitation of the higher Sn state, we observe a metastable singlet state (S′). We rationalize two competing decay pathways from S′: (i) internal conversion to S1 and (ii) ISC to high triplet Tn≥2. These processes alter the populations of the S1 and T1 states, which explains the excitation-wavelength-dependent dual emission and FL/PH ratios. The revealed excited-state mechanism and the dual emissive Au42 material will serve as a paradigm for future research on atomically precise nanoclusters.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"27 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-10-12DOI: 10.1021/acs.nanolett.6c04092
Ella Davidi,Isaac Loke,Samuel Eisenberg,Xinzhe Xue,Megan C. Freyman,Asya Orhan,Erika P. Ramos,Jianchao Ye,Seongkoo Cho,Makena White,Christopher Nelson,Hanyu Wang,Christine A. Orme,Bruce Dunn,Marcus A. Worsley,Yat Li
Fast-charging lithium-ion batteries require cathodes that sustain rapid Li+ transport while maintaining structural and interfacial stability. Here, we investigate particle-size effects in γ-MnO2 by comparing micron-sized (4.4 ± 0.8 μm) and nanosized (62 ± 21 nm) particles under identical conditions. Nanosized γ-MnO2 delivers 160.1 mAh g–1 at C/10 and retains ∼66% capacity at 5C while exhibiting lower charge-transfer and diffusion-related impedance. Cyclic voltammetry and Dunn’s analysis reveal a 68.9% capacitive contribution at 2 mV s–1, indicating a shift toward faster surface-controlled charge storage enabled by increased surface area and shorter Li+ diffusion pathways. GITT measurements show deeper lithiation (x ≈ 0.65 vs 0.48 in LixMnO2) and a more homogeneous solid-solution-like intercalation regime in nanosized particles, avoiding bulk phase-transition kinetic bottlenecks. The nanosized cathode retains 70% capacity with ∼99.5% Coulombic efficiency after 400 cycles at 3C, demonstrating particle-size engineering as an effective strategy for high-rate, long-life advanced battery energy storage.
快速充电的锂离子电池要求阴极在保持结构和界面稳定性的同时保持Li+的快速传输。本文通过比较微米（4.4±0.8 μm）和纳米（62±21 nm）颗粒在相同条件下对γ-MnO2的粒径影响进行了研究。纳米尺寸的γ-MnO2在C/10时提供160.1 mAh g-1，在5C时保持约66%的容量，同时表现出较低的电荷转移和扩散相关阻抗。循环伏安法和Dunn的分析显示，在2mv s-1下，电容性贡献为68.9%，表明通过增加表面积和缩短Li+扩散路径，可以实现更快的表面控制电荷存储。GITT测量结果显示，LixMnO2的锂化程度更深（x≈0.65 vs 0.48），并且在纳米颗粒中具有更均匀的类似固溶体的插层结构，避免了大块相变动力学瓶颈。该纳米级阴极在3C下循环400次后仍能保持70%的容量和99.5%的库仑效率，证明了粒径工程是高速率、长寿命先进电池储能的有效策略。
{"title":"From Micro to Nano: Boosting γ-MnO2 Cathode Performance through Particle Size Engineering","authors":"Ella Davidi,Isaac Loke,Samuel Eisenberg,Xinzhe Xue,Megan C. Freyman,Asya Orhan,Erika P. Ramos,Jianchao Ye,Seongkoo Cho,Makena White,Christopher Nelson,Hanyu Wang,Christine A. Orme,Bruce Dunn,Marcus A. Worsley,Yat Li","doi":"10.1021/acs.nanolett.6c04092","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c04092","url":null,"abstract":"Fast-charging lithium-ion batteries require cathodes that sustain rapid Li+ transport while maintaining structural and interfacial stability. Here, we investigate particle-size effects in γ-MnO2 by comparing micron-sized (4.4 ± 0.8 μm) and nanosized (62 ± 21 nm) particles under identical conditions. Nanosized γ-MnO2 delivers 160.1 mAh g–1 at C/10 and retains ∼66% capacity at 5C while exhibiting lower charge-transfer and diffusion-related impedance. Cyclic voltammetry and Dunn’s analysis reveal a 68.9% capacitive contribution at 2 mV