Nanoscale Horizons最新文献_第9页

Phase and frequency-resolved microscopy of operating spin Hall nano-oscillator arrays 运行中的自旋霍尔纳米振荡器阵列的相位和频率分辨显微技术

IF 8 2区材料科学

Nanoscale Horizons Pub Date : 2024-07-31 DOI: 10.1039/D4NH00260A

A. Alemán, A. A. Awad, S. Muralidhar, R. Khymyn, A. Kumar, A. Houshang, D. Hanstorp and J. Åkerman

{"title":"Phase and frequency-resolved microscopy of operating spin Hall nano-oscillator arrays","authors":"A. Alemán, A. A. Awad, S. Muralidhar, R. Khymyn, A. Kumar, A. Houshang, D. Hanstorp and J. Åkerman","doi":"10.1039/D4NH00260A","DOIUrl":"10.1039/D4NH00260A","url":null,"abstract":"Coherent optical detection is a powerful technique for characterizing a wide range of physical excitations. Here, we use two optical approaches (fundamental and parametric pumping) to microscopically characterize the high-frequency auto-oscillations of single and multiple nano-constriction spin Hall nano-oscillators (SHNOs). To validate the technique and demonstrate its robustness, we study SHNOs made from two different material stacks, NiFe/Pt and W/CoFeB/MgO, and investigate the influence of both the RF injection power and the laser power on the measurements, comparing the optical results to conventional electrical measurements. To demonstrate the key features of direct, non-invasive, submicron, spatial, and phase-resolved characterization of the SHNO magnetodynamics, we map out the auto-oscillation magnitude and phase of two phase-binarized SHNOs used in Ising machines. This proof-of-concept platform establishes a strong foundation for further extensions, contributing to the ongoing development of crucial characterization techniques for emerging computing technologies based on spintronics devices.","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 10","pages":" 1732-1739"},"PeriodicalIF":8.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/nh/d4nh00260a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141869769","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}

引用次数: 0

Freestanding monolayer CrOCl through chemical exfoliation† 通过化学剥离实现独立单层 CrOCl

IF 8 2区材料科学

Nanoscale Horizons Pub Date : 2024-07-25 DOI: 10.1039/D4NH00137K

Graciela Villalpando, Jiaze Xie, Nitish Mathur, Guangming Cheng, Nan Yao and Leslie M. Schoop

引用次数: 0

Strongly polarized color conversion of isotropic colloidal quantum dots coupled to fano resonances† 与扇形共振耦合的各向同性胶体量子点的强偏振色彩转换。

IF 8 2区材料科学

Nanoscale Horizons Pub Date : 2024-07-24 DOI: 10.1039/D4NH00101J

Kivanc Gungor, Onur Erdem, Burak Guzelturk, Emre Unal, Shinae Jun, Eunjoo Jang and Hilmi Volkan Demir

{"title":"Strongly polarized color conversion of isotropic colloidal quantum dots coupled to fano resonances†","authors":"Kivanc Gungor, Onur Erdem, Burak Guzelturk, Emre Unal, Shinae Jun, Eunjoo Jang and Hilmi Volkan Demir","doi":"10.1039/D4NH00101J","DOIUrl":"10.1039/D4NH00101J","url":null,"abstract":"Colloidal quantum dots (QDs) offer high color purity essential to high-quality liquid crystal displays (LCDs), which enables unprecedented levels of color enrichment in LCD-TVs today. However, for LCDs requiring polarized backplane illumination in operation, highly polarized light generation using inherently isotropic QDs remains a fundamental challenge. Here, we show strongly polarized color conversion of isotropic QDs coupled to Fano resonances of v-grooved surfaces compatible with surface-normal LED illumination for next-generation QD-TVs. This architecture overcomes the critically oblique excitation of surface plasmon coupled emission by using v-shapes imprinted on the backlight unit (BLU). With isotropic QDs coated on the proposed v-BLU surface, we experimentally measured a far-field polarization contrast ratio of ∼10. Full electromagnetic solution shows Fano line-shape transmission in transverse magnetic polarization allowing for high transmission as an indication for forward-scattering configuration. Of these QDs coupled to the surface plasmon-polariton modes, we observed strong modifications in their emission kinetics revealed by time-resolved photoluminescence spectroscopy and via dipole orientations identified by back focal plane imaging. This collection of findings indicates conclusively that these isotropic QDs are forced to radiate in a linearly polarized state from the patterned planar surface under surface-normal excitation. For next-generation QD-TVs, the proposed polarized color-converting isotropic QDs on such v-BLUs can be deployed in bendable electronic displays.","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 10","pages":" 1756-1765"},"PeriodicalIF":8.0,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141750540","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}

