Nanoscale Horizons最新文献

{"title":"Elucidating the role of oxidation in two-dimensional silicon nanosheets†","authors":"Jeremy B. Essner, Abhijit Bera, Maharram Jabrayilov, Abhishek Chaudhari, Benjamin T. Diroll, Julia V. Zaikina and Matthew G. Panthani","doi":"10.1039/D4NH00387J","DOIUrl":"10.1039/D4NH00387J","url":null,"abstract":"<p >We report a synthetic protocol that yields hydrogen-terminated 2D silicon nanosheets with greatly reduced siloxane (<em>e.g.</em>, Si–O–Si, O<small>_<em>x</em></small>Si) content. These nanosheets displayed weak, broad photoluminescence centered near 610 nm with a low absolute photoluminescence quantum yield (as low as 0.2%). By intentionally oxidizing the nanosheets, the photoluminescence peak emission wavelength blueshifted to 510 nm, and the quantum yield increased by more than an order of magnitude to 8.5%. These results demonstrate that oxidation of 2D silicon nanosheets modulates the material's bandgap and suggests that previously reported photoluminescence properties for this material resulted, in part, from oxidation.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 3","pages":" 605-615"},"PeriodicalIF":8.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/nh/d4nh00387j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142996495","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":"Giant anisotropic piezoresponse of layered ZrSe3†","authors":"Borna Radatović, Hao Li, Roberto D'Agosta and Andres Castellanos-Gomez","doi":"10.1039/D4NH00539B","DOIUrl":"10.1039/D4NH00539B","url":null,"abstract":"<p >We investigated the effect of uniaxial strain on the electrical properties of few-layer ZrSe<small>₃</small> devices under compressive and tensile strains applied up to ±0.62% along different crystal directions. We observed that the piezoresponse, the change in resistance upon application of strain, of ZrSe<small>₃</small> strongly depends on both the direction in which electrical transport occurs and the direction in which uniaxial strain is applied. Notably, a remarkably high anisotropy in the gauge factor for a device with the transport occurring along the <em>b</em>-axis of ZrSe<small>₃</small> with GF = 68 when the strain is applied along the <em>b</em>-axis was obtained, and GF = 4 was achieved when strain is applied along the <em>a</em>-axis. This leads to an anisotropy ratio of almost 90%. Devices whose transport occurs along the <em>a</em>-axis, however, show much lower anisotropy in gauge factors when strain is applied along different directions, leading to an anisotropy ratio of 50%. Furthermore, <em>ab initio</em> calculations of strain dependent change in resistance showed the same trends of the anisotropy ratio as obtained from experimental results for both electrical transport and strain application directions, which were correlated with bandgap changes and different orbital contributions.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 2","pages":" 401-408"},"PeriodicalIF":8.0,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11667461/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880759","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":"Measurement of large ribosomal subunit size in cytoplasm and nucleus of living human cells†","authors":"Aneta Magiera, Karolina Kucharska, Tomasz Kalwarczyk, Patrycja Haniewicz, Karina Kwapiszewska and Robert Hołyst","doi":"10.1039/D4NH00214H","DOIUrl":"10.1039/D4NH00214H","url":null,"abstract":"<p >Ribosomes are the most essential macromolecules in cells, as they serve as production lines for every single protein. Here, we address the demand to study ribosomes in living human cells by applying time-resolved microscopy. We show that oxazole yellow iodide (YO-PRO-1 dye) intercalates tRNA and rRNA with a determined equilibrium constant of 3.01 ± 1.43 × 10<small>⁵</small> M<small>⁻¹</small>. Fluorescence correlation spectroscopy (FCS) is used to measure both the rotational (∼14 ms<small>⁻¹</small>) and translational (∼4 μm<small>²</small> s<small>⁻¹</small>) diffusion coefficients of the 60S ribosomes directly within living human cells. Furthermore, we apply the empirical length-scale dependent viscosity model to calculate the hydrodynamic radius of 60S ribosomes, equal to ∼15 nm, for the first time determined inside living cells. The FCS in YO-PRO-1 stained cells is used to assess ribosome abundance changes, exemplified in rapamycin-treated HeLa cells, highlighting its potential for dynamic ribosome characterization within the cellular environment.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 2","pages":" 388-400"},"PeriodicalIF":8.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/nh/d4nh00214h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142833130","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":"Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic mirror†","authors":"Vasanthan Devaraj, Isaac Azahel Ruiz Alvarado, Jong-Min Lee, Jin-Woo Oh, Uwe Gerstmann, Wolf Gero Schmidt and Thomas Zentgraf","doi":"10.1039/D4NH00546E","DOIUrl":"10.1039/D4NH00546E","url":null,"abstract":"<p >Realizing plasmonic nanogaps with a refractive index (<em>n</em> = 1) environment in metallic nanoparticle (NP) structures is highly attractive for a wide range of applications. So far in self-assembly-based approaches, without surface functionalization of metallic NPs, achieving such extremely small nanogaps is challenging. Surface functionalization introduces changes in the refractive index at nanogaps, which in turn deteriorates the desired plasmonic properties. In addition, fabrication of low-density dimer NP designs with smaller nanogaps poses a big challenge. Here, we introduce a simple and straightforward self-assembly-based strategy for the fabrication of low-density, isolated dimer gold nanoparticles in a nano-particle-on-metallic-mirror (NPoM) platform. A minimum interparticle gap distance between NPs of ∼3 nm is achieved without surface functionalization. This is possible by utilizing the M13 bacteriophage as the spacer layer instead of SiO<small>₂</small> in NPoM. Density functional theory calculations on Au atom adsorption on SiO<small>₂</small> and M13 bacteriophage surface constituents trace the NP assembly on the latter to a comparatively weak interaction with the substrate. Our study offers an attractive route for fabricating low density plasmonic dimer structures featuring small nanogaps and will enrich structure specific/isolated studies benefitting a variety of optical, actuator, and sensing applications.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 3","pages":" 537-548"},"PeriodicalIF":8.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/nh/d4nh00546e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845356","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":"Reflecting on Nanoscale Horizons in 2024","authors":"","doi":"10.1039/D4NH90083A","DOIUrl":"10.1039/D4NH90083A","url":null,"abstract":"<p >The <em>Nanoscale Horizons</em> Editorial Board and Editorial Office reflect on the exciting events, activities and updates from the journal in 2024 and look forward to celebrating 10 years since the journal was inaugurated in 2025.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 1","pages":" 11-15"},"PeriodicalIF":8.0,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142783410","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":"Achieving neuronal dynamics with spike encoding and spatial-temporal summation in vanadium-based threshold switching memristor for asynchronous signal integration†","authors":"Pei-Lin Lin, Zih-Siao Liao, Shuai-Ming Chen and Jen-Sue Chen","doi":"10.1039/D4NH00484A","DOIUrl":"10.1039/D4NH00484A","url":null,"abstract":"<p >Artificial neuronal devices that emulate the dynamics of biological neurons are pivotal for advancing brain emulation and developing bio-inspired electronic systems. This paper presents the design and demonstration of an artificial neuron circuit based on a Pt/V/AlO<small>_<em>x</em></small>/Pt threshold switching memristor (TSM) integrated with an external resistor. By applying voltage pulses, we successfully exhibit the leaky integrate-and-fire (LIF) behavior, as well as both spatial and spatiotemporal summation capabilities, achieving the asynchronous signal integration. Notably, the Pt/V/AlO<small>_<em>x</em></small>/Pt TSM demonstrates ultrafast switching speeds (on/off times ∼165 ns/310 ns) and remarkable stability (endurance &gt;10<small>²</small> cycles with cycle-to-cycle variations &lt;2.5%). These attributes render the circuit highly suitable as a spike generator in neuromorphic computing applications. The Pt/V/AlO<small>_<em>x</em></small>/Pt TSM-based spike encoder can output current spikes at frequencies ranging from approximately 200 kHz to 800 kHz. The modulation of output spike frequency is achievable by adjusting the external resistor and capacitor within the spike encoder circuit, providing considerable operational flexibility. Additionally, the Pt/V/AlO<small>_<em>x</em></small>/Pt TSM boasts a lower threshold voltage (<em>V</em><small>_th</small> ∼ 0.84 V) compared to previously reported VO<small>_<em>x</em></small>-based TSMs, leading to significantly reduced energy consumption for spike generation (∼2.75 nJ per spike).</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 2","pages":" 379-387"},"PeriodicalIF":8.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142805642","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":"Nanoscale Horizons Emerging Investigator Series: Dr Mita Dasog, Dalhousie University, Canada","authors":"","doi":"10.1039/D4NH90079K","DOIUrl":"10.1039/D4NH90079K","url":null,"abstract":"<p >Our Emerging Investigator Series features exceptional work by early-career nanoscience and nanotechnology researchers. Read Mita Dasog's Emerging Investigator Series article ‘Unlocking the secrets of porous silicon formation: insights into magnesiothermic reduction mechanism using <em>in situ</em> powder X-ray diffraction studies’ (https://doi.org/10.1039/D4NH00244J) and read more about her in the interview below.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 2","pages":" 203-204"},"PeriodicalIF":8.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778863","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":"Expression of concern: Carbon quantum dots as a dual platform for the inhibition and light-based destruction of collagen fibers: implications for the treatment of eye floaters","authors":"Alexandre Barras, Félix Sauvage, Inès de Hoon, Kevin Braeckmans, Dawei Hua, Gaëtan Buvat, Juan C. Fraire, Christophe Lethien, J. Sebag, Michael Harrington, Amar Abderrahmani, Rabah Boukherroub, Stefaan De Smedt and Sabine Szunerits","doi":"10.1039/D4NH90078B","DOIUrl":"10.1039/D4NH90078B","url":null,"abstract":"<p >Expression of concern for ‘Carbon quantum dots as a dual platform for the inhibition and light-based destruction of collagen fibers: implications for the treatment of eye floaters’ by Alexandre Barras <em>et al.