Silicon reach-silicon-oxide (SRSO) film containing silicon nanoclusters was obtained by the reactive magnetron sputtering. Photoluminescence (PL) spectra were measured as a function of temperature at different excitation wavelengths and additionally at different excitation power densities. Obtained PL spectra characterize by two emission bands centered at 1.6 and 2.4 eV. For these bands, temperature behaviour of PL intensities strongly differs but clearly correlate each other. Moreover, it has been observed that obtained PL intensities versus temperature exhibit a strong dependence on the excitation power density in the low temperature range.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1166/jnn.2010.2453 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Dual-signal fluorescence detection of miRNA based on nano-gold molecular beacon and in-situ generated silver nanoclusters coupled with multiple amplification.
Talanta
December 2024
College of Chemistry and Molecular Engineering. Qingdao University of Science and Technology, Qingdao, 266042, China. Electronic address:
In this work, a new dual-signal fluorescence strategy based on nano-gold molecular beacon (MB) and in-situ generated silver nano-clusters (NCs) coupled with multiple amplification technique was developed for sensitive detection of miRNA (let-7b). miRNA can recognize both hairpin probe (HP) and auxiliary DNA, inducing dual-cycle amplification-process to release plenty of DNA S2. As the report probe carboxyfluorescein (FAM) was modified on Au nanoparticles (AuNPs), the fluorescent signal was quenched due to the fluorescence resonance energy transfer (FRET).
View Article and Find Full Text PDFUnveiling the Formation Mechanism for Binary Semiconductor Nanoclusters: a Two-Step Pathway to a Double-Shell Structured Copper Sulfide Nanocluster.
ACS Nano
December 2024
Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.
Article Synopsis
- * The process incorporates a catalyst (CuO) which leads to the formation of a stable [-Cu-S-Cu-] framework and results in a high-nuclearity assembly nanocluster specifically using Cu(I)-butyl thiolate and a carboxylate acid as precursors.
- * Notably, unlike traditional methods that involve reducing copper to its elemental form (Cu(0) or Cu(I)), this innovative technique oxidizes the metal, generating highly charged Cu(II) ions within the resulting copper sulfide nanocluster.
Tailoring Superatomic Stability with Transition Metals in Silicon Cages: Shrinking to M@Si (M = Re, Os, Ir).
J Phys Chem Lett
November 2024
Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi Kohoku-ku, Yokohama 223-8522, Japan.
The design of materials with intriguing electronic properties is crucial for advancing nanoscale technologies, where precise control over atomic structure and electronic behavior is essential. Metal-encapsulating silicon cage superatoms (SAs) provide a new paradigm for molecular-scale material design, allowing fine-tuning of both structure and electronic characteristics. The formation of superatoms mimicking halogens, noble gases, and alkali metals has been well-studied, particularly with M@Si, where early transition metals from groups 3 to 5 stabilize within a Si cage, achieving a 68-electron configuration.
View Article and Find Full Text PDFA fluorescence and colorimetric dual-mode aptasensor for kanamycin detection.
Biosens Bioelectron
January 2025
Department of Chemistry, University of Otago, Dunedin, 9016, New Zealand. Electronic address:
This study presents the development of a dual-mode aptasensor for the sensitive detection of kanamycin (KAN), utilizing both fluorescence and colorimetric signals. The aptasensor was constructed using amino-functionalized silica nanoparticles (SiO) combined with copper nanoclusters (CuNCs) and DNA-templated silver nanoclusters (DNA-AgNCs). Encapsulating CuNCs within SiO (CuNCs@SiO) enhanced their stability by shielding them from environmental interference, while maintaining their bright blue fluorescence as a reference signal.
View Article and Find Full Text PDFDendritic mesoporous silica loaded with gold nanoclusters and their application in immunochromatographic assay.
Mikrochim Acta
November 2024
Technology Innovation Center of Mass Spectrometry for State Market Regulation, Center for Advanced Measurement Science, National Institute of Metrology, Beijing, 100029, People's Republic of China.
Novel green-emitting fluorescent microspheres (GreFMPs) were assembled by loading highly luminescent gold nanoclusters (Arg/ATT/AuNCs) on dendritic mesoporous silica nanoparticles (DMSNs) via PEI-mediated electrostatic adsorption. The fluorescence microspheres exhibit excellent monodispersion with average diameters about (254.5 ± 34.
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!