ACS NanoPub Date : 2025-05-07DOI: 10.1021/acsnano.5c00673
Zhizheng Sheng, Jian Zhou, Yangdong Wang, Wenhua Fu, Ke Du, Weihua Wang, Kaiqi Nie, Jianqi Hao, Yahong Zhang, Binhang Yan, Wei Fan, Jiawei Teng, Zaiku Xie
{"title":"Nanozeolite-Driven Gear-Catalysis Enabling Sequential Methanol-to-Aromatics Conversion","authors":"Zhizheng Sheng, Jian Zhou, Yangdong Wang, Wenhua Fu, Ke Du, Weihua Wang, Kaiqi Nie, Jianqi Hao, Yahong Zhang, Binhang Yan, Wei Fan, Jiawei Teng, Zaiku Xie","doi":"10.1021/acsnano.5c00673","DOIUrl":"https://doi.org/10.1021/acsnano.5c00673","url":null,"abstract":"Controlling diffusion and elementary reaction pathways to achieve high selectivity and stability has been a long-standing challenge in heterogeneous catalysis. Here, we develop a “gear-catalyst” system that spatially and kinetically decouples the methanol-to-aromatics (MTA) reaction into two sequential steps: methanol-to-olefins and olefins-to-aromatics. We show that nanoZSM-5 (high Si/Al ratio, ∼100 nm particle size) serves as a highly efficient smaller “gear” for rapid olefin generation and accelerated mass transfer, while micrometer-sized Zn-exchanged ZSM-5 (Zn/Z5) acts as the larger “gear” to promote aromatization. This gear-like synergy enables precise control of both reaction kinetics and diffusion pathways, reducing undesired overalkylation and coke formation. Consequently, our catalyst delivers a remarkable increase in aromatic yield with an 85% selectivity for benzene, toluene, and xylene in a single pass. In situ spectroscopic studies reveal that the smaller nanoZSM-5 particles modulate local olefin concentrations and prevent early aromatic buildup, thereby extending catalyst lifetimes by suppressing hard-coke formation. The resulting “two-center” mechanism, in which olefins shuttle between adjacent acid and metal sites, demonstrates how a simple physical mixing strategy can decouple complex multistep pathways. Our findings underscore the potential of gear-catalysis concepts to tackle similar diffusion-reaction mismatches in high-value chemical transformations, from syngas-to-aromatics to CO<sub>2</sub>-based fuel synthesis.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"48 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143920928","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}
ACS NanoPub Date : 2025-05-06DOI: 10.1021/acsnano.4c16628
Yan Liu, Xinyue Ran, Guangdong Zhou, Yingbin Liu, Weihong Tan
{"title":"Multivalent Aptamer Assembly Enhances Tumor-Specific Degradation of Transforming Growth Factor-Beta to Remodel the Stromal and Immunosuppressive Cancer Microenvironment","authors":"Yan Liu, Xinyue Ran, Guangdong Zhou, Yingbin Liu, Weihong Tan","doi":"10.1021/acsnano.4c16628","DOIUrl":"https://doi.org/10.1021/acsnano.4c16628","url":null,"abstract":"Extracellular proteins like transforming growth factor-β (TGFβ) are crucial enforcers in the development of cancer stroma and the tumor immunosuppressive microenvironment. Lysosome-targeting chimera-mediated protein degradation appeared as a promising tool for extracellular signal interference but was limited by several lysosome-trafficking receptors and inadequate in vivo degradation efficiency. Here, we designed a multivalent aptamer assembly with a universal pattern to drag extracellular proteins (e.g., TGFβ1) for lysosome degradation with high tumor specificity. By accelerating cell recognition-internalization and lysosomal delivery, the assembly promoted TGFβ blockade and degradation in pancreatic cancer cells and pancreatic stellate cells (PSCs). In vivo, the assembly exhibited highly tumor-specific accumulation and prolonged retention, which resulted in efficient TGFβ inhibition, stromal remodeling, and reversed polarization of immunosuppressive cells in the tumor microenvironment, as well as synergic therapeutic effects when combined with gemcitabine or ovalbumin. Therefore, this study provides a feasible strategy to construct a multivalent aptamer assembly for tumor-specific extracellular protein degradation, after remodeling the tumor stromal and immunosuppressive microenvironment in a manner that enhances the effects of cancer chemotherapy and immunotherapy.