Navigation Links
Molecular sudoku
Date:10/5/2011

As reported this week in Nature Communications, the researchers used the atomically-sharp tip of a scanning tunneling microscope to move 1-nanometer sized molecules on top of a silver substrate. The tip is controlled with such great accuracy that it is possible to precisely choose the position of each molecule and build tiny molecular squares, crosses, and chains of controlled size and orientation. The same tip is then used as a mobile electrode to probe the electrical conductivity of the molecules as a function of their position in the array. Figures a-d show an example of such measurements: a represent the topography of a "sudoku" molecular cluster, whereas b-d show regions of high conductivity at different voltages. At low voltage, electrons prefer to pass through the corner molecules, whereas at high voltage, only the central molecule is conducting. This is so because the conductivity depends strongly on a small set of electronic states, which conduct electricity to the substrate, and these are modified by the presence of side-to-side neighbors.

The molecular conductance was found to vary strongly not only from one molecule to another, but also within each molecule, due to the possibility of exploiting different electron transport channels at different positions. Such conduction channels arise from the excitation of internal degrees of freedom of the molecules, such as atomic vibrations and magnetic coupling of the electronic spins. All together, these results demonstrate the intricacy and beauty of molecular electronics, providing a glimpse of its advantages, such as the fabrication of versatile miniaturized circuits, and challenges, which may prove harder to solve than a sudoku game.


'/>"/>

Contact: Pietro Gambardella
pietro.gambardella@icn.cat
Institut Catal de Nanotecnologia
Source:Eurekalert

Page: 1

Related biology news :

1. Structure of a molecular copy machine
2. Pitt team finds molecular evidence of brain changes in depressed females
3. First field-based molecular diagnostic test for African sleeping sickness in sight
4. Molecular chaperones traffic signaling proteins between cells in plant stem-cell maintenance pathway
5. Penn molecular scientists develop color-changing stress sensor
6. Carnegie Mellon scientists discover how molecular motors go into energy save mode
7. Pitt team finds molecular pathway that leads to inflammation in asthma
8. Handbook of Molecular Microbial Ecology: Exploring the World of the Microbes
9. RUB researchers decipher the molecular basis of blue-green algae
10. Common drugs initiate a molecular pas de quatre at the surface of the cell membrane
11. Breaking the chain: Molecular cap blocks processes that lead to Alzheimers, HIV
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/30/2017)... March 30, 2017  On April 6-7, 2017, Sequencing.com ... Genome hackathon at Microsoft,s headquarters in ... will focus on developing health and wellness apps that ... Hack the Genome is the first hackathon for ... world,s largest companies in the genomics, tech and health ...
(Date:3/28/2017)... , March 28, 2017 ... Biometrics), Hardware (Camera, Monitors, Servers, Storage Devices), Software (Video ... and Region - Global Forecast to 2022", published by ... in 2016 and is projected to reach USD 75.64 ... 2017 and 2022. The base year considered for the ...
(Date:3/23/2017)... 23, 2017 The report "Gesture Recognition and Touchless Sensing ... Geography - Global Forecast to 2022", published by MarketsandMarkets, the market is expected ... 29.63% between 2017 and 2022. Continue Reading ... ... ...
Breaking Biology News(10 mins):
(Date:8/15/2017)... (PRWEB) , ... August 15, 2017 , ... ... encrypted shopping cart. Now mobile responsive, the new website makes it easy to ... anywhere in between. Users can now find detailed product information, educational industry content ...
(Date:8/14/2017)... New York, NY (PRWEB) , ... August 14, 2017 , ... ... Mobile in Clinical Trials event, which will take place on September 6, 2017 ... Daniel Karlin, MD , Head of Experimental Medicine, Informatics, and Regulatory Strategy, Pfizer ...
(Date:8/11/2017)... ... 2017 , ... Algenist continues to disrupt the skincare industry with today’s debut ... , Collagen is the key structural element skin needs to maintain its youthful appearance ... First to market with proprietary collagen water active , ...
(Date:8/10/2017)... ... August 09, 2017 , ... ... next week-- as students. From August 14th through the 16th, the University City ... debuted in the summer of 2016, provides Philadelphia-based middle school educators an opportunity ...
Breaking Biology Technology: