Nanoscale Horizons最新文献

{"title":"Biomimetic laser-induced graphene fern leaf and enzymatic biosensor for pesticide spray collection and monitoring†","authors":"Nathan M. Jared, Zachary T. Johnson, Cicero C. Pola, Kristi K. Bez, Krishangee Bez, Shelby L. Hooe, Joyce C. Breger, Emily A. Smith, Igor L. Medintz, Nathan M. Neihart and Jonathan C. Claussen","doi":"10.1039/D4NH00010B","DOIUrl":"10.1039/D4NH00010B","url":null,"abstract":"<p >Monitoring of pesticide concentration distribution across farm fields is crucial to ensure precise and efficient application while preventing overuse or untreated areas. Inspired by nature's wettability patterns, we developed a biomimetic fern leaf pesticide collection patch using laser-induced graphene (LIG) alongside an external electrochemical LIG biosensor. This “collect-and-sense” system allows for rapid pesticide spray monitoring in the farm field. The LIG is synthesized and patterned on polyimide through a high-throughput gantry-based CO<small>₂</small> laser process, making it amenable to scalable manufacturing. The resulting LIG-based leaf exhibits a remarkable water collection capacity, harvesting spray mist/fog at a rate approximately 11 times greater than a natural ostrich fern leaf when the collection is normalized to surface area. The developed three-electrode LIG pesticide biosensor, featuring a working electrode functionalized with electrodeposited platinum nanoparticles (PtNPs) and the enzyme glycine oxidase, displayed a linear range of 10–260 μM, a detection limit of 1.15 μM, and a sensitivity of 5.64 nA μM<small>⁻¹</small> for the widely used herbicide glyphosate. Also, a portable potentiostat with a user-friendly interface was developed for remote operation, achieving an accuracy of up to 97%, when compared to a standard commercial benchtop potentiostat. The LIG “collect-and-sense” system can consistently collect and monitor glyphosate spray after 24–48 hours of spraying, a time that corresponds to the restricted-entry interval required to enter most farm fields after pesticide spraying. Hence, this innovative “collect-and-sense” system not only advances precision agriculture by enabling monitoring and mapping of pesticide distribution but also holds the potential to significantly reduce environmental impact, enhance crop management practices, and contribute to the sustainable and efficient use of agrochemicals in modern agriculture.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":null,"pages":null},"PeriodicalIF":8.0,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/nh/d4nh00010b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141506713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bubbling resilient 3D free-standing nanoporous graphene with an encapsulated multicomponent nano-alloy for enhanced electrocatalysis†","authors":"Linshan Zhu, Qingqing Li, Yixuan Hu, Xin Wu, Kolan Madhav Reddy, Kaikai Li, Guoqiang Xie, Xingjun Liu and Hua-Jun Qiu","doi":"10.1039/D4NH00190G","DOIUrl":"10.1039/D4NH00190G","url":null,"abstract":"<p >The design and synthesis of highly durable and active electrocatalysts are crucial for improving the hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). In this work, we present a novel dealloyed nanoporous PtCuNiCoMn multicomponent alloy with ligaments/pores ranging from 2–3 nm, which is <em>in situ</em> encapsulated in a three-dimensional, free-standing nanoporous nanotubular graphene network featuring a pore/tube diameter of ∼200 to 300 nm. This method allows precise control over the noble metal loading and alloy composition while preventing noble metal loss throughout the preparation process. The innovative bimodal nanoporous graphene/alloy structure, coupled with an open 3D spongy morphology, and optimized surface Pt electronic structure through multicomponent interaction, significantly enhances the activity for the HER/ORR, outperforming commercial Pt/C. Moreover, this design addresses the issues of Pt nanoparticle aggregation and detachment from carbon supports that typically exist in Pt/C-type catalysts, thereby substantially improving the catalytic durability, even under intense gas bubbling conditions.