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Effect of film thickness on phase structure of epitaxial non-doped hafnium oxide films 薄膜厚度对非掺杂氧化铪外延膜相结构的影响。
IF 2.5 3区 工程技术
Micron Pub Date : 2024-12-03 DOI: 10.1016/j.micron.2024.103762
Mengdi He , Tingting Yao , Xuexi Yan , Beibei Qiao , Zhen Qian , Yixiao Jiang , Min Tian , Zhiqing Yang , Chunlin Chen
{"title":"Effect of film thickness on phase structure of epitaxial non-doped hafnium oxide films","authors":"Mengdi He ,&nbsp;Tingting Yao ,&nbsp;Xuexi Yan ,&nbsp;Beibei Qiao ,&nbsp;Zhen Qian ,&nbsp;Yixiao Jiang ,&nbsp;Min Tian ,&nbsp;Zhiqing Yang ,&nbsp;Chunlin Chen","doi":"10.1016/j.micron.2024.103762","DOIUrl":"10.1016/j.micron.2024.103762","url":null,"abstract":"<div><div>HfO<sub>2</sub> has been widely used in the electronics industry as a dielectric material with excellent properties. It has attracted much attention since HfO<sub>2</sub> was first reported to be ferroelectric in 2011. With the continuous advancement of research, various methods such as oxygen vacancy control and interface control have been proven to be able to stabilize the metastable polar o-phase structure in doped hafnium oxide thin films. However, there are still some shortcomings in the relevant issues concerning non-doped hafnium oxide thin film materials. Here, polycrystalline non-doped HfO<sub>2</sub> thin films were grown on SrTiO<sub>3</sub> substrates by pulsed laser deposition (PLD). Atomic force microscopy investigation suggests that the surface roughness of HfO<sub>2</sub> thin films increases as the film thickness increases. X-ray photoelectron spectroscopy analyses indicate that the HfO<sub>2</sub> thin film has a high purity and contain only Hf<sup>4+</sup> ions. The band gap of HfO<sub>2</sub> was measured by valence EELS and UV–visible spectra. Atomic structures of the HfO<sub>2</sub>/SrTiO<sub>3</sub> heterointerface have been studied by the aberration-corrected transmission electron microscopy and energy-dispersive X-ray spectroscopy. The HfO<sub>2</sub>/SrTiO<sub>3</sub> heterointerface is atomically abrupt and incoherent. Our findings suggest that non-doped HfO<sub>2</sub> films with o-phase structure through PLD technology.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"190 ","pages":"Article 103762"},"PeriodicalIF":2.5,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142791714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electron-beam induced Mn oxidation in TEM: Insights into the heating effect of Auger excitation 电子束在TEM中诱导Mn氧化:俄歇激发的加热效应。
IF 2.5 3区 工程技术
Micron Pub Date : 2024-12-03 DOI: 10.1016/j.micron.2024.103763
Sung Bo Lee , Jihye Kwon , Hyoung Seop Kim
{"title":"Electron-beam induced Mn oxidation in TEM: Insights into the heating effect of Auger excitation","authors":"Sung Bo Lee ,&nbsp;Jihye Kwon ,&nbsp;Hyoung Seop Kim","doi":"10.1016/j.micron.2024.103763","DOIUrl":"10.1016/j.micron.2024.103763","url":null,"abstract":"<div><div>Electron-beam irradiation of <em>α</em>-Mn triggers dramatic microstructural transformations. Transmission electron microscopy (TEM) reveals localized thinning and MnO formation within the irradiated area. Reduced thermal conductivity due to thinning suggests significant local temperature rise by electron-beam irradiation. Finite element analysis (FEA) identifies Auger excitation as the dominant heating mechanism, surging temperatures to ∼2300 K with ultrafast cooling. Our findings indicate that the oxidation of Mn under electron-beam irradiation is primarily attributed to beam heating via Auger excitation, rather than defect formation through sputtering. This conclusion is supported by the fact that the maximum energy transferable from the incident electron beam in TEM is below the minimum displacement energy for Mn.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"190 ","pages":"Article 103763"},"PeriodicalIF":2.5,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142785806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Visualizing the Li distribution in an all-solid-state battery composite electrode using combined plasma focused-ion beam microscopy and secondary-ion mass spectroscopy 利用等离子体聚焦离子束显微镜和二次离子质谱技术观察全固态电池复合电极中锂离子的分布
IF 2.5 3区 工程技术
Micron Pub Date : 2024-11-24 DOI: 10.1016/j.micron.2024.103746
Yige Sun , Gareth M. Hughes , Junfu Bu , Junliang Liu , Chris R.M. Grovenor , Patrick S. Grant
