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Cathodoluminescence Wavefront Retrieval 阴极发光波前检索
IF 9.1 1区 材料科学
Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-20 DOI: 10.1021/acs.nanolett.6c03354
Izzah Machfuudzoh, Ryoichi Horisaki, Takumi Sannomiya
{"title":"Cathodoluminescence Wavefront Retrieval","authors":"Izzah Machfuudzoh,&nbsp;Ryoichi Horisaki,&nbsp;Takumi Sannomiya","doi":"10.1021/acs.nanolett.6c03354","DOIUrl":"10.1021/acs.nanolett.6c03354","url":null,"abstract":"<p>Free-electron-basednanoscopy enables the study of opticalexcitationsin materials with deep-subwavelength spatial resolution, with cathodoluminescence(CL) being one of the most useful signals. When combined with an opticalcollection system, CL measurements can access multidimensional informationon light; yet the phase of the emitted optical fields has remainedlargely elusive. Here, we demonstrate a reference-free phase retrievalapproach for far-field CL wavefronts using the Gerchberg–Saxtonalgorithm implemented with real-space and angular-space CL intensitydata. Applying this approach to representative nanostructures, includinga planar surface, nanosphere, plasmonic crystal, and nanowire, wereconstructed distinct phase distributions that revealed their underlyingradiation mechanisms. This reference-free framework offers a robustand flexible route for retrieving the phase of electron beam-excitedoptical fields without relying on a reference wave, making it readilyextendable to a wide range of nanostructures.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"14922–14928"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149221738","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}
引用次数: 0
Pixelated Tellurium Nanowire Assemblies for Flexible and Polarization-Driven Multimodal Anticounterfeiting 用于柔性和极化驱动多模态防伪的像素化碲纳米线组件
IF 9.1 1区 材料科学
Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-21 DOI: 10.1021/acs.nanolett.6c02891
Yingtao Zhao, Hao Liu, Jiajun Liu, Shiyu Liu, Zhenhua Yang, Jinshi Zhao, Jian Zhu
{"title":"Pixelated Tellurium Nanowire Assemblies for Flexible and Polarization-Driven Multimodal Anticounterfeiting","authors":"Yingtao Zhao,&nbsp;Hao Liu,&nbsp;Jiajun Liu,&nbsp;Shiyu Liu,&nbsp;Zhenhua Yang,&nbsp;Jinshi Zhao,&nbsp;Jian Zhu","doi":"10.1021/acs.nanolett.6c02891","DOIUrl":"10.1021/acs.nanolett.6c02891","url":null,"abstract":"<p>Anticounterfeiting technologies capable of enabling bothvisualauthentication and machine-readable encryption are critically demanded.Here we present a wafer-scale and flexible tellurium nanowire (TeNW)platform with programmable localized orientation, enabling dual-modeanticounterfeiting based on polarization-encoded information. By employinga lock–shear and lift-off strategy, pixelated and highly alignedTeNW arrays with feature sizes down to 5 μm are realized onarbitrary rigid and flexible substrates, exhibiting dichroic ratiosof up to 4.6 and stretchability exceeding 100%. Beyond passive opticalsecurity, the semiconducting nature of TeNWs allows these orientedarrays to function as active channels in asymmetric Schottky photodetectors,delivering broadband photoresponse (405–1064 nm), an anisotropicphotocurrent ratio of 2.35, and an ultrafast response time of 430μs under self-powered operation. Leveraging this capability,polarization-encoded information can be transduced into polarization-sensitiveelectrical signals, establishing a hardware-level security paradigmthat physically encodes information in the material rather than inalgorithms.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"14870–14880"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149226575","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}
引用次数: 0
(PEA)2(FA)Pb2I7/PVDF Composite Flexible Films Enable Self-Powered X-ray Detection with High Sensitivity and a Low Detection Limit (PEA)2(FA)Pb2I7/PVDF复合柔性薄膜使自供电x射线检测具有高灵敏度和低检测极限
IF 10.8 1区 材料科学
Nano Letters Pub Date : 2026-11-04 DOI: 10.1021/acs.nanolett.6c04704
Yuanxiang You,Yaping Gong,Qilin Wei,Huanxin Su,Haojie Xu,Zengshan Yue,Dan Huang,William W. Yu,Shiguo Han
{"title":"(PEA)2(FA)Pb2I7/PVDF Composite Flexible Films Enable Self-Powered X-ray Detection with High Sensitivity and a Low Detection Limit","authors":"Yuanxiang You,Yaping Gong,Qilin Wei,Huanxin Su,Haojie Xu,Zengshan Yue,Dan Huang,William W. Yu,Shiguo Han","doi":"10.1021/acs.nanolett.6c04704","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c04704","url":null,"abstract":"Metal halide perovskites (MHPs) have attracted significant interest in the field of X-ray detection due to their unique semiconducting properties. However, the self-powered detection capabilities of almost all of these materials rely on their inherent ferroelectricity or heterojunction structures, yet the structure design and fabrication still pose significant challenges. By incorporating a polymer into a centrosymmetric MHP, we successfully prepared (PEA)2(FA)Pb2I7/PVDF composite flexible films (PEA = β-phenylethylamine, FA = formamidine, PVDF = poly(vinylidene fluoride)) and obtained self-powered X-ray responses in a nonpolar perovskite. Notably, the photodetector based on thin films exhibits excellent self-powered X-ray detection performance with a high sensitivity (559.11 μC Gyair–1 cm–2), a low detection limit (29.09 nGyair s–1), and excellent radiation stability. Our work offers a new strategy for self-driven devices without relying on ferroelectricity or heterojunctions, expanding halide perovskites in flexible film applications.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"15 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359314","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}
引用次数: 0
Triangular-Textured MoS2/FAPbI3 Heterojunction Membranes for Lightweight, Flexible, and Self-Powered Radiation Detection 三角形纹理MoS2/FAPbI3异质结膜用于轻量化、柔性和自供电辐射检测
IF 10.8 1区 材料科学
Nano Letters Pub Date : 2026-11-04 DOI: 10.1021/acs.nanolett.6c04241
Xiaomeng Zhao,Zhanpeng Wei,Yalu Li,Jialu Yu,Yuhao Zhao,Guocan Chen,Yichu Zheng,Yu Hou,Hua Gui Yang,Shuang Yang
{"title":"Triangular-Textured MoS2/FAPbI3 Heterojunction Membranes for Lightweight, Flexible, and Self-Powered Radiation Detection","authors":"Xiaomeng Zhao,Zhanpeng Wei,Yalu Li,Jialu Yu,Yuhao Zhao,Guocan Chen,Yichu Zheng,Yu Hou,Hua Gui Yang,Shuang Yang","doi":"10.1021/acs.nanolett.6c04241","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c04241","url":null,"abstract":"Perovskite materials are promising for optoelectronic applications, but developing lightweight and flexible detectors remains challenging due to interfacial incompatibility and mechanical brittleness. Here, we demonstrate a lightweight, flexible, and self-powered radiation detector based on the triangular-textured MoS2/FAPbI3 heterojunction membranes. We show that the freestanding MoS2 single-crystal membrane functions as both mechanical support and epitaxial template for the deposition of FAPbI3 films. The formation of a type II heterojunction at the MoS2/FAPbI3 interface induces a built-in electric field and facilitates charge carrier collection, which enables an efficient X-ray detection device with a high sensitivity of 23 145 μC Gy–1 cm–2 and a low detection limit of 177 nGy s–1 operated under zero bias. More importantly, the MoS2/FAPbI3 device weighs just 1/200 of that of FTO-based device with the same 4-μm-thick perovskite layer and withstands 1000 repeated bending cycles at a bending strain of 0.1154% without obvious performance degradation.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"21 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359291","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}
引用次数: 0
Termination-Dependent Surface Fermiology in the Intercalated Altermagnet CoNb4Se8 插层交变磁体CoNb4Se8的终端依赖表面费米学
IF 9.1 1区 材料科学
Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-19 DOI: 10.1021/acs.nanolett.6c01819
Pietro Maria Forcella, Alessandro De Vita, Matthew D. Watson, Sammar Tayyab, Chiara Bigi, Iulia Cojocariu, Marcin Szpytma, Matteo Jugovac, Andrea Locatelli, Tevfik Onur Menteş, My Bang Petersen, Paolo Moras, Polina M. Sheverdyaeva, Christopher Candelora, Ilija Zeljkovic, Federico Motti, Jill A. Miwa, Vincent Polewczyk, Matthieu Jamet, Matteo Calandra, Younghun Hwang, Davide Romanin, Federico Mazzola
{"title":"Termination-Dependent Surface Fermiology in the Intercalated Altermagnet CoNb4Se8","authors":"Pietro Maria Forcella,&nbsp;Alessandro De Vita,&nbsp;Matthew D. Watson,&nbsp;Sammar Tayyab,&nbsp;Chiara Bigi,&nbsp;Iulia Cojocariu,&nbsp;Marcin Szpytma,&nbsp;Matteo Jugovac,&nbsp;Andrea Locatelli,&nbsp;Tevfik Onur Menteş,&nbsp;My Bang Petersen,&nbsp;Paolo Moras,&nbsp;Polina M. Sheverdyaeva,&nbsp;Christopher Candelora,&nbsp;Ilija Zeljkovic,&nbsp;Federico Motti,&nbsp;Jill A. Miwa,&nbsp;Vincent Polewczyk,&nbsp;Matthieu Jamet,&nbsp;Matteo Calandra,&nbsp;Younghun Hwang,&nbsp;Davide Romanin,&nbsp;Federico Mazzola","doi":"10.1021/acs.nanolett.6c01819","DOIUrl":"10.1021/acs.nanolett.6c01819","url":null,"abstract":"<p>Altermagnets have recently gained attention for hostingsymmetry-enforcedspin-split bands despite zero net magnetization. Angle-resolved photoelectronspectroscopy (ARPES) offers direct access to their electronic structure.However, the intrinsic surface sensitivity of this technique complicatesthe identification of the observed features: Surface states can bemisinterpreted as the spin-split counterpart of bulk bands. This issuebecomes particularly relevant for layered intercalated systems, wheremicrometer-sized domains with distinct terminations often coexiston a cleaved surface. We discuss this scenario for CoNb<sub>4</sub>Se<sub>8</sub>, one of the first established layered altermagnets.Supported by density functional theory calculations, we employ micro-ARPESto probe individual domains and reveal two contrasting surface terminations.We identify Co- and Se-terminated domains with characteristic surfacestates arising from bulk-surface connectivity of the material. Ourwork shows that termination-dependent surface contributions are essentialfor the reliable spectroscopic identification of altermagnetism andfor assessing its presence across the family of layered materials.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"14813–14820"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149218889","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}
引用次数: 0
Electron-Beam-Assisted Formation of Simple-Cubic Silver 电子束辅助形成简单立方银
IF 9.1 1区 材料科学
Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-21 DOI: 10.1021/acs.nanolett.6c03635
Masaya Sakakibara, Hiroki Nada, Yuji Kunisada, Tomoya Yamazaki, Yuki Kimura
{"title":"Electron-Beam-Assisted Formation of Simple-Cubic Silver","authors":"Masaya Sakakibara,&nbsp;Hiroki Nada,&nbsp;Yuji Kunisada,&nbsp;Tomoya Yamazaki,&nbsp;Yuki Kimura","doi":"10.1021/acs.nanolett.6c03635","DOIUrl":"10.1021/acs.nanolett.6c03635","url":null,"abstract":"<p>Accessing crystal phases under nonequilibrium conditionsis a centralchallenge for expanding the landscape of materials. Simple-cubic (sc)structures are considered energetically unfavorable in elemental solidsand have previously been confirmed only in polonium. Here, we reportthe direct observation of a previously unrecognized sc-Ag formed underfar-from-equilibrium conditions. Using electron beam irradiation insidea high-resolution transmission electron microscope as a trigger, weinduced the radiolytic decomposition of silver iodide (AgI) and trackedthe in situ formation of silver crystals in real time. Continuousimaging revealed that sc-Ag formation strongly depends on the polymorphof the precursor and occurs selectively from metastable γ-AgI.The sc-Ag exhibited unusually high chemical reactivity, undergoinggradual oxidation into silver oxide under high-vacuum conditions whereconventional fcc-Ag remains stable. These findings demonstrate thatirreversible crystal formation pathways can kinetically stabilizecrystal structures inaccessible under near-equilibrium conditionsand extend a previously inaccessible structural limit of metallicbonding.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"14979–14986"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149226545","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}
引用次数: 0
Boosting NIR-II Luminescence via Ca2+-Formed Band Structure Modulation in Lanthanide-Doped Nanoparticles for Deep-Tissue Bioimaging 通过Ca2+形成的带结构调制镧系掺杂纳米颗粒促进NIR-II发光用于深部组织生物成像
IF 9.1 1区 材料科学
Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-21 DOI: 10.1021/acs.nanolett.6c02932
Zhiming Deng, Min Wei, Jiahao Chen, Aqiang Liu, Hanzhang Wang, Dandan Zheng, Zizhong Zhu, JingJin Chen, Songjun Zeng, Yao Huang
{"title":"Boosting NIR-II Luminescence via Ca2+-Formed Band Structure Modulation in Lanthanide-Doped Nanoparticles for Deep-Tissue Bioimaging","authors":"Zhiming Deng,&nbsp;Min Wei,&nbsp;Jiahao Chen,&nbsp;Aqiang Liu,&nbsp;Hanzhang Wang,&nbsp;Dandan Zheng,&nbsp;Zizhong Zhu,&nbsp;JingJin Chen,&nbsp;Songjun Zeng,&nbsp;Yao Huang","doi":"10.1021/acs.nanolett.6c02932","DOIUrl":"10.1021/acs.nanolett.6c02932","url":null,"abstract":"<p>Lanthanide-doped nanoparticles with near-infrared-II(NIR-II, 1000–1700nm) emission hold great promise for deep-tissue bioimaging, yet theirluminescence efficiency is often limited by conventional sensitizationpathways. Herein, we go beyond this conventional paradigm by introducinga Ca<sup>2+</sup>-formed band structure modulation in the host latticeto dramatically boost the NIR-II emission of lanthanide-doped nanoparticles.Rational doping of Ca<sup>2+</sup> ions restructures the energy levels,enabling the probe to efficiently capture excitation energy and channelit toward NIR-II-emitting lanthanide activators. This Ca<sup>2+</sup>-induced band structure modulation mechanism not only enhances theabsorption cross section but also accelerates energy transfer to theNIR-II-emitting states. As a result, the designed nanoprobes exhibitexcellent photostability and a high quantum yield. <em>In vivo</em> bioimaging demonstrates that the resulting nanoprobes enable deep-tissuevisualization with an improved signal-to-background ratio. This workestablishes a sensitization strategy that goes beyond conventionalapproaches, positioning lanthanide-based NIR-II probes as promisingcandidates for advanced biological imaging.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"14881–14889"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149226573","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}
引用次数: 0
Mica–Polyethylenimine Membranes for High-Efficiency pH-Responsive Nanofiltration Enabled by a Strongly Coupled Charge Flip 利用强耦合电荷翻转实现高效ph响应纳滤的云母-聚乙烯亚胺膜
IF 9.1 1区 材料科学
Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-22 DOI: 10.1021/acs.nanolett.6c04374
Mingbo Xie, Huacun Li, Yeqiu Zhao, Jingjing Deng, Jinkang Liu, Xu Yan, Qingwei Wang, Meiqing Shi, Liyuan Chai, Gao-Feng Han, Liyuan Zhang, Jong-Beom Baek
{"title":"Mica–Polyethylenimine Membranes for High-Efficiency pH-Responsive Nanofiltration Enabled by a Strongly Coupled Charge Flip","authors":"Mingbo Xie,&nbsp;Huacun Li,&nbsp;Yeqiu Zhao,&nbsp;Jingjing Deng,&nbsp;Jinkang Liu,&nbsp;Xu Yan,&nbsp;Qingwei Wang,&nbsp;Meiqing Shi,&nbsp;Liyuan Chai,&nbsp;Gao-Feng Han,&nbsp;Liyuan Zhang,&nbsp;Jong-Beom Baek","doi":"10.1021/acs.nanolett.6c04374","DOIUrl":"10.1021/acs.nanolett.6c04374","url":null,"abstract":"<p>ThepH-responsive two-dimensional nanofiltration membranes enabletunable separation, yet existing membranes suffer from weak chargegating. Herein, we prepared a mica–polyethylenimine membraneusing a “coupled charge flip” strategy. The membraneexhibits a strong charge flip (zeta potential from +46.1 to −36.4mV) across pH 2–12, originating from the synergy between polyethylenimine(zeta potential from +35.2 to +2.5 mV) and mica (zeta potential from−3.1 to −55.7 mV), yielding a charge-flip amplitude(82.5 mV) 41% greater than that of the best performing bipolar pH-responsivemembranes. This enables superior pH-dependent molecular gating (e.g.,methyl orange) with rejection ranging from 96.98 to 5.03% (pH 2–12)and a gating ratio of 19.28, which is 1.76 times that of the bestreported pH-responsive membranes, while maintaining a water permeanceof 155 L m<sup>–2</sup> h<sup>–1</sup> bar<sup>–1</sup> and stable cycling over eight pH switches. This work provides anew framework for designing pH-responsive nanofiltration membraneswith high gating ratios.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"15185–15195"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149230228","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}
引用次数: 0
Direct Experimental Quantification of Intrinsic Capacitive Properties of Monolayer Ti3C2Tx MXene 单层Ti3C2Tx MXene本征电容特性的直接实验定量
