ArticleMaterials (Basel, Switzerland)2020
Effects of Temperature on the Morphology and Optical Properties of Spark Discharge Germanium Nanoparticles.
Article in Materials (Basel, Switzerland), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Size-Dependent Oxidation of Copper Nanostructured Electrocatalysts Produced by Spark Ablation.ACS electrochemistry · 2026Article
- Exploring the Potential of Endophytic Microorganisms and Nanoparticles for Enhanced Water Remediation.Molecules (Basel, Switzerland) · 2024Review
- Impact of Growth Temperature of Lead-Oxide Nanostructures on the Attenuation of Gamma Radiation.ACS omega · 2023Article
- Spark Discharge Synthesis and Characterization of Ge/Sn Janus Nanoparticles.Nanomaterials (Basel, Switzerland) · 2023Article
- Aerosol Dry Printing for SERS and Photoluminescence-Active Gold Nanostructures Preparation for Detection of Traces in Dye Mixtures.Nanomaterials (Basel, Switzerland) · 2022Article
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Authors and funding
8 authors.
Funding
Abstract
We report the spark discharge synthesis of aerosol germanium nanoparticles followed by sintering in a tube furnace at different temperatures varying from 25 to 800 °C. The size, structure, chemical composition and optical properties were studied. We have demonstrated a melting mechanism of nanoparticles agglomerates, the growth of the mean primary particle size from 7 to 51 nm and the reduction of the size of agglomerates with a temperature increase. According to transmission electron microscopy (TEM) and Fourier transform infrared (FTIR) data, primary nanoparticles sintered at temperatures from 25 to 475 °C basically have a structure of Ge crystals embedded in a GeOx amorphous matrix, as well as visible photoluminescence (PL) with the maximum at 550 nm. Pure germanium nanoparticles are prepared at temperatures above 625 °C and distinguished by their absence of visible PL. The shape of the experimental UV-vis-NIR extinction spectra significantly depends on the size distribution of the germanium crystals. This fact was confirmed by simulations according to Mie theory for obtained ensembles of germanium nanoparticles.
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