{"title":"Visualizing the Li distribution in an all-solid-state battery composite electrode using combined plasma focused-ion beam microscopy and secondary-ion mass spectroscopy","authors":"Yige Sun ,&nbsp;Gareth M. Hughes ,&nbsp;Junfu Bu ,&nbsp;Junliang Liu ,&nbsp;Chris R.M. Grovenor ,&nbsp;Patrick S. Grant","doi":"10.1016/j.micron.2024.103746","DOIUrl":"10.1016/j.micron.2024.103746","url":null,"abstract":"<div><div>Using a Li metal anode, the all-solid-state battery (ASSB) promises a step change in specific energy over Li-ion batteries and the potential for increased battery safety. ASSBs rely critically on the efficient movement of Li charge carriers through a Li-conducting solid electrolyte (SE) separator and throughout a composite cathode (CC) comprising active particles, particulate SE, polymeric binder, and carbon. Unfortunately, there is no readily accessible laboratory method to visualise Li distributions at both particle and electrode scales to help understand and optimise Li electrode dynamics in ASSBs. We report a method to map all electrode elements in a 3D volume, including Li, within a typical ASSB composite cathode. The method combines a xenon plasma focused-ion beam (PFIB) for 3D milling, energy dispersive X-ray spectroscopy (EDS) to map non-Li elements, and secondary ion mass spectrometry (SIMS) to map Li. We manipulate 3D EDS and SIMS datasets into a common format and then recombine them in 3D to differentiate the different materials at high resolution. This new approach can be applied to understand and optimise the role of microstructure in controlling ASSB performance.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"190 ","pages":"Article 103746"},"PeriodicalIF":2.5,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Insights into the cyst organisation and selected morpho-physiological aspects of encystment in Thulinius ruffoi (Parachela, Isohypsibioidea: Doryphoribiidae) 对 Thulinius ruffoi(Parachela,Isohypsibioidea:Doryphoribiidae)包囊组织和某些形态生理学方面的见解
IF 2.5 3区 工程技术
Micron Pub Date : 2024-11-22 DOI: 10.1016/j.micron.2024.103748
Kamil Janelt , Izabela Poprawa
{"title":"Insights into the cyst organisation and selected morpho-physiological aspects of encystment in Thulinius ruffoi (Parachela, Isohypsibioidea: Doryphoribiidae)","authors":"Kamil Janelt ,&nbsp;Izabela Poprawa","doi":"10.1016/j.micron.2024.103748","DOIUrl":"10.1016/j.micron.2024.103748","url":null,"abstract":"<div><div>Organisms actively respond to shifts in their environment, and these responses are evident even among microinvertebrates like tardigrades. Encystment, regarded as a form of diapause, exemplifies a tardigrade’s response to environmental change. Environmental cues and unidentified internal factors regulate this process in tardigrades. While it is known that some species can form cysts, our understanding of encystment in tardigrades remains limited, necessitating further research. We investigated selected morphological and physiological aspects of encystment to improve our understanding of the organisation and physiology of encysted animals. The data collected in this study were used to examine cellular organisation, overall morphology, and anatomy, including changes during cyst formation. We also explored the relationship between the body wall and somatic muscles. This paper provides a comprehensive overview of encysted animals’ organisation, focusing on the integument and somatic muscles, as well as their role in shaping morphology during cyst formation. Additionally, the changes observed in storage cells and their significance in encystment are discussed. Despite time-dependent changes in the storage cells, our data do not support claims of organ histolysis as part of the typical changes occurring during encystment in the species we analysed.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"189 ","pages":"Article 103748"},"PeriodicalIF":2.5,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Atomic force microscopy reveals the influence of substrate collagen concentration and TGF-β on lung fibroblast mechanics 原子力显微镜揭示基底胶原浓度和 TGF-β 对肺成纤维细胞力学的影响
IF 2.5 3区 工程技术
Micron Pub Date : 2024-11-22 DOI: 10.1016/j.micron.2024.103751
Anna Christina Karagkouni , Katerina Polemidiotou , Vasiliki Gkretsi , Andreas Stylianou
{"title":"Atomic force microscopy reveals the influence of substrate collagen concentration and TGF-β on lung fibroblast mechanics","authors":"Anna Christina Karagkouni ,&nbsp;Katerina Polemidiotou ,&nbsp;Vasiliki Gkretsi ,&nbsp;Andreas Stylianou","doi":"10.1016/j.micron.2024.103751","DOIUrl":"10.1016/j.micron.2024.103751","url":null,"abstract":"<div><div>Understanding how extracellular matrix (ECM) stiffness and biochemical factors such as TGF-β affect cell behaviour is critical for elucidating mechanisms underlying several pathologic conditions such as tissue fibrosis and cancer metastasis. This study investigates the effects of varying collagen substrate concentration and consequently varying stiffness conditions along with TGF-β treatment on the morphology, nanomechanical properties, and gene expression of normal human lung fibroblasts (NHLF). Our results reveal that increased substrate stiffness leads to more elongated cell morphology, decreased cellular stiffness, and significant alterations in gene expression related to cytoskeletal organization and myofibroblast activation genes. TGF-β treatment further induces myofibroblast differentiation, as evidenced by increased α-SMA and collagen expression, while also reducing cellular stiffness and promoting a more elongated, invasive phenotype. These findings highlight the critical role of both mechanical and biochemical cues in modulating fibroblast behaviour, with significant implications in fibrosis development and cancer progression.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"189 ","pages":"Article 103751"},"PeriodicalIF":2.5,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spermatogenesis and sperm ultrastructure of the squid, Todarodes pacificus (Cephalopoda: Ommastrephidae) 乌贼 Todarodes pacificus(头足纲:乌贼科)的精子发生和精子超微结构
IF 2.5 3区 工程技术
Micron Pub Date : 2024-11-20 DOI: 10.1016/j.micron.2024.103749
So Ryung Shin , Hyeon Jin Kim , Jung Jun Park , Jung Sick Lee
{"title":"Spermatogenesis and sperm ultrastructure of the squid, Todarodes pacificus (Cephalopoda: Ommastrephidae)","authors":"So Ryung Shin ,&nbsp;Hyeon Jin Kim ,&nbsp;Jung Jun Park ,&nbsp;Jung Sick Lee","doi":"10.1016/j.micron.2024.103749","DOIUrl":"10.1016/j.micron.2024.103749","url":null,"abstract":"<div><div>This study sought to characterize spermatogenesis and mature sperm within the spermatophore of <em>Todarodes pacificus</em>. The process of spermatogenesis in this species can be divided into four types: spermatogonium, spermatocyte, spermatid, and sperm. In spermatogonia, the nucleus occupies most of the cell, and a synaptonemal complex is observed in primary spermatocytes. The karyoplasm of secondary spermatocytes exhibits a clear distinction between euchromatin and heterochromatin. Spermatids can be further divided into early, mid, and late during spermiogenesis. In early spermatids, the karyoplasm appeared granular, and proacrosomal vesicles were found in the apical of nucleus. Mid spermatids featured a fibrillar karyoplasm, with well-developed mitochondria in the midpiece. The nucleus of late spermatids was elongated and rectangular, with a homogenized karyoplasm of increased electron density. A mitochondrial spur was present below the nucleus. In mature sperm within the spermatophore, the nucleus measures approximately 4.5 μM in length, and the karyoplasm has an irregular asterisk- shape with high electron density. The acrosome is blunt-cone shaped and approximately 0.7 μM long, whereas the axoneme of flagellum exhibits a typical 9+2 microtubular structure. One mitochondrial spur was shaped like a long triangular flag, containing numerous mitochondria in its upper region and electron-dense glycogen granules in its lower region.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"189 ","pages":"Article 103749"},"PeriodicalIF":2.5,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative analysis of stomatal characteristics and Erysiphe necator (Schw.) Burrill resistance in diverse Vitis sp. 不同葡萄品种的气孔特征和 Erysiphe necator (Schw.) Burrill 抗性的比较分析
IF 2.5 3区 工程技术
Micron Pub Date : 2024-11-20 DOI: 10.1016/j.micron.2024.103750
M. Ramya Sree , Sanjay K. Singh , Jai Prakash , Chavlesh Kumar , Aundy Kumar , Gyan P. Mishra , Amitha Mithra Sevanthi , B.H. Varun
