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Non-destructive imaging on synthesised nano-particles

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DateAccepted/In press - 25 Jan 2021
DatePublished (current) - 29 Jan 2021
Issue number3
Number of pages14
Original languageEnglish


Our recently developed non-destructive imaging technique was applied for the characterisation of nano-particles synthesised by X-ray radiolysis and sol-gel method. The interfacial conditions between the nano-particles and the substrates were observed by subtracting images taken by scanning electron microscopy at controlled electron acceleration voltages to allow backscattered electrons to be generated predominantly below and above the interfaces. The interfacial adhesion was found to be dependent on solution pH used for the particle synthesis or particle suspension preparation, proving the change in the particle formation/deposition processes with pH as anticipated and agreed with the prediction based on the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. We found that our imaging technique was useful for the characterisation of interfaces hidden by nano-particles to reveal the formation/deposition mechanism, and can be extended to the other types of interfaces.

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