引用次数: 0

Two-dimensional layered material photodetectors: what could be the upcoming downstream applications beyond prototype devices? 二维层状材料光电探测器：除原型设备外，下游应用前景如何？

IF 8 2区材料科学

Nanoscale Horizons Pub Date : 2024-07-24 DOI: 10.1039/D4NH00170B

Yuhang Ma, Huanrong Liang, Xinyi Guan, Shuhua Xu, Meiling Tao, Xinyue Liu, Zhaoqiang Zheng, Jiandong Yao and Guowei Yang

{"title":"Two-dimensional layered material photodetectors: what could be the upcoming downstream applications beyond prototype devices?","authors":"Yuhang Ma, Huanrong Liang, Xinyi Guan, Shuhua Xu, Meiling Tao, Xinyue Liu, Zhaoqiang Zheng, Jiandong Yao and Guowei Yang","doi":"10.1039/D4NH00170B","DOIUrl":"10.1039/D4NH00170B","url":null,"abstract":"With distinctive advantages spanning excellent flexibility, rich physical properties, strong electrostatic tunability, dangling-bond-free surface, and ease of integration, 2D layered materials (2DLMs) have demonstrated tremendous potential for photodetection. However, to date, most of the research enthusiasm has been merely focused on developing novel prototype devices. In the past few years, researchers have also been devoted to developing various downstream applications based on 2DLM photodetectors to contribute to promoting them from fundamental research to practical commercialization, and extensive accomplishments have been realized. In spite of the remarkable advancements, these fascinating research findings are relatively scattered. To date, there is still a lack of a systematic and profound summarization regarding this fast-evolving domain. This is not beneficial to researchers, especially researchers just entering this research field, who want to have a quick, timely, and comprehensive inspection of this fascinating domain. To address this issue, in this review, the emerging downstream applications of 2DLM photodetectors in extensive fields, including imaging, health monitoring, target tracking, optoelectronic logic operation, ultraviolet monitoring, optical communications, automatic driving, and acoustic signal detection, have been systematically summarized, with the focus on the underlying working mechanisms. At the end, the ongoing challenges of this rapidly progressing domain are identified, and the potential schemes to address them are envisioned, which aim at navigating the future exploration as well as fully exerting the pivotal roles of 2DLMs towards the practical optoelectronic industry.","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 10","pages":" 1599-1629"},"PeriodicalIF":8.0,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141750559","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}

引用次数: 0

Correction: Supramolecular nanocapsules as two-fold stabilizers of outer-cavity sub-nanometric Ru NPs and inner-cavity ultra-small Ru clusters 更正：超分子纳米胶囊作为外腔亚纳米 Ru NPs 和内腔超小 Ru 簇的双重稳定剂。

IF 8 2区材料科学

Nanoscale Horizons Pub Date : 2024-07-23 DOI: 10.1039/D4NH90054E

Ernest Ubasart, Irene Mustieles Marin, Juan Manuel Asensio, Gabriel Mencia, Ángela M. López-Vinasco, Cristina García-Simón, Iker del Rosal, Romuald Poteau, Bruno Chaudret and Xavi Ribas

引用次数: 0

Synthesis of chiral graphene structures and their comprehensive applications: a critical review 手性石墨烯结构的合成及其综合应用：评论

IF 8 2区材料科学

Nanoscale Horizons Pub Date : 2024-07-23 DOI: 10.1039/D4NH00021H

Animesh Sinha and Hongyun So

引用次数: 0

Unraveling the composition of each atomic layer in the MXene/MAX phase structure – identification of oxycarbide, oxynitride, and oxycarbonitride subfamilies of MXenes† 揭示 MXene/MAX 相结构中每个原子层的组成 - 确定 MXenes 的氧碳化物、氧氮化物和氧碳氮化物亚家族

IF 8 2区材料科学

Nanoscale Horizons Pub Date : 2024-07-19 DOI: 10.1039/D4NH00151F

Paweł Piotr Michałowski

{"title":"Unraveling the composition of each atomic layer in the MXene/MAX phase structure – identification of oxycarbide, oxynitride, and oxycarbonitride subfamilies of MXenes†","authors":"Paweł Piotr Michałowski","doi":"10.1039/D4NH00151F","DOIUrl":"10.1039/D4NH00151F","url":null,"abstract":"MXenes, the largest known family of 2D materials, are known for their complicated structure consisting of many different elements. Their properties can be finely tuned by precise engineering of the composition of each atomic layer. Thus it is necessary to further develop the secondary ion mass spectrometry (SIMS) technique which can unambiguously identify each element with atomic precision. The newly established protocol of deconvolution and calibration of the SIMS data enables layer-by-layer characterization of MAX phase and MXene samples with ±1% accuracy. Such precision is particularly important for samples that consist of several different transition metals in their structure. This confirms that most MXenes contain a substantial amount of oxygen in the X layers, thus enabling the identification of oxycarbide, oxynitride, and oxycarbonitride subfamilies of these materials. It can also be applied for under- and over-etched samples and to determine the exact composition of termination layers. Generally, the SIMS technique may provide invaluable support in the synthesis and optimization of MAX phase and MXene studies.","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 9","pages":" 1493-1497"},"PeriodicalIF":8.0,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737421","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}

