Journal of microscopy最新文献

{"title":"Correction to “Image quality evaluation for FIB-SEM images”","authors":"","doi":"10.1111/jmi.13355","DOIUrl":"10.1111/jmi.13355","url":null,"abstract":"<p>Roldan, D., Redenbach, C., Schladitz, K., Kübel, C., &amp; Schlabach, S. (2024). Image quality evaluation for FIB-SEM images. <i>Journal of Microscopy</i>, <i>293</i>(2), 98-117. https://onlinelibrary.wiley.com/doi/10.1111/jmi.13254</p><p>Diego Roldan's affiliation appears as “National University, Bogotá, Colombia”</p><p>The correct affiliation is “Departamento de Matemáticas, Universidad Nacional de Colombia, Bogotá, Colombia”</p><p>We apologise for this error.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"296 1","pages":"108"},"PeriodicalIF":1.5,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jmi.13355","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142108249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial light modulation for interferometric scattering microscopy","authors":"Vivien Walter,&nbsp;Christopher Parperis,&nbsp;Yujie Guo,&nbsp;Mark Ian Wallace","doi":"10.1111/jmi.13347","DOIUrl":"10.1111/jmi.13347","url":null,"abstract":"<p>Interferometric scattering (iSCAT) microscopy enables high-speed and label-free detection of individual molecules and small nanoparticles. Here we apply point spread function engineering to provide adaptive control of iSCAT images using spatial light modulation. With this approach, we demonstrate improved dynamic spatial filtering, real-time background subtraction, focus control, and signal modulation based on sample orientation.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"297 1","pages":"88-95"},"PeriodicalIF":1.5,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11629933/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142055828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diffusion distribution model for damage mitigation in scanning transmission electron microscopy","authors":"Amirafshar Moshtaghpour,&nbsp;Abner Velazco-Torrejon,&nbsp;Daniel Nicholls,&nbsp;Alex W. Robinson,&nbsp;Angus I. Kirkland,&nbsp;Nigel D. Browning","doi":"10.1111/jmi.13351","DOIUrl":"10.1111/jmi.13351","url":null,"abstract":"<p>Despite the widespread use of Scanning Transmission Electron Microscopy (STEM) for observing the structure of materials at the atomic scale, a detailed understanding of some relevant electron beam damage mechanisms is limited. Recent reports suggest that certain types of damage can be modelled as a diffusion process and that the accumulation effects of this process must be kept low in order to reduce damage. We therefore develop an explicit mathematical formulation of spatiotemporal diffusion processes in STEM that take into account both instrument and sample parameters. Furthermore, our framework can aid the design of Diffusion Controlled Sampling (DCS) strategies using optimally selected probe positions in STEM, that constrain the cumulative diffusion distribution. Numerical simulations highlight the variability of the cumulative diffusion distribution for different experimental STEM configurations. These analytical and numerical frameworks can subsequently be used for careful design of 2- and 4-dimensional STEM experiments where beam damage is minimised.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"297 1","pages":"57-77"},"PeriodicalIF":1.5,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11629935/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142017749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of ZnO nanoparticle-doped dental adhesives on enamels with fluorosis: Electron microscopy, elemental composition and shear bond strength analysis","authors":"Rafael Álvarez-Chimal,&nbsp;César Rodríguez-Cruz,&nbsp;Carlos Alvarez-Gayosso,&nbsp;Jesús A. Arenas-Alatorre","doi":"10.1111/jmi.13353","DOIUrl":"10.1111/jmi.13353","url":null,"abstract":"&lt;p&gt;This study aimed to evaluate dental adhesives containing different concentrations of zinc oxide nanoparticles (ZnO-NPs) for their use in the treatment of dental fluorosis, observe the interaction of the adhesive on healthy enamel surfaces and with mild and moderate fluorosis, measure the adhesive strength and fluorosis, and determine the phosphorus (P) and calcium (Ca) content on these surfaces, as a reference for the potential use of this adhesive with ZnO-NPs for dental fluorosis treatment.&lt;/p&gt;&lt;p&gt;Transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM) were used to characterise the ZnO-NPs and analyse the weight percentages of P and Ca in the enamel using X-ray energy dispersive spectroscopy (EDS) and the adhesive strength using a universal mechanical testing machine.&lt;/p&gt;&lt;p&gt;FESEM characterisation revealed that the ZnO-NPs were less than 100 nm in size, with quasi-spherical and hexagonal prism shapes. The synthesis of the ZnO-NPs was confirmed by TEM, revealing their hexagonal crystalline structure. The adhesive strength by the universal mechanical testing machine showed that the adhesive with a 3% wt. concentration of ZnO-NPs was better in the three groups of teeth, showing higher adhesive strength in teeth with mild (15.15 MPa) and moderate (12.76 MPa) fluorosis surfaces, and was even higher than that in healthy teeth (9.65 MPa).&lt;/p&gt;&lt;p&gt;EDS analysis showed that teeth with mild and moderate fluorosis had the highest weight percentages of P and Ca, but there were no statistically significant differences compared to healthy teeth and teeth treated with adhesives.