Synthesis and spectroscopic characterization of gold nanoparticles via plasma-liquid interaction technique

synthesis and characterization of some macrocyclic schiff bases

ماکروسیکلهای شیف باز از اهمیت زیادی در شیمی آلی و دارویی برخوردار می باشند. این ماکروسیکلها با دارابودن گروه های مناسب در مکانهای مناسب می توانند فلزاتی مثل مس، نیکل و ... را در حفره های خود به دام انداخته، کمپلکسهای پایدار تولید نمایند. در این پایان نامه ابتدا یک دی آلدئید آروماتیک از گلیسیرین تهیه می شود و در مرحله بعدی واکنش با دی آمینهای آروماتیک و یا آلیفاتیک در رقتهای بسیار زیاد منجر به ت...

Synthesis and Characterization of Hydroxyapatite Nanocrystals via Chemical Precipitation Technique

     In this study, hydroxyapatite (HA) nanocrystals have been synthesized via chemical precipitation technique. Diammonium hydrogen phosphate and calcium nitrate 4-hydrate were used as starting materials and sodium hydroxide solution was used as the agent for pH adjustment. The powder sample was evaluated by techniques such as scanning electron microscope, transmission electron microscope, Fou...

Synthesis and Characterization of Gold Nanoparticles

Synthesis and characterization of Janus gold nanoparticles.

A IO N Ligand molecules on monolayer-protected gold nanoparticles (NPs) determine the majority of their surface properties. It has been established that when a binary mixture of dislike ligands forms a self-assembled monolayer either on fl at surfaces [ 1 ] or on a NP, [ 2 ] separation into distinct domains occurs. For gold NPs between ∼ 3 and ∼ 8 nm in diameter, stripe-like domains form. [ 2b ...

Preparation and characterization of CaF2:Ce3+ nanoparticles with spectroscopic studies

In this research Calcium fluoride nanoparticles and its different amount of cerium ion dopant (5%and 10%) were prepared. The mentioned nanoparticle were studied by fourier transform infrared spectroscopy (FTIR) , X-ray diffraction (XRD), absorption and photoluminescence spectra (PL) and Scanning electron microscopy (SEM). The XRD patterns indicate a typical cubic fluorite structure and no other...