Navigation Links
Walking molecule now carries packages

A research team, led by UC Riverside's Ludwig Bartels, was the first to design a molecule that can move in a straight line on a flat surface. Now this team has found a way to attach cargo: two CO2 molecules, making the nano-walker a molecule carrier.

The work will be published Thursday, Jan. 18 in "Science Express" and later in the print-version of the journal "Science."

"This is an unprecedented step forward towards the realization of molecular-scale machinery," said Bartels, associate professor of chemistry and a member of UCR's Center for Nanoscale Science and Engineering. "Our experiments show a means to transport molecules reliably. This will become as important to the molecular machinery of the future as trucks and conveyor belts are for factories of today."

The last paper Bartels and his team published on this subject generated a great deal of interest. It was included in the American Institute of Physics "Top 25 Physics Stories for 2005." The new molecule carrier runs on a copper surface. It can pick up and release up to two carbon dioxide (CO2) molecules and carry them along its straight path.

"Carrying a load slows the molecule down" explained Bartels. "Attachment of one CO2 molecule makes the carrier need twice as much energy for a step, and a carrier with two CO2s requires roughly three times the energy. This is not unlike a human being carrying heavy loads in one or both hands." Bartels explained that using machines at the scale of single molecules will ultimate be the most efficient way to build objects or to deliver material.

"It resembles the way nature does it: the molecule carrier transports carbon dioxide across a surface," he said. "In the human body, the molecule hemoglobin carries oxygen from and carbon dioxide to the lungs, thereby allowing us to breathe ?and to live."

Bartels cautions, however, that this research is still in its infancy. "In 2005 we invented the molecular walker, whi ch moves in a straight line rather than hopping around in all directions as a normal molecule would do. Now it can carry a load."

Bartels said the continuing evolutionary process will take some time.

"Ten years ago, a cell phone could just place calls, nothing else. Now it plays mp3-files, organizes your day, lets you send emails and browse the web." He said his team will be pursuing the next step for this molecule carrier. "Next, we would like to be able to make one go around corners, rotate its cargo or send out photons to tell us where it is."

The molecule carrier is anthraquinone, which consists of three fused benzene rings with one oxygen atom on each side. An organic compound, anthraquinone is widely used in the pulp industry for turning cellulose from wood into paper. It is also the parent substance of a large class of dyes and pigments. Its chemical formula is C14H8O2.

The UCR study used a scanning tunneling microscope in Bartels's laboratory that gives a precise picture of individual molecules. Experiments took place on a highly polished copper surface, cleaned so that only the desired molecules were present on it. An individual anthraquinone molecule appears in Bartels' microscope as an almost rectangular feature with slightly rounded edges.


'"/>

Source:University of California - Riverside


Related biology news :

1. Walking not enough for significant exercise benefits
2. Chemists create Superbowl molecule; May lead to better health
3. Key molecule in plant photo-protection identified
4. Inflammatory molecules released by pollen trigger allergies
5. Researchers discover molecule that causes secondary stroke
6. Yale researchers identify molecule for detecting parasitic infection in humans
7. Scientists identify molecule that regulates well-known tumor suppressor
8. Medical molecules designed to respond to visible light that can penetrate tissue
9. Researchers find promising cancer-fighting power of synthetic cell-signaling molecule
10. Chemists synthesize molecule that helps body battle cancers, malaria
11. DNA constraints control structure of attached macromolecules
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/15/2016)... York , March 15, 2016 ... market report published by Transparency Market Research "Digital Door Lock ... and Forecast 2015 - 2023," the global digital door lock ... 731.9 Mn in 2014 and is forecast to grow at ... Growth of micro, small and medium enterprises (MSMEs) across the ...
(Date:3/11/2016)... http://www.apimages.com ) - --> http://www.apimages.com ) - ... ( http://www.apimages.com ) - Germany . The ... refugee identity cards. DERMALOG will be unveiling this device, and a ... next week.   --> Germany . ... new refugee identity cards. DERMALOG will be unveiling this device, and ...
(Date:3/9/2016)... YORK , March 9, 2016 This ... and future states of the RNA Sequencing (RNA Seq) ... segments such as instruments, tools and reagents, data analysis, ... Analyze various segments of the RNA-Sequencing market such as ... services Identify the main factors affecting each segment and ...
Breaking Biology News(10 mins):
(Date:5/23/2016)... ... , ... The need for blood donations in South Texas and across the nation is growing. ... Tissue Center, blood donations are on the decline. In fact, donations across the country are ... in South Texas in the last four years alone. , There is no substitute for ...
(Date:5/23/2016)... , May 23, 2016 Oxitec CEO ... th at 10:15 a.m. ET before the United States ... genetically engineered mosquitos can play in controlling the spread of ... the Zika virus.      (Logo: http://photos.prnewswire.com/prnh/20150630/227348 ... mosquito with a self-limiting gene. Trials in Brazil ...
(Date:5/23/2016)... ... 23, 2016 , ... Foresight Institute , a leading ... for the 2015 Foresight Institute Feynman Prizes. , These prestigious prizes, named ... for experiment and the other for theory in nanotechnology. Prof. Markus J. Buehler, ...
(Date:5/20/2016)... ... 20, 2016 , ... Kablooe Design, a leading provider of product design and ... anniversary of the business. “We have worked hard to build long-term relationships,” says President ... privilege and honor of serving their product design and development needs through the years.” ...
Breaking Biology Technology: