ACS Applied Nano Materials最新文献

{"title":"Combustion Separation Enables Repeated Recycling of Carbon Nanotubes from Ultra-lightweight Materials: Implications for Sound-Absorbing Applications","authors":"Toshihiro Ushida,&nbsp;Tomonaga Ueno","doi":"10.1021/acsanm.6c03673","DOIUrl":"https://doi.org/10.1021/acsanm.6c03673","url":null,"abstract":"<p>Carbon nanotubes (CNTs) are costly and energy-intensive to manufacture, making their recovery from single-use ultra-lightweight materials (ULMs) important for sustainable carbon-resource recycling. We show that solvent-free combustion separation, which exploits the thermal-stability difference between CNTs and a cellulose nanofiber matrix, enables CNT recovery over three successive fabrication−combustion−recovery cycles. X-ray photoelectron spectroscopy, Raman spectroscopy, and thermogravimetric analysis show that CNT crystallinity is largely preserved despite progressive sodium impurity accumulation and reduced thermal stability. Critically, sound-absorbing ULMs fabricated from the recycled CNTs retain acoustic performance equivalent to that of pristine CNTs, confirming the practical viability of this recycling route.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"9 44","pages":"20538–20542"},"PeriodicalIF":5.8,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149330324","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}

{"title":"Continuous Hydrothermal Synthesis of Mg-Doped Co3O4 Nanocubes: Precursors to Co/MgO Ammonia Decomposition Catalysts","authors":"Anh Binh Ngo,&nbsp;Frank Girgsdies,&nbsp;Liseth Duarte-Correa,&nbsp;Walid Hetaba,&nbsp;Olaf Timpe,&nbsp;Thomas Lunkenbein,&nbsp;Annette Trunschke","doi":"10.1021/acsanm.6c04223","DOIUrl":"https://doi.org/10.1021/acsanm.6c04223","url":null,"abstract":"<p>This study reports the continuous hydrothermal synthesis of Mg-doped Co₃O₄ spinel nanomaterials in supercritical water. By optimizing the synthesis parameters, crystalline Mg_<em>x</em>Co_{3−<em>x</em>}O₄ nanospinels (22−35 nm) were obtained directly at 391 °C with τ ≥ 0.1 s and a Mg/Co ratio of 0.25, without thermal post-treatment. Under these conditions, the formation of secondary (Mg,Co)(OH)₂ phases was suppressed. Structural refinement indicates a moderately inverse spinel lattice, with Mg²⁺ incorporation limited to <em>x</em> ≤ 0.24, consistent with the formation of a thermodynamically stable Mg_0.24Co_2.76O₄ spinel phase, as confirmed by HAADF-STEM-EDX analysis. Furthermore, the mixed oxides were evaluated as catalyst precursors for ammonia decomposition after reduction in H₂ at 600 °C to generate active metallic cobalt particles embedded in a MgO matrix. Catalytic studies revealed that the performance is determined by a balance between reducibility and cobalt dispersion. On the one hand, increasing Mg content decreases the extent of reduction of the precursor, leading to a lower fraction of metallic cobalt in the catalyst. On the other hand, higher Mg concentrations improve the dispersion of metallic Co⁰ and its interaction within the MgO matrix, thereby suppressing metal particle sintering. This study demonstrates that precise control of the synthesis enables a detailed understanding of the phase formation in Co−Mg mixed oxides and establishes a reliable strategy for the continuous synthesis of catalyst precursors that yield highly efficient, sintering-resistant catalysts.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"9 44","pages":"20866–20877"},"PeriodicalIF":5.8,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149330374","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}