{"title":"Comparative analysis of stomatal characteristics and Erysiphe necator (Schw.) Burrill resistance in diverse Vitis sp.","authors":"M. Ramya Sree ,&nbsp;Sanjay K. Singh ,&nbsp;Jai Prakash ,&nbsp;Chavlesh Kumar ,&nbsp;Aundy Kumar ,&nbsp;Gyan P. Mishra ,&nbsp;Amitha Mithra Sevanthi ,&nbsp;B.H. Varun","doi":"10.1016/j.micron.2024.103750","DOIUrl":"10.1016/j.micron.2024.103750","url":null,"abstract":"<div><div>Powdery mildew caused by <em>Erysiphe necator</em> poses a major challenge for grapevine cultivation. This study investigates how stomatal and structural traits influence resistance to this pathogen across diverse <em>Vitis</em> genotypes. Microscopic analysis revealed significant variations in stomatal characteristics. The sunken stomata were observed in <em>V. parviflora</em>, <em>V. jacquemontii</em>, <em>V. rupestris</em> x <em>V. berlandieri</em> (110 Richter) and <em>V. rupestris</em> (St. George) with lower stomatal density. Genotypes with raised stomata had larger stomatal complex areas. Following inoculation with <em>E. necator</em> (accession No. 52218), the <em>Vitis</em> genotypes showed a distinct resistance response. Susceptible <em>V. vinifera</em> genotypes had high pathogen penetration rates, with 71 % of infection attempts forming haustoria. In contrast, <em>V. parviflora</em>, <em>V. jacquemontii</em>, and hybrids such as <em>V. rupestris</em> x <em>V. berlandieri</em> and <em>V. riparia</em> x <em>V. cinerea</em> exhibited programmed cell death (PCD)-mediated resistance, arresting up to 55 per cent of penetration attempts limiting hyphal growth. Cryo-SEM images further indicated sparse fungal growth on the resistant genotypes. The genotype <em>V. parviflora</em> possessed dense trichomes and long wax stripes along the epidermal cells covering leaf veins on the adaxial leaf surface, thus causing a physical barrier against the pathogen. Comparative analyses showed that callose deposition and epicuticular wax significantly contributed to early-stage pathogen defence, while reactive oxygen species and rapid PCD activation triggered hypersensitive responses, enhancing wax deposition and active PCD responses are critical for <em>Vitis</em> sp. resistance to powdery mildew, offering valuable insights for breeding programmes.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"189 ","pages":"Article 103750"},"PeriodicalIF":2.5,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142710496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Light and electron microscopy of the micromorphology and development of pycniospores and aeciospores of the sunflower rust, Puccinia helianthi 向日葵锈病 Puccinia helianthi 分生孢子和无孢子的微形态和发育的光学和电子显微镜观察。
IF 2.5 3区 工程技术
Micron Pub Date : 2024-11-16 DOI: 10.1016/j.micron.2024.103733
Zakaria A.M. Baka
{"title":"Light and electron microscopy of the micromorphology and development of pycniospores and aeciospores of the sunflower rust, Puccinia helianthi","authors":"Zakaria A.M. Baka","doi":"10.1016/j.micron.2024.103733","DOIUrl":"10.1016/j.micron.2024.103733","url":null,"abstract":"<div><div>The pathogenic fungus <em>Puccinia helianthi</em>, which causes rust disease and significant economic loss, poses a serious threat to the <em>Helianthus annuus</em> crop. This study is the first to examine the ultrastructure of the spore stages of this rust, aiming to fill the gap in the understanding of Egyptian rusts. The present study aimed to explore the micromorphology and development of pycniospores and aeciospores of <em>Puccinia helianthi</em> on its host<em>,</em> using LM, SEM, and TEM. The immature pycnium grows subepidermally and is bordered by a peripheral layer of pseudoparenchymatous cells. Within the pycnium, uninuclear, compactly packed, and elongated pycniosporophores are formed. Pointed periphyses emerge at the highest point of the pycnium, where numerous pycniospores are produced. The primary pycniospores are then released from the pycniosporophores having an elliptical shape with a wrinkled surface. Aeciospores are produced at the edges of a distinct layer, the peridium with rhomboid-shaped peridial cells. A prosenchymatous stroma develops beneath the hymenium layer (aeciosporophores). Two main types of hyphae can distinguish in this stroma: vacuolated hyphae, at the base of the aecium, and non-vacuolated hyphae with dense, ribosome-rich cytoplasm, oil droplets, and glycogen. Each aeciospore divides to form a young aeciospore and an intercalary cell with elongated or hexagonal shapes and warts on the mature aeciospores. SEM examination reveals cog-like ornaments and refracting bodies on the surfaces of peridial cells and aeciospores. The ultrastructure of these two spore stages is more or less similar to that of other <em>Puccinia</em> species with some differences. The procedures used in this study will assist mycologists in rust identification, taxonomy, and microscopic characterization. In conclusion, this study will provide additional information to help understand the interaction between rusts and their hosts. Future research on ultracytochemical studies may provide insight into controlling these serious pathogens.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"189 ","pages":"Article 103733"},"PeriodicalIF":2.5,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142692881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A tale of two transfers: characterizing polydimethylsiloxane viscoelastic stamping and heated poly bis-A carbonate transfer of hexagonal boron nitride 两种转移的故事:聚二甲基硅氧烷粘弹性冲压和六方氮化硼的加热聚双-A 碳酸酯转移的表征
