Silver metallic nanoparticles

Kryukov A. L, Zinchuk N. N., Korzhak A. V. The Influence of Conditions of Catalytic Synthesis of Metallic Silver Nanoparticles on Their Plasmon Resonance, Theoret. i Experiment. Khimiya ". 2003, 39, Jf 1, 8-13 (in Russian). 

Most the nanomaterials contain several antimicrobial properties and presently researchers are focused toward unraveling the pharmaceutical difficulties using these nanomaterials. Compared to other metals, silver nanoparticles play one of the most important roles in antimicrobial activity both extra- and intracellularly. After long... 

Recently, Shimizu and co-workers studied silver-doped ceria and found that metallic silver nanoparticles are predominantly formed on ceria. These enhance the reducibility of ceria with a beneficial effect on catalytic activity. The effect of the preparation and the deposition method of Ag was shown also to positively influence catalytic activity. The development of novel preparation methods was also the focus of the study by Kayama et who investigated a... 

In Section 2 the general features of the electronic structure of supported metal nanoparticles are reviewed from both experimental and theoretical point of view. Section 3 gives an introduction to sample preparation. In Section 4 the size-dependent electronic properties of silver nanoparticles are presented as an illustrative example, while in Section 5 correlation is sought between the electronic structure and the catalytic properties of gold nanoparticles, with special emphasis on substrate-related issues. 

Remarkably the position of the final plasmon peak of the alloy particles is dependent on the molar ratio of gold to silver nanoparticles. When the ratio is shifted favoring either metal, an alloy of any desired composition can be formed. This alloying phenomenon indicates that it is possible for true tuneability of the properties of a set of nanoparticles. 

Thus, silver nanoparticles grow gradually during UV light irradiation (processes al-a3 in Figure 2). Nanoparticles of other noble metals such as gold, copper, platinum, and palladium can also be deposited by this method. 

Table 2. Metal content and average diameter of silver nanoparticles CmAgNP/N(Cn)3S.

Pioneering studies by Gardea-Torresdey et al. [28,29] reported for the first time the formation of gold and silver nanoparticles by living plants. Their study demonstrated that alfalfa plants can form gold and silver nanoparticles. Furthermore, these researchers reported that nucleation/ growth of the metallic nanoparticles took place inside the plants. This study opened new and exciting ways to synthesize metallic nanoparticles [30,31]. 

Alqudami, A. and Annapoorni, S. (2007) Fluorescence from metallic silver and iron nanoparticles prepared by exploding wire technique. Plasmonics, 2, 5-13. 

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