Researchers at Nanoscience Center of University of Jyväskylä in Finland have succeeded in producing short chains and rings of gold nanoparticles with unprecedented precision. They used a special kind of nanoparticles with a well-defined structure and linked them together with molecular bridges. These structures – being practically huge molecules – allow extremely accurate studies of light–matter interaction in metallic nanostructures and plasmonics. This research was funded by The Academy of Finland.
Nanotechnology gives us tools to fabricate nanometer sized particles where only a few hundred metal atoms form their core. New interesting properties emerge in this scale, for example, the light–matter interaction is extremely strong and catalytic activity increased. These properties have led to several applications, such as, chemical sensors and catalysts.
“Synthesis of nanoparticles usually yields a variety of sizes and shapes”, say lecturer Dr Tanja Lahtinen. The approach we use is exceptional in the sense that after purification we get only a single type of a nanoparticle. These nanoparticles have a specified number of each atom and the atoms are organized as a well-defined structure. It is essentially a single huge molecule with a core of gold. These nanoparticles were linked with molecular bridges forming pairs, chains, and rings of nanoparticles.
“When these kind of nanostructures interact with light, electron clouds of the neighboring metal cores become coupled”, explains researcher Dr Eero Hulkko. The coupling alters significantly the electric field what molecules in between the particles feel.
“Studying nanostructures that are well-defined at the atomic level allows us to combine experimental and computational methods in a seemless way”, continues Dr Lauri Lehtovaara, Research Fellow of the Finnish Academy. We are aiming to understand light–matter interaction in linked metallic nanostructures at the quantum level. Deeper understanding is essential for development of novel plasmonic applications.
The research continues a long-term multidispilinary collaboration at Nanoscience Center of University of Jyväskylä.
“I am very happy that our dedicated efforts on studying monolayer protected clusters and their applications have created an unique multidisiplinary center of excellence which is able to continuously publish high impact science”, says Hannu Häkkinen, an Academy Professor and head of the Nanoscience Center.
In addition to the above persons, Karolina Sokołowska, Dr Tiia-Riikka Tero, Ville Saarnio, Dr Johan Lindgren, and Prof Mika Pettersson contributed to the research. The research was published in the Nanoscale on xx.9.2016. Computational resources were supplied by CSC - IT Center for Science.
For further information, please contact:
Aila Pirinen | AlphaGalileo
Novel mechanisms of action discovered for the skin cancer medication Imiquimod
21.10.2016 | Technische Universität München
Second research flight into zero gravity
21.10.2016 | Universität Zürich
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
21.10.2016 | Health and Medicine
21.10.2016 | Information Technology
21.10.2016 | Materials Sciences