Homogenous alloy nanoparticles with Ag80-Au20 composition of Ag–Au alloy nanoparticles having a thin metal-oxide shell on the metallic alloy core of average size of 12 ± 2 nm were successfully prepared by the exploding wire technique comprising of a wire–plate system and using 12 V batteries by scientists of University of Delhi and National Physical Laboratory during 2007.

Satoshi Seino and others of japan have developed during 2007 a composite nanoparticles consisting of gold and iron oxide were synthesized in aqueous solution systems by using a high-energy electron beam. The electron irradiation induces radiation-chemical reaction to form metallic gold nanoparticles. These gold nanoparticles were firmly immobilized on the surface of the support iron oxide nanoparticles. Surface of the support iron oxide nanoparticles are almost fully coated with fine gold nanoparticles. The size of these gold nanoparticles depended on the concentrations of gold ions, polymers and iron oxide nanoparticles in the solutions before the irradiation.

Reduction of silver myristate (AgMy) under mild thermal reaction conditions in a dipolar aprotic solvent i.e. N, N-dimethylformamide (DMF) has resulted in silver nanoparticles crystallite size of about 10 nm according to Khanna and other scientists of Nanoscience Group, Centre for Materials for Electronics Technology (C-MET) india as reported during 2008.

An innovative microfluidic reactor concept for the production of high quality semiconductor nanocrystals has been developed by Jeffrey D Winterton of University of California and reported during 2008.

Nanomanufacturing in microfluidic reactor

To perform specific nanocrystal synthesis operations a droplet-based, two phase flow type reactor with flow channels has been developed. The flow channels are arranged to spiral in and out of novel reaction coin structures that are designed to allow the thermal profile of the reactor to be tailored to the requirements of specific nanocrystal synthesis operations.