ACS Nano最新文献_第10页

Mapping Surface and Subsurface Atomic Structures of Au@Pd Core–Shell Nanoparticles in Three Dimensions

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-02-20 DOI: 10.1021/acsnano.4c17462

Yiheng Dai, Zhiheng Xie, Yao Zhang, Xuanxuan Du, Zezhou Li, Jisheng Xie, Zhen Sun, Jihan Zhou

{"title":"Mapping Surface and Subsurface Atomic Structures of Au@Pd Core–Shell Nanoparticles in Three Dimensions","authors":"Yiheng Dai, Zhiheng Xie, Yao Zhang, Xuanxuan Du, Zezhou Li, Jisheng Xie, Zhen Sun, Jihan Zhou","doi":"10.1021/acsnano.4c17462","DOIUrl":"https://doi.org/10.1021/acsnano.4c17462","url":null,"abstract":"Three-dimensional (3D) atomic arrangements in the surface and subsurface parts of nanomaterials are crucial for understanding their structure–functionality correlations. However, unveiling the required structure at such a resolution remains a challenge due to the lack of effective imaging and reconstruction techniques. Here, we determine the 3D atomic surface and subsurface structures of Au@Pd core–shell nanoparticles and study their correlations with electronic and surface chemical properties using atomic-resolution electron tomography (AET). We find that the intermixing of Au and Pd is the key factor that influences the surface and subsurface structure and quantitatively reveals its negative correlations with bond disorder and tensile strain. By applying spectroscopic and electrochemical measurements, we confirm that different surface structures modify the electronic and chemical properties at different Au/Pd ratios. These results not only shed light on the complex surface and subsurface structures of realistic nanomaterials but also deepen our understanding of structure–functionality correlations in nanostructures at the single-atom level.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"169 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143462334","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

Logic-Gated Modulation of Cell Migration via Mesoscale Mechanical Uncaging Effects

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-02-20 DOI: 10.1021/acsnano.4c16194

Deepak Karna, Shin Watanabe, Grinsun Sharma, Arpit Sharma, Yaorong Zheng, Ibuki Kawamata, Yuki Suzuki, Hanbin Mao

{"title":"Logic-Gated Modulation of Cell Migration via Mesoscale Mechanical Uncaging Effects","authors":"Deepak Karna, Shin Watanabe, Grinsun Sharma, Arpit Sharma, Yaorong Zheng, Ibuki Kawamata, Yuki Suzuki, Hanbin Mao","doi":"10.1021/acsnano.4c16194","DOIUrl":"https://doi.org/10.1021/acsnano.4c16194","url":null,"abstract":"Mesoscopic objects ranging from molecular machinery to cells are prevalent in nature. Unlike atomic and nanoscopic objects that do not have pronounced mechanical properties due to their small sizes, mesoscale substances demonstrate their unique mechanical features that can interfere with cell functions, particularly those with a mechanical nature such as cell migrations. Here, we demonstrate mechanical caging/uncaging effects in a DNA origami nanospring system that precisely controls cancer cell migrations. By leveraging DNA as a programming language, our work demonstrates the creation of logic gates (Boolean AND and OR gates) responsive to various miRNA inputs, resulting in mechanical and structural changes in DNA origami nanosprings serving as processors, which uncage the arginyl-glycyl-aspartate (RGD) ligands to interact with integrins on the cell membrane surface. The mechanical uncaging effect inhibits the migration of cancer cells. The strategy can be readily harnessed for targeted drug delivery with minimal off-target effects. Our proof-of-concept mesoscale DNA origami self-assembly highlights the potential for exquisite multimodal control of mechanical functions of cells with future applications in synthetic biology and precision medicine.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"2 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143462746","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

Bendable Phased-Array Ultrasound Transducer for Imaging on Curved Surfaces

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-02-20 DOI: 10.1021/acsnano.4c16028