IF 2.5 3区 工程技术
Micron Pub Date : 2024-11-14 DOI: 10.1016/j.micron.2024.103747
Pia Bhatia , Trey T. Shin , Kyril Kavetsky , Benjamin N. Sailors , George Siokos , Alexandra Sofia Uy-Tioco , Rachael N. Keneipp , Jordan A. Gusdorff , Lee C. Bassett , Marija Drndić
{"title":"A tale of two transfers: characterizing polydimethylsiloxane viscoelastic stamping and heated poly bis-A carbonate transfer of hexagonal boron nitride","authors":"Pia Bhatia ,&nbsp;Trey T. Shin ,&nbsp;Kyril Kavetsky ,&nbsp;Benjamin N. Sailors ,&nbsp;George Siokos ,&nbsp;Alexandra Sofia Uy-Tioco ,&nbsp;Rachael N. Keneipp ,&nbsp;Jordan A. Gusdorff ,&nbsp;Lee C. Bassett ,&nbsp;Marija Drndić","doi":"10.1016/j.micron.2024.103747","DOIUrl":"10.1016/j.micron.2024.103747","url":null,"abstract":"<div><div>Two-dimensional (2D) materials have many applications ranging from heterostructure electronics to nanofluidics and quantum technology. In order to effectively utilize 2D materials towards these ends, they must be transferred and integrated into complex device geometries. In this report, we investigate two conventional methods for the transfer of 2D materials: viscoelastic stamping with polydimethylsiloxane (PDMS) and a heated transfer with poly bis-A carbonate (PC). We use both methods to transfer mechanically-exfoliated flakes of hexagonal boron nitride onto silicon nitride (SiN<sub>x</sub>) substrates and characterize the resulting transfers using atomic force microscopy (AFM), aberration-corrected scanning transmission electron microscopy (AC-STEM) and electron energy loss spectroscopy (EELS). We find that <em>both</em> transfer methods yield flakes with significant and comparable residue (within the limitations of our study on eight samples). Qualitative interpretation of EELS maps demonstrates that this residue is comprised of silicon, carbon and oxygen for both transfer methods. Quantitative analysis of AC-STEM images reveals that the area covered in residue is on average, slightly lower for PDMS transfers (31 % ± 1 %), compared to PC transfers (41 % ± 4 %). This work underscores the importance of improving existing transfer protocols towards applications where cleaner materials are critical, as well as the need for robust methods to clean 2D materials.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"189 ","pages":"Article 103747"},"PeriodicalIF":2.5,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A histological procedure for the study of insect chitinized tissues in light microscopy 用光学显微镜研究昆虫几丁质化组织的组织学程序。
IF 2.5 3区 工程技术
Micron Pub Date : 2024-11-13 DOI: 10.1016/j.micron.2024.103744
Manuela Gallardo , María Valladolid
{"title":"A histological procedure for the study of insect chitinized tissues in light microscopy","authors":"Manuela Gallardo ,&nbsp;María Valladolid","doi":"10.1016/j.micron.2024.103744","DOIUrl":"10.1016/j.micron.2024.103744","url":null,"abstract":"<div><div>We present a procedure to obtain histological preparations of insect cuticles for their observation in ligth microscopy. The use of EDTA (ethylendiaminetetraacetic acid), as a chelator of certain metals present in chitin, soften the tissues and allows us to cut them. The tissues were embbeding in plastic resines in two different protocols and cutted by cryostat (20–30 μm) and ultramicrotome (4 μm) respectively. This procedure, based on traditional histology products, allows us to obtain preparations observable under an optical microscope, facilitating the study of the internal structure of the cuticule, e.g. visualizing the different layers or structures such as glands or setae.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"188 ","pages":"Article 103744"},"PeriodicalIF":2.5,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142644006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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