引用次数: 0

Dominant higher-order vortex gyromodes in circular magnetic nanodots† 环形磁性纳米点中的主要高阶涡旋回旋。

IF 8 2区材料科学

Nanoscale Horizons Pub Date : 2024-07-19 DOI: 10.1039/D4NH00145A

Artem V. Bondarenko, Sergey A. Bunyaev, Amit K. Shukla, Arlete Apolinario, Navab Singh, David Navas, Konstantin Y. Guslienko, Adekunle O. Adeyeye and Gleb N. Kakazei

引用次数: 0

Interaction- and phonon-induced topological phase transitions in double helical liquids† 双螺旋液体中相互作用和声子诱导的拓扑相变

IF 8 2区材料科学

Nanoscale Horizons Pub Date : 2024-07-17 DOI: 10.1039/D4NH00254G

Chen-Hsuan Hsu

{"title":"Interaction- and phonon-induced topological phase transitions in double helical liquids†","authors":"Chen-Hsuan Hsu","doi":"10.1039/D4NH00254G","DOIUrl":"10.1039/D4NH00254G","url":null,"abstract":"Helical liquids, formed by time-reversal pairs of interacting electrons in topological edge channels, provide a platform for stabilizing topological superconductivity upon introducing local and nonlocal pairings through the proximity effect. Here, we investigate the effects of electron–electron interactions and phonons on the topological superconductivity in two parallel channels of such helical liquids. Interactions between electrons in different channels tend to reduce nonlocal pairing, suppressing the topological regime. Additionally, electron–phonon coupling breaks the self duality in the electronic subsystem and renormalizes the pairing strengths. Notably, while earlier perturbative calculations suggested that longitudinal phonons have no effect on helical liquids themselves to the leading order, our nonperturbative analysis shows that phonons can induce transitions between topological and trivial superconductivity, thereby weakening the stability of topological zero modes. Our findings highlight practical limitations in realizing topological zero modes in various systems hosting helical channels, including quantum spin Hall insulators, higher-order topological insulators, and their fractional counterparts recently observed in twisted bilayer systems.","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 10","pages":" 1725-1731"},"PeriodicalIF":8.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/nh/d4nh00254g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141719000","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}

引用次数: 0

Review of neuromorphic computing based on NAND flash memory 基于 NAND 闪存的神经形态计算回顾。

IF 8 2区材料科学

Nanoscale Horizons Pub Date : 2024-07-17 DOI: 10.1039/D3NH00532A

Sung-Tae Lee and Jong-Ho Lee

{"title":"Review of neuromorphic computing based on NAND flash memory","authors":"Sung-Tae Lee and Jong-Ho Lee","doi":"10.1039/D3NH00532A","DOIUrl":"10.1039/D3NH00532A","url":null,"abstract":"The proliferation of data has facilitated global accessibility, which demands escalating amounts of power for data storage and processing purposes. In recent years, there has been a rise in research in the field of neuromorphic electronics, which draws inspiration from biological neurons and synapses. These electronics possess the ability to perform in-memory computing, which helps alleviate the limitations imposed by the ‘von Neumann bottleneck’ that exists between the memory and processor in the traditional von Neumann architecture. By leveraging their multi-bit non-volatility, characteristics that mimic biology, and Kirchhoff's law, neuromorphic electronics offer a promising solution to reduce the power consumption in processing vector–matrix multiplication tasks. Among all the existing nonvolatile memory technologies, NAND flash memory is one of the most competitive integrated solutions for the storage of large volumes of data. This work provides a comprehensive overview of the recent developments in neuromorphic computing based on NAND flash memory. Neuromorphic architectures using NAND flash memory for off-chip learning are presented with various quantization levels of input and weight. Next, neuromorphic architectures for on-chip learning are presented using standard backpropagation and feedback alignment algorithms. The array architecture, operation scheme, and electrical characteristics of NAND flash memory are discussed with a focus on the use of NAND flash memory in various neural network structures. Furthermore, the discrepancy of array architecture between on-chip learning and off-chip learning is addressed. This review article provides a foundation for understanding the neuromorphic computing based on the NAND flash memory and methods to utilize it based on application requirements.","PeriodicalId":93,"journal":{"name":"Nanoscale Horizons","volume":" 9","pages":" 1475-1492"},"PeriodicalIF":8.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141625417","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}

引用次数: 0