Shizhen Yin, Han Zhang, Fangfang Shi, Yiming Chen, Chao Zhong, Rui Li, Yewang Su

{"title":"Bendable Phased-Array Ultrasound Transducer for Imaging on Curved Surfaces","authors":"Shizhen Yin, Han Zhang, Fangfang Shi, Yiming Chen, Chao Zhong, Rui Li, Yewang Su","doi":"10.1021/acsnano.4c16028","DOIUrl":"https://doi.org/10.1021/acsnano.4c16028","url":null,"abstract":"Flexible phased-array ultrasound transducers (PAUTs), promising for nondestructive testing in biomedical and industrial applications, are classified as stretchable or bendable. Stretchable PAUTs offer a superior solution for complex curved surfaces but face substantial variations in piezoelectric element pitches, particularly on surfaces with small radii, complicating position correction algorithms. Meanwhile, real-time measurement of the pitches remains a technical difficulty. In contrast, bendable PAUTs with limited variable pitches are currently more practical for engineering applications. This paper introduces an innovative bendable PAUT featuring a constant-pitch-preservation (CPP) design. It includes a flexible 12 × 12 piezo-composite element array bonded with silicone, allowing conformity to surfaces with varying curvatures while maintaining constant element pitches. This design enables accurate progressive time delays for precise ultrasound beam steering and focusing. Individual backing and matching blocks for each piezoelectric element enhance detection performance. Experimental results from pulse-echo inspections and sector scans validate its effectiveness in high-quality imaging.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"15 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143452209","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

Catalysis Enhanced by Catalyst Wettability

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-02-20 DOI: 10.1021/acsnano.4c18150

Yu Hui, Liang Wang, Feng-Shou Xiao

引用次数: 0

Superwettable Nanomaterials: Fabrication, Application, and Environmental Impact

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-02-20 DOI: 10.1021/acsnano.4c17420

Siyu Meng, Yao Lu

{"title":"Superwettable Nanomaterials: Fabrication, Application, and Environmental Impact","authors":"Siyu Meng, Yao Lu","doi":"10.1021/acsnano.4c17420","DOIUrl":"https://doi.org/10.1021/acsnano.4c17420","url":null,"abstract":"The increasing global concerns over energy consumption, environmental pollution, and sustainable development have sparked intensive research interest in advanced surface engineering solutions. This perspective critically reviews the development of superwettable surfaces as promising candidates for addressing these challenges. We analyze three key architectures that enable different levels of liquid repellency: micro/nano hierarchical structures for superhydrophobicity, re-entrant features for superoleophobicity, and doubly re-entrant designs for superomniphobicity. Recent developments have demonstrated significant progress in creating more environmentally conscious surfaces, including fluorine-free superhydrophobic textiles that reduce water and energy consumption in maintenance, energy-efficient smart windows with switchable wettability for building temperature regulation, and marine protective coatings that minimize chemical pollution. These advances contribute to environmental sustainability through multiple pathways: reduced resource consumption, improved energy efficiency, and decreased chemical pollution. However, challenges remain in achieving long-term durability, cost-effective fabrication, and comprehensive understanding of environmental impacts. This perspective provides insight into the current state of the field while highlighting the critical balance between performance optimization and environmental considerations in the development of next-generation superwettable materials.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"2 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143462749","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

Brightening of Optical Forbidden Interlayer Quantum Emitters in WSe2 Homobilayers

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-02-19 DOI: 10.1021/acsnano.4c14574

Na Liu, Licheng Xiao, Yuxing Liu, Yunong Tang, Yichen Ma, Seyed Sepehr Mohajerani, Yue Luo, James Hone, Stefan Strauf

{"title":"Brightening of Optical Forbidden Interlayer Quantum Emitters in WSe2 Homobilayers","authors":"Na Liu, Licheng Xiao, Yuxing Liu, Yunong Tang, Yichen Ma, Seyed Sepehr Mohajerani, Yue Luo, James Hone, Stefan Strauf","doi":"10.1021/acsnano.4c14574","DOIUrl":"https://doi.org/10.1021/acsnano.4c14574","url":null,"abstract":"Interlayer excitons (IXs) in layered van der Waals materials are promising for quantum technologies and fundamental studies such as exciton-polariton condensation due to their large permanent dipole moments. However, their indirect bandgap optical transition through the Q-K channel renders them momentum forbidden and thus less relevant for optical applications. Here, we demonstrate a method for brightening momentum indirect Q-K transitions from IX quantum emitters (QEs) in 2H-stacked bilayer WSe2 by simultaneously employing local strain and plasmonic nanocavity coupling. Initially, long T1 lifetimes up to 140 ns are indicative of momentum indirect transitions. Magneto-photoluminescence data show a striking bimodal distribution of g-factors between mono- and bilayer QEs, with a well-defined value of g = 9.5 for IX, highlighting their momentum indirect nature and decoupling from local strain variations. In addition, angle-resolved PL measurements reveal that local curvature on the nanostressor induces a dipole orientation tilt of the QEs, affecting cavity coupling. By embedding these strained QEs into plasmonic cavities, we achieve a 10-fold increase in emission intensity and a 24-fold enhancement in the T1 lifetime in the best case (12-fold average), leading to bright single-photon emission rates up to 1.45 ± 0.1 MHz into the first lens. Moreover, the demonstrated brightening of IX transitions allowed to push the emission wavelength reliably to around 810 nm that enables free-space quantum optical communication.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"1 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143443822","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

Deformation-Induced Multioptical Morphology Elastomer Constructed from Phosphorescent Nanospheres for Underwater Mechanical Sensing

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-02-19 DOI: 10.1021/acsnano.5c00828

Changxing Wang, Yayun Ning, Yifan Yue, Xiaoxiang Wen, Yuechi Xie, Guoli Du, Jianing Li, Jianing Li, Sen Yang, Xuegang Lu

{"title":"Deformation-Induced Multioptical Morphology Elastomer Constructed from Phosphorescent Nanospheres for Underwater Mechanical Sensing","authors":"Changxing Wang, Yayun Ning, Yifan Yue, Xiaoxiang Wen, Yuechi Xie, Guoli Du, Jianing Li, Jianing Li, Sen Yang, Xuegang Lu","doi":"10.1021/acsnano.5c00828","DOIUrl":"https://doi.org/10.1021/acsnano.5c00828","url":null,"abstract":"Combination of multioptical morphology, such as transmission, scattering, fluorescence (FL), and room-temperature phosphorescence (RTP), to build multisignal-integrated devices is highly attractive in future optical devices but extremely difficult owing to the poorly matched material design and construction principles. Here, we report a novel multioptical morphology elastomer (MOME) fabricated by encapsulating monodisperse RTP SiO2 nanoparticles (RTP-SiO2 NPs) with polydimethylsiloxane (PDMS). The switching behavior of optical signals is dependent on the deformation of MOME, such as stretching, bending, and squeezing. The MOME changes from a transparent state to a white scattered state under white light as the deformation increases, while the FL and RTP are significantly enhanced from the original weak state. During deformation, the air voids generated by the separation of RTP-SiO2 NPs and PDMS at the interface result in a refractive index mismatch, leading to a significant enhancement of light scattering and further causing deformation-induced self-scattering enhancement behavior in FL and RTP. Moreover, MOME also has intriguing modulation phenomena, such as dynamic deformation-regulated RTP during the decay process and solvent-deformation synergistically regulated optical switching behavior. On account of the outstanding optical properties, MOME is applied in daily visual monitoring of underwater pipelines, including displacement deviation, leakage, swelling, and localized anomalous protrusions. These findings provide important breakthroughs for the design of multioptical morphology integrated devices, demonstrating great potential for applications.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"47 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143452249","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

Fuzzy Band Structure of Quantum Dots by Bloch Orbital Expansion: Unconventional Insights into Geometric-Electronic Structure Relations

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-02-19 DOI: 10.1021/acsnano.4c17941

Zeger Hens, Jordi Llusar, Ivan Infante

{"title":"Fuzzy Band Structure of Quantum Dots by Bloch Orbital Expansion: Unconventional Insights into Geometric-Electronic Structure Relations","authors":"Zeger Hens, Jordi Llusar, Ivan Infante","doi":"10.1021/acsnano.4c17941","DOIUrl":"https://doi.org/10.1021/acsnano.4c17941","url":null,"abstract":"The extension of ab initio methods like density functional theory (DFT) to quantum dot (QD) geometries has enabled researchers to explore relationships between QD surface termination and electronic structure. However, fully utilizing the data from DFT requires novel classification methods for QD orbitals. Here, we identify relationships between QD geometry and electronic structure by transforming real-space QD orbitals into momentum-space using Bloch orbital expansion (BOE), yielding a fuzzy QD band structure. Comparing with bulk band structures, we show that truncated, unpassivated facets in III–V and II–VI QDs produce midgap orbitals derived from bulk surface orbitals, an identification challenging in real space. QDs with reconstructed facets, however, feature delocalized orbitals formed by superposition of bulk Bloch orbitals. Moreover, we demonstrate that atomistic core/shell QD models of relevant sizes with realistic surface termination exhibit fuzzy bands, allowing us to identify the core/shell band alignment, an analysis that is not possible in real space. These findings emphasize BOE as a vital tool for connecting computational and experimental insights in nanocrystal research.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"81 4 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143443793","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

