AI Article Synopsis
- Advanced electron microscopy techniques, like AC-TEM and AC-HAADF-STEM, have enhanced the study of nanomaterials by improving resolution and minimizing image distortion.
- The research utilized a JEOL 2200FS microscope at the University of York to observe single metal atoms in catalysts and analyze various nanostructures, including graphene.
- New methodologies for in situ studies reveal dynamic behavior in nanomaterials, paving the way for future explorations at the atomic scale.
Article Abstract
Structural and compositional studies of nanomaterials of technological importance have been carried out using advanced electron microscopy methods, including aberration-corrected transmission electron microscopy (AC-TEM), AC-high angle annular dark field scanning TEM (AC-HAADF-STEM), AC-energy filtered TEM, electron-stimulated energy dispersive spectroscopy in the AC-(S)TEM and high-resolution TEM (HRTEM) with scanning tunneling microscopy (STM) holder. The AC-EM data reveal improvements in resolution and minimization in image delocalization. A JEOL 2200FS double-AC field emission gun TEM/STEM operating at 200 kV in the Nanocentre at the University of York has been used to image single metal atoms on crystalline supports in catalysts, grain boundaries in nanotwinned metals, and nanostructures of tetrapods. Joule heating studies using HRTEM integrated with an STM holder reveal in situ crystallization and edge reconstruction in graphene. Real-time in situ AC-HAADF-STEM studies at elevated temperatures are described. Dynamic in-column energy filtering in an AC environment provides an integral new approach to perform dynamic in situ studies with aberration correction. The new results presented here open up striking new opportunities for atomic scale studies of nanomaterials and indicate future development directions.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/jemt.20933 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
[Homer 1a overexpression alleviates nerve injury in mice with traumatic brain injury by regulating autophagy mediated by PI3K/AKT/mTOR pathway].
Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi
January 2025
Department of Neurosurgery, Wuhan NO.1 Hospital, Wuhan 432000, China. *Corresponding author, E-mail:
Objective To investigate the effects and molecular mechanism of Homer protein homolog 1a (Homer 1a) overexpression on nerve injury in mice with traumatic brain injury (TBI). Methods Sixty male C57BL/6 mice were randomly divided into five groups: sham group, TBI group, empty lentivirus (Lv-NC) group, Homer 1a overexpression lentivirus (Lv-Homer 1a) group and Lv-Homer 1a + 740 Y-P group, with 12 mice in each group. The lentivirus was orthotopic injected into the cerebral cortex of mice 5 d before modeling, while 740 Y-P was injected intraperitoneally 1 d before modeling.
View Article and Find Full Text PDFThe microbiota of cork and yellow stain as a model for a new route for the synthesis of chlorophenols and chloroanisoles from the microbial degradation of suberin and/or lignin.
Microbiome
January 2025
Instituto de Investigación de La Viña y El Vino, Escuela de Ingeniería Agraria, Universidad de León, Avenida de Portugal, 41, León, 24009, Spain.
Article Synopsis
- Cork is primarily used for wine bottle stoppers, but it can contain 2,4,6-trichloroanisole, which causes a musty odor that negatively affects wine quality and leads to financial losses.
- The presence of yellow stain in cork indicates a degradation linked to higher microbial populations, particularly filamentous fungi that break down lignin, and this microbiota contributes to the formation of chlorophenols and chloroanisoles.
- Research identified specific fungal and bacterial species associated with yellow stain and demonstrated that certain strains can convert p-hydroxybenzoate into phenol, which can then be chlorinated, potentially leading to the development of 2,4,6-trichlorophenol.
Comparison of mechanical properties and shaping performance of ProGlider and ProTaper ultimate slider.
BMC Oral Health
January 2025
Department of Conservative Dentistry, College of Dentistry, Kyung Hee University, 26-6, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02453, Republic of Korea.
Background: This study aims to compare design, phase transformation behavior, and torsional resistance of the ProGlider (PG) and ProTaper ultimate slider (PUS) and to compare the performance of two files in the glide-path preparation of a double-curved artificial canal.
Methods: Scanning electron microscopy, micro-computed tomography, and differential scanning calorimetry were used to characterize the samples. A torsional resistance test was performed to obtain ultimate strength and distortion angle.
A Native LH1-RC-HiPIP Supercomplex from an Extremophilic Phototroph.
Commun Biol
January 2025
Faculty of Science, Ibaraki University, Mito, Japan.
Halorhodospira (Hlr.) halophila strain BN9622 is an extremely halophilic and alkaliphilic purple phototrophic bacterium and has been widely used as a model for exploring the osmoadaptive and photosynthetic strategies employed by phototrophic extreme halophiles that enable them to thrive in hypersaline environments. Here we present the cryo-EM structures of (1) a unique native Hlr.
View Article and Find Full Text PDFSelenium nanoparticles modified niobium MXene for non-enzymatic detection of glucose.
Sci Rep
January 2025
Department of Chemistry, Amrita School of Physical Sciences Coimbatore, Amrita Vishwa Vidyapeetham, Coimbatore, 641112, India.
Article Synopsis
- Glucose sensing is essential for managing diabetes, and this study explores NbCT-selenium nanoparticles for effective nonenzymatic glucose detection.
- The composite material was characterized using techniques like scanning and transmission electron microscopy, and it was tested on a gold disc electrode in an alkaline solution.
- The sensor operates at a low overpotential of 0.16 V, demonstrating a detection range of 2 to 30 mM, with a notable sensitivity of 4.15 µA mM cm and a detection limit of 1.1 mM.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!