ACS Nano最新文献

{"title":"High-Performance and Stable Perovskite/Organic Tandem Solar Cells Enabled by Interconnecting Layer Engineering","authors":"Songtao Liu, Lu Hao, Jiangkai Yu, Yao Xu, Yuejia Dou, Juxuan Xie, Yazhong Wang, Kai Zhang, Fei Huang, Yong Cao","doi":"10.1021/acsnano.4c11888","DOIUrl":"https://doi.org/10.1021/acsnano.4c11888","url":null,"abstract":"Perovskite/organic tandem solar cells (PO-TSCs) have recently attracted increasing attention due to their high efficiency and excellent stability. The interconnecting layer (ICL) is of great importance for the performance of PO-TSCs. The charge transport layer (CTL) and the charge recombination layer (CRL) that form the ICL should be carefully designed to enhance charge carrier extraction and promote charge carrier recombination balance from the two subcells. Here, we propose an effective strategy to optimize the ICL by using [2-(9<i>H</i>-carbazol-9-yl)ethyl]phosphonic acid (2PACz) to modify the poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) as the hole transport layer (HTL) in the ICL. It is found that the coverage state of 2PACz on the PEDOT:PSS significantly affects the performance of PO-TSCs and can be regulated by adjusting the concentration of the 2PACz solution. The PEDOT:PSS/2PACz structure facilitates effective charge carrier extraction from the organic solar cells to the CRL. Herein, for the PO-TSCs, this strategy results in an efficient and balanced charge carrier recombination in the ICL and also allows a thinner PEDOT:PSS with reduced parasitic absorption. As a result, the PO-TSC achieves a power conversion efficiency (PCE) of 25.26%, much higher than the control device (PCE of 23.57%), and better stability. This work demonstrates an effective approach to achieving high-performance PO-TSCs through ICL engineering.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"112 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874000","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}

{"title":"Gesture-Interactive Dynamic Holo-Display via Topography Flexible Metasurfaces","authors":"Zejing Wang, Zhe Li, Chengwei Wan, Shuai Wan, Chenjie Dai, Guoxing Zheng, Zhongyang Li","doi":"10.1021/acsnano.4c13569","DOIUrl":"https://doi.org/10.1021/acsnano.4c13569","url":null,"abstract":"Heading toward the next-generation intelligent optical device, the meta-optics active tunability is one of the most desirable properties to expand its versatility beyond the traditional optical devices. Despite its advances via various tunable approaches, the encoding freedom of tuning capability still critically restricts its widespread engagement and dynamics in real-life applications. Here, we present a gesture-interactive scheme by topography flexible metasurfaces (TFMs) to expand the encoding freedom for the tuning capability. Through regulating different surface topographies, the potential tuning degree of freedom (DoF) has been fully explored to dynamically display/encrypt up to 16 independent holographic images, exceeding the state-of-the-art tuning DoF. Such topography flexibility is interactively tuned with gesture triggers, manual bending, and other large-area repeatable controlling methods to extract and display the respective holographic images. We envision that this research stimulates active meta-device innovation and suggests potential applications in next-generation interactive displays, information storage and encryption, and wearable optical devices.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"670 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880218","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}

{"title":"Bicontinuous Block Copolymer Microparticles through Hydrogen-Bonding-Mediated Dual Phase Separation between Polymer Segments and Fluorinated Additives","authors":"Min Ren, Mengmeng Zhang, Zaiyan Hou, Xinghao Yan, Lianbin Zhang, Jiangping Xu, Jintao Zhu","doi":"10.1021/acsnano.4c13152","DOIUrl":"https://doi.org/10.1021/acsnano.4c13152","url":null,"abstract":"Bicontinuous microparticles have advanced transport, mechanical, and electrochemical properties and show promising applications in energy storage, catalysis, and other fields. However, it remains a great challenge to fabricate bicontinuous microparticles of block copolymers (BCPs) by controlling the microphase separation due to the extremely narrow region of a bicontinuous structure in the phase diagram. Here, we demonstrate a strategy to balance the phase separation of BCPs and fluorinated additives at different length scales in emulsion droplets, providing a large window to access bicontinuous microparticles. The key point is to simultaneously introduce contradictory attractive–repulsive interactions between poly(4-vinylpyridine)-containing BCPs and carboxylated perfluorinated additives. Hydrogen bonding between poly(4-vinylpyridine) and carboxyl groups, as an attractive interaction, directs the microphase separation between BCPs and additives. Meanwhile, the repulsive interaction due to the high immiscibility between perfluoroalkyl residues and BCPs induces macrophase separation. The compromise of attractive–repulsive interactions triggers the formation of bicontinuous microparticles in a large phase space. In addition, the vulnerable nature of hydrogen bonding provides a flexible route for reversibly shaping BCP assemblies. This work establishes a platform for fabricating structured BCP microparticles of which the structures are hardly accessible through traditional solution self-assembly.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"60 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874021","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}