{"title":"The Influence of Structural Compactness on the Microwave Absorption Performance of Metal−Organic Frameworks","authors":"Guodong Han,&nbsp;Chunyu Wang,&nbsp;Wanwan Yang,&nbsp;Yudeng Wang,&nbsp;Ruichao Zhu,&nbsp;Yuxiang Jia,&nbsp;Xiaokun Wang,&nbsp;Jiafu Wang","doi":"10.1021/acsanm.6c03917","DOIUrl":"https://doi.org/10.1021/acsanm.6c03917","url":null,"abstract":"<p>With the development of electronic information technology and the increasingly severe international situation, the research and exploration of microwave absorbing materials (MAMs) have become more and more important. In order to explore the influence of structural compactness on the microwave absorption performance, this paper chooses flaky porous carbon derived from Ni-BDC-MOF as the MAMs, which studied the effects of interlayer spacing, pyrolysis temperature (500 °C, 600 °C, and 700 °C), and Ni alloys on the absorption performance of composite materials. Among the three composite materials, the Ni-BDC-500 and Ni-BDC-600 flaky-shaped porous carbon with smaller compactness exhibits excellent absorption performance. The value of <em>RL</em>_min reflects the loss intensity of the composite material at a single frequency, while the effective absorption bandwidth (EAB) can more intuitively demonstrate the EMWs absorption capability. The <em>RL</em>_min of Ni-BDC-500 and Ni-BDC-600 is −47.5 dB and −45 dB at 8.9 and 8.2 GHz with the thickness of 2.9 and 3.1 mm, respectively. And the EAB reached 5.1 GHz (11.4−16.5 GHz) and 7 GHz (8−15 GHz) at the thickness of 2.1 mm and 2.5 mm, respectively, which covers the X-band and Ku-band. The inference offers the technical way for developing outstanding performance MAMs with smaller compactness in practical engineering applications.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"9 44","pages":"20792–20803"},"PeriodicalIF":5.8,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149330395","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}

{"title":"Ce and Ni Supported on N-Doped Carbon as a Diatomic Nanozyme and a Colorimetric Sensor for the Detection of Arsenite","authors":"Jinya Wei,&nbsp;Ya Ruan,&nbsp;Yaling Yang,&nbsp;Hong Li","doi":"10.1021/acsanm.6c03348","DOIUrl":"https://doi.org/10.1021/acsanm.6c03348","url":null,"abstract":"<p>In this work, a Ce/Ni metal−organic framework (MOF)-derived carbon-supported Ce-N_x and Ni-N_x dual-site Ce,Ni−N−C SAzyme for cascade catalysis and the H₂O₂ activation system is successfully constructed for detection of arsenate. Ce,Ni−N−C only displayed peroxidase (POD)-mimicking activity and 1.9- and 1.6-fold enhancement relative to the Ce-NC and Ni-NC SAzymes, respectively. When integrated with uricase (UOx) and Ce,Ni−N−C SAzyme, a cascade enzyme-nanozyme system was developed for selective and sensitive screening of arsenite (As(III)) with detection limits of 0.096 μg/L. The detection mechanism is based on As(III) irreversibly poisoning UOx against hydrolyzing uric acid, and the absorbance of blue oxidized 3,3′,5,5′-tetramethybenzidine at 654 nm is suppressed. Both Ce-N_x and Ni-N_x in Ce,Ni−N−C display a strong binding energy and electron-donating capability to promote H₂O₂ activation to generate highly hydroxyl radicals. Density functional theory (DFT) calculations reveal that the high POD-like activity of Ce,Ni−N−C is due to the isolated Ce-N_x and Ni-N_x sites and their synergy.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"9 44","pages":"20634–20642"},"PeriodicalIF":5.8,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149330400","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}

