Navigation Links
Flexible tapes from the nanoworld
Date:8/13/2014

Porphyrin molecules are essential to many biological processes, such as photosynthesis and respiration. Dr. Wilhelm Auwrter's group is investigating these all-round talents at TU Mnchen.

Normally, hydrogen attaches to the outer edges of the porphyrin core named porphine, but other chemical entities can take the place of hydrogen, thereby changing the properties of the molecules.

Alissa Wiengarten, PhD student at the TUM Department of Physics, heats a porphine powder in a vacuum chamber. In the process, individual porphine molecules leave the collective and adhere to a silver surface, where they react with each other and assemble into small groups all by themselves. Single molecules can desorb from the hot surface, while chains of two, three or more porphine units cannot. In this way the scientists were able to assemble chains of up to 90 porphine units.

Thorough analysis

Using a surface made of silver is essential to the experiment: "Silver seems to be a kind of catalyst for the reaction", Wilhelm Auwrter explains. "Still, we don't fully understand why this is the case."

Aside from fundamental questions, Auwrter's group also hopes to find a way to generate ordered long molecular porphin chains, so-called tapes. Only one molecule wide, such structures could serve as optically active elements in electronic applications or data storage.

In order to investigate these tiny structures on the silver surface, Auwrter's team uses a whole range of sophisticated structure analysis techniques available at TUM and through cooperation with international partners.

Fascinating images of the molecular structures, for example, were captured using a scanning tunneling microscope at TUM. The team also conducted spectroscopy analyses using synchrotron radiation of the ELETTRA storage ring in Trieste, which provided important insights into the electronic structure of the porphine groups.


'/>"/>

Contact: Stefanie Reiffert
reiffert@zv.tum.de
Technische Universitaet Muenchen
Source:Eurekalert

Page: 1

Related biology news :

1. Researchers create flexible, nanoscale bed of nails for possible drug delivery
2. Inspired by deep sea sponges: Creating flexible minerals
3. Stanford engineers monitor heart health using paper-thin flexible skin
4. No compromises: JILAs short, flexible, reusable AFM probe
5. Flexible supercapacitor raises bar for volumetric energy density
6. UT Dallas team creates flexible electronics that change shape inside body
7. For corals adapting to climate change, its survival of the fattest -- and most flexible
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/6/2016)... -- Valencell , the leading innovator in performance ... third consecutive year of triple digit growth for its ... a 360 percent increase in companies who have acquired ... by sales of its wrist and ear Benchmark™ sensor ... for hearables for fitness and healthcare applications. ...
(Date:12/2/2016)... 2016 The report "Biometric Vehicle ... Technology (Iris Recognition System), Vehicle Type (Passenger Car, ... to 2021", published by MarketsandMarkets, the market is ... and is projected to grow to USD 854.8 ...      (Logo: http://photos.prnewswire.com/prnh/20160303/792302) ...
(Date:11/30/2016)... , Nov. 30, 2016  higi SH llc ... partnership initiative targeting national brands, industry thought-leaders and ... their respective audiences for taking steps to live ... inception in 2012, higi has built the largest ... over 38 million people who have conducted over ...
Breaking Biology News(10 mins):
(Date:12/8/2016)... ... December 08, 2016 , ... KBioBox llc announced today the ... KbioBox developed a sophisticated “3 click” gene dditing off target analysis program and ... website, https://www.kbiobox.com/ and powered by the company’s proprietary BioEngine. Scientists, ...
(Date:12/8/2016)... (PRWEB) , ... December 08, 2016 , ... This CAST ... approvals for biotech crops. The authors focus on the economic effects in countries that ... approval of new biotech crops and the resultant risk of low level presence (LLP) ...
(Date:12/8/2016)... , Dec. 8, 2016  HedgePath Pharmaceuticals, ... that discovers, develops and plans to commercialize innovative ... shares of common stock were approved for trading ... begin trading on the OTCQX, effective today, under ... for the OTCQX market, companies must meet high ...
(Date:12/8/2016)... , Dec. 8, 2016  Partnering to fuel ... Ben Franklin Technology Partners of Southeastern Pennsylvania ... ("IHG"), the parent company of Independence Blue Cross; and ... announced their intentions for a $6 million funding initiative ... healthcare startups. Responding to a burgeoning economic ...
Breaking Biology Technology: