Navigation Links
The world's smallest steam engine
Date:12/12/2011

he tiny engine according to the blueprint of a normal-sized one. In the heat engine invented almost 200 years ago by Robert Stirling, a gas-filled cylinder is periodically heated and cooled so that the gas expands and contracts. This makes a piston execute a motion with which it can drive a wheel, for example.

"We successfully decreased the size of the essential parts of a heat engine, such as the working gas and piston, to only a few micrometres and then assembled them to a machine," says Valentin Blickle. The working gas in the Stuttgart-based experiment thus no longer consists of countless molecules, but of only one individual plastic bead measuring a mere three micrometres (one micrometre corresponds to one thousandth of a millimetre) which floats in water. Since the colloid particle is around 10,000 times larger than an atom, researchers can observe its motion directly in a microscope.

The physicists replaced the piston, which moves periodically up and down in a cylinder, by a focused laser beam whose intensity is periodically varied. The optical forces of the laser limit the motion of the plastic particle to a greater and a lesser degree, like the compression and expansion of the gas in the cylinder of a large heat engine. The particle then does work on the optical laser field. In order for the contributions to the work not to cancel each other out during compression and expansion, these must take place at different temperatures. This is done by heating the system from the outside during the expansion process, just like the boiler of a steam engine. The researchers replaced the coal fire of an old-fashioned steam engine with a further laser beam that heats the water suddenly, but also lets it cool down as soon as it is switched off.

The fact that the Stuttgart machine runs rough is down to the water molecules which surround the plastic bead. The water molecules are in constant motion due to their temperature and continually collid
'/>"/>

Contact: Professor Dr. Clemens Bechinger
C.Bechinger@physik.uni-stuttgart.de
49-711-685-65218
Max-Planck-Gesellschaft
Source:Eurekalert  

Page: 1 2 3

Related biology technology :

