Navigation Links
A breakthrough in imaging gold nanoparticles to atomic resolution by electron microscopy
Date:8/22/2014

Nanometre-scale gold particles are intensively investigated for application as catalysts, sensors, drug delivery devices, biological contrast agents and components in photonics and molecular electronics. Gaining knowledge of their atomic-scale structures, fundamental for understanding physical and chemical properties, has been challenging. Now, researchers at Stanford University, USA, have demonstrated that high-resolution electron microscopy can be used to reveal a three-dimensional structure in which all gold atoms are observed. The results are in close agreement with a structure predicted at the University of Jyvskyl, Finland, on the basis of theoretical modelling and infrared spectroscopy (see Figure). The research was published in Science on 22 August 2014.

The revealed gold nanoparticle is 1.1 nm in diameter and contains 68 gold atoms organised in a crystalline fashion at the centre of the particle. The result was supported by small-angle X-ray scattering done in Lawrence Berkeley National Laboratory, USA, and by mass spectrometry done at Hokkaido University, Japan.

Electron microscopy is similar in principle to conventional light microscopy, with the exception that the wavelength of the electron beam used for imaging is close to the spacing of atoms in solid matter, about a tenth of a nanometre, in contrast with the wavelength of visible light, which is hundreds of nanometres. A crucial aspect of the new work is the irradiation of the nanoparticle with very few electrons to avoid perturbing the structure of the nanoparticle. The success of this approach opens the way to the determination of many more nanoparticle structures and to both fundamental understanding and practical applications.

The researchers involved in the work are Maia Azubel, Ai Leen Koh, David Bushnell and Roger D. Kornberg from Stanford University, Sami Malola, Jaakko Koivisto, Mika Pettersson and Hannu Hkkinen from the University of Jyvskyl, Greg L. Hura from Lawrence Berkeley National Laboratory, and Tatsuya Tsukuda and Hironori Tsunoyama from Hokkaido University. The work at the University of Jyvskyl was supported by the Academy of Finland. The computational work in Hannu Hkkinen's group was done at the HLRS-GAUSS centre in Stuttgart as part of the PRACE project "Nano-gold at the bio-interface".


'/>"/>

Contact: Hannu Häkkinen
hannu.hakkinen@jyu.fi
Academy of Finland
Source:Eurekalert  

Related biology technology :

1. NORD Announces Agenda for 2014 Rare Diseases and Orphan Products Breakthrough Summit
2. Unveiling Breakthroughs in Clinical & Cellular Immunology
3. Breakthrough laser experiment reveals liquid-like motion of atoms in an ultra-cold cluster
4. Technion Breakthrough Opens New Avenues In Search For Alzheimers Cure
5. Science Magazine: Cancer Immunotherapy is the Medical Breakthrough of 2013; The CBCD Highlights the Link between Immunotherapy and Microcompetition
6. Organic mega flow battery promises breakthrough for renewable energy
7. Telomere Biosciences Announces: TELO-100 with T-Activator 150, a Breakthrough in Telomere Science and Age Management
8. Important breakthrough in identifying effect of epilepsy treatment
9. QB3 and JPMorgan Chase Announce Breakthrough Collaboration
10. Breakthrough in study of aluminum should yield new technological advances
11. Researchers discover breakthrough technique that could make electronics smaller and better
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A breakthrough in imaging gold nanoparticles to atomic resolution by electron microscopy
(Date:7/20/2017)... ... 2017 , ... Corporate Directors Forum is recognizing six San Diego directors for ... Awards. , The awards will be presented Thursday, September 7th, from 6 to 9 ... have made significantly positive contributions in the boardrooms of some of our region’s most ...
(Date:7/18/2017)... ... July 18, 2017 , ... G-CON today announced that ... Office for its Patent Applications 14/858,857 and 13/669,785 both entitled Modular, Self-Contained, Mobile ... further expand the protection of G-CON’s R&D investments and validate the G-CON platform ...
(Date:7/17/2017)... ... 17, 2017 , ... The Academy of Model Aeronautics (AMA) will host Aviation ... will take place from 9 a.m. to 2 p.m. at the International Aeromodeling Center ... , Aviation Adventure Day will be packed with entertaining activities for the entire family. ...
(Date:7/17/2017)... Salt Lake City, Utah (PRWEB) , ... July ... ... the “Company”), a molecular diagnostics company that has developed and intends both to ... offering and started trading on the NASDAQ Capital Market. , Headquartered in Sandy, ...
Breaking Biology Technology:
(Date:3/24/2017)... Research and Markets has announced the addition ... Trends - Industry Forecast to 2025" report to their offering. ... The Global Biometric ... of around 15.1% over the next decade to reach approximately $1,580 ... market estimates and forecasts for all the given segments on global ...
(Date:3/23/2017)... 2017 Research and Markets has announced the ... Trends - Industry Forecast to 2025" report to their offering. ... The Global ... of around 8.8% over the next decade to reach approximately $14.21 ... market estimates and forecasts for all the given segments on global ...
(Date:3/22/2017)... Optimove , provider of the ... as 1-800-Flowers and AdoreMe, today announced two new ... Using Optimove,s machine learning algorithms, these features allow ... recommendations to their customers based not just on ... intent drawn from a complex web of data ...
Breaking Biology News(10 mins):