{"title":"Mechano-Graded Contact-Electrification Interfaces Based Artificial Mechanoreceptors for Robotic Adaptive Reception","authors":"Hao Lei, Yixin Cao, Guoxuan Sun, Peihao Huang, Xiyin Xue, Bohan Lu, Jiawei Yan, Yuxi Wang, Eng Gee Lim, Xin Tu, Yina Liu, Xuhui Sun, Chun Zhao, Zhen Wen","doi":"10.1021/acsnano.4c14285","DOIUrl":"https://doi.org/10.1021/acsnano.4c14285","url":null,"abstract":"Triboelectrification-based artificial mechanoreceptors (TBAMs) is able to convert mechanical stimuli directly into electrical signals, realizing self-adaptive protection and human–machine interactions of robots. However, traditional contact–electrification interfaces are prone to reaching their deformation limits under large pressures, resulting in a relatively narrow linear range. In this work, we fabricated mechano-graded microstructures to modulate the strain behavior of contact–electrification interfaces, simultaneously endowing the TBAMs with a high sensitivity and a wide linear detection range. The presence of step regions within the mechanically graded microstructures helps contact–electrification interfaces resist fast compressive deformation and provides a large effective area. The highly sensitive linear region of TBAM with 1.18 V/kPa can be effectively extended to four times of that for the devices with traditional interfaces. In addition, the device is able to maintain a high sensitivity of 0.44 V/kPa even under a large pressure from 40 to 600 kPa. TBAM has been successfully used as an electronic skin to realize self-adaptive protection and grip strength perception for a commercial robot arm. Finally, a high angle resolution of 2° and an excellent linearity of 99.78% for joint bending detection were also achieved. With the aid of a convolutional neural network algorithm, a data glove based on TBAMs realizes a high accuracy rate of 95.5% for gesture recognition in a dark environment.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"148 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874022","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}

{"title":"Correction to “Direct Excitation Transfer in Plasmonic Metal-Chalcopyrite Hybrids: Insights from Single Particle Line Shape Analysis”","authors":"Tianhong Ouyang, Yi-Chen Chen, Koustav Kundu, Xingjian Zhong, Yixin Mei, Akilesh Nalluri, Allison M. Dennis, Björn M. Reinhard","doi":"10.1021/acsnano.4c16477","DOIUrl":"https://doi.org/10.1021/acsnano.4c16477","url":null,"abstract":"The caption of Figure 4 in the text of our publication contains an error. Figure 4 does not contain a plot of all Γ_ET(ω) data as stated in the caption but of Γ_ET(ω) data for all AgNP@CuFeS₂ preparations with an average Γ_ET &gt; 0.3 eV. For completeness, we include below the Γ_ET(ω) plot for all AgNP@CuFeS₂ preparations. The interpolation (black line) contains a maximum at ω = 2.469 eV, which is nearly identical to the value of 2.489 eV that was determined from the original figure with the narrower Γ_ET distribution and does not change the interpretation of the data. We apologize for any confusion this error may have created. All authors have approved this correction. Figure 4. Γ_ET (blue points) for all AgNP@CuFeS₂ conditions plotted as a function of the resonance frequency ω_res. A polynomial interpolation is included as a black line. The red line shows the simulated scattering spectrum of an individual CuFeS₂ NC (<i>n</i>_r = 1.5000). This article has not yet been cited by other publications.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"31 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867536","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}