1. Ansell Launches Worldss First Antimicrobial Surgical Glove
2. The smallest conceivable switch
3. Researchers develop one of the worlds smallest electronic circuits
4. New technique maps twin faces of smallest Janus nanoparticles
5. Worlds smallest electric motor made from a single molecule
6. The worlds smallest wedding rings
7. Quantum hot potato: NIST researchers entice 2 atoms to swap smallest energy units
8. Smallest magnetic field sensor in the world
9. Worlds smallest battery created at CINT nanotechnology center
10. Scientists discover worlds smallest superconductor
11. Smallest nanoantennas for high-speed data networks
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
The world's smallest steam engine
(Date:3/6/2015)... 06, 2015 Anton Paar has released ... by utilizing laboratory refractometers. Sodium hydroxide (NaOH, also ... producing a variety of products including pretzels, colored fabrics, ... staple of the chemical industry; its applications range from ... nearly everything in between. NaOH is used in ...
(Date:3/5/2015)...   HX360 today announced that sixteen companies ... Innovation Challenge competition. These companies, selected from a ... as one of four finalists to present their solutions ... and venture capitalists during the Innovation Challenge event. ... the 2015 HIMSS Annual Conference & Exhibition, McCormick Place ...
(Date:3/5/2015)... NC (PRWEB) March 05, 2015 ... that Pierre Noel, M.D., Professor of Medicine, Mayo ... the Company’s Board of Directors. , ... are extremely fortunate to have Dr. Noel, a ... leading healthcare organization, join Entegrion’s Board. His expertise ...
(Date:3/5/2015)... March 05, 2015 e2b teknologies ... Partner located in Northeast Ohio, today announced a leading ... to support its upgrade to the latest version of ... independent group practice of its kind in the region, ... volume of transactions, so efficiency and data accessibility are ...
Breaking Biology Technology:HX360 Announces Sixteen Innovation Challenge Semi-finalists Competing To Deliver Solutions That Improve The Patient Experience 2HX360 Announces Sixteen Innovation Challenge Semi-finalists Competing To Deliver Solutions That Improve The Patient Experience 3HX360 Announces Sixteen Innovation Challenge Semi-finalists Competing To Deliver Solutions That Improve The Patient Experience 4Entegrion Announces Appointment of Pierre Noel, MD, to Its Board of Directors 2Physician Group Practice Chooses e2b teknologies to Support Its Upgrade to Sage 100 ERP 2014 2
... Presentations Accepted to Meeting, CAMBRIDGE, Mass., ... that 23 presentations will showcase its lead,antibiotic ... at the upcoming 47th Annual Interscience Conference ... in Chicago,September 17-20, 2007. Thomas Parr, ...
... is pleased to,announce the development of a comprehensive ... Therapy (VMAT)*. The complete,offering of Elekta VMAT solutions ... year,s European Society of Therapeutic Radiation Oncologists (ESTRO),meeting ... Elekta,enables helical- like conformality and can help reduce ...
... that the body,s innate ability to adapt to recurring ... less costly artificial respirators. The new approach could minimize ... necessary for some patients on mechanical ventilation. , Nonassociative ... stimuli, is the focus of work to be described ...
Cached Biology Technology:Targanta Therapeutics to Have Significant Presence at 47th Annual ICAAC Meeting 2Targanta Therapeutics to Have Significant Presence at 47th Annual ICAAC Meeting 3Targanta Therapeutics to Have Significant Presence at 47th Annual ICAAC Meeting 4Targanta Therapeutics to Have Significant Presence at 47th Annual ICAAC Meeting 5Targanta Therapeutics to Have Significant Presence at 47th Annual ICAAC Meeting 6Targanta Therapeutics to Have Significant Presence at 47th Annual ICAAC Meeting 7Elekta Displays Complete Volumetric Intensity Modulated Arc Therapy Solutions at ESTRO 2Elekta Displays Complete Volumetric Intensity Modulated Arc Therapy Solutions at ESTRO 3MIT: Leveraging learning for artificial respiration 2
(Date:3/2/2015)... 2, 2015 Synaptics Inc. (NASDAQ: ... interface solutions, today announced a new implementation of ... enable rapid and secure transactions and reliable identification ... is a turnkey solution providing mouse and keyboard ... integrate fingerprint ID solutions into their product offerings, ...
(Date:2/24/2015)... NEW YORK , Feb. 24, 2015 This ... Thousands. The report provides separate comprehensive analytics for the US, ... Europe , Asia-Pacific , ... America . Annual estimates and forecasts are provided for ... is provided for these markets. Market data and analytics are ...
(Date:2/19/2015)... DUBLIN , Feb .19, 2015 Research ... announced the addition of the "Military Electro-Optical ... by Sensor Technology, by Platform - Forecast to ... The military electro-optical/infrared systems market is expected ... a CAGR of 7.71%. This report ...
Breaking Biology News(10 mins):Synaptics Unveils New Fingerprint ID Solution for Gamers 2Synaptics Unveils New Fingerprint ID Solution for Gamers 3World Iris Biometrics Industry 2World Iris Biometrics Industry 3World Iris Biometrics Industry 4World Iris Biometrics Industry 5World Iris Biometrics Industry 6World Iris Biometrics Industry 7World Iris Biometrics Industry 8World Iris Biometrics Industry 9World Iris Biometrics Industry 10World Iris Biometrics Industry 11Military Electro-Optical / Infrared Systems (Image Intensification, Laser, Infrared) Market - Forecast to 2020: Featuring Profiles of the Market Leaders on this $16 Billion market 2Military Electro-Optical / Infrared Systems (Image Intensification, Laser, Infrared) Market - Forecast to 2020: Featuring Profiles of the Market Leaders on this $16 Billion market 3
... pivotal clinical trial for an anti-rabies human monoclonal ... between MassBiologics of the University of Massachusetts Medical ... is starting to enroll patients. The study, sponsored ... of post-exposure prophylaxis following rabies exposure with RMAb ...
... 2012The body,s natural reaction to reject replacement proteins represents a ... cure a range of life-threatening diseases. A novel method that ... a specific protein was shown to suppress the rejection response, ... , a peer-reviewed journal from Mary Ann Liebert, Inc.,( http://www.liebertpub.com ...
... Bioengineered replacements for tendons, ligaments, the meniscus of ... exquisite architecture of these tissues in three dimensions. These ... ordered structure that gives them their robust ability to ... labs have been designing treatments for ACL and meniscus ...
Cached Biology News:Clinical trial for rabies monoclonal antibody 2Clinical trial for rabies monoclonal antibody 3Method to prevent rejection of disease-fighting proteins described in Human Gene Therapy journal 2Composite nanofibers developed by Penn scientists next chapter in orthopaedic biomaterials 2
...
Recombinant Feline IFN-alpha...
Anti-OSMR Monoclonal Antibody Research Focus: cytokine/growth factor Storage: 4C Shipping Temperature: 4C...
Rabbit polyclonal to Presenilin 1, prediluted ( Abpromise for all tested applications). entrezGeneID: 5663 SwissProtID: P49768...
Biology Products: