New breakthrough for structural characterization of metal nanoparticles

Sep 04, 2013
New breakthrough for structural characterization of metal nanoparticles
Credit: hakkinen1

Researchers at the Xiamen University in China and the University of Jyväskylä in Finland have characterized a series of stable 1.5 nm metal nanoclusters containing 44 metal atoms, stabilized by 30 organic thiol molecules on the surface. Two types of clusters were synthesized, containing either 44 silver atoms or an intermetallic cluster of 12 gold and 32 silver atoms. The work in the University of Jyväskylä is funded by the Academy of Finland.

The special electronic structure of the clusters leads to peaked absorption of radiation in a wide region of ultraviolet and visible parts of the . These novel were synthesized first in 2009 by a group at MIT in the USA, but their atomic structure has not been known until now. This is the first case of a very stable silver-based cluster nanomaterial that can be synthesized in a , currently of the order of 10 grams from one synthesis. This material is expected to be widely studied for optical, sensing and electron-transfer applications in the future. The results were reported online in Nature Communications on 4 September 2013.

The experimental work was done in Xiamen by the group of Professor Nanfeng Zheng and the computational work by the group of Professor Hannu Häkkinen in the University of Jyväskylä. The other researchers involved were Huayang Yang, Yu Wang and Huaqi Huang in Xiamen University and Lars Gell, Sami Malola and Lauri Lehtovaara in the University of Jyväskylä. The computations were made at the CSC – IT Centre for Science in Espoo, Finland, and at the HRLS-GAUSS Centre in Stuttgart, Germany.

Explore further: Thinnest feasible nano-membrane produced

More information: Yang, H. et al. All-thiol stabilized Ag44 and Au12Ag32 nanoparticles with single-crystal structures, Nature Communications, 4 September 2013. DOI: 10.1038/ncomms3422.

add to favorites email to friend print save as pdf

Related Stories

Charge separation in silver clusters

Aug 09, 2012

Center for Nanoscale Materials (CNM) users from the Ecole Polytechnique Federale de Lausanne in Switzerland, working with the Argonne National Laboratory's CNM Nanophotonics Group, have demonstrated the existence of long-lived char ...

Fingerprints of a gold cluster revealed

Feb 28, 2011

Nanometre-scale gold particles are currently intensively investigated for possible applications in catalysis, sensing, photonics, biolabelling, drug carriers and molecular electronics. The particles are prepared ...

Oxidation mechanisms at gold nanoclusters unraveled

Oct 08, 2010

Researchers believe that the puzzle of catalytic gold is now partially solved. Gold can catalyse an oxidation reaction by first oxidising itself. New research evidence on gold-oxide phase at room temperature ...

Two problems in chemical catalysis solved

Dec 20, 2012

The research group of Professor Petri Pihko at the Department of Chemistry and the NanoScience Center of the University of Jyväskylä has solved two acute problems in chemical catalysis. The research has ...

Recommended for you

Thinnest feasible nano-membrane produced

Apr 17, 2014

A new nano-membrane made out of the 'super material' graphene is extremely light and breathable. Not only can this open the door to a new generation of functional waterproof clothing, but also to ultra-rapid filtration. The ...

Wiring up carbon-based electronics

Apr 17, 2014

Carbon-based nanostructures such as nanotubes, graphene sheets, and nanoribbons are unique building blocks showing versatile nanomechanical and nanoelectronic properties. These materials which are ordered ...

Making 'bucky-balls' in spin-out's sights

Apr 16, 2014

(Phys.org) —A new Oxford spin-out firm is targeting the difficult challenge of manufacturing fullerenes, known as 'bucky-balls' because of their spherical shape, a type of carbon nanomaterial which, like ...

User comments : 0

More news stories

'Exotic' material is like a switch when super thin

(Phys.org) —Ever-shrinking electronic devices could get down to atomic dimensions with the help of transition metal oxides, a class of materials that seems to have it all: superconductivity, magnetoresistance ...

Airbnb rental site raises $450 mn

Online lodging listings website Airbnb inked a $450 million funding deal with investors led by TPG, a source close to the matter said Friday.

Health care site flagged in Heartbleed review

People with accounts on the enrollment website for President Barack Obama's signature health care law are being told to change their passwords following an administration-wide review of the government's vulnerability to the ...