ACS Nano最新文献_第4页

Artificial Tolerogenic Dendritic Cell-Derived Vesicles Prepared by High-Pressure Homogenization for Potent Immunotherapy of Type 1 Diabetes 高压均质制备耐受性树突状细胞来源的人工囊泡用于1型糖尿病的有效免疫治疗

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-05-07 DOI: 10.1021/acsnano.4c17712

Rong Sun, Huaxing Dai, Chenlu Yao, Heng Wang, Bingbing Wu, Xiaoyu Yu, Fang Xu, Chao Wang

{"title":"Artificial Tolerogenic Dendritic Cell-Derived Vesicles Prepared by High-Pressure Homogenization for Potent Immunotherapy of Type 1 Diabetes","authors":"Rong Sun, Huaxing Dai, Chenlu Yao, Heng Wang, Bingbing Wu, Xiaoyu Yu, Fang Xu, Chao Wang","doi":"10.1021/acsnano.4c17712","DOIUrl":"https://doi.org/10.1021/acsnano.4c17712","url":null,"abstract":"Tolerogenic dendritic cells (tolDCs) have emerged as a promising immunotherapeutic approach for type 1 diabetes (T1D) by promoting immune tolerance and modulating autoimmune responses against pancreatic β cells. However, their clinical applications are challenged by various limitations including cell viability, scalability, and manufacturing complexities. As an alternative, tolDC-derived extracellular vesicles could address some limitations of cell-based therapies, though their application in T1D treatment remains unexplored. Here, we developed the artificial tolDC-derived vesicles (ACDVtolDC) by a high-pressure homogenization approach, which retained immunosuppressive properties with high yield production and stability that improved the scalability for potential clinical use. In both chemically induced (STZ) and spontaneous (NOD) T1D mouse models, ACDVtolDC exhibited abilities to reduce T cell infiltration by approximately 4-fold in the pancreas and re-establish the balance between regulatory and cytotoxic T cells to a healthy baseline, thereby preserving β cells and ameliorating T1D onset. Additionally, the therapeutic effect of ACDVtolDC was superior to that of the tolDC treatment. These findings highlighted ACDVtolDC as a potent vesicle-based immunotherapy for T1D, offering practical advantages over traditional tolDC therapies.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"31 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143920925","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

Twisted Light-Driven Exciton Dissociation for Enhanced Photoresponse in Monolayer MoS2 Transistors 扭曲光驱动激子解离增强单层MoS2晶体管的光响应

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-05-07 DOI: 10.1021/acsnano.4c18318

Ye-Ru Chen, Kristan Bryan Simbulan, Guan-Hao Peng, Yu-Chen Chang, I-Tong Chen, Han-Chieh Lo, Shao-Yu Chen, Shun-Jen Cheng, Ting-Hua Lu, Yann-Wen Lan

{"title":"Twisted Light-Driven Exciton Dissociation for Enhanced Photoresponse in Monolayer MoS2 Transistors","authors":"Ye-Ru Chen, Kristan Bryan Simbulan, Guan-Hao Peng, Yu-Chen Chang, I-Tong Chen, Han-Chieh Lo, Shao-Yu Chen, Shun-Jen Cheng, Ting-Hua Lu, Yann-Wen Lan","doi":"10.1021/acsnano.4c18318","DOIUrl":"https://doi.org/10.1021/acsnano.4c18318","url":null,"abstract":"Two-dimensional monolayer transition metal dichalcogenides (TMDs) exhibit strong exciton binding energy due to Coulomb interactions, making exciton dissociation challenging. However, the use of orbital angular momentum (OAM) light, or twisted light, enables momentum-conserving transitions, potentially enhancing exciton dissociation and improving optoelectronic performance. In this work, we simultaneously explore the optical and electrical characteristics of a field-effect transistor (FET) fabricated from molybdenum disulfide (MoS2) when exposed to OAM-carrying illumination. A significant reduction in exciton luminescence rates is observed, whereas a substantial enhancement in the device’s conductance is detected as the OAM order of light is increased. Light with OAM effectively slows exciton recombination, as confirmed by time-resolved photoluminescence, while concurrently strengthening the probability of exciton dissociation. This shift in the balance between exciton recombination and dissociation is inferred to as the driving force behind the improved free carriers in the device. In addition, light-carrying OAM slightly improves the material’s light absorption by facilitating additional transitions that were normally inaccessible. The implications of our study extend to the potential improvement in the performance of phototransistors, showcasing the multifaceted benefits of harnessing OAM light for advanced applications in optoelectronics.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"44 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143920927","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

