Home | Community | Message Board

Original Seeds Store
This site includes paid links. Please support our sponsors.


Welcome to the Shroomery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more!

Shop: North Spore North Spore Mushroom Grow Kits & Cultivation Supplies   Kraken Kratom Red Vein Kratom   Original Sensible Seeds Bulk Cannabis Seeds   PhytoExtractum Buy Bali Kratom Powder

Jump to first unread post Pages: 1
InvisibleAcyl
cyanidepoisoning
Male User Gallery

Registered: 12/13/05
Posts: 4,472
Loc: N.W.T.
"Walking molecule" ... 9,10-dithioanthracene
    #8774860 - 08/14/08 08:32 PM (15 years, 9 months ago)

http://www.newsroom.ucr.edu/cgi-bin/display.cgi?id=1166&type=print

Quote:



Molecule Walks Like a Human

Moving one step at a time, newly designed molecule walks in a straight line; potential applications in molecular computing
(September 26, 2005)

Using linkers for feet (shown in red), the molecule "9,10-dithioanthracene" moves in a straight line on a flat surface, such as a copper sheet shown here, by mimicking a human walking. Photo credit: L. Bartels. Using linkers for feet (shown in red), the molecule "9,10-dithioanthracene" moves in a straight line on a flat surface, such as a copper sheet shown here, by mimicking a human walking. Photo credit: L. Bartels.
RIVERSIDE, Calif. — A research team, led by UC Riverside’s Ludwig Bartels, is the first to design a molecule that can move in a straight line on a flat surface. It achieves this by closely mimicking human walking. The “nano-walker” offers a new approach for storing large amounts of information on a tiny chip and demonstrates that concepts from the world we live in can be duplicated at the nanometer scale — the scale of atoms and molecules.

The molecule — 9,10-dithioanthracene or “DTA” — has two linkers that act as feet. Obtaining its energy from heat supplied to it, the molecule moves such that only one of the linkers is lifted from the surface; the remaining linker guides the motion of the molecule and keeps it on course. Alternating the motions of its two “feet,” DTA is able to walk in a straight line without the assistance of nano-rails or nano-grooves for guidance.

The researchers will publish their work next month in Physical Review Letters.

“Similar to a human walking, where one foot is kept on the ground while the other moves forward and propels the body, our molecule always has one linker on a flat surface, which prevents the molecule from stumbling to the side or veering off course,” said Bartels, assistant professor of chemistry and a member of UCR’s Center for Nanoscale Science and Engineering. “In tests, DTA took more than 10,000 steps without losing its balance once. Our work proves that molecules can be designed deliberately to perform certain dynamic tasks on surfaces.”

Bartels explained that, ordinarily, molecules move in every unpredictable direction when supplied with thermal energy. “DTA only moves along one line, however, and retains this property even if pushed or pulled aside with a fine probe.” Bartels said. “This offers an easy realization of a concept for molecular computing proposed by IBM in the 1990s, in which every number is encoded by the position of molecules along a line similar to an abacus, but about 10 million times smaller. IBM abandoned this concept, partly because there was no way to manufacture the bars of the abacus at molecule-sized spacing.

“DTA does not need any bars to move in a straight line and, hence, would allow a much simpler way of creating such molecular memory, which would be more than 1000 times more compact than current devices.”

The UCR research team is now trying to build a molecular ratchet, which would convert random thermal oscillation into directed motion. “It would be similar to an automatic watch that rewinds itself on the arm of the bearer — except that it would be just one nanometer in diameter,” Bartels said.

A nanometer is one billionth of a meter. A nanometer is to a meter what an inch is to 15,783 miles, more than half the distance around the Earth’s equator.

Bartels was assisted in the study by Ki-Young Kwon, Kin L. Wong and Greg Pawin of UCR; and Sergey Stolbov and Talat S. Rahman of Kansas State University. The US Department of Energy funded the research. Additional support came from the Petroleum Research Fund and the Air Force Office of Scientific Research. The San Diego Supercomputer Center provided computational resources.