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":null,"pages":null},"PeriodicalIF":8.0,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141449132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High efficiency graphene–silicon hybrid-integrated thermal and electro-optical modulators†","authors":"Xiaoxuan Wu, Zhengyi Cao, Tianxiang Zhao, Yun Wu, Zhonghui Li, Spyros Doukas, Elefterios Lidorikis, Yu Xue, Liu Liu, Omid Ghaebi, Giancarlo Soavi, Junpeng Lu, Zhenhua Ni and Junjia Wang","doi":"10.1039/D4NH00160E","DOIUrl":"10.1039/D4NH00160E","url":null,"abstract":"<p >Graphene modulators are considered a potential solution for achieving high-efficiency light modulation, and graphene–silicon hybrid-integrated modulators are particularly favorable due to their CMOS compatibility and low cost. The exploitation of graphene modulator latent capabilities remains an ongoing endeavour to improve the modulation and energy efficiency. Here, high-efficiency graphene–silicon hybrid-integrated thermal and electro-optical modulators are realized using gold-assisted transfer. We fabricate and demonstrate a microscale thermo-optical modulator with a tuning efficiency of 0.037 nm mW<small>⁻¹</small> and a high heating performance of 67.4 K μm<small>³</small> mW<small>⁻¹</small> on a small active area of 7.54 μm<small>²</small> and a graphene electro-absorption modulator featuring a high speed data rate reaching 56 Gb s<small>⁻¹</small> and a low power consumption of 200 fJ per bit. These devices show superior performance compared to the state of the art devices in terms of high efficiency, low process complexity, and compact device footage, which can support the realization of high-performance graphene–silicon hybrid-integrated photonic circuits with CMOS compatibility.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":null,"pages":null},"PeriodicalIF":8.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141416723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bionic dual-scale structured films for efficient passive radiative cooling accompanied by robust durability†","authors":"Renwei Zhang, Ningning Sun, Zehong Zhao, Shixu Wang, Mengfan Zhang, Lei Zhao, Yahua Liu and Shile Feng","doi":"10.1039/D4NH00136B","DOIUrl":"10.1039/D4NH00136B","url":null,"abstract":"<p >Passive radiative cooling (PRC), as an energy-free cooling approach, is ingeniously harnessed for certain natural organisms to withstand extreme high-temperature climates, which has inspired numerous bionic designs. However, it is a great challenge to enhance the durability of the designed materials in practical scenarios while inheriting the natural biological principles. We demonstrate bionic dual-scale structured (BDSS) films for efficient passive radiative cooling accompanied by robust durability after discovering the excellent thermoregulatory properties of the inner surface of Hawaiian scallop shell. We found that the inner surface of the shell consists of large-scale triangular ridges scattered with small-scale terrace steps. This dual-scale structure can enhance the reflectivity of sunlight by efficient Mie scattering and increase the emissivity in the mid-infrared range by lengthening the propagation of photons, thereby decreasing the surface temperature. Underpinned by this finding, we developed a BDSS film that features a strong solar spectrum reflectivity of 0.95 and a high mid-infrared emissivity of 0.98, achieving a sub-ambient cooling of 10.8 °C under direct sunlight. Additionally, the designed films possess robust durability including excellent self-cleaning, flexibility, mechanical strength, chemical stability, and anti-ultraviolet radiation, which is promising for thermal thermoregulation in various harsh scenarios.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":null,"pages":null},"PeriodicalIF":8.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141416722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanomaterials as a Service (NaaS) concept: on-demand protocols for volume synthesis of nanomaterials†","authors":"Stylianos Kioumourtzoglou, Sebastian Hof, Cécile Kalk, Viktor Toth, Mikaela Görlin, Jaroslava Nováková and Jacinto Sá","doi":"10.1039/D4NH00174E","DOIUrl":"10.1039/D4NH00174E","url":null,"abstract":"<p >Establishing scalable nanomaterials synthesis protocols remains a bottleneck towards their commercialisation and, thus, a topic of intense research and development. Herein, we present an automated machine-learning microfluidic platform capable of synthesising optically active nanomaterials from target spectra originating from prior experience, theorised or published. Implementing unsupervised Bayesian optimisation with Gaussian processes reduces the optimisation time and the need for prior knowledge to initiate the process. Using PTFE tubing and connectors enables facile change in reactor design. Ultimately, the platform substitutes the labour-intensive trial-and-error synthesis and provides a pathway to standardisation and volume synthesis, slowing down the translation and commercialisation of high-quality nanomaterials. As a proof-of-concept, Ag nanoplates and Prussian-blue nanoparticle protocols were optimised and validated for volume production.