Highly Conductive, Adhesive and Biocompatible Hydrogel for Closed-Loop Neuromodulation in Nerve Regeneration 用于神经再生闭环神经调节的高导电性、黏附性和生物相容性水凝胶

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-05-07 DOI: 10.1021/acsnano.5c03336

Tianfei Chu, Yuanjie Xiao, Huiting Lai, Liangjing Shi, Yin Cheng, Jing Sun, Zhen Pang, Shihui Cheng, Kunkun Zhao, Zhengrun Gao, Ranran Wang

{"title":"Highly Conductive, Adhesive and Biocompatible Hydrogel for Closed-Loop Neuromodulation in Nerve Regeneration","authors":"Tianfei Chu, Yuanjie Xiao, Huiting Lai, Liangjing Shi, Yin Cheng, Jing Sun, Zhen Pang, Shihui Cheng, Kunkun Zhao, Zhengrun Gao, Ranran Wang","doi":"10.1021/acsnano.5c03336","DOIUrl":"https://doi.org/10.1021/acsnano.5c03336","url":null,"abstract":"Developing conductive hydrogels has led to significant advancements in bioelectronics, especially in the realms of neural interfacing and neuromodulation. Despite this progress, the synthesis of hydrogels that simultaneously exhibit superior mechanical stretchability, robust bioadhesion, and high conductivity remains a significant challenge. Traditional approaches often resort to high filler concentrations to achieve adequate electrical conductivity, which detrimentally affects the hydrogel’s mechanical integrity and biocompatibility. In this study, we present a multifunctional conductive hydrogel, designated as PAACP, which is engineered from a polyacrylamide–poly(acrylic acid) (PAM–PAA) matrix and enhanced with polydopamine-modified carbon nanotubes (CNT-PDA). This composition ensures an exceptional conductivity of 9.52 S/m with a remarkably low carbon nanotube content of merely 0.33 wt %. The hydrogel exhibits excellent mechanical properties, including low tensile modulus (∼100 kPa), high stretchability (∼1000%), and high toughness (7.33 kJ m–2). Moreover, the synergistic action of catechol and NHS ester functional groups provides strong tissue adhesive strength (107.14 kPa), ensuring stable bioelectronic–neural interfaces. As a cuff electrode, it enables suture-free implantation and bidirectional electrical communication with the sciatic nerve, which is essential for neuromodulation. Leveraging these capabilities, our hydrogel is integrated into a closed-loop system for sciatic nerve repair, significantly enhancing real-time feedback driven nerve regeneration and accelerating functional recovery. This work offers a strategy for dynamic, personalized neuromodulation in nerve repair and clinical applications.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"106 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143920931","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

Smart Polymer Microspheres: Preparation, Microstructures, Stimuli-Responsive Properties, and Applications. 智能聚合物微球：制备，微观结构，刺激响应特性和应用。

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-05-07 DOI: 10.1021/acsnano.5c00998

Tao Guo,Lan Luo,Linlin Wang,Fenghua Zhang,Yanju Liu,Jinsong Leng

引用次数: 0

Atomic-Scale Interface Engineering to Construct Highly Efficient Electrocatalysts for Advanced Lithium-Sulfur Batteries. 构建先进锂硫电池高效电催化剂的原子级界面工程。

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-05-07 DOI: 10.1021/acsnano.5c00855

Bo Jiang,Chenghao Zhao,Yu Zhang,Sheng Gu,Naiqing Zhang

{"title":"Atomic-Scale Interface Engineering to Construct Highly Efficient Electrocatalysts for Advanced Lithium-Sulfur Batteries.","authors":"Bo Jiang,Chenghao Zhao,Yu Zhang,Sheng Gu,Naiqing Zhang","doi":"10.1021/acsnano.5c00855","DOIUrl":"https://doi.org/10.1021/acsnano.5c00855","url":null,"abstract":"Heterostructure materials integrating the unique physical and chemical properties of each heterogeneous component are highly promising for optimizing lithium-sulfur batteries. However, precisely regulating the interface microstructures of heterostructures at the atomic scale still lacks effective means, and the law of interface microstructures affecting the properties of heterostructures is not yet clearly understood. Herein, an atomic-scale regulation strategy is presented to construct heterostructure materials containing the high-energy Fe2O3-CeO2 interfaces with specific atomic arrangements using a high-index faceted Fe2O3 octadecahedron as the substrate for the heterogrowth of CeO2 nanocrystals, which effectively improves the redox kinetics of sulfur species in lithium-sulfur batteries. Experimental and theoretical calculations reveal that the strong interface interactions, characterized by plentiful electron transfer between Fe2O3 and CeO2, render the high-energy Fe2O3-CeO2 interfaces with good adsorption properties and high catalytic activity for various sulfur species. Attributed to the abundant high-energy Fe2O3-CeO2 interfaces, the Fe2O3-CeO2 octadecahedra effectively inhibit the shuttling of polysulfide and significantly accelerate the interconversion of sulfur species. The incorporation of these high-activity electrocatalysts enables the batteries to deliver superb long-term cyclic stability with a low average capacity fading of 0.016% per cycle over 2000 cycles at 2.0 C. Even at a low electrolyte/sulfur ratio of 4.3 μL mg-1, the batteries with a sulfur loading of 8.79 mg cm-2 maintain an areal capacity as high as 7.53 mAh cm-2 after 100 cycles. This study achieves the precise atomic-scale regulation of the interface microstructures, deepening the comprehending of the electrocatalytic conversion of sulfur species associated with the interface microstructures while delivering valuable guidance for the rational construction of advanced electrocatalysts for Li-S batteries.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"1 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143915218","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

Mechanism of S-Palmitoylation in Polystyrene Nanoplastics-Induced Macrophage Cuproptosis Contributing to Emphysema through Alveolar Epithelial Cell Pyroptosis s-棕榈酰化在聚苯乙烯纳米塑料诱导巨噬细胞铜沉降中通过肺泡上皮细胞热亡促进肺气肿的机制

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-05-07 DOI: 10.1021/acsnano.5c02892

Ning Bu, Qing Du, Tian Xiao, Zhenhao Jiang, Jiaheng Lin, Weiyong Chen, Bowen Fan, Jingyuan Wang, Haibo Xia, Cheng Cheng, Qian Bian, Qizhan Liu

{"title":"Mechanism of S-Palmitoylation in Polystyrene Nanoplastics-Induced Macrophage Cuproptosis Contributing to Emphysema through Alveolar Epithelial Cell Pyroptosis","authors":"Ning Bu, Qing Du, Tian Xiao, Zhenhao Jiang, Jiaheng Lin, Weiyong Chen, Bowen Fan, Jingyuan Wang, Haibo Xia, Cheng Cheng, Qian Bian, Qizhan Liu","doi":"10.1021/acsnano.5c02892","DOIUrl":"https://doi.org/10.1021/acsnano.5c02892","url":null,"abstract":"More than microplastics, nanoplastics may pose a greater toxic effect on humans due to their unique physicochemical properties. Currently, research on lung diseases caused by respiratory exposure to nanoplastics is scarce, with epigenetic mechanisms warranting further investigation. In the present study, we exposed rats to polystyrene nanoplastics (PS-NPs) via an oral-nasal exposure system and found that PS-NPs exposure resulted in emphysema. Mechanistically, PS-NPs entered macrophages and competitively bound to sigma nonopioid intracellular receptor 1 (SIGMAR1), leading to an increase in free zDHHC palmitoyltransferase 14 (zDHHC14). This, in turn, caused elevated palmitoylation of solute carrier family 31 member 1 (SLC31A1) in macrophages, inhibiting its ubiquitination and degradation, thereby enhancing SLC31A1 expression. The increased expression of SLC31A1 promoted cuproptosis of macrophages and elevated tumor necrosis factor-α (TNF-α) secretion, which activated the NLR family pyrin domain containing 3/matrix metallopeptidase 9 (NLRP3/MMP-9) pathway in alveolar epithelial cells (AECs). This process mediated pyroptosis and degradation of extracellular matrix (ECM), resulting in the destruction of alveolar structure and development of emphysema. The findings demonstrate a previously unknown molecular mechanism by which PS-NPs induce emphysema. The findings have implications for the prevention and treatment of respiratory system damage caused by nanoparticles.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"14 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143920930","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

Reconfigurable All-Nitride Magneto-Ionics 可重构全氮磁离子

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-05-07 DOI: 10.1021/acsnano.5c04013

