Transmission electron microscopy Ag2S nanoparticles

Ag2S was also effectively stabilized by cysteinyl ligands. These clusters are synthesized using a molar ratio of 2 1 cysteine silver ions upon which stoichiometric amounts of inorganic sulfide were added to nucleate the nanoparticle, with subsequent size-selective precipitation. The resultant nanoparticles had an absorbance shoulder at 300 nm. Further analysis using high-resolution transmission electron microscopy (HRTEM) revealed a particle size of approximately 9.00 2.25 run in diameter. Selected area electron diffraction (SAED) analysis also demonstrates the highly crystalline natme of the product. ... 

The HRE peptide was shown to minerahze a total of seven nanoclusters, ZnS, Au , Ag°, Pt°, Cu , Ti02, and Ag2S. All nanoparticles were formed by mixing appropriate ratios of metal to peptide to form a metal peptide precursor complex. To this solution, sulfide or reductant was added to form the appropriate encapsulated metal nanocluster. Condensation of titanium isopropoxide in the presence of HRE was used for synthesis of Ti02-(HRE) nanoparticles. Once formed, all of the nanoclusters were characterized using UV-vis, IR, powder XRD, transmission electron microscopy, and an antigen capture assay,... 

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