Navigation Links
Scientists design, control movements of molecular motor

ATHENS, Ohio (Jan. 10, 2013)An international team of scientists has taken the next step in creating nanoscale machines by designing a multi-component molecular motor that can be moved clockwise and counterclockwise. Although researchers can rotate or switch individual molecules on and off, the new study is the first to create a stand-alone molecular motor that has multiple parts, said Saw-Wai Hla, an Ohio University professor of physics and astronomy who led the study with Christian Joachim of A*Star in Singapore and CEMES/CNRS in France and Gwenael Rapenne of CEMES/CNRS.

It's an essential step in creating nanoscale devicesquantum machines that operate on different laws of physics than classical machinesthat scientists envision could be used for everything from powering quantum computers to sweeping away blood clots in arteries.

In the study, published in Nature Nanotechnology, the scientists demonstrated that they could control the motion of the motor with energy generated by electrons from a scanning tunneling microscope tip. The motor is about 2 nanometers in length and 1 nanometer high and was constructed on a gold crystal surface.

At a temperature of minus 315 degrees Fahrenheit, the motor could move independently through thermal excitation. When scientists cooled the sample to minus 450 degrees, the motor stopped rotating. The researchers selectively applied electron energy to different parts of the motor to prompt it to move clockwise and counterclockwise.

"If we want to build an actual device based on this motor, we would install electrodes on the surface to create an energy source," Hla said. To construct the molecular motor, the scientific team designed a stationary base of atoms that is connected to an upper moving part by one atom of ruthenium, which serves as the "ball bearing." The upper piece of the motor features five arms made of iron atoms. The researchers made one arm shorter than the others to be able to track the motion of the machine. The entire device is held upright by using sulfur as an "atomic glue" to secure the motor to the gold surface, Hla explained.

The scientists now plan to use this model to build more complex machines with components that could be automated, Hla said.


Contact: Andrea Gibson
Ohio University

Related biology technology :

1. Scientists defuse the Vietnam time bomb
2. Singapore scientists lead human embryonic stem cell study
3. Sheffield scientists shine a light on the detection of bacterial infection
4. Nanowiggles: Scientists discover graphene nanomaterials with tunable functionality in electronics
5. Scientists solve mystery of colorful armchair nanotubes
6. iBioSeminars and iBioMagazine: Free, Online Biology Seminars and Short Talks by Leading Scientists
7. Chinese Scientists Zhen-Yi Wang and Zhu Chen Awarded 7th Annual Szent-Gyorgyi Prize for Progress in Cancer Research
8. Scientists decode brain waves to eavesdrop on what we hear
9. Receptos Scientists Publish Determination of a High Resolution Sphingosine 1-Phosphate Receptor 1 Structure in Science
10. Scientists learn how to out run damage with imaging technique
11. Design eye for the science guy: Drop-in clinic helps scientists communicate data
Post Your Comments:
Related Image:
Scientists design, control movements of molecular motor
(Date:11/30/2015)... Israel , Nov. 30, 2015 BrainStorm Cell ... of adult stem cell technologies for neurodegenerative diseases, today announced ... awarded an additional grant of approximately $735,000 from ... grant, the second this year, brings the total awarded by ... (approximately NIS7 million).  ...
(Date:11/27/2015)... PA (PRWEB) , ... November 27, 2015 , ... ... Technical Program that includes over 2,000 technical presentations offered in symposia, oral ... chemistry and applied spectroscopy, covers a wide range of applications such as, but ...
(Date:11/26/2015)... November 26, 2015 --> ... specializing in imaging technologies, announced today that it has received ... of the Horizon 2020 European Union Framework Programme for Research ... clinical trial in breast cancer. , --> ... --> --> The study aims ...
(Date:11/25/2015)... -- 2 nouvelles études permettent d , ... entre les souches bactériennes retrouvées dans la plaque ... . Ces recherches  ouvrent une nouvelle voie ... efficace de l,un des problèmes de santé les ...    --> 2 nouvelles études permettent d ...
Breaking Biology Technology:
(Date:11/18/2015)... PHILADELPHIA , Nov. 18, 2015  As new ... in children, doctors and other healthcare providers face challenges ... counsel families and patients. In addition, as more children ... into a patient,s adulthood and old age. ... The Children,s Hospital of Philadelphia (CHOP) . ...
(Date:11/17/2015)... Nov. 17, 2015  Vigilant Solutions announces today that ... Board of Directors. --> ... retiring from the partnership at TPG Capital, one of ... over $140 Billion in revenue.  He founded and led ... the TPG companies, from 1997 to 2013.  In his ...
(Date:11/12/2015)... CAMBRIDGE, Mass. , Nov. 12, 2015 /PRNewswire/ ... Broad Institute of MIT and Harvard for use ... chemical discovery information management tools. The partnership will ... share both biological and chemical research information internally ... tools will be used for managing the Institute,s ...
Breaking Biology News(10 mins):