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"19 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910728","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":"Identifying In Situ Activity and Selectivity of Oxygen Reduction Catalysts at the Subparticle Level","authors":"Yufei Yao, Hongyang Qu, Zehui Sun, Yequan Chen, Shenglong Yang, Wei Ma","doi":"10.1021/acsnano.5c01902","DOIUrl":"https://doi.org/10.1021/acsnano.5c01902","url":null,"abstract":"Oxygen reduction reaction (ORR) plays a crucial role in both the chemical and energy industries. Despite substantial advancements in theoretical, computational, and experimental studies, identifying both the in situ activity and selectivity in ORR electrocatalysis remains a major challenge. Here, using a suite of correlative operando scanning electrochemical probe and electrochemiluminescence microscopy techniques, we establish a link between the morphological structure and the local ORR activity and selectivity of single Au and Au@Pt platelets at the subparticle level. It is clearly shown that the edge facets of Au and Au@Pt platelets exhibit higher activity for 4e<sup>–</sup> ORR compared to basal planes, whereas the basal planes of both Au and Au@Pt platelets demonstrate superior 2e<sup>–</sup> selectivity relative to the edge facets. These findings deepen our understanding of ORR activity and selectivity across different facets at the subparticle level, which offers valuable guidance for the rational design of highly efficient ORR electrocatalysts.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"116 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143915930","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":"Reproducible Transpalpebral Intraocular Pressure Sensing Enabled by Low-Energy-Barrier Ion Pumping","authors":"Xueyang Ren, Xuefei Zhu, Xiaodong Shao, Wen Yang, Yanmei Meng, Shiyu Chen, Yannan Wang, Jianqing Li, Qin Jiang, Benhui Hu","doi":"10.1021/acsnano.5c02762","DOIUrl":"https://doi.org/10.1021/acsnano.5c02762","url":null,"abstract":"Elevated intraocular pressure (IOP) is a major risk factor for blindness in glaucoma patients, highlighting the critical need for continuous IOP monitoring. While traditional transpalpebral tonometers (TTs) circumvent corneal contact by adopting Goldmann applanation principles through impulsive corneal flattening forces, their measurement accuracy is inherently compromised by eyelid-induced cushion effects. In contrast, parallel-plate capacitive sensors employ constant compressive loading upon the eyelid, achieving palpebral compaction to mitigate the cushion effects. More recently, ion-pump-based capacitive sensors have emerged as promising alternatives, particularly due to their enhanced sensitivity. Nevertheless, these sensors exhibit sharp sensitivity deterioration at extended measurement ranges (0–10 kPa). This operational constraint originates from the strong hydrogen bond energies (between confining matrices and ions) and rigid block copolymer matrices’ steric hindrance. To address these limitations, we developed a transpalpebral tonometer featuring low-energy-barrier ion pumps, incorporating (3-aminopropyl)triethoxysilane (APTES)-silanized liquid metal nanoparticles (LM NPs) as confining matrices and an ionic liquid as an ion donor. The low-energy barrier arises from (1) weaker hydrogen bonds between the N–H of APTES and the F of the ionic liquid and (2) reduced crystallinity in the elastomeric matrices induced by LM NPs. Our sensor achieves a sensitivity of 24.88 kPa<sup>–1</sup> with maintained linearity over 0–85 kPa. In vivo animal trials over 120 min validated its continuous IOP monitoring capability, reliably detecting elevated IOP states and demonstrating clinical potential for glaucoma management.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"74 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910780","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}
ACS NanoPub Date : 2025-05-06DOI: 10.1021/acsnano.4c13478
Wei-Chi Chiu, Sougata Mardanya, Robert Markiewicz, Jouko Nieminen, Bahadur Singh, Tugrul Hakioglu, Amit Agarwal, Tay-Rong Chang, Hsin Lin, Arun Bansil
{"title":"Strain-Induced Charge Density Waves with Emergent Topological States in Monolayer NbSe2","authors":"Wei-Chi Chiu, Sougata Mardanya, Robert Markiewicz, Jouko Nieminen, Bahadur Singh, Tugrul Hakioglu, Amit Agarwal, Tay-Rong Chang, Hsin Lin, Arun Bansil","doi":"10.1021/acsnano.4c13478","DOIUrl":"https://doi.org/10.1021/acsnano.4c13478","url":null,"abstract":"Emergence of topological states in strongly correlated systems, particularly two-dimensional (2D) transition-metal dichalcogenides, offers a platform for manipulating electronic properties in quantum materials. However, a comprehensive understanding of the intricate interplay between correlations and topology remains elusive. Here we employ first-principles modeling to reveal two distinct 2 × 2 charge density wave (CDW) phases in monolayer 1H-NbSe<sub>2</sub>, which become energetically favorable over the conventional 3 × 3 CDWs under modest biaxial tensile strain of about 1%. These strain-induced CDW phases coexist with numerous topological states characterized by <i></i><span style=\"color: inherit;\"></span><span data-mathml='<math xmlns=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><msub><mrow><mi mathvariant=\"double-struck\">Z</mi></mrow><mrow><mn>2</mn></mrow></msub></math>' role=\"presentation\" style=\"position: relative;\" tabindex=\"0\"><nobr aria-hidden=\"true\"><span style=\"width: 1.253em; display: inline-block;\"><span style=\"display: inline-block; position: relative; width: 1.139em; height: 0px; font-size: 110%;\"><span style=\"position: absolute; clip: rect(1.31em, 1001.14em, 2.503em, -999.997em); top: -2.156em; left: 0em;\"><span><span><span style=\"display: inline-block; position: relative; width: 1.139em; height: 0px;\"><span style=\"position: absolute; clip: rect(3.128em, 1000.68em, 4.151em, -999.997em); top: -3.974em; left: 0em;\"><span><span style=\"font-family: STIXMathJax_DoubleStruck;\">ℤ</span></span><span style=\"display: inline-block; width: 0px; height: 3.98em;\"></span></span><span style=\"position: absolute; top: -3.804em; left: 0.741em;\"><span><span style=\"font-size: 70.7%; font-family: STIXMathJax_Main;\">2</span></span><span style=\"display: inline-block; width: 0px; height: 3.98em;\"></span></span></span></span></span><span style=\"display: inline-block; width: 0px; height: 2.162em;\"></span></span></span><span style=\"display: inline-block; overflow: hidden; vertical-align: -0.247em; border-left: 0px solid; width: 0px; height: 1.003em;\"></span></span></nobr><span role=\"presentation\"><math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mrow><mi mathvariant=\"double-struck\">Z</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span></span><script type=\"math/mml\"><math display=\"inline\"><msub><mrow><mi mathvariant=\"double-struck\">Z</mi></mrow><mrow><mn>2</mn></mrow></msub></math></script> topology, high mirror Chern numbers, topological nodal lines, and higher-order topological states, which we have verified rigorously by computing the topological indices and the presence of robust edge states and localized corner states. Remarkably, these topological properties emerge because of the CDW rather than a pre-existing topology in the pristine phase. These results elucidate the interplay between correlations, topology, and geometry in 2D materials and ind","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"9 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143915932","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":"Multiphoton-Excited Upconversion Luminescence and Amplified Spontaneous Emission from Te4+-Doped Cs2SnCl6 Nanocrystals","authors":"Wei Zhang, Wei Zheng, Lingyun Li, Xiaoying Shang, Ping Huang, Xiaodong Yi, Hao Zhang, Yan Yu, Xueyuan Chen","doi":"10.1021/acsnano.5c05992","DOIUrl":"https://doi.org/10.1021/acsnano.5c05992","url":null,"abstract":"High-order nonlinear multiphoton absorption (MPA) is technologically important for a variety of photonic and biological applications owing to its superior advantages over linear absorption and low-order MPA such as greater spatial confinement, larger penetration depth, reduced autofluorescence, and enhanced imaging resolution. However, practical implementation beyond three-photon processes remains notoriously difficult due to the sharp reduction of absorption cross sections with increasing nonlinearity and inherent material instability under high-density irradiation. Herein, we address these challenges through rationally designed Te<sup>4+</sup>-doped Cs<sub>2</sub>SnCl<sub>6</sub> nanocrystals (NCs), which demonstrate wideband nonlinear responsiveness across 800–2600 nm, allowing achievement of two- to seven-photon absorption (PA) with cross sections outperforming conventional nonlinear optical materials. Particularly, the engineered NCs enable 3PA-excited amplified spontaneous emission (ASE) with an ultralow excitation threshold of 0.22 μJ cm<sup>–2</sup> under a 1300 nm femtosecond-pulsed laser excitation, representing 1–4 orders of magnitude improvement compared to existing nonlinear ASE systems. This work presents the excellent 7PA properties in metal halide NCs, positioning lead-free metal halide NCs promising as efficient light-emitting materials for extreme nonlinear nanophotonics.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"11 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910781","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}
