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Biomechanical Nanoswitches Open Door to Green Bioelectronics - Researchers realized the first multi-step switching process by STM manipulation on a single molecule. Instead of small organic molecules they used a large plant molecule which is environmentally friendly and abundant in nature.
Biomechanical Nanoswitches Open Door to Green Bioelectronics

 

PRZOOM - /newswire/ - Honolulu, HI, United States, 2006/09/18 - Researchers realized the first multi-step switching process by STM manipulation on a single molecule. Instead of small organic molecules they used a large plant molecule which is environmentally friendly and abundant in nature..

   
 
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The ability to generate functional nanoswitches might ultimately allow the integration of nano-components into electronic components. Single molecule switches using scanning tunneling microscope (STM) manipulation have been demonstrated before. Mostly these switches are based on single atoms or small molecules and operate between two distinct states. Researchers now realized the first multi-step switching process by STM manipulation on a single molecule. Instead of small organic molecules they used a large plant molecule which is environmentally friendly and abundant in nature.

Dr. Saw-Wai Hla and graduate student Violeta Iancu from Ohio University have transformed a molecule of chlorophyll-a into a complex biological switch. Chlorophyll-a is a central molecule in photosynthesis – a process that converts sun light into chemical energy in plant leaves. The conformation changes of this molecule play a vital role in the photosynthesis process.

The scientists used a scanning tunneling microscope to image chlorophyll-a and then injected it with a single electron to manipulate the molecule into four positions, ranging from straight to curved, at varying speeds. Though the Ohio University team and others have created two-step molecule switches using scanning tunneling microscope manipulation in the past, the new experiment yields a more complex multi-step switch on the largest organic molecule to date.

Read the full article on the Nanowerk website.

About Nanowerk
Nanowerk is a leading nanotechnology information portal. Apart from its unique Nanomaterial Database™, with over 1,300 products from 90 suppliers, it provides the most complete nanotech events calendar; hundreds of links to universities, labs, researchers, associations, networks and international initiatives involved in nanotechnology; daily news; downloadable reports; and much more. The site includes a daily “Spotlight” section featuring Nanowerk-exclusive reviews and summaries of cutting-edge nanotechnology research by guest authors and Nanowerk editors. Nanowerk also publishes the nanoRISK newsletter – a constructive contribution to the debate about the potential risks of nanotechnology.

By Michael Berger, Copyright 2006 Nanowerk LLC

 
 
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Biomechanical Nanoswitches Open Door to Green Bioelectronics

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