Trilingual World Observatory: italiano, english, română. GLOBAL NEWS & more... di Redazione
\\ Home Page : Articolo
Scientists have shown off what can be described as the world's smallest electric car - made of a single, carefully designed molecule.
By Admin (from 25/01/2012 @ 11:09:11, in en - Science and Society, read 1357 times)

The molecule has four branches that act as wheels, rotating when a tiny metal tip applied a small current to them.

With 10 electric bursts, the car was made to move six billionths of a metre.

The approach, published in Nature, joins recent single-molecule efforts, and seems to overcome the forces that often dominate at such tiny scales.

The "batteries" of the electric car come by way of the tip of what is called a scanning tunnelling microscope - an extraordinarily fine point of metal that ends in just an atom or two. As the tip draws near the molecule, electrons jump into it.

The motor of the approach lies with the four "molecular rotors" that act as the car's wheels; they undergo a change in shape when they absorb the electrons.

The demonstration is a tour de force in what is called "bottom-up" nanotechnology. A wide array of machines has been demonstrated in recent years, incorporating parts etched to minuscule sizes from chunks of metals or semiconductors - a small version of traditional, "top-down" manufacturing.

As the chemical groups in each "wheel" change shape, the car inches ahead

Building up from single, designed molecules is another matter, said Tibor Kudernac, a chemist now at the University of Twente, the Netherlands, and lead author of the paper.

"If you look around, in all biological systems are a vast number of molecular machines or rotors based on proteins that do important things very well; muscle contraction is based on protein motors," he explained.

"This is a simple demonstration that we can achieve anything like that. It's an important observation and I think it will motivate people to think about it perhaps a bit more from an application point of view."

Dr Kudernac concedes that applications for molecular machines like the car are probably far in the future. The first task, he said, was to make it work under normal conditions; the current work has been done at a blisteringly cold -266C and in a high vacuum.

And although each potential application will require a newly designed molecular machine, Dr Kudernac remains confident.

"There are ways to play around," he said. "That's what we chemists do - we try to design molecules for particular purposes, and I don't see any fundamental limitations."

Source: BBC

Articolo Articolo  Storico Storico Stampa Stampa  Share
Cannabis seeds, Autoflowering seeds, Greenhouse, Sweet Seeds, Dutch Passion
comments powered by Disqus
Nessun commento trovato. No comments found. Nici un comentariu găsit.

Anti-Spam: dial the numbers CAPTCHA
Text (max 5000 characters)
Nome - Name - Nume
Link ( OPTIONAL - visible on the site - NOT a must )

Tuo commento sarŕ visibile dopo la moderazione. - Your comment will be visible after the moderation. - Comentariul tău va fi vizibil după moderare.
Ci sono 2223 persone collegate

< giugno 2019 >

en - Global Observatory (605)
en - Science and Society (594)
en - Video Alert (346)
it - Osservatorio Globale (503)
it - Scienze e Societa (555)
it - Video Alerta (132)
ro - Observator Global (399)
ro - Stiinta si Societate (467)
ro - TV Network (149)
z - Games Giochi Jocuri (68)

Catalogati per mese - Filed by month - Arhivate pe luni:

Gli interventi piů cliccati

Ultimi commenti - Last comments - Ultimele comentarii:
Hi, it's Nathan!Pretty much everyone is using voice search with their Siri/Google/Alexa to ask for services and products now, and next year, it'll be EVERYONE of your customers. Imagine what you are ...
15/01/2019 @ 17:58:25
By Nathan
Now Colorado is one love, I'm already packing suitcases;)
14/01/2018 @ 16:07:36
By Napasechnik
Nice read, I just passed this onto a friend who was doing some research on that. And he just bought me lunch since I found it for him smile So let me rephrase that Thank you for lunch! Whenever you ha...
21/11/2016 @ 09:41:39
By Anonimo


Latest NEWS @

Non-Hodgkin lymphoma cured by CANNABIS. The video of Stan and Barb Rutner.

Dr. Joycelyn Elders, U.S. surgeon general: Myths About Medical Marijuana in The Providence Journal, 2004.

Marihuana vindeca CANCERUL: marturii despre uleiul de cocos si canabis.

Yahoo Incorporated Mail. My account recovery information is incorrect. The Password Helper says my password can't be reset online. "First time signing in here?" message.

All information in a video about Donatio Mortis Causa and The Venus Project

What is TOR browser?

China stands by Hong Kong leader after days of street protests

Johnson gets boost in race for UK PM's job as former rival backs him

Boeing crisis, trade tensions cast pall over air show

Spain joins France and Germany in race to build Europe's next combat jet

Canada backs startup to boost data on space debris

Boeing says will take time to win back confidence

Ultimele articole - Antena3.roDiego Maradona, ie?ire nervoasa dupa ce Argentina a pierdut în fa?a Columbiei: „Tricoul asta îl sim?i...”

Ferma cu bizoni, o afacere de succes. Pre?ul colosal cu care se vinde un kilogram de carne

SUBIECTE CAPACITATE 2019. Subiecte ?i barem EDU.RO

Familiei i s-a spus ca barbatul a murit în spatele gratiilor. Descoperirea ?ocanta facuta de rude, atunci când au ridicat corpul (FOTO)

Un profesor de 33 de ani s-a sinucis aruncându-se de pe o stânca. Gestul cutremurator a fost explicat printr-un bilet de adio

Rasar vilele în familia primarului Iasului, Mihai Chirica. Fiicele sale de gimnaziu au o casa de lux pe numele lor

17/06/2019 @ 13:20:14
script eseguito in 875 ms