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A facile synthesis of silver- and platinum-ethylcellulose nanocomposite films by thermal reduction
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DOI：10.1007/s00289-026-06607-y.png)
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Abstract
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Cellulose is the most abundant natural polymer on earth. However, it is not only insoluble in water but also insoluble in commonly used organic solvents. For this reason, its water-soluble derivatives such as methylcellulose, carboxymethyl cellulose, etc., are often used for various purposes. Ethylcellulose is another kind of derivative which has low solubility in water but very high gas permeability among natural polymers. Accordingly, it has a potential for sensing applications. The facile in-situ synthesis of silver and platinum nanoparticles in ethylcellulose films with a thickness of only ~35 nm is demonstrated through thermal reduction without any additional reducing agent. The in-situ formation of metal nanoparticles in ethylcellulose films is confirmed through the UV-vis spectra, SEM images, energy dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) measurements. As expected, the average size and size distribution of Ag and Pt nanoparticles depend on the temperature and time of thermal annealing. Higher temperature or longer time for thermal annealing results in a broader size distribution of nanoparticles.
Keywords:
In-situ synthesis
Ethylcellulose
Nanocomposite
Silver nanoparticles
Platinum nanoparticles
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