s–1, indicating a shift toward faster surface-controlled charge storage enabled by increased surface area and shorter Li+ diffusion pathways. GITT measurements show deeper lithiation (x ≈ 0.65 vs 0.48 in LixMnO2) and a more homogeneous solid-solution-like intercalation regime in nanosized particles, avoiding bulk phase-transition kinetic bottlenecks. The nanosized cathode retains 70% capacity with ∼99.5% Coulombic efficiency after 400 cycles at 3C, demonstrating particle-size engineering as an effective strategy for high-rate, long-life advanced battery energy storage.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"13 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-10-12DOI: 10.1021/acs.nanolett.6c04159
Xiaoqian Gong,Yixing Wang,Mengya Ge,Qinghong Wang
Aqueous zinc–iodine (Zn–I2) batteries are attractive for large-scale energy storage because of their low cost and inherent safety. However, the practical use of an I2 cathode is severely restricted by poor electronic conductivity and the shuttle effect of soluble polyiodides. Herein, a synergistic scaffold composed of MXene and carbon nanotubes (CNTs) modified with protonated polyaniline (PANI) via electrostatic interactions was designed. The MXene/CNT scaffold ensures overall conductivity and structural integrity. The protonated PANI immobilizes iodine species through nitrogen-containing groups and accelerates their interconversion, effectively suppressing the shuttle effect. The MXene/CNTs/PANI-I2 cathode with an iodine loading of 43.96 wt % achieves a superior specific capacity of 150 mAh g–1 at a high rate of 20 C as well as excellent cycling stability over 10 000 cycles. This work offers a viable strategy for developing stable I2 cathodes for high-performance Zn–I2 batteries.
水相锌碘（Zn-I2）电池由于其低成本和固有的安全性，在大规模储能方面具有很大的吸引力。然而，I2阴极的实际使用受到电子导电性差和可溶性多碘化物的穿梭效应的严重限制。本文设计了一种由MXene和经质子化聚苯胺（PANI）修饰的碳纳米管（CNTs）通过静电相互作用组成的协同支架。MXene/CNT支架可确保整体导电性和结构完整性。质子化聚苯胺通过含氮基团固定碘，加速其相互转化，有效抑制穿梭效应。碘负载为43.96 wt %的MXene/CNTs/PANI-I2阴极在20℃的高倍率下具有150 mAh g-1的优越比容量以及超过10 000次循环的优异循环稳定性。这项工作为开发高性能锌- I2电池的稳定I2阴极提供了一种可行的策略。
{"title":"Polyaniline-Modified MXene/Carbon Nanotube Scaffold Enabling High-Rate and Long-Cycle Zinc–Iodine Batteries","authors":"Xiaoqian Gong,Yixing Wang,Mengya Ge,Qinghong Wang","doi":"10.1021/acs.nanolett.6c04159","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c04159","url":null,"abstract":"Aqueous zinc–iodine (Zn–I2) batteries are attractive for large-scale energy storage because of their low cost and inherent safety. However, the practical use of an I2 cathode is severely restricted by poor electronic conductivity and the shuttle effect of soluble polyiodides. Herein, a synergistic scaffold composed of MXene and carbon nanotubes (CNTs) modified with protonated polyaniline (PANI) via electrostatic interactions was designed. The MXene/CNT scaffold ensures overall conductivity and structural integrity. The protonated PANI immobilizes iodine species through nitrogen-containing groups and accelerates their interconversion, effectively suppressing the shuttle effect. The MXene/CNTs/PANI-I2 cathode with an iodine loading of 43.96 wt % achieves a superior specific capacity of 150 mAh g–1 at a high rate of 20 C as well as excellent cycling stability over 10 000 cycles. This work offers a viable strategy for developing stable I2 cathodes for high-performance Zn–I2 batteries.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"78 6 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-10-12DOI: 10.1021/acs.nanolett.6c03526