Related Links:
# UCR Department of Chemistry
# Center for Nanoscale Science & Engineering
Additional Contacts:
# Ludwig Bartels
The University of California, Riverside is a major research institution and a national center for the humanities. Key areas of research include nanotechnology, genomics, environmental studies, digital arts and sustainable growth and development. With a current undergraduate and graduate enrollment of nearly 17,000, the campus is projected to grow to 21,000 students by 2010. Located in the heart of inland Southern California, the nearly 1,200-acre, park-like campus is at the center of the region's economic development. Visit www.ucr.edu or call 951-UCR-NEWS for more information. Media sources are available at http://www.mediasources.ucr.edu/.

Produced by the Office of Strategic Communications.
Copyright © 2007, Regents of the University of California
This page is dynamically generated.
Maintained by: Webmaster





Future of real AI?


--------------------
:scrambled:

1 ,2

Extras: Filter Print Post Top
Invisiblejohnm214
Male User Gallery

Folding@home Statistics
Registered: 05/31/07
Posts: 17,582
Loc: Americas
Re: "Walking molecule" ... 9,10-dithioanthracene [Re: Acyl]
    #8774913 - 08/14/08 08:43 PM (15 years, 9 months ago)

mysoin also walks across actin, and so far I've seen no evidence people with excess myosin are intelligent, though they often look artificial, so I guess that's a start.

Extras: Filter Print Post Top
InvisibleAcyl
cyanidepoisoning
Male User Gallery

Registered: 12/13/05
Posts: 4,472
Loc: N.W.T.
Re: "Walking molecule" ... 9,10-dithioanthracene [Re: johnm214]
    #8776735 - 08/15/08 08:44 AM (15 years, 9 months ago)

:lol:


--------------------
:scrambled:

1 ,2

Extras: Filter Print Post Top
InvisibleMinstrel
Man of Science
Male User Gallery


Registered: 03/15/05
Posts: 1,974
Loc: Hogtown
Re: "Walking molecule" ... 9,10-dithioanthracene [Re: Acyl]
    #8792593 - 08/18/08 08:19 PM (15 years, 8 months ago)

I'd really like to see this paper.  It all seems so counter-intuitive.

Anthracene is very rigid; it's hard to envision it 'walking' like a human.  Also, since it's symmetrical, I don't see how it's motion could be influenced in a discrete direction across a surface.  What's the driving force?

I'd like to see if the sides of the anthracene could be substituted with different groups so as to allow it's movement by external electric or magnetic fields.  THEN I could see it being used for data storage.


--------------------

Extras: Filter Print Post Top
Jump to top Pages: 1

Shop: North Spore North Spore Mushroom Grow Kits & Cultivation Supplies   Kraken Kratom Red Vein Kratom   Original Sensible Seeds Bulk Cannabis Seeds   PhytoExtractum Buy Bali Kratom Powder


Similar ThreadsPosterViewsRepliesLast post
* Holy Shit 45 Nanometer Mass-produced Intel x86 Chips! DiploidM 950 5 10/27/07 05:55 PM
by Horse_Meister
* Walking on the walls or ceiling soon to be reality? TackleBerry 779 4 05/24/03 02:37 PM
by chodamunky
* 10 M NaOH down the drain? micro 5,825 6 12/03/03 01:04 AM
by Demiurge
* Mandrakelinux 10.1 Community (ON DVD) Fungi_x 858 12 12/14/04 09:22 PM
by AhronZombi
* Total Lunar Eclipse tonight 10:23-11:45pm entiformatie 835 6 10/28/04 01:58 PM
by daussaulit
* ADSL Modem with Mandrake Linux 10.1 chrispc 890 5 12/28/04 02:35 AM
by chrispc
* get $10 off your cell phone bill a month daussaulit 837 3 10/24/04 09:38 PM
by browndustin
* The chem book I promised rommstein2001 8,041 4 10/01/03 07:52 PM
by Le_Canard

Extra information
You cannot start new topics / You cannot reply to topics
HTML is disabled / BBCode is enabled
Moderator: trendal, automan, Northerner
2,126 topic views. 0 members, 0 guests and 3 web crawlers are browsing this forum.
[ Show Images Only | Sort by Score | Print Topic ]
Search this thread:

Copyright 1997-2024 Mind Media. Some rights reserved.

Generated in 0.024 seconds spending 0.007 seconds on 14 queries.