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":null,"pages":null},"PeriodicalIF":8.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/nh/d4nh00174e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141416724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanoscale Horizons Emerging Investigator Series: Dr Leslie Schoop, Princeton University, USA","authors":"","doi":"10.1039/D4NH90048K","DOIUrl":"10.1039/D4NH90048K","url":null,"abstract":"<p >Our Emerging Investigator Series features exceptional work by early-career nanoscience and nanotechnology researchers. Read Leslie Schoop's Emerging Investigator Series article ‘Chemical exfoliation of 1-dimensional antiferromagnetic nanoribbons from a non-van der Waals material’ (https://doi.org/10.1039/D3NH00408B) and read more about her in the interview below.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":null,"pages":null},"PeriodicalIF":8.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141295159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Catalyst durability in electrocatalytic H2O2 production: key factors and challenges†","authors":"Ji Sik Choi, Guilherme V. Fortunato, Daniele C. Jung, Julio C. Lourenço, Marcos R. V. Lanza and Marc Ledendecker","doi":"10.1039/D4NH00109E","DOIUrl":"10.1039/D4NH00109E","url":null,"abstract":"<p >On-demand electrocatalytic hydrogen peroxide (H<small>₂</small>O<small>₂</small>) production is a significant technological advancement that offers a promising alternative to the traditional anthraquinone process. This approach leverages electrocatalysts for the selective reduction of oxygen through a two-electron transfer mechanism (ORR-2e<small>⁻</small>), holding great promise for delivering a sustainable and economically efficient means of H<small>₂</small>O<small>₂</small> production. However, the harsh operating conditions during the electrochemical H<small>₂</small>O<small>₂</small> production lead to the degradation of both structural integrity and catalytic efficacy in these materials. Here, we systematically examine the design strategies and materials typically utilized in the electroproduction of H<small>₂</small>O<small>₂</small> in acidic environments. We delve into the prevalent reactor conditions and scrutinize the factors contributing to catalyst deactivation. Additionally, we propose standardised benchmarking protocols aimed at evaluating catalyst stability under such rigorous conditions. To this end, we advocate for the adoption of three distinct accelerated stress tests to comprehensively assess catalyst performance and durability.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":null,"pages":null},"PeriodicalIF":8.0,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/nh/d4nh00109e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141194705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of innovative multifunctional dye using MXene nanosheets†","authors":"Hyeongtaek Park, Young Ho Park, Gul Karima, Sujin Kim, G. Murali, Nathaniel S. Hwang, Insik In and Hwan D. Kim","doi":"10.1039/D4NH00187G","DOIUrl":"10.1039/D4NH00187G","url":null,"abstract":"<p >The increasing demand for natural and safer alternatives to traditional hair dyes has led to the investigation of nanomaterials as potential candidates for hair coloring applications. MXene nanosheets have emerged as a promising alternative in this context due to their unique optical and electronic properties. In this study, we aimed to evaluate the potential of Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small> (T<small>_<em>x</em></small> = –O, –OH, –F, <em>etc.</em>) MXene nanosheets as a hair dye. MXene nanosheet-based dyes have been demonstrated to exhibit not only coloring capabilities but also additional properties such as antistatic properties, heat dissipation, and electromagnetic wave shielding. Additionally, surface modification of MXene using collagen reduces the surface roughness of hair and upregulates keratinocyte markers KRT5 and KRT14, demonstrating the potential for tuning its physicochemical and biological properties. This conceptual advancement highlights the potential of MXene nanosheets to go beyond simple cosmetic improvements and provide improved comfort and safety by preventing the presence of hazardous ingredients and solvents while providing versatility.