| 摘要 |
<p>Purification of nanoparticles from the unreacted species and size-based separation of nanoparticles is often a difficult task. The currently used methods for purification of nanoparticles rely upon costly and hazardous chemicals such as acids, alkalis, etc. (for dissolution of unwanted by-products), costly equipment such as ultracentrifuges, ultra/nano-filtration cassettes and chemical agents such as PEG for the concentration of nanoparticles. These methods are costly and chemicals may pose toxicity problems. The longer time and labor involved in the purification of nanoparticles is a major limitation of existing methodology and restricts large scale production of nanoparticles. The present invention describes a multi phase system for phase separation and formation of separate layers, wherein the nanoparticles are lodged in the intermediate layer sandwiched between these two layers.</p> |
