Navigation Links
Nanoparticles and their orbital positions
Date:12/16/2013

Physicists have developed a "planet-satellite model" to precisely connect and arrange nanoparticles in three-dimensional structures. Inspired by the photosystems of plants and algae, these artificial nanoassemblies might in the future serve to collect and convert energy.

If the scientists' nanoparticles were a million times larger, the laboratory would look like an arts and crafts room at Christmas time: gold, silver and colorful shiny spheres in different sizes and filaments in various lengths. For at the center of the nanoscale "planet-satellite model" there is a gold particle which is orbited by other nanoparticles made of silver, cadmium selenide or organic dyes.

As if by magic, cleverly designed DNA strands connect the satellites with the central planet in a very precise manner. The technique behind this, called "DNA origami", is a specialty of physics professor Tim Liedl (LMU Munich) and his team. Together with the group of Professor Jochen Feldmann (also LMU Munich) they introduced and analyzed this novel assembly scheme. Both groups are part of the cluster of excellence Nanosystems Initiative Munich (NIM).

Large or small, near or far

A distinctive feature of the new method is the modular assembly system which allows the scientists to modify all aspects of the structure very easily and in a controlled manner: the size of the central nanoparticle, the types and sizes of the "satellites" and the distance between planet and satellite particle. The approach also enables the physicists to adapt and optimize their system for other purposes.

Photonic systems

Metals, semiconductors or fluorescent organic molecules serve as satellites. Thus, like the antenna molecules in natural photosystems, such satellite elements might in future be organized to collect light energy and transfer it to a catalytic reaction center where it is converted into another form of energy. For the time being, however, the model allows the scientists to investigate basic physical effects such as the so-called quenching process, which refers to the changing fluorescence intensity of a dye molecule as a function of the distance to the central gold nanoparticle.

"The modular assembly principle and the high yield we obtained in the production of the planet-satellite systems were the crucial factors for reliably investigating this well-known effect with the new methods," explains Robert Schreiber, lead author of the study.

A whole new cosmos

In addition, the scientists succeeded in joining individual planet-satellite units together into larger arrays, while maintaining the combinatorial freedom. This way, it might be possible to develop complex and functional three-dimensional nanosystems, which could be used as Raman spectroscopy platforms, as plasmonic energy funnels or as nanoporous materials for catalytic applications.


'/>"/>

Contact: Luise Dirscherl
dirscherl@lmu.de
49-892-180-2706
Ludwig-Maximilians-Universitt Mnchen
Source:Eurekalert

Related biology technology :

1. Marshall study shows nanoparticles used as additives in diesel fuels can travel from lungs to liver
2. Metal nanoparticles shine with customizable color
3. New measuring techniques can improve efficiency, safety of nanoparticles
4. Light touch keeps a grip on delicate nanoparticles
5. Nanoparticles seen as artificial atoms
6. Nanoparticles found in moon glass bubbles explain weird lunar soil behavior
7. Study improves understanding of surface molecules in controlling size of gold nanoparticles
8. Gold nanoparticles could treat prostate cancer with fewer side effects than chemotherapy
9. New structural information on functionalization of gold nanoparticles
10. New imaging technique homes in on electrocatalysis of nanoparticles
11. Lung mucus gel scaffold prevents nanoparticles from getting through
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/23/2016)... -- The Prostate Cancer Foundation (PCF) is pleased to announce 24 new ... prostate cancer. Members of the Class of 2016 were selected from a pool ... Read More About the Class of 2016 PCF Young Investigators ... ... ...
(Date:6/23/2016)... ... June 23, 2016 , ... Supplyframe, the Industry ... Supplyframe Design Lab . Located in Pasadena, Calif., the Design Lab’s mission ... hardware projects are designed, built and brought to market. , The Design Lab ...
(Date:6/23/2016)... LOUISVILLE, Ky. , June 23, 2016 /PRNewswire/ ... from two Phase 1 clinical trials of its ... double-blind, placebo-controlled, single and multiple ascending dose studies ... and pharmacodynamics (PD) of subcutaneous injection in healthy ... APL-2 subcutaneously (SC) either as a single dose ...
(Date:6/23/2016)... 23, 2016 On Wednesday, June 22, ... down 0.22%; the Dow Jones Industrial Average edged 0.27% lower ... 2,085.45, down 0.17%. Stock-Callers.com has initiated coverage on the following ... Therapeutics (NASDAQ: NKTR ), Aralez Pharmaceuticals Inc. (NASDAQ: ... BIND ). Learn more about these stocks by accessing ...
Breaking Biology Technology:
(Date:4/28/2016)... , April 28, 2016 Infosys ... (NYSE: INFY ), and Samsung SDS, a global ... that will provide end customers with a more secure, fast ...      (Logo: http://photos.prnewswire.com/prnh/20130122/589162 ) , ... but it also plays a fundamental part in enabling and ...
(Date:4/26/2016)... Research and Markets has announced ... 2016-2020"  report to their offering.  , ,     (Logo: ... analysts forecast the global multimodal biometrics market to ... period 2016-2020.  Multimodal biometrics is being ... the healthcare, BFSI, transportation, automotive, and government for ...
(Date:4/15/2016)... 15, 2016 Research and ... Biometrics Market 2016-2020,"  report to their offering.  , ... , ,The global gait biometrics market is expected ... the period 2016-2020. Gait analysis generates ... be used to compute factors that are not ...
Breaking Biology News(10 mins):