</em>, <em>Nanoscale Horiz.</em>, 2021, <strong>6</strong>, 449–461, https://doi.org/10.1039/D1NH00157D.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 2","pages":" 409-409"},"PeriodicalIF":8.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/nh/d4nh90078b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778922","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":"Tailoring catalysis at the atomic level: trends and breakthroughs in single atom catalysts for organic transformation reactions","authors":"Devendra Sharma, Devanshu Sajwan, Shubhankar Mishra, Ashrumochan Gouda, Prerna Mittal, Priyanka Choudhary, Bhagyashree Priyadarshini Mishra, Sahil Kumar and Venkata Krishnan","doi":"10.1039/D4NH00479E","DOIUrl":"10.1039/D4NH00479E","url":null,"abstract":"<p >The utilization of precise materials in heterogeneous catalysis will provide various new possibilities for developing superior catalysts to tackle worldwide energy and environmental issues. In recent years, single atom catalysts (SACs) with excellent atom utilization and isolated active sites have progressed dramatically as a thriving sector of catalysis research. Additionally, SACs bridge the gap between homogeneous and heterogeneous catalysts and overcome the limitations of both categories. Current research on SACs is highly oriented towards the organic synthesis of high-significance molecules with promising potential for large-scale applicability and industrialization. In this context, this review aims to comprehensively analyze the state-of-the-art research in the synthesis of SACs and analyze their structural, electronic, and geometric properties. Moreover, the unprecedented catalytic performance of the SACs towards various organic transformation reactions is succinctly summarized with recent reports. Further, a detailed summary of the current state of the research field of SACs in organic transformation is discussed. Finally, a critical analysis of the existing challenges in this emerging field of SACs and the possible countermeasures are provided. We believe that SACs have the potential to profoundly alter the chemical industry, pushing the boundaries of catalysis in new and undiscovered territory.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 3","pages":" 423-459"},"PeriodicalIF":8.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778944","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":"Spintronic devices and applications using noncollinear chiral antiferromagnets†","authors":"Ankit Shukla, Siyuan Qian and Shaloo Rakheja","doi":"10.1039/D4NH00045E","DOIUrl":"10.1039/D4NH00045E","url":null,"abstract":"<p >Antiferromagnetic materials have several unique properties, such as a vanishingly small net magnetization, which generates weak dipolar fields and makes them robust against perturbation from external magnetic fields and rapid magnetization dynamics, as dictated by the geometric mean of their exchange and anisotropy energies. However, experimental and theoretical techniques to detect and manipulate the antiferromagnetic order in a fully electrical manner must be developed to enable advanced spintronic devices with antiferromagnets as their active spin-dependent elements. Among the various antiferromagnetic materials, conducting antiferromagnets offer high electrical and thermal conductivities and strong electron–spin–phonon interactions. Noncollinear metallic antiferromagnets with negative chirality, including Mn<small>₃</small>Sn, Mn<small>₃</small>Ge, and Mn<small>₃</small>GaN, offer rich physics of spin momentum locking, topologically protected surface states, large spin Hall conductivity, and a magnetic spin Hall effect that arises from their topology. In this review article, we introduce the crystal structure and the physical phenomena, including the anomalous Hall and Nernst effects, spin Hall effect, and magneto-optic Kerr effect, observed in negative chirality antiferromagnets. Experimental advances related to spin–orbit torque-induced dynamics and the impact of the torque on the microscopic spin structure of Mn<small>₃</small>Sn are also discussed. Recent experimental demonstrations of a finite room-temperature tunneling magnetoresistance in tunnel junctions with chiral antiferromagnets opens the prospect of developing spintronic devices with fully electrical readout. Applications of chiral antiferromagnets, including non-volatile memory, high-frequency signal generators/detectors, neuro-synaptic emulators, probabilistic bits, thermoelectric devices, and Josephson junctions, are highlighted. We also present analytic models that relate the performance characteristics of the device with its design parameters, thus enabling a rapid technology–device assessment. Effects of Joule heating and thermal noise on the device characteristics are briefly discussed. We close the paper by summarizing the status of research and present our outlook in this rapidly evolving research field.</p>","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 3","pages":" 484-511"},"PeriodicalIF":8.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862603","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}