{"title":"Hierarchical Core−shell Nanoplatforms for pH-Triggered Drug Release and Enhanced Chemodynamic Cancer Therapy","authors":"Muhammad Asif,&nbsp;Sajid ur Rehman,&nbsp;Jing Zhang,&nbsp;Ikrma Amad,&nbsp;Mustafa Yilmaz,&nbsp;Kun Ma,&nbsp;Junfeng Wang","doi":"10.1021/acsanm.6c04833","DOIUrl":"https://doi.org/10.1021/acsanm.6c04833","url":null,"abstract":"<p>Chemodynamic therapy (CDT) has emerged as a promising noninvasive strategy that catalyzes the conversion of endogenous substrates into highly reactive hydroxyl radicals (•OH) to induce cancer cell death. However, its clinical application is limited by insufficient•OH generation and the complexity of the tumor microenvironment (TME). Herein, we developed a biodegradable PEGylated core shell nanoplatform loaded with doxorubicin (PMSC-DOX NCs) for pH-responsive drug delivery and enhanced CDT. The Co₉S₈ core provides additional cobalt-based redox-active sites, and the reversible Co²⁺/Co³⁺ redox couples contribute to H₂O₂ activation and•OH generation, thereby improving the CDT efficiency of the PMSC−DOX NCs. The PMSC-DOX NCs enable efficient DOX encapsulation, while PEGylation enhances colloidal stability and prolongs blood circulation. Under acidic TME conditions, the nanoplatform undergoes structural degradation, triggering controlled drug release. Meanwhile, MnO₂ reacts with endogenous H₂O₂ to generate O₂ and is reduced to Mn²⁺, which subsequently participates in a Fenton-like reaction to generate cytotoxic reactive oxygen species (ROS). In vitro studies demonstrate enhanced cellular uptake, prolonged intracellular retention, and significantly improved cytotoxicity as compared to free DOX. The synergistic effects of chemotherapy and CDT lead to amplified oxidative damage and enhanced cancer cell apoptosis. This work offers a promising strategy for designing multifunctional nanoplatforms for enhanced cancer therapy.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"9 44","pages":"20967–20979"},"PeriodicalIF":5.8,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149330401","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}

{"title":"Morphology-Directed Stabilization of PtZn Intermetallic Phases via Framework Ti Sites in TS-1 Zeolites for Robust Propane Dehydrogenation","authors":"Jie Liu,&nbsp;Dongwu Liu,&nbsp;Qiuqing Huang,&nbsp;Jiawei Zhou,&nbsp;Yingying Xie,&nbsp;Lingling Xiao,&nbsp;Baorong Wang,&nbsp;Yuanyuan Yue","doi":"10.1021/acsanm.6c04437","DOIUrl":"https://doi.org/10.1021/acsanm.6c04437","url":null,"abstract":"<p>The rational construction of stable Pt-based catalysts is crucial for achieving efficient propane dehydrogenation (PDH) at high temperatures, yet controlling the formation and stabilization of Pt-based intermetallic active phases remains challenging. Herein, framework Ti species in TS-1 zeolite were exploited as anchoring sites to stabilize PtZn bimetallic catalysts, and the influence of TS-1 morphology on the structural evolution and catalytic behavior of PtZn catalysts was systematically investigated. Comprehensive catalytic evaluations, structural characterizations, and kinetic analyses reveal that the morphology of TS-1 governs the accessibility of framework Ti sites and thereby regulates the formation of Pt₁Zn₁ intermetallic species. Compared with platelet-like TS-1, spherical TS-1 possesses a higher surface area, abundant intracrystalline mesoporosity, and fewer extra-framework Ti species, providing more effective anchoring sites for PtZn species and facilitating the construction of highly dispersed Pt₁Zn₁ intermetallic nanoparticles. Moreover, the hierarchical pore structure of spherical TS-1 promotes reactant/product diffusion and enhances the catalyst’s resistance to carbon deposition during PDH. Consequently, the optimized PtZn/TS-1-sphere catalyst delivers a superior initial propylene formation rate of 44.6 mol_C3H6·g_Pt⁻¹·h⁻¹ at 600 °C with a remarkably low deactivation rate constant of 0.0035 h⁻¹ over 50 h. In contrast, platelet-like TS-1 containing abundant extra-framework Ti species exhibits inferior metal anchoring capability and limited PtZn intermetallic formation. This work offers insights into the morphology-directed regulation of zeolite-based metal interfaces for designing highly stable dehydrogenation catalysts.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"9 44","pages":"20932–20942"},"PeriodicalIF":5.8,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149330282","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}

