Abstract
An overview of recent work on the low-temperature plasma-assisted synthesis of zinc oxide (ZnO) nanoparticles is presented and interpreted in terms of gas-phase and surface reactions with illustrated examples. The thermodynamical nonequilibrium conditions allow the formation of chemically reactive species with a potential energy of several eV, which readily interact with the Zn precursors and initiate reactions leading to the formation of nanoparticles or nanowires. The high-quality nanowires were synthesized from Zn powders only upon interaction with moderately ionized plasma in a narrow range of plasma parameters. This technique is promising for the synthesis of large quantities of nanowires with aspect ratios well above 10, but the exact range of parameters remains to be determined. Apart from the ex situ techniques, the ZnO nanoparticles can be synthesized by depositing a film of precursors (often Zn salts or Zn-containing organometallic compounds) and exposing them to oxygen plasma. This technique is useful for the synthesis of well-adherent ZnO nanoparticles on heat-sensitive objects but requires further scientific validation as it often leads to the formation of a semicontinuous ZnO film rather than nanoparticles. Both low-pressure and atmospheric plasmas are useful in converting the precursor film into ZnO nanoparticles despite completely different mechanisms.
Highlights
Metal oxide nanoparticles have attracted the attention of both the scientific community and users as their properties often differ significantly from those of bulk materials.Perhaps the most studied are titanium dioxide nanoparticles, followed by silica and zinc oxide nanoparticles [1,2]
The plasma reactors operate at low-pressure conditions to is to apply an atmospheric-pressure plasma jet and feed precursors dissolved in small avoid agglomeration of the synthetized zinc oxide (ZnO) nanoparticles
The water evaporates at least partially under the plasma to apply an atmospheric-pressure plasma jet and feed precursors dissolved in small water conditions and the precursor transforms into ZnO nanoparticles
Summary
Metal oxide nanoparticles have attracted the attention of both the scientific community and users as their properties often differ significantly from those of bulk materials. This technique was elaborated by Kylian et al. This technique was elaborated by Kylian et al This technique allows the some ions) pass into the gas phase, where they can agglomerate if the pressure is high synthesis of nanoparticles with selected diameters and compositions, depending on the enough. Zinc atoms are partially excited and ionized, while any metallic clusters, likely by strongbydischarges [7], assume a negative surfacesurface chargecharge due to thetoattachment of formed strong discharges [7], assume a negative due the attachment slow plasma electrons. The kinetics nanoparticle formation using powder as a precursor differ-in gaseous plasmaof was reported by Yang et al [25]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
