Concentration Of Silver Nitrate Solution Research Articles

In Situ Depositing Silver Nanoclusters on Silk Fibroin Fibers Supports by a Novel Biotemplate Redox Technique at Room Temperature

Evolvement of bioinspired approaches for the construction of well-ordered nanostructures is a crucial intersection of branches of materials science and biotechnology. In this paper, floriated clusters of silver nanocrystallites, which consist of polycrystalline grains about 5 nm in diameter, have been successfully prepared on silk fibroin fibers (SFFs) through an in situ biotemplate redox approach at room temperature. The reductive amino acid tyrosine of SFFs mainly provided both reduction and location functions under alkaline conditions and could reduce Ag(I) ions to Ag(0). Finally, stable silver nanoclusters were generated on SFF substrates. The morphologies of silver nanoclusters were mostly attributed to the concentration of silver nitrate solution as well as special configurations and structures of silk fibroin macromolecules. A possible mechanism was explored intensively for tyrosine-residue-based silver nanocrystal formation.

Synthesis of Monodispersed Spherical Single Crystalline Silver Particles by Wet Chemical Process.

Ultrafine silver monodispersed particle were prepared by wet chemical process. To decrease the reduction speed, an important factor in generating monodispersed particles is to control the following three factors: synthesis temperature, concentration of aggregation-relaxing agent added, and concentration of silver nitrate solution. Synthesis of monodispersed spherical Ag particles, used as metal powders for electrode, became possible using the nucleus growth reaction method. This process also allowed the control of the diameter of the powder particles. The silver particles were distributed in a narrow particle diameter range with on average of 0.5μm. Transmission electron microscopy (TEM) revealed that single-crystalline silver particles were prepared by the present method.