One of the major challenges in nanotechnology is the precise control of shape, size and elemental composition of every single nanoparticle. Physical methods are able to produce homogeneous nanoparticles free of surface contamination. However, they offer limited opportunity to control the shape and specific composition of the nano-objects when they are being built up.
A recent collaboration between the University of Helsinki and the Okinawa Institute of Science and Technology (OIST) Graduate University revealed that hybrid Au/Fe nanoparticles can grow in an unprecedentedly complex structure with a single-step fabrication method.
Using a computational modelling framework, the groups of Professor Flyura Djurabekova at the University of Helsinki and Prof. Sowwan at OIST succeeded in deciphering the growth mechanism by a detailed multistage model.
legantly combined considerations of kinetic and thermodynamic effects explained the formation of embedded gold layers and the site-specific surface gold decoration. These results open up a possibility for engineering a multitude of hybrid nanoparticles for a wide range of emerging applications.
Their research was recently published in the open access journal Advanced Science (« Site-Specific Wetting of Iron Nanocubes by Gold Atoms in Gas-Phase Synthesis »).
“When nature surprises us with an unexpectedly beautiful pattern, we must recognize it and explain. This is the way to cooperate with nature that is always ready to teach and expecting us to learn,” says Dr. Junlei Zhao, a postdoctoral researcher in the group of Prof. Djurabekova.
Nowadays, scientists are able to study nano-scale phenomena with great accuracy by using high-performance computational software and modern supercomputing infrastructures. These are of great support, not only for advancing fundamental science but also for finding promising solutions for many challenges of humanity.
Source: University of Helsinki
Around 185 m2 of Heliatek’s OPV films have been installed on a warehouse of inland port Duisburger Hafen.
With a total length of almost 600m, the largest organic photovoltaic façade installation so far has been installed in Germany using Heliatek’s HeliaSol film panels.
Researchers have developed an inexpensive way to make products incorporating nanoparticles — such as high-performance energy devices or sophisticated diagnostic tests — which could speed the commercial development of devices, materials and technologies.Lire la suite