NDLI: Synthesis and thermal stability of ZnO nanowires

Content Provider	Springer Nature Link
Author	Awad, Madeha Ahmed Ibrahim, Eslam Mohamed Mohamed Ahmed, Ahmed Mohamed
Copyright Year	2014
Abstract	ZnO nanowires (NWs) were synthesized on Au-coated Si (100) substrates by vapor transport method. The effect of high temperature annealing on the structural and chemical composition as well as thermal stability was studied. The as-prepared ZnO NWs was nearly stoichiometric and identified as hexagonal ZnO phase. After annealing at 1,473 K, the atomic ratio of O/Zn, the intensity of the diffraction peaks, and the diameter of nanowires were increased. The ZnO NWs were fragmented into nanocrystals and the fragments coalesced with each other after annealing at 1,673 K. The thermal stability of ZnO NWs was studied by thermo-gravimetric (TG) analysis. A sharp increase in the TG curves was observed and can be attributed to the oxidation of some possibly presented Zn atoms. The activation energy of oxidation of Zn interstitial atoms was found to be 484.81 kJ mol$^{−1}$. A mass gain peak was observed after annealing at 1,473 K, but it was completely eliminated after annealing at 1,673 K.
Starting Page	635
Ending Page	642
Page Count	8
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	117
Issue Number	2
e-ISSN	15882926
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-05-31
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	ZnO NWs Vapor transport Annealing Thermal stability Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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