{"title":"Green Carbon Dots/CaCO3/Abamectin Colloidal Pesticide Formulation for Safer and More Effective Pest Management","authors":"Chuang Chen, Guopeng Teng, Weicheng Shen, Yijun Lu, Yuwei Jin, Xue Yuan, Kang Chen, Yue Yuan, Zhengyan Wu, Jia Zhang","doi":"10.1021/acsnano.4c12707","DOIUrl":"https://doi.org/10.1021/acsnano.4c12707","url":null,"abstract":"An ideal green leaf-deposited pesticide formulation should offer advantages such as good water dispersibility, strong foliar affinity, sustained or controlled release of active ingredients, photostability and rain-fastness, minimal nontarget toxicity, use of nontoxic organic solvents, and degradable adjuvants. In line with this objective, we present green preparation of a colloidal pesticide formulation using optimized lysine-derived carbon dots (LysCDs)-modified CaCO₃ (LysCDs/CaCO₃) particles as the carrier and abamectin (Abm) as the active ingredient. The loading capacity of abamectin in this colloidal pesticide (LysCDs/CaCO₃/Abm) is 1.7 to 2.1 times higher than that of its counterpart (CaCO₃/Abm) prepared without LysCDs, which is attributed to the increased specific surface area and pore volume of LysCDs/CaCO₃ particles. Due to the acid-induced degradation of CaCO₃, the release of abamectin for LysCDs/CaCO₃/Abm is accelerated under weakly acidic conditions, which is accompanied by the release of Ca²⁺ ions and the fluorescence changes of LysCDs. The incorporation of LysCDs enhances the photostability and foliar adhesiveness of this colloidal pesticide, resulting in the highest degree of foliar retention when exposed to ultraviolet (UV) light or rainfall, compared to free-form abamectin and CaCO₃/Abm. This results in the best performance of pest control on <i>Plutella xylostella</i> for LysCDs/CaCO₃/Abm in both indoor and outdoor tests. Nontarget biocompatibility evaluations show that LysCDs/CaCO₃/Abm exhibits lower acute toxicity to zebrafish and earthworms than free-form abamectin. In addition, this colloidal pesticide is favored by the minimal residue of the adjuvant material after abamectin release, which is converted into harmless Ca²⁺ ions, CO₂, and LysCDs. Therefore, this work designs a safer and more effective colloidal pesticide formulation to deliver abamectin with minimal adjuvant residue, realizing its trajectory as basically “circular and green”.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"18 797 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867538","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}

{"title":"Biomimetic “Trojan Horse” Fibers Modulate Innate Immunity Cascades for Nerve Regeneration","authors":"Jie Wu, Jincheng Tang, Lichen Zhang, Wei Wang, Ziang Li, Liang Zhou, Xinzhao Jiang, Yiyang Huang, Qiangqiang Guo, Wenbo Wang, Zhouye Ding, Feng Cai, Kun Xi, Yong Gu, Liang Chen","doi":"10.1021/acsnano.4c12036","DOIUrl":"https://doi.org/10.1021/acsnano.4c12036","url":null,"abstract":"Neutrophil membrane vesicles (NMVs) have been successfully applied to control the inflammatory cascade after spinal cord injury (SCI) by acting as an inflammatory factor decoy to front-load the overall inflammation regulatory window; however, the mechanisms by which NMVs regulate macrophage phenotypic shifts as well as their outcomes have rarely been reported. In this study, we demonstrated the “efferocytosis-like” effect of NMVs endocytosed by macrophages, supplementing the TCA cycle intermediate metabolite α-KG by promoting glutamine metabolism, which in turn facilitates oxidative phosphorylation and inhibits the NF-κB signaling pathway to reprogram inflammatory macrophages to the pro-regenerative phenotype. Based on these findings, a “Trojan horse” composite fiber scaffold was constructed; this comprised a carboxylated poly-<span>l</span>-lactic acid shell encapsulated with NMVs and a core loaded with brain-derived neurotrophic factor to spatiotemporally modulate the inflammatory microenvironment by 39.23% and sustainably promote nerve regeneration by 85.67%. In vivo experiments further confirmed the effect of NMV-coated fiber scaffolds on the regulation of early innate immune inflammation and the continuous promotion of nerve regeneration. This study not only further unravels the mechanism of neutrophil membrane–macrophage interactions but also provides a strategy for coordinating inflammatory reprogramming and nerve regeneration following SCI.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"177 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870079","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}