Xin Wei,Qing-Yuan Zhao,Ji-Zun Zhang,Hai Xu,Zi-Yan Liu,Naoyuki Shibayama,Yu-Ting Xu,Xiao-Feng Wang
The development of aqueous zinc batteries is critically constrained by the electrode–electrolyte interfacial instability at the Zn anode. Herein, a zwitterionic dynamic buffering interface (ZDBI) is constructed by using trace glufosinate ammonium (GA). The dissociated GA– anchors onto the Zn(101) surface via its phosphinate and carboxylate groups with its protonated amino group (−NH3+) extending into the electrolyte to dynamically respond to interfacial electric fields. Meanwhile, free NH4+ cations can form an electrostatic shielding layer under an electric field. This synergistic chemisorbed-mobile-ion buffering network thickens the electric double layer, inhibits water-splitting parasitic reactions, and induces (101)-oriented deposition. Consequently, Zn||Zn symmetric cells sustain stable cycling for over 7800 h with a cumulative capacity of 3.9 Ah cm–2, while Zn||Cu half-cells achieve an average Coulombic efficiency of 99.3%, and Zn||V2O5 full cells retain 88% capacity after 1000 cycles at 5 A g–1. This work offers an efficient strategy for addressing electrode–electrolyte interfacial issues.
锌阳极电极-电解质界面的不稳定性严重制约了锌水溶液电池的发展。本文采用微量草铵（GA）构建了两性离子动态缓冲界面（ZDBI）。解离的GA -通过其磷酸基和羧酸基锚定在Zn（101）表面，其质子化氨基（- NH3+）延伸到电解质中，动态响应界面电场。同时，游离NH4+阳离子在电场作用下形成静电屏蔽层。这种协同的化学吸收-移动离子缓冲网络增厚了双电层，抑制了水分解寄生反应，并诱导了（101）定向沉积。因此，Zn||Zn对称电池可稳定循环超过7800 h，累积容量为3.9 Ah cm-2，而Zn||Cu半电池可实现99.3%的平均库仑效率，Zn||V2O5全电池在5 a g-1下循环1000次后仍保持88%的容量。这项工作为解决电极-电解质界面问题提供了一种有效的策略。
{"title":"Interface-Induced Crystallographic Orientation of Zinc Deposition Enabled by a Zwitterionic Dynamic Buffering Interface for Ultralong-Life Aqueous Zinc Batteries","authors":"Xin Wei,Qing-Yuan Zhao,Ji-Zun Zhang,Hai Xu,Zi-Yan Liu,Naoyuki Shibayama,Yu-Ting Xu,Xiao-Feng Wang","doi":"10.1021/acs.nanolett.6c03526","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c03526","url":null,"abstract":"The development of aqueous zinc batteries is critically constrained by the electrode–electrolyte interfacial instability at the Zn anode. Herein, a zwitterionic dynamic buffering interface (ZDBI) is constructed by using trace glufosinate ammonium (GA). The dissociated GA– anchors onto the Zn(101) surface via its phosphinate and carboxylate groups with its protonated amino group (−NH3+) extending into the electrolyte to dynamically respond to interfacial electric fields. Meanwhile, free NH4+ cations can form an electrostatic shielding layer under an electric field. This synergistic chemisorbed-mobile-ion buffering network thickens the electric double layer, inhibits water-splitting parasitic reactions, and induces (101)-oriented deposition. Consequently, Zn||Zn symmetric cells sustain stable cycling for over 7800 h with a cumulative capacity of 3.9 Ah cm–2, while Zn||Cu half-cells achieve an average Coulombic efficiency of 99.3%, and Zn||V2O5 full cells retain 88% capacity after 1000 cycles at 5 A g–1. This work offers an efficient strategy for addressing electrode–electrolyte interfacial issues.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"12 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：