ACS NanoPub Date : 2025-05-06DOI: 10.1021/acsnano.5c02660
Yue Jiang, Jun Liang, Fenglin Zhuo, Hongyang Ma, Sajjad S. Mofarah, Charles C. Sorrell, Danyang Wang, Pramod Koshy
{"title":"Unveiling Mechanically Driven Catalytic Processes: Beyond Piezocatalysis to Synergetic Effects","authors":"Yue Jiang, Jun Liang, Fenglin Zhuo, Hongyang Ma, Sajjad S. Mofarah, Charles C. Sorrell, Danyang Wang, Pramod Koshy","doi":"10.1021/acsnano.5c02660","DOIUrl":"https://doi.org/10.1021/acsnano.5c02660","url":null,"abstract":"Mechanically driven catalysis (MDC) has emerged as an effective strategy for environmental remediation, renewable energy conversion, and cancer therapy; this functions by converting mechanical forces to drive catalytic reactions. This review examines four primary mechanisms, namely, piezocatalysis, flexocatalysis, tribocatalysis, and sonocatalysis, each involving specific catalytic pathways for harnessing mechanical energy at the nanoscale. However, significant challenges arise in decoupling the effects related to each individual mechanism in order to better understand and manipulate their synergies. In this review, the fundamental principles underpinning MDC are systematically interpreted. Beyond mechanistic insights, recent advancements in performance enhancement strategies for these catalysts are highlighted. Potential applications using these mechanistic approaches in environmental remediation (pollutant and antibiotic degradation and microbial disinfection), renewable energy conversion (hydrogen production and greenhouse gas conversion), and biomedical treatments (particularly cancer therapy) are discussed. Finally, the mechanistic synergies and limiting factors are explored, addressing challenges related to the overlooked combined effects of ultrasound as the activation source, complexities in mechanical force interactions at the nanoscale, and the need for targeted application strategies. Additionally, the industrial potential of these catalytic processes with consideration to scalability and practical deployment is evaluated. While challenges remain, this review provides a roadmap for advancing mechanically driven catalyst design and implementation toward real-world applications, offering potential into its future trajectory and transformative impact across numerous fields.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"47 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143915771","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}
ACS NanoPub Date : 2025-05-06DOI: 10.1021/acsnano.5c06297
Yang Yang, Yingjie Cao, Shengjie Li, Yana Wang, Xiaohua Zhang, Yitan Li, Zhaohui Yang
{"title":"Ultrastiff Bioinspired Protein–Carbon Nanotube Hybrid Sponge with Shape Memory Effects","authors":"Yang Yang, Yingjie Cao, Shengjie Li, Yana Wang, Xiaohua Zhang, Yitan Li, Zhaohui Yang","doi":"10.1021/acsnano.5c06297","DOIUrl":"https://doi.org/10.1021/acsnano.5c06297","url":null,"abstract":"Natural protein-based biomaterials with complex hierarchical structures often have incredible and even counterintuitive mechanical properties. Understanding and utilizing the conformational transition mechanisms of natural proteins will further guide the design of natural-inspired biomaterials. In this study, a small static-force-induced spatiotemporal “freezing” phenomenon of silk fibroins confined in porous carbon nanotube sponges has been investigated. The “freezing” silk fibroins not only bring the shape memory effect to elastic carbon nanotube sponges but also enable them to prop up heavy objects with loads exceeding 10,000 times their own weight. Also, the protein/CNTS hybrid achieves an ultrastiffness (over 10 MPa) and superelastic shape recovery (recovery strain >90%). Both experimental and numerical results indicate that the secondary conformational transition of silk fibroin plays a key role, where more α-helices/random coils transform into β-sheets under both confinement and low pressure. Our work reports a conformational transition mechanism of silk fibroin in a confined space, which provides guidance for constructing protein-based biological smart materials with potential applications in textiles, medicine, architecture, and other research fields.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"37 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143915770","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}
