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Abstract Nanodiamonds are very small crystalline materials, only a few nanometers in size; although they have the same crystal structure as diamonds, their properties are quite different from those of ordinary diamonds and synthetic diamonds: compared to tiny volumes, nanometers The influence of diamond surface properties is greater. Aqueous solution...
Nanodiamonds are very small crystalline materials, only a few nanometers in size; although they have the same crystal structure as diamonds, their properties are quite different from those of ordinary diamonds and synthetic diamonds: compared to tiny volumes, nanodiamonds The influence of surface properties is greater. Suspended nanodiamonds in aqueous solutions can act as free carriers for active materials in biomedical applications and are used to decompose water catalysts. Recently, the HZB team from the Research Center of the Helmholtz Association of Germany, under the leadership of Dr. Emad F. Aziz, studied the electronic properties of nanodiamonds deposited on solid substrates and the electronic properties of nanodiamonds in aqueous solutions. This can be studied by applying BESSY II absorption and emission spectra. Their results, published in Nanoscale, mainly explain that nanodiamonds exhibit bid band electron holes in their suspensions, but this phenomenon is not found in their films.
"In water, nanodiamonds interact very strongly with their neighboring molecules and ions," Petit said. The active pharmaceutical ingredient adsorbed on the nanodiamond can be altered by adding salt or changing the pH activity. Petit and his colleagues found that the surface electronic states of nanodiamonds in suspension are significantly different from those of nanodiamonds on solid substrates.
The researchers tested the liquid sample using x-ray spectroscopy under vacuum and plotted detailed valence and band electron fill and missing images. The results show that the surface of the nanodiamond in the suspension will form valence band electron missing holes. This phenomenon indicates that electrons on the surface of the nano-diamond contribute to the surrounding water molecules. Physicists have also begun to suspect that if the electronic structure of nanoparticles is changed, it may affect their chemical, optical and catalytic properties. In the future, they will conduct further research to determine whether the catalytic effect of nanodiamonds in water can be increased to decompose water molecules into oxygen and hydrogen.
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