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":null,"pages":null},"PeriodicalIF":8.0,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141160424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intermetallics with sp–d orbital hybridisation: morphologies, stabilities and work functions of In–Pd particles at the nanoscale†","authors":"Alexis Front, Clovis Lapointe and Émilie Gaudry","doi":"10.1039/D3NH00594A","DOIUrl":"10.1039/D3NH00594A","url":null,"abstract":"<p >The field of intermetallic catalysts, alloying a p-block and a transition metal to form a pM–TM bimetallic alloy, is experiencing robust growth, emerging as a vibrant frontier in catalysis research. Although such materials are increasingly used in the form of nanoparticles, a precise description of their atomic arrangements at the nanoscale remains scarce. Based on the In–Pd binary as a typical pM–TM system, we performed density functional theory calculations to investigate the morphologies, relative stabilities and electronic properties of 24 Å and 36 Å nanoparticles built from the In<small>₃</small>Pd<small>₂</small>, InPd and InPd<small>₃</small> compounds. Wulff equilibrium structures are compared to other ordered and disordered structures. Surface energies are computed to discuss their thermodynamic stability, while work functions are calculated to examine their electronic structures. For any compound, increasing the size leads to the stabilisation of Wulff polyhedra, which are found to offer smaller surface energies than non-crystalline and chemically disordered structures. Disordered In<small>₃</small>Pd<small>₂</small> and InPd nanoparticles show a tendency towards amorphisation, owing to repulsive short In–In bonds. Tuning nanoparticles’ work functions can be achieved through the control of the surface structure and composition, by virtue of the roughly linear correlation found between the surface composition and the work function which nevertheless includes a certain number of outliers. This work paves the way to rationalisation of both structural and electronic properties of pM–TM nanoparticles.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":null,"pages":null},"PeriodicalIF":8.0,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/nh/d3nh00594a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141168814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-catalytic nanoparticle shaping for preparing mesoscopic assemblies of semiconductor quantum dots and organic molecules†","authors":"Rumana Akter, Nicholas Kirkwood, Samantha Zaman, Bang Lu, Tinci Wang, Satoru Takakusagi, Paul Mulvaney, Vasudevanpillai Biju and Yuta Takano","doi":"10.1039/D4NH00134F","DOIUrl":"10.1039/D4NH00134F","url":null,"abstract":"<p >We report a unique bio-catalytic nanoparticle shaping (BNS) method for preparing a variety of mesoscopic particles by a facile process. For example, the BNS method affords mesoscopic QD assembly dispersions. Large-size sedimentations (&gt;1 μm) of QDs are first formed using oligo-<small>L</small>-lysine linkers. These then undergo controlled enzymatic cleavage of the linkers using trypsin, which surprisingly leads to mesoscopic particles about 84 nm in size with a narrow size distribution. A detailed mechanism of the BNS method is investigated using tetrakis(4-carboxyphenyl)porphyrin (TCPP), instead of QDs, as a probe molecule. Interestingly, the BNS method can also be applied to other combinations of enzymes and enzymatically degradable linkers, such as hyaluronidase with hyaluronan. As a potential application, the mesoscopic particles of QDs and oligo-lysine exhibit their ability to act as a drug delivery carrier originating from the features of both QDs and oligo-lysine. The BNS method demonstrates the universality and versatility of preparing mesoscopic particles and opens new doors for studying QD assemblies and molecular-based mesoscopic particles.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":null,"pages":null},"PeriodicalIF":8.0,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141079861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}