AI Article Synopsis
- Researchers grew nano-sized ZnO embedded in SiO2 layers using radio-frequency magnetron sputtering.
- The optical properties were analyzed through absorption and PL (Photoluminescence) spectra at room temperature, showing a blue shift in absorption as the size of ZnO decreased, indicating a stronger quantum size effect.
- PL spectra revealed two emission peaks at 387 nm (UV emission from free-excitons) and 441 nm (blue emission from oxygen vacancy transitions), with further confirmation from time-resolved spectra and luminescence decay curves.
Article Abstract
Nano-size ZnO embedded in SiO2 layers were grown by radio-frequency magnetron sputtering. Absorption spectra and PL spectra were employed to study the optical character of the samples at room temperature. Absorption spectra blue-shifted when the size of nano-meter ZnO decreased, which indicated that quantum size effect became stronger with decreasing the size of ZnO. PL spectra show two peaks at about 387 and 441 nm, respectively. It was concluded that the UV emission originates from the radiative recombination of free-exciton, and the blue emission is due to the electron transition from donor levels of oxygen vacancies to the top of valence band. The origin of the two peaks is demonstrated by time-resolved spectra and luminescence decay curve.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Novel nanoconjugates of metal oxides and natural red pigment from the endophyte Monascus ruber using solid-state fermentation.
Microb Cell Fact
September 2024
Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland.
Background: Antimicrobial resistance has emerged as a major global health threat, necessitating the urgent development of new antimicrobials through innovative methods to combat the rising prevalence of resistant microbes. With this view, we developed three novel nanoconjugates using microbial natural pigment for effective application against certain pathogenic microbes.
Results: A natural red pigment (RP) extracted from the endophyte Monascus ruber and gamma rays were applied to synthesize RP-ZnO, RP-CuO, and RP-MgO nanoconjugates.
To understand the impact of binary doping in ZnO, nanosized Zn(Ag, Ni)O systems were synthesized by the sol-gel method. The amount of Ag was fixed at 2 at%, and that of Ni was varied from 1 to 15 at%. Ni incorporation equal to or beyond 3 at% gave rise to the development of the NiO phase.
View Article and Find Full Text PDFSynthesis and characterization of Pyrus communis fruit extract synthesized ZnO NPs and assessed their anti-diabetic and anti-microbial potential.
Environ Res
October 2024
Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box:2455, Riyadh, 11451, Saudi Arabia. Electronic address:
The fruit Pyrus communis, owing to its presence of phenolics and flavonoids, was chosen for its nanoparticle's reducing and stabilizing properties. Furthermore, the zinc metal may be nano-absorbed by the human body. As a result, the study involves synthesizing zinc oxide nanoparticles (ZnO NPs) from P.
View Article and Find Full Text PDFConcurrent application of bacterial-mediated and mycosynthesized ZnO nanofungicides to maintain high ascorbic acid and delay postharvest decay of apricot.
Microb Pathog
September 2023
Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan. Electronic address:
Quality of apricot fruit is affected by different biotic stresses during growth, harvesting and storage. Due to fungal attack, huge losses of its quality and quantity are observed. The present research was designed for the diagnoses and management of postharvest rot disease of apricot.
View Article and Find Full Text PDFBiocontrol of Fruit Rot of Using Zinc Oxide Nanoparticles Synthesized in .
Micromachines (Basel)
September 2022
Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan.
Article Synopsis
- Lychee is a popular fruit species affected by various stresses, with fruit rot posing a significant problem.
- A study identified the disease-causing pathogen and demonstrated the effectiveness of zinc oxide nanoparticles (ZnO NPs) in controlling lychee fruit rot, showing maximum inhibition at a concentration of 1.0 mg/mL.
- Characterization techniques like FTIR, X-ray diffraction, EDX, and SEM confirmed the properties of ZnO NPs, suggesting their potential as a safer alternative to chemical fungicides for wider agricultural use.
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!