{"title":"Reconfiguring van der Waals Metal–Semiconductor Contacts via Selenium Intercalation/Deintercalation Post-Treatment","authors":"Gihyeon Kwon, Hyeon-Sik Kim, Kwangsik Jeong, Sewoong Oh, Dajung Kim, Woochan Koh, Hyunjun Park, Seongil Im, Mann-Ho Cho","doi":"10.1021/acsnano.4c15117","DOIUrl":"https://doi.org/10.1021/acsnano.4c15117","url":null,"abstract":"To achieve the commercialization of two-dimensional (2D) semiconductors, the identification of an appropriate combination of 2D semiconductors and three-dimensional (3D) metals is crucial. Furthermore, understanding the van der Waals (vdW) interactions between these materials in thin-film semiconductor processes is essential. Optimizing these interactions requires precise control over the properties of the vdW interface through specific pre- or post-treatment methods. This study utilizes Se-environment annealing as a post-treatment technique, which allows for modification of the vdW gap distance and enhancement of the stability of the interfacial structure through the process of Se intercalation and deintercalation at the 2D–3D interface. The depth of Se intercalation and deintercalation is adjusted by varying the temperature and duration of the postannealing process in an Se environment. This precise control over the process enables the effective metallization of 2D semiconductors. The results indicate that expanding the vdW gap and stabilizing the interface structure through this post-treatment significantly improve the metal contact properties in devices such as field-effect transistors and photovoltaic Schottky diodes by minimizing metal-induced gap states, thus reducing Fermi level pinning. The application of Se intercalation and deintercalation techniques achieves an exceptionally low contact resistance of 773 Ω·μm between p-type WSe₂ and Au. Additionally, the integration of doping-free WSe₂ complementary metal-oxide-semiconductor (CMOS) circuits using Se-environment annealing and blocking layers is demonstrated, establishing a promising advancement in semiconductor technology.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"24 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867534","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}

{"title":"HfO2 Memristor-Based Flexible Radio Frequency Switches","authors":"Shih-Chieh Chen, Yu-Tao Yang, Yun-Chien Tseng, Kun-Dong Chiou, Po-Wei Huang, Jia-Hao Chih, Hsien-Yang Liu, Tsung-Te Chou, Yang-Yu Jhang, Chien-Wei Chen, Chun-Hsiao Kuan, E Ming Ho, Chao-Hsin Chien, Chien-Nan Kuo, Yu-Ting Cheng, Der-Hsien Lien","doi":"10.1021/acsnano.4c11846","DOIUrl":"https://doi.org/10.1021/acsnano.4c11846","url":null,"abstract":"Flexible and wearable electronics are experiencing rapid growth due to the increasing demand for multifunctional, lightweight, and portable devices. However, the growing demands of interactive applications driven by the rise of AI reveal the inadequate connectivity of current connection technologies. In this work, we successfully leverage memristive technology to develop a flexible radio frequency (RF) switch, optimized for 6G-compatible communication systems and adaptable to flexible applications. The flexible RF switch demonstrates a low insertion loss (2 dB) and a cutoff frequency exceeding 840 GHz, and performance metrics are maintained after 10⁶ switching cycles and 2500 mechanical bending cycles, showing excellent reliability and robustness. Furthermore, the RF switch is fully integrable with a photolithography-processable polyimide (PSPI) substrate, enabling efficient 2.5D integration with other RF components, such as RF antennas and interconnects. This technology holds significant promise to advance 6G communications in flexible electronics, offering a scalable solution for high-speed data transmission in next-generation wearable devices.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"52 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857678","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}

{"title":"Zeeman Effect-Boosted Spin-Polarized Band Splitting in Diluted Magnetic Photocatalysis Semiconductors for Efficient CO2 Photoreduction","authors":"Shuhui Xia, Xin Yin, Yuehui Chen, Liang Zhang, Jianyong Yu, Bin Ding, Jianhua Yan","doi":"10.1021/acsnano.4c14424","DOIUrl":"https://doi.org/10.1021/acsnano.4c14424","url":null,"abstract":"Magnetic field regulation is an effective strategy to improve the photocatalytic activity of magnetic semiconductor photocatalysts, but it is not suitable for widely used nonmagnetic photocatalytic semiconductors. Here, we report a Zeeman effect-driven spin-polarized band splitting phenomenon in diluted magnetic semiconductors that show efficient photocatalytic CO₂ reduction under visible-light irradiation. A flexible Ni²⁺-doped BaTiO₃ nanofiber film is used as the diluted magnetic semiconductor model to prove this concept. The interstitial Ni²⁺ dopant induces the spin-polarized bands in Ni-BaTiO₃ nanofibers to split under light excitation, generating spin-excited electrons and holes. This Zeeman effect induced by the magnetic field is more obvious since it intensifies the spin-polarized band splitting and generates more spin-excited electrons and holes, suppressing the carrier recombination and extending the carrier lifetime for CO₂ photoreduction. As a result, the evolution rates of CO and CH₄ are as high as 86.47 and 96.06 μmol/g/h under a small magnetic field of 50 mT. The proposed mechanism of Zeeman effect-driven spin-polarized band splitting is feasible to improve the CO₂ photoreduction efficiency of broadly applied diluted magnetic semiconductors.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"31 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857762","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}