We report on an element-dependent critical size for argon physisorption at 80 K on transition-metal-doped silicon clusters. Argon does not attach to elemental silicon clusters but only to surface-located transition-metal atoms. Thus physisorption provides structural information. Specifically, the minimal cluster size for the formation of endohedral singly metal-doped silicon cages has been determined. The observed critical size for doubly doped silicon clusters indicates that larger caged molecules can be formed, eventually leading to the growth of metal-doped silicon nanorods.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.99.063401 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Erbium-implanted silicon (Er:Si) holds promise for quantum networking, but the formation of multiple Er centers poses a challenge. We show that the cubic center (Er-C) has C or lower symmetry and propose all Er centers range between full Si- and full O-coordination. By co-implanting Si with Er and O (both 10cm) and increasing the thermal anneal quenching rate from ∼100 °C/s to ∼1000 °C/s, we shifted the dominant optically active center from ErO clusters to the Er-C center with mixed Si and O coordination.
View Article and Find Full Text PDFEfficacy of molecularly diversified phosphorus-solubilizing rhizobacterial isolates in phytostimulation, antimicrobial attributes and phosphorus-transporter genes mediated plant growth performance in maize (Zea mays L.).
Plant Physiol Biochem
January 2025
All India Network Project on Soil Biodiversity-Biofertilizers, ICAR-Indian Institute of Soil Science, Bhopal, 462038, India.
This study evaluated a dual management approach to enhance plant-growth by improving soil fertility, reducing pathogenic stress using PGPR that affect phosphorus-transporter (pht) genes. Among 213 maize rhizobacterial isolates, 40 demonstrated the ability to solubilize tri-calcium phosphate, potassium, zinc, and silicon, showing various PGP traits. Nine of these isolates exhibited significant antagonistic activity against the plant pathogens Colletotrichum chlorophyti and Xanthomonas axonopodis.
View Article and Find Full Text PDFCRISPR-associated Plasmonic Colorimeter Method (Ca-PCM): A real-time RGB detection system for gold nanoparticles-based nucleic acid biosensors.
Anal Chim Acta
February 2025
Fundación IMDEA Nanociencia, Madrid, Spain; Division of Hematopoietic Innovative Therapies, Innovative Therapies Unit. Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040, Madrid, Spain; Advanced Therapies Unit, Instituto de Investigación Sanitaria Fundación Jiménez Díaz (IIS-FJD, UAM), 28040, Madrid, Spain. Electronic address:
Background: The detection of genetic sequences represents the gold standard procedure for species discrimination, genetic characterisation of tumours, and identification of pathogens. The development of new molecular detection methods, accessible and cost effective, is of great relevance. Biosensors based on plasmonic nanoparticles, such as gold nanoparticles (AuNPs), provide a powerful and versatile platform for highly sensitive, economic, user-friendly and label-free sensing.
View Article and Find Full Text PDFPhenotypic diversity of CTCs and tdEVs in liquid biopsies of tumour-draining veins is linked to poor prognosis in colorectal cancer.
J Exp Clin Cancer Res
January 2025
Department of General, Visceral and Pediatric Surgery, University Hospital and Medical Faculty of Heinrich-Heine University Düsseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.
Background: Circulating tumour cells (CTCs) and tumour-derived extracellular vesicles (tdEVs) have great potential for monitoring therapy response and early detection of tumour relapse, facilitating personalized adjuvant therapeutic strategies. However, their low abundance in peripheral blood limits their informative value. In this study, we explored the presence of CTCs and tdEVs collected intraoperatively from a tumour-draining vein (DV) and via a central venous catheter (CVC) prior to tumour resection.
View Article and Find Full Text PDFDual Influence of Size and Electric Field on Gold Nanoparticles: Insights into 2D Monolayer Assembly.
Langmuir
January 2025
Department of Physics, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates.
Self-assembled gold nanoparticles (Au-NPs) possess distinctive properties that are highly desirable in diverse nanotechnological applications. This study meticulously explores the size-dependent behavior of Au-NPs under an electric field, specifically focusing on sizes ranging from 5 to 40 nm, and their subsequent assembly into 2D monolayers on an n-type silicon substrate. The primary objective is to refine the assembly process and augment the functional characteristics of the resultant nanostructures.
View Article and Find Full Text PDFWant 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!