{"title":"Isoelectric Point at the Nano−Bio Interface Dictates the Humoral Immune Responses of Vaccine Adjuvants","authors":"Ge Yu,&nbsp;Linbo Zhang,&nbsp;Wenqi Yang,&nbsp;Ning Zhang,&nbsp;Huiyang Wang,&nbsp;Changying Xue,&nbsp;Bingbing Sun","doi":"10.1021/acsanm.6c04328","DOIUrl":"https://doi.org/10.1021/acsanm.6c04328","url":null,"abstract":"<p>The isoelectric point is an intrinsic physicochemical property of nanoparticles that determines antigen adsorption and drug delivery efficacy. However, its impact on shaping immune responses remains poorly understood. Here, we engineered Alhydrogel adjuvants with tunable isoelectric points and systematically evaluated their immunological effects. Modulating the isoelectric point significantly influenced the adsorption of human papillomavirus (HPV)-like particles (VLPs), with adjuvants possessing slightly acidic isoelectric points producing significantly stronger humoral immune responses in mice. Mechanistic investigations showed that these adjuvants enhanced antigen uptake, accelerated antigen disappearance from the injection site, and increased CD80 expression on dendritic cells within draining lymph nodes. These identify the isoelectric point as a key regulator of adjuvant activity and establish a rational design principle for developing next-generation vaccine adjuvants with enhanced efficacy.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"9 44","pages":"20895–20906"},"PeriodicalIF":5.8,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149330320","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}

{"title":"Composition- and Phase-Engineered Nanoscale WS2(1−x)Te2x Alloyed Films for Broadband Photodetection and Surface-Enhanced Raman Sensing toward Molecular Recognition","authors":"Chia-Chen Chung,&nbsp;Pei-Hsuan Wang,&nbsp;Yu-Ren Peng,&nbsp;Sujith Lakshan Cooray,&nbsp;K. M. M. D. K. Kimbulapitiya,&nbsp;Po-Chien Lai,&nbsp;Rovi Angelo B. Villaos,&nbsp;Feng-Chuan Chuang,&nbsp;Yu-Lun Chueh","doi":"10.1021/acsanm.6c03427","DOIUrl":"https://doi.org/10.1021/acsanm.6c03427","url":null,"abstract":"<p>Two-dimensional transition metal dichalcogenides (TMDs) offer strong light−matter interactions and tunable electronic properties, but the fixed bandgap of binary WS₂ limits its optical response to the visible region. Alloy engineering provides an effective pathway to overcome this constraint by enabling continuous modulation of the band structure and controlled 2H−1T′ phase transitions. In particular, Te alloying in WS₂ introduces substantial lattice distortion, narrows the bandgap, and enhances charge-transfer interactions, making WS_{2(1−<em>x</em>)}Te_2<em>x</em> promising for broadband photodetection and SERS sensing. However, achieving uniform and composition-controlled alloys is challenging using conventional chemical vapor deposition (CVD) methods. Here, we develop a chemical vapor reaction (CVR) strategy for composition and phase engineering of nanoscale WS_{2(1−<em>x</em>)}Te_2<em>x</em> alloy films through controlled S-to-Te chalcogen exchange. Using this approach, we obtain WS_{2(1−<em>x</em>)}Te_2<em>x</em> films spanning 2H- to 1T′-dominant regimes, with optimized photodetector performance in 2H-WS_1.14Te_0.86 and strong SERS enhancement in 1T′-WS_0.41Te_1.59. The alloys further demonstrate effective detection of melamine and <em>Pseudomonas aeruginosa</em> with excellent chemical stability. These results establish CVR-grown WS_{2(1−<em>x</em>)}Te_2<em>x</em> alloys as a versatile platform for broadband optoelectronics and molecular sensing.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"9 44","pages":"20643–20655"},"PeriodicalIF":5.8,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149330304","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}