Zhijie Chen, Christopher J. Jensen, Chen Liu, Yijing Liu, Christy J. Kinane, Andrew John Caruana, Alexander J. Grutter, Julie A. Borchers, Xixiang Zhang, Kai Liu

{"title":"Reconfigurable All-Nitride Magneto-Ionics","authors":"Zhijie Chen, Christopher J. Jensen, Chen Liu, Yijing Liu, Christy J. Kinane, Andrew John Caruana, Alexander J. Grutter, Julie A. Borchers, Xixiang Zhang, Kai Liu","doi":"10.1021/acsnano.5c04013","DOIUrl":"https://doi.org/10.1021/acsnano.5c04013","url":null,"abstract":"The rapid advancement of generative artificial intelligence has significantly increased the demand for both energy and data storage. Magneto-ionics, which utilizes ionic motion to control magnetism, often driven by an electric field in heterostructures, has gained significant attention for its potential to enable energy-efficient modulation of magnetic properties with large effects. This study proposes a CMOS-compatible solid-state magneto-ionic system composed of all-Mn-nitrides and demonstrates that nitrogen ionic motion can induce reversible phase transitions between ferrimagnetic and antiferromagnetic Mn nitrides. This magnetic phase transition is manifested in dramatic changes in the resultant exchange bias effect, which can be increased by over an order of magnitude when more nitrogen is introduced into the nitrides during deposition and subsequently reduced by over 70% when nitrogen is taken out of the nitrides through post-annealing. Additionally, voltage-induced nitrogen ionic motion can lead to reversible changes in saturation magnetization and the exchange bias effect by 23% and 0.1 T (16%) at 5 K, respectively. These findings highlight the characteristics of this all-Mn-nitride system as an industrially viable and environmentally sustainable platform, offering tunable magnetic properties and energy-efficient operation and potential for magnetic field immunity.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"12 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143915929","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

Superlow-Noise Quasi-2D Vertical Tunneling Tactile Sensor for Fine Liquid Dynamic Recognition. 用于精细液体动态识别的超低噪声准二维垂直隧道触觉传感器。

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-05-07 DOI: 10.1021/acsnano.4c18377

Guanyin Cheng,Tianhui Sun,Hailin Gao,Yungen Wu,Jingyang Li,Wen Xiong,Xin Li,Huabin Wang,Yu Tian,Dacheng Wei,Jiahu Yuan,Dapeng Wei

{"title":"Superlow-Noise Quasi-2D Vertical Tunneling Tactile Sensor for Fine Liquid Dynamic Recognition.","authors":"Guanyin Cheng,Tianhui Sun,Hailin Gao,Yungen Wu,Jingyang Li,Wen Xiong,Xin Li,Huabin Wang,Yu Tian,Dacheng Wei,Jiahu Yuan,Dapeng Wei","doi":"10.1021/acsnano.4c18377","DOIUrl":"https://doi.org/10.1021/acsnano.4c18377","url":null,"abstract":"To achieve high-precision intelligent tactile recognition and hyperfine operation tasks, tactile sensors need to possess the ability to discriminate minute pressures within the range of human perception. However, due to the lack of methodologies for noise suppression, existing tactile sensing mechanisms are inferior in pressure resolution. In this work, we emulate the structure of biological fingertip Merkel cells to develop a quasi-2D vertical tunneling tactile sensor based on conformal graphene nanowalls-hexagonal boron nitride-graphene (CGNWs-hBN-Gr) van der Waals (vdWs) heterojunctions. Tunneling channel modulation of this heterojunction simulates the ion gating mechanism of piezo (PZ) proteins and greatly reduces the noise power spectral density (PSD) to 2.22 × 10-24 A2/Hz at 10 Hz, which is 3 orders of magnitude lower than that of the sensor without an hBN layer. The noise equivalent pressure (NEPr) was as low as 7.96 × 10-3 Pa. Multiscale conformal micro- and nanostructured CGNWs further promote an ultrahigh sensitivity of 1.99 × 106 kPa-1, and the sensor demonstrates a high signal-to-noise ratio (SNR) of 68.76 dB and a resolution of 1/10,000. The minimum identifiable loading of 2 Pa at a pressure of 20 kPa is less than the sensing threshold value of human skin. An ultraresolution sensor could be used to evaluate different liquid properties by detecting complex hydrodynamic changes during artificial touching of liquids via a fingertip. Combined with the TacAtNet model, this sensor distinguishes between different liquids with a resolution accuracy of 98.1% across five distinct alcohol concentrations.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"14 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143915225","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