ACS NanoPub Date : 2025-05-06DOI: 10.1021/acsnano.4c15648
Yu-Wei Lu, Wei Li, Xue-Hua Wang
{"title":"Quantum and Classical Exceptional Points at the Nanoscale: Properties and Applications","authors":"Yu-Wei Lu, Wei Li, Xue-Hua Wang","doi":"10.1021/acsnano.4c15648","DOIUrl":"https://doi.org/10.1021/acsnano.4c15648","url":null,"abstract":"Exceptional points (EPs) are the spectral singularities and one of the central concepts of non-Hermitian physics, originating from the inevitable energy exchange with the surrounding environment. EPs exist in diverse physical systems and give rise to many counterintuitive effects, offering rich opportunities to control the dynamics and alter the properties of optical, electronic, acoustic, and mechanical states. The last two decades have witnessed the flourishing of non-Hermitian physics and associated applications related to coalesced eigenstates at EPs in a plethora of classical systems. While stemming from the quantum mechanism, the implementation of EPs in real quantum systems still faces challenges of tuning and stabilizing the systems at EPs, as well as the additional noises that hinder the observation of relevant phenomena. This review mainly focuses on summarizing the current efforts and opportunities offered by quantum EPs that result from or produce observable quantum effects. We introduce the concepts of Hamiltonian and Liouvillian EPs in the quantum regime and focus on their different properties in connection with quantum jumps and decoherence. We then provide a comprehensive discussion covering the theoretical and experimental advances in accessing EPs in diverse quantum systems and platforms. Special attention is paid to EP-based quantum-optics applications with state-of-art technologies. Finally, we present a discussion on the existing challenges of constructing quantum EPs at the nanoscale and an outlook on the fundamental science and applied technologies of quantum EPs, aiming to provide valuable insights for future research and building quantum devices with high performance and advanced functionalities.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"3 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910777","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}
ACS NanoPub Date : 2025-05-06DOI: 10.1021/acsnano.5c03919
My-Chi Thi Nguyen, Huu-Quang Nguyen, Hyojin Kang, Se Jeong Park, Jaebeom Lee
{"title":"Biomimetic Bouligand Meta-Assembly Enhances Modulability of Chiroptical Cotton Effects","authors":"My-Chi Thi Nguyen, Huu-Quang Nguyen, Hyojin Kang, Se Jeong Park, Jaebeom Lee","doi":"10.1021/acsnano.5c03919","DOIUrl":"https://doi.org/10.1021/acsnano.5c03919","url":null,"abstract":"Hierarchical bioinspired nanostructures have garnered significant attention due to their ability to mimic natural phenomena in well-defined artificial systems. Specifically, bioinspired chiral metasurfaces demonstrate strong chiroptical interactions with circularly polarized light, setting the stage for their role in next-generation optical technologies. In this study, a nature-inspired approach mimicking the structure of the <i>Protaetia</i> scarab beetle exoskeleton was applied to fabricate Bouligand meta-assemblies of magnetoplasmonic gold/iron oxide nanowires. By sputter coating a thin metallic platinum layer with controlled thickness, the fabricated structure exhibits amplified and tunable circular dichroism (CD) in transmission, diffuse reflectance circular dichroism (DRCD), and magnetic circular dichroism (MCD) modes within the ultraviolet and visible wavelength range. A strong enhancement of bisignate Cotton effects in the transmission CD spectrum was observed by adding a 30-nm-thick platinum layer, while a thinner metallic coating layer of 10 nm provided the strongest enhancement effect in DRCD mode. Additionally, the MCD study and computational optical simulations revealed the unique interplay of plasmonic coupling, enhanced absorption/reflection, and conformal inheritance of chirality as the origin of the enhancement effect of the metallic coating layer. The facile biomimetic fabrication technique provides multimodal control of the chiroptical Cotton effects, holding promises for applications in structural coloration, camouflage photonics, anti-counterfeiting, chiral sensing, and asymmetric catalysis.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"103 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143915768","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}