IF 9.1 1区 材料科学
Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-22 DOI: 10.1021/acs.nanolett.6c04313
Minghao Xu, Qingfeng Wu, Sixing Xu, Xiaohong Wang
{"title":"Direct Experimental Quantification of Intrinsic Capacitive Properties of Monolayer Ti3C2Tx MXene","authors":"Minghao Xu,&nbsp;Qingfeng Wu,&nbsp;Sixing Xu,&nbsp;Xiaohong Wang","doi":"10.1021/acs.nanolett.6c04313","DOIUrl":"10.1021/acs.nanolett.6c04313","url":null,"abstract":"<p>Ti<sub>3</sub>C<sub>2</sub>T<sub><em>x</em></sub> MXeneis widely employed in energy storage because of its unique interfacialcharge-storage properties. Understanding its intrinsic capacitiveproperties, especially the surface characteristics of a monolayerflake, is critical to optimizing device performance, but direct measurementat the monolayer level remains elusive. Here, we report, for the firsttime, direct experimental quantification of the intrinsic capacitanceof monolayer Ti<sub>3</sub>C<sub>2</sub>T<sub><em>x</em></sub> MXene by integrating optimized flake protection and parasitic-capacitance-shieldingstrategies. The quasi-static areal capacitance is 141 μF cm<sup>–2</sup> in acidic electrolytes and 61–74 μFcm<sup>–2</sup> in alkali-metal-ion electrolytes. Decouplingthe pseudocapacitive and electric-double-layer contributions by resolvingthe concentration dependence reveals that pseudocapacitance accountsfor ∼45% of the total in acidic electrolytes but &lt;10% inalkali-metal-ion electrolytes. Temperature-dependent kinetics showthat a lower proton-transfer activation energy facilitates the pseudocapacitivecharge storage. This work quantifies how redox and double-layer mechanismscoexist on a monolayer Ti<sub>3</sub>C<sub>2</sub>T<sub><em>x</em></sub> MXene surface and establishes a benchmark across the field.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"15177–15184"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149230233","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}
引用次数: 0
Breaking the Activity–Stability Trade-Off in Electrochemical NO2– Reduction to NH3 over a Robust Fe3C/CN Catalyst 在稳健的Fe3C/CN催化剂上打破NO2 -电化学还原为NH3的活性-稳定性权衡
IF 9.1 1区 材料科学
Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-23 DOI: 10.1021/acs.nanolett.6c04265
Xue-Feng Sun, Zhe Meng, Guo-Feng Qiu, Hai-Xia Zhong, Dong-Xue Liu, Quan-Qing Li, Pei-Yu Zang, Jun-Min Yan
{"title":"Breaking the Activity–Stability Trade-Off in Electrochemical NO2– Reduction to NH3 over a Robust Fe3C/CN Catalyst","authors":"Xue-Feng Sun,&nbsp;Zhe Meng,&nbsp;Guo-Feng Qiu,&nbsp;Hai-Xia Zhong,&nbsp;Dong-Xue Liu,&nbsp;Quan-Qing Li,&nbsp;Pei-Yu Zang,&nbsp;Jun-Min Yan","doi":"10.1021/acs.nanolett.6c04265","DOIUrl":"10.1021/acs.nanolett.6c04265","url":null,"abstract":"<p>Electrocatalytic nitrite reductioncoupled with plasma nitrogenoxidation offers a promising route for ambient ammonia synthesis,yet simultaneously achieving high activity and stability remains challengingowing to high kinetic barriers and catalyst deactivation. Here, wedevelop a robust hybrid electrocatalyst for active and durable nitritereduction to ammonia by leveraging Fe<sub>3</sub>C nanoparticles supportedon nitrogen-doped carbon nanosheets (Fe<sub>3</sub>C/CN). As a benefitfrom strong interactions between Fe<sub>3</sub>C and CN, this hybridcatalyst delivers a high faradaic efficiency of 89.6% at −0.7V versus a reversible hydrogen electrode (vs RHE) and a record ammoniayield rate of 16 956.5 mmol h<sup>–1</sup> g<sub>cat</sub><sup>–1</sup> at −0.9 V vs RHE, along with no apparentperformance decay over 1000 h of continuous electrolysis, underscoringits potential for sustainable electrochemical ammonia production.Mechanistic studies reveal that the synergistic effect between Fe<sub>3</sub>C nanoparticles and a nitrogen-doped carbon matrix enhancescatalytic performance by optimizing reactant adsorption, water dissociation,and promoting reaction kinetics.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"15159–15169"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149241854","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}
引用次数: 0
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