{"title":"Dendritic PtFe@RuRhMo Self-Amplifying Oxidative Nanocatalysis via Metabolic Hijacking Overcoming Hypoxia−Glutathione Resistance in Triple-Negative Breast Cancer","authors":"Jin-Yu Li,&nbsp;Yu Mao,&nbsp;Xia Wu,&nbsp;Jia-Bao Wang,&nbsp;Ye Chen,&nbsp;Ai-Jun Wang,&nbsp;Tiejun Zhao,&nbsp;Liang Wu,&nbsp;Jiu-Ju Feng","doi":"10.1021/acsanm.6c03903","DOIUrl":"https://doi.org/10.1021/acsanm.6c03903","url":null,"abstract":"<p>Triple-negative breast cancer (TNBC) therapy faces a paradox: Reactive oxygen species (ROS)-generating nanozyme depletes oxygen (O₂) and triggers glutathione (GSH) defense, reducing efficacy in hypoxic tumors. To resolve this problem, we developed an enzyme by coupling glucose oxidase (GOx)-mediated glucose depletion with ROS generation and GSH consumption. Dendritic core−shell PtFe@RuRhMo nanocrystals were synthesized, integrating catalase-, peroxidase-, and glutathione oxidase-like activities, accompanied by functionalization with GOx and doxorubicin (DOX). The nanozyme exhibited a threefold lower Michaelis constant for H₂O₂ than horseradish peroxidase (<em>K</em>_m = 0.186 mM), depleted 95.87% of GSH in a cell-free solution within 15 min, and induced 62.3% apoptosis in 4T1 cells under high-glucose conditions. In vivo, the nanodrug achieved marked tumor suppression in all treated mice while exhibiting minimal toxicity. This design precisely modulates the tumor microenvironment in aggressive cancers. The cascade informs multienzyme-based cancer therapy. Future work will optimize the PEGylation density and evaluate long-term biodistribution in larger animal models.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"9 44","pages":"20777–20791"},"PeriodicalIF":5.8,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149330343","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}

{"title":"Electronic-Thermal Engineering of Semiconducting and Metallic Single-Walled Carbon Nanotube Field Emitters via Matrix-Driven Thermionic Field Emission","authors":"Yoshinori Sato,&nbsp;Akihisa Kuroda,&nbsp;Akimi Komaguchi,&nbsp;Yoji Omoto,&nbsp;Norihiro Shimoi,&nbsp;Masashi Saitoh,&nbsp;Mitsuru Watanabe,&nbsp;Yoshitaka Fujimoto,&nbsp;Takashi Itoh,&nbsp;Hirokazu Katsui,&nbsp;Takashi Goto,&nbsp;Kenichi Motomiya,&nbsp;Kazuyuki Tohji","doi":"10.1021/acsanm.6c03918","DOIUrl":"https://doi.org/10.1021/acsanm.6c03918","url":null,"abstract":"<p>Single-walled carbon nanotubes (SWCNTs) are promising candidates for field emission (FE) sources. However, the relative superiority of semiconducting SWCNTs (S-SWCNTs) versus metallic SWCNTs (M-SWCNTs) under operating conditions remains controversial. Here, we demonstrate that FE performance can be strategically tailored via “electronic-thermal engineering” by exploiting the interplay between the density of states (DOS) in the nanotube and localized Joule heating. Evaluations using “sandwiched” and “blended” devices incorporating carbonized polymer matrices with controlled resistivities indicated that M-SWCNTs initiated electron emission at lower fields regardless of the device architecture because their electrons occupy the Fermi level. In low-resistivity blended configurations, where the matrix acts as an effective heat sink, M-SWCNTs retained their superiority via cold FE, achieving a turn-on field of 6.21 V/μm. Conversely, in high-resistivity sandwich architectures, a remarkable performance reversal occurred at higher applied fields: S-SWCNTs ultimately outperformed M-SWCNTs with lower turn-on and threshold fields of 6.38 and 7.44 V/μm, respectively (compared with 6.96 and 8.22 V/μm for M-SWCNTs, respectively). This inversion originates from high interfacial and junction resistances that induce intense localized Joule heating. M-SWCNTs efficiently dissipate heat via ballistic transport. By contrast, significant localized temperature increase in S-SWCNTs alters the Fermi−Dirac distribution, populating the high-DOS conduction band and triggering thermionic FE. Linear Fowler−Nordheim plots confirmed that quantum tunneling remains dominant, consistent with the Murphy−Good theory. These findings establish internal thermal management as a critical design principle for optimizing next-generation vacuum microelectronics.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"9 44","pages":"20766–20776"},"PeriodicalIF":5.8,"publicationDate":"2026-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149330399","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}