Anion Redistribution in Solvation Structure Enables a Stable Graphite Cathode in Dual-Ion Batteries 溶剂化结构中的阴离子重分布使双离子电池中石墨阴极稳定

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-05-07 DOI: 10.1021/acsnano.5c03112

Xin Hu, Wen Sun, Anbin Zhou, Ziyue Wen, Huirong Wang, Zhengqiang Hu, Tianyang Xue, Yongxin Huang, Li Li, Feng Wu, Renjie Chen

{"title":"Anion Redistribution in Solvation Structure Enables a Stable Graphite Cathode in Dual-Ion Batteries","authors":"Xin Hu, Wen Sun, Anbin Zhou, Ziyue Wen, Huirong Wang, Zhengqiang Hu, Tianyang Xue, Yongxin Huang, Li Li, Feng Wu, Renjie Chen","doi":"10.1021/acsnano.5c03112","DOIUrl":"https://doi.org/10.1021/acsnano.5c03112","url":null,"abstract":"The electrochemical properties of anions as carriers in graphite-based dual-ion batteries (GDIBs) play an important role in achieving long cycling stability and high-rate performance. However, anion behavior in the electrolyte was neglected in previous studies. To balance high voltage and fast conduction, the anion behavior after introducing diluent in a highly concentrated electrolyte|high concentrated electrolyte (HCE) to form locally highly concentrated electrolyte|locally high concentrated electrolyte (LHCE) in GDIBs was deeply investigated. In contrast to the highly aggregated coordinated ion pairs in the HCE, more free anions can be attained in the LHCE without significant reunion. These free anions can rapidly migrate to the electrode surface under the electric field drive and then intercalate between graphite layers with a lower energy barrier. Meanwhile, an inorganic-rich interfacial layer with rapid ion conduction and a thinner thickness can be formed to prevent further decomposition of anions and stabilize the structure of the cathode. As a consequence, the dual-graphite DIBs achieved a superior capacity of 98.3% after 1000 cycles at a high rate of 200 mA g–1 in LHCE, and the corresponding pouch cells exhibited a stable cycling process. This work advances the understanding of anion chemistry, enabling the regulation of the anion status to enhance the electrochemical performance of GDIBs.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"68 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143920810","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

Charge Transfer of Metal Porphyrins on a NaCl Thin Film Observed by Scanning Tunneling Microscopy in the Transport Gap. 用扫描隧道显微镜观察金属卟啉在NaCl薄膜上在输运间隙中的电荷转移。

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-05-07 DOI: 10.1021/acsnano.5c01235

Li-Qing Zheng,Abhishek Grewal,Kelvin Anggara,Fábio J R Costa,Christopher C Leon,Klaus Kuhnke,Klaus Kern

{"title":"Charge Transfer of Metal Porphyrins on a NaCl Thin Film Observed by Scanning Tunneling Microscopy in the Transport Gap.","authors":"Li-Qing Zheng,Abhishek Grewal,Kelvin Anggara,Fábio J R Costa,Christopher C Leon,Klaus Kuhnke,Klaus Kern","doi":"10.1021/acsnano.5c01235","DOIUrl":"https://doi.org/10.1021/acsnano.5c01235","url":null,"abstract":"Elucidating the electronic structure of organic molecules in contact with a dielectric layer is essential to understanding and controlling many important processes, such as catalysis, photochemistry, and electroluminescence. However, this challenge calls for a detailed characterization of molecule-dielectric contacts on the atomic scale. Here, we employ scanning tunneling microscopy (STM) at low temperature (4 K) in combination with ab initio calculations to investigate the subnanometer-scale electronic states of photoactive molecules on a dielectric surface. For platinum and palladium octaethylporphyrin (PtOEP and PdOEP) adsorbed on few layers of NaCl on a metal substrate, our STM imaging of them in the energy gap between the frontier orbitals demonstrates their high sensitivity to the local environment, namely, adsorption site and applied voltage. Our calculations reveal that the states in this energy gap originate from combinations of molecular orbitals far from the Fermi level and that they are affected by the extent of molecule-surface partial charge transfer, which is tuned by adsorption site and voltage in the tunnel junction.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"47 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143915221","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