&lt;/p&gt;&lt;p&gt;&lt;b&gt;Lay description&lt;/b&gt;: This study focused on testing a new dental adhesive containing small particles called ZnO nanoparticles (ZnO-NPs). This study aimed to demonstrate whether this adhesive with ZnO-NPs could be useful for treating dental fluorosis by improving its adhesion to teeth.&lt;/p&gt;&lt;p&gt;One of the first objectives was to determine whether the dental adhesive could adhere better to teeth affected by mild or moderate fluorosis than to healthy teeth by measuring whether the levels of two important elements for healthy teeth, calcium (Ca) and phosphorus (P), were affected by the adhesive.&lt;/p&gt;&lt;p&gt;The size and shape of the small particles and teeth with mild or moderate fluorosis were observed using scanning electron microscopy. The nanoparticles were small (&lt; 100 nm) and had specific quasi-spherical and hexagonal prismatic shapes. More damage to the enamel was observed in teeth with mild or moderate fluorosis than in healthy teeth.&lt;/p&gt;&lt;p&gt;The adhesive strength test demonstrated that the dental adhesive with 3% ZnO-NPs had the best adhesion on all healthy conditions of teeth. It was particularly effective in teeth with mild or moderate fluorosis.&lt;/p&gt;&lt;p&gt;Finally, the evaluation of the levels of P and Ca on the enamel showed that teeth with fluorosis had higher levels of these elements, but using the dental adhesive with ZnO-NPs did not change ","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"297 1","pages":"78-87"},"PeriodicalIF":1.5,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11629932/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142017750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction to “Comparison of holotomographic microscopy and coherence-controlled holographic microscopy”","authors":"","doi":"10.1111/jmi.13354","DOIUrl":"10.1111/jmi.13354","url":null,"abstract":"<p>Chvalova, V., Vomastek, T., &amp; Grousl, T. (2024). Comparison of holotomographic microscopy and coherence-controlled holographic microscopy. <i>Journal of Microscopy</i>, <i>294</i>(1), 5–13. https://onlinelibrary.wiley.com/doi/10.1111/jmi.13260</p><p>In the Acknowledgements, the grant number “Ministry of Health project NU22-03-00197 (to TV)” was incorrect. This should have read: “Ministry of Health project NU23-03-00557 (to TV)”.</p><p>We apologise for this error.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"296 1","pages":"107"},"PeriodicalIF":1.5,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jmi.13354","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142017748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An alignment algorithm using coherent twin boundaries as internal reference in 3D-EBSD","authors":"Heng Li,&nbsp;Shuang Xia,&nbsp;Qin Bai,&nbsp;Tingguang Liu,&nbsp;Yong Zhang","doi":"10.1111/jmi.13352","DOIUrl":"10.1111/jmi.13352","url":null,"abstract":"<p>A three-dimensional (3D) microstructural volume is reconstructed from a stack of two-dimensional sections which was obtained by serial sectioning coupled with electron back scattering diffraction (EBSD) mapping of a 316L austenitic stainless steel. A new alignment algorithm named linear translation by minimising the indicator (LTMI) is proposed to reduce the translational misalignments between adjacent sections by referencing to coherent twin boundaries which are flat and lying on {111} planes. The angular difference between the measured orientation of a flat twin boundary and that of the {111} plane is used as an indicator of the accuracy of the alignment operations. This indicator is minimised through linear translations of the centroids of triangular facets, which constitute grain boundaries at a distance not restricted by the in-plane step size of the EBSD maps. And hence the systematic trend in the translational misalignments can be effectively reduced. The LTMI alignment procedure proposed herein effectively corrects the misalignments remained by other methods on a 3D-EBSD data prepared using serial sectioning methods. The accuracy in distinguishing between coherent and incoherent twin boundaries is significantly improved.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"297 1","pages":"43-56"},"PeriodicalIF":1.5,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141988183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TOC - Issue Information","authors":"","doi":"10.1111/jmi.13202","DOIUrl":"10.1111/jmi.13202","url":null,"abstract":"","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"295 3","pages":"215-216"},"PeriodicalIF":1.5,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jmi.13202","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of the Ag M4,5 EELS edge to study silver nanoparticle corrosion","authors":"JC Brennan,&nbsp;DA MacLaren","doi":"10.1111/jmi.13348","DOIUrl":"10.1111/jmi.13348","url":null,"abstract":"<p>Electron energy loss spectra collected from fresh and corroded silver nanoparticles are compared with those from a number of reference materials, focusing on the M_4,5 edge. Chemical shifts and changes in the energy loss near edge structure (ELNES) are described and found to be sufficient to distinguish metallic silver from chemically oxidised silver. The measurements, in conjunction with electron energy loss spectrum imaging, are used to assess the mechanisms for atmospheric corrosion of silver nanoparticles. We unambiguously assign the corrosion product under atmospheric conditions to be silver sulphide, but show the reaction process to be distinctly inhomogeneous, producing a variety of types of corroded particles.</p><p><b>LAY DESCRIPTION</b>: &gt;Here, we use analytical electron microscopy to track the corrosion of silver nanoparticles and present chemical maps of the corrosion products. We show clear spectroscopic differences between metallic and corroded silver using the M_4,5 electron energy loss spectral feature, which is not commonly studied. Our study shows that corrosion is due to interactions with sulphur in the atmosphere; and the corrosion is not uniform, but appears to develop from specific points on the surface of the nanoparticles.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"297 1","pages":"35-42"},"PeriodicalIF":1.5,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11629928/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141902013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of reinforcement particle size on the corrosion and mechanical properties of spark plasma sintered aluminium matrix composites","authors":"Behzad Sadeghi,&nbsp;Pasquale Cavaliere,&nbsp;Mohsen Sanayei","doi":"10.1111/jmi.13350","DOIUrl":"10.1111/jmi.13350","url":null,"abstract":"<p>In this study, the effects of different sizes of reinforcing particles on the corrosion behaviour and mechanical properties of aluminium (Al)-based composites produced by spark plasma sintering (SPS) are analysed. In the study, the effects of SPS parameters, including electrical power, applied pressure and sintering temperature, on the consolidation process and microstructure evolution of the composite are closely investigated. The results reveal a nuanced relationship between the sintering conditions and the properties of the particles, which in turn determine the sintering dynamics and the formation of the microstructural features. The evaluation of mechanical properties indicates a remarkable influence of particle size distribution on the hardness of the composites, showing an initial improvement with the introduction of nanoparticles, followed by a slight decrease as the balance between nano- and micron-sized Al₂O₃ particles shifts. A scanning electron microscopy (SEM) study demonstrates the influence of particle dimensions on the change of grain boundaries and the spatial arrangement of the composite matrix. Electrochemical experiments in a 0.1 M NaCl solution show a consistent corrosion potential (<i>E</i>_corr) across all samples, while the current densities associated with corrosion (<i>i</i>_corr) show considerable variation. The presence of nano-sized Al₂O₃ particles was found to increase corrosion resistance, in contrast to the detrimental effects observed with larger microparticles. In particular, composites with a bimodal distribution of particle sizes showed a 3.5-fold increase in corrosion resistance compared to pure Al. The specific Al-2n8mAl₂O₃ composite that exhibited active electrochemical properties at elevated potentials without a defined passivation range emphasises the significant role of particle size. This study draws attention to bimodal microstructures as a promising route to achieving uniformity and improved corrosion resistance in Al matrix composites, while pointing to the need for further research to fully elucidate the operative mechanisms.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"297 1","pages":"18-34"},"PeriodicalIF":1.5,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141893612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Annotation and automated segmentation of single-molecule localisation microscopy data","authors":"Oliver Umney,&nbsp;Joanna Leng,&nbsp;Gianluca Canettieri,&nbsp;Natalia A. Riobo-Del Galdo,&nbsp;Hayley Slaney,&nbsp;Philip Quirke,&nbsp;Michelle Peckham,&nbsp;Alistair Curd","doi":"10.1111/jmi.13349","DOIUrl":"10.1111/jmi.13349","url":null,"abstract":"<p>Single Molecule Localisation Microscopy (SMLM) is becoming a widely used technique in cell biology. After processing the images, the molecular localisations are typically stored in a table as <i>xy</i> (or <i>xyz</i>) coordinates, with additional information, such as number of photons, etc. This set of coordinates can be used to generate an image to visualise the molecular distribution, for example, a 2D or 3D histogram of localisations. Many different methods have been devised to analyse SMLM data, among which cluster analysis of the localisations is popular. However, it can be useful to first segment the data, to extract the localisations in a specific region of a cell or in individual cells, prior to downstream analysis. Here we describe a pipeline for annotating localisations in an SMLM dataset in which we compared membrane segmentation approaches, including Otsu thresholding and machine learning models, and subsequent cell segmentation. We used an SMLM dataset derived from dSTORM images of sectioned cell pellets, stained for the membrane proteins EGFR (epidermal growth factor receptor) and EREG (epiregulin) as a test dataset. We found that a Cellpose model retrained on our data performed the best in the membrane segmentation task, allowing us to perform downstream cluster analysis of membrane versus cell interior localisations. We anticipate this will be generally useful for SMLM analysis.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"296 3","pages":"214-226"},"PeriodicalIF":1.5,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jmi.13349","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141875098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}