Freeze–Thaw Imaging for Microorganism Classification Assisted with Artificial Intelligence 利用人工智能辅助微生物分类的冻融成像技术

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-02-19 DOI: 10.1021/acsnano.4c16949

Han Xie, Xubin Zhu, Kaiyu Chen, Zhilin Zhang, Jinzhi Liu, WenHui Wang, Chao Wan, Jieqing Wang, Di Peng, Yiwei Li, Peng Chen, Bi-Feng Liu

{"title":"Freeze–Thaw Imaging for Microorganism Classification Assisted with Artificial Intelligence","authors":"Han Xie, Xubin Zhu, Kaiyu Chen, Zhilin Zhang, Jinzhi Liu, WenHui Wang, Chao Wan, Jieqing Wang, Di Peng, Yiwei Li, Peng Chen, Bi-Feng Liu","doi":"10.1021/acsnano.4c16949","DOIUrl":"https://doi.org/10.1021/acsnano.4c16949","url":null,"abstract":"Fast and cost-effective microbial classification is crucial for clinical diagnosis, environmental monitoring, and food safety. However, traditional methods encounter challenges including intricate procedures, skilled personnel needs, and sophisticated instrumentations. Here, we propose a cost-effective microbe classification system, also termed freeze–thaw-induced floating pattern of AuNPs (FTFPA), coupled with artificial intelligence, which is capable of identifying microbes at a cost of $0.0023 per sample. Specifically, FTFPA utilizes AuNPs for coincubation with microbes, resulting in distinct patterns upon freeze–thawing due to their weak interaction. These patterns are digitized to train models that distinguish nine microbes in various tasks. The positive sample detection model achieved an F1 score of 0.976 (n = 194), while the multispecies classification task reached a macro F1 score of 0.859 (n = 1728). To address scalability and lightweight requirements across diverse classification scenarios, we categorized microbes based on species classification levels. The macro F1 score of the hierarchical model (n = 5184), order level model (n = 5184), Enterobacteriales level model (n = 2550), and Bacillales level model (n = 1974) was 0.854, 0.907, 0.958, and 0.843. In summary, our method is user-friendly, requiring only simple equipment, is easy to operate, and convenient, providing a platform for microbial identification.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"2 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143452246","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

Magnetic Micro/nanorobots in Cancer Theranostics: From Designed Fabrication to Diverse Applications

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-02-19 DOI: 10.1021/acsnano.4c10382

Lin Zhang, Shuren Wang, Yanglong Hou

{"title":"Magnetic Micro/nanorobots in Cancer Theranostics: From Designed Fabrication to Diverse Applications","authors":"Lin Zhang, Shuren Wang, Yanglong Hou","doi":"10.1021/acsnano.4c10382","DOIUrl":"https://doi.org/10.1021/acsnano.4c10382","url":null,"abstract":"Cancer poses a substantial threat and a serious challenge to public human health, driving the promotion of sophisticated technologies for cancer therapy. While conventional chemotherapy has bottlenecks such as low delivery efficiency, strong toxic side effects, and tumor enrichment barriers, magnetic micro/nanorobots (MNRs) emerge as promising therapeutic candidates that provide alternative strategies for cancer therapy. MNR is a kind of human-made machine that is micro- or nanosized, is reasonably designed, and performs command tasks through self-actuated or externally controlled propulsion mechanisms, which can be potentially applied in cancer theranostics. Here, this review first introduces the components that constitute a typical magnetic MNR, including the body part, the driving part, the control part, the function part, and the sensing part. Subsequently, this review elucidates representative fabrication methods to construct magnetic MNRs from top-down approaches to bottom-up approaches, covering injection molding, self-rolling, melt electrospinning writing, deposition, biotemplate method, lithography, assembling, 3D printing, and chemical synthesis. Furthermore, this review focuses on multiple applications of magnetic MNRs facing cancer diagnosis and treatment, encompassing imaging, quantification, drug release, synergy with typical therapies, cell manipulation, and surgical assistance. Then, this review systematically elaborates on the biocompatibility and biosafety of magnetic MNRs. Finally, the challenges faced by magnetic MNRs are discussed alongside future research directions. This review is intended to provide scientific guidance that may improve the comprehension and cognition of cancer theranostics through the platform of magnetic MNRs, promoting and prospering the practical application development of magnetic MNRs.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"197 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143452243","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