26 juin 2019

[Nanotechnology] – Decorating iron nanocubes with gold increases their functionality

Accueil / Actualités / [Nanotechnology] – Decorating iron nanocubes with gold increases their functionality
Flèche contenu

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.

ybrid Au/Fe nanoparticles can grow in an unprecedentedly complex structure with a single-step fabrication method

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

Découvrez aussi
[Nonotechnology] – Using In Situ Liquid TEM to Characterize the Size, Shape and Composition of Nanomaterials 12 novembre 2019

Nanoparticle-based materials are frequently utilized in a variety of applications such as drug delivery, energy production, and catalysis. The shape, composition, and size of nanoparticles has a significant influence on their performance, so producing controllable manufacturing systems is crucial to the commercialization of the latest nanomaterials.

Lire la suite
[Nanotechnology] – How do atoms vibrate in graphene nanostructures? 13 août 2019

In order to understand advanced materials like graphene nanostructures and optimize them for devices in nano-, opto- and quantum-technology it is crucial to understand how phonons – the vibration of atoms in solids – influence the materials’ properties.

Lire la suite