Nano Letters最新文献

Alterpiezoresponse in Two-Dimensional Lieb-Lattice Altermagnets. 二维利布晶格交替磁体的交替压电响应。

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-07-25 DOI: 10.1021/acs.nanolett.5c02295

Xilong Xu, Li Yang

{"title":"Alterpiezoresponse in Two-Dimensional Lieb-Lattice Altermagnets.","authors":"Xilong Xu, Li Yang","doi":"10.1021/acs.nanolett.5c02295","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c02295","url":null,"abstract":"Altermagnetism, featuring alternating spin structures in reciprocal space, has sparked growing interest. Here, we predict novel real-space alternative piezomagnetic and piezoelectric responses in an emerging altermagnetic family of Lieb lattices, specifically transition-metal chalcogenides M2WS4 (M = Mn, Fe, Co). The unique S4T crystal-spin symmetry leads to distinct magnetic and electric responses depending on the direction of applied stress. When subjected to axial stress, they exhibit a giant piezomagnetic response, which is about 1-2 orders of magnitude larger than that of most piezomagnetic materials, while the residual C2 symmetry suppresses the piezoelectric effect. In contrast, diagonal stress induces an imbalance of oppositely aligned electric-dipole moments and a significant piezoelectric response, while in-plane mirror symmetry inhibits the piezomagnetic effect. This alternative piezoresponse offers an unprecedented opportunity to precisely control electric and magnetic properties independently, opening new avenues for altermagnetic materials in high-fidelity multifunctional memory and sensor applications.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":""},"PeriodicalIF":9.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705794","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

Tracking Photothermal Heat Generation in ITO Nanocrystals and Its Dissipation to Their Surrounding Environment. ITO纳米晶体的光热生成及其对周围环境的耗散。

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-07-24 DOI: 10.1021/acs.nanolett.5c02441

Boxi Li, Xiaobing Chen, Tanner A Wilcoxson, Jiho Kang, Thomas M Truskett, Delia J Milliron, Carlos R Baiz, Sean T Roberts

{"title":"Tracking Photothermal Heat Generation in ITO Nanocrystals and Its Dissipation to Their Surrounding Environment.","authors":"Boxi Li, Xiaobing Chen, Tanner A Wilcoxson, Jiho Kang, Thomas M Truskett, Delia J Milliron, Carlos R Baiz, Sean T Roberts","doi":"10.1021/acs.nanolett.5c02441","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c02441","url":null,"abstract":"Plasmonic metal oxide nanocrystals can readily transduce infrared light into heat for applications in catalysis, therapeutics, and soft robotics. Here, we investigate photothermal pathways in oleate-capped tin-doped indium oxide (ITO) nanocrystals dispersed in toluene, mapping heat transfer dynamics from the ITO lattice to its surface and surrounding solvent. Using rhodamine B dyes adhered to nanocrystal surfaces and toluene as temperature probes, we track photothermal heat dissipation via transient absorption spectroscopy. We find heat transfer from ITO nanocrystals to surface-adsorbed molecules unfolds over tens of picoseconds, followed by heat dissipation into the surrounding solvent over hundreds of picoseconds. We have developed a theoretical model that quantitatively reproduces these kinetics and identifies nanocrystal surface-to-solvent heat transfer as the primary bottleneck in heat dissipation. These insights advance our understanding of nanoscale heat transport involving ITO nanocrystals and offer insights into how to design these materials for heat-driven applications.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":""},"PeriodicalIF":9.6,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144697116","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

Nanomechanical Switch toward Electron Turnstile Operation. 面向电子转门操作的纳米机械开关。

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-07-24 DOI: 10.1021/acs.nanolett.5c02496

Donggeun Lee, Seung-Woo Jeon, Sang-Wook Han, Junho Suh, Hee Chul Park, Chulki Kim

引用次数: 0

Aluminum Nanocrystals Form Voids under Their Native Oxide. 铝纳米晶体在其原生氧化物下形成空洞。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-07-24 DOI: 10.1021/acs.nanolett.5c02981

Christian R Jacobson,Aliyu Ahmad,Ang Tao,Xu Qi,Aaron Bayles,Adebola Ogundare,Yimo Han,Henry O Everitt,Naomi J Halas

引用次数: 0

On a Continuous Aqueous Thermogalvanic Redox Agent with Anomalous Thermopower. 具有异常热电性能的连续水热电氧化还原剂的研究。

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-07-24 DOI: 10.1021/acs.nanolett.5c02774

Ehsan Hosseini, Mohammad Zakertabrizi, Mina Hosseini, Matthew J Powell-Palm

{"title":"On a Continuous Aqueous Thermogalvanic Redox Agent with Anomalous Thermopower.","authors":"Ehsan Hosseini, Mohammad Zakertabrizi, Mina Hosseini, Matthew J Powell-Palm","doi":"10.1021/acs.nanolett.5c02774","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c02774","url":null,"abstract":"Achieving stable and sustained power output remains a major challenge in the development of ionic thermoelectric devices (such as thermogalvanic cells and thermoionic capacitors) for low-grade heat harvesting. Many such systems exhibit strong performance in the initial throes of operation but degrade rapidly over time, limiting their utility. Here, we report an aqueous thermogalvanic redox agent ([Ni(bpy)3]2+/3+) with a Seebeck coefficient approximately double that of the canonical [Fe(CN)6]4-/3-, which can be utilized continuously for multiple hours under large temperature gradients (ΔT ≥ 60 K) without significant change in electrical performance. Molecular dynamics simulations suggest that significant differences in hydration shell behavior between the oxidant and reductant, which in turn provide a significant (here configurational) entropy difference, drive the observed thermopower. This new redox pair demonstrates stability, cyclability, and tunability in both liquid- and gel-based electrolytes, and provides a novel redox platform from which to build next-generation high-thermopower waste-heat recovery cells.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":""},"PeriodicalIF":9.6,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705796","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

Exploiting Intersubband Plasmons in Vertically Aligned Carbon Nanotubes for Near-Infrared Electrochromic Windows. 利用垂直排列碳纳米管的子带间等离子体在近红外电致变色窗口中的应用。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-07-24 DOI: 10.1021/acs.nanolett.5c00059

Alex Abelson,Philip M Jean-Remy,Tom Nakotte,Paul E Munger,Steven F Buchsbaum,Sei Jin Park,Anna M Hiszpanski

引用次数: 0

Ferroelectric Charged Domain-Wall Synapse for Neuromorphic Computing. 用于神经形态计算的铁电畴壁突触。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-07-24 DOI: 10.1021/acs.nanolett.5c02081

Chen Liang,Ye Wang,Yiming Liu,Xiaoming Shi,Ji Ma,Wael Ben Taazayet,Qinghua Liang,Huayu Yang,Yuanyuan Fan,Jiafang Li,Congli He,Ying Fu,Houbing Huang,Jing Wang,Ce-Wen Nan

{"title":"Ferroelectric Charged Domain-Wall Synapse for Neuromorphic Computing.","authors":"Chen Liang,Ye Wang,Yiming Liu,Xiaoming Shi,Ji Ma,Wael Ben Taazayet,Qinghua Liang,Huayu Yang,Yuanyuan Fan,Jiafang Li,Congli He,Ying Fu,Houbing Huang,Jing Wang,Ce-Wen Nan","doi":"10.1021/acs.nanolett.5c02081","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c02081","url":null,"abstract":"Inspired by brain neural networks, integrated memory-computing devices are critical to meet the demands of big data and artificial intelligence. This work explores the quasi-continuous modulation of ferroelectric charged domain walls' conductance, which is confined in a topological quad-domain, allowing the charged domain walls to serve as neural synapses. The device mimics synaptic plasticity (long-term potentiation and depression) and shows paired impulse facilitation. In a designed ferroelectric domain-wall neural network, we demonstrate multiplicative, accumulation-additive operations between the input image and the stored response matrix, capable of image processing functions, including triclassification with 100% accuracy. In the neural network simulation, the MINST database and the Cifar-10 database achieve 98.7% and 95.1% recognition rates. The sub-nanosecond polarization switching and the ultrathin (3-5 nm) charged domain walls position them as a promising platform for advancing ultrafast and scalable synaptic devices for low-power (potentially reduced to 0.2 aJ with sub-nanosecond pulse durations) neuromorphic computing systems.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"115 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144701271","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

3D Multiphoton Nanolithography with Bioresorbable Amino Acid-Based Resins. 生物可吸收氨基酸基树脂的三维多光子纳米光刻技术。

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-07-24 DOI: 10.1021/acs.nanolett.5c02804

Christoph Naderer, Dmitry Sivun, Stephan Haudum, Ian Teasdale, Jaroslaw Jacak

引用次数: 0

Single-Molecule Conductance through Hybrid Radially and Linearly π-Conjugated Macromolecules Reveals an Unusual Intramolecular π-Interaction. 通过杂化径向和线性π共轭大分子的单分子电导揭示了一种不寻常的分子内π相互作用。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-07-24 DOI: 10.1021/acs.nanolett.5c03693

Wanzhuo Shi,Mengjiao Wang,Latha Venkataraman,John D Tovar

{"title":"Single-Molecule Conductance through Hybrid Radially and Linearly π-Conjugated Macromolecules Reveals an Unusual Intramolecular π-Interaction.","authors":"Wanzhuo Shi,Mengjiao Wang,Latha Venkataraman,John D Tovar","doi":"10.1021/acs.nanolett.5c03693","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c03693","url":null,"abstract":"We describe the design, synthesis, and single-molecule junction conductance of π-electron molecules bearing both radial and linear π-conjugation pathways, whereby cycloparaphenylene (CPP) radial cores are π-extended linearly with aryl alkyne substituents as models for previously reported CPP-arylene ethynylene conjugated polymers. Although radially and linearly conjugated molecules have been studied previously in isolation as junction-bridging molecular electronic units, this is the first study to examine molecules where both topologies are operative. Our results reveal that the presence of radial CPP components within the junction-spanning pathway leads to a reduction in the conductance of the backbone compared to model linear phenyl substituents. Through tight-binding and DFT-based calculations, we attribute this conductance change to intramolecular van der Waals (vdW) interactions between the CPP ring and the junction-spanning arylene-ethynylene molecular backbone. These interactions induce changes in the dihedral angles of the backbone, leading to a reduced overlap of π orbitals within the molecular junction.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"54 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144701177","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

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-07-23

Yinglin Wang, Runlong Rao, Zejing Wang, Chao Xu, Yangyang Shi, Shuai Wan* and Zhongyang Li*,

引用次数: 0