Navigation Links
'Mirage-effect' helps researchers hide objects
Date:10/3/2011

Scientists have created a working cloaking device that not only takes advantage of one of nature's most bizarre phenomenon, but also boasts unique features; it has an 'on and off' switch and is best used underwater.

The researchers, from the University of Dallas, Texas, have demonstrated the device's ability to make objects disappear in a fascinating video shown here http://www.youtube.com/watch?v=3YO4TTpYg7g

This novel design, presented today, Tuesday 4 September, in IOP Publishing's journal Nanotechnology, makes use of sheets of carbon nanotubes (CNT) one-molecule-thick sheets of carbon wrapped up into cylindrical tubes.

CNTs have such unique properties, such as having the density of air but the strength of steel, that they have been extensively studied and put forward for numerous applications; however it is their exceptional ability to conduct heat and transfer it to surrounding areas that makes them an ideal material to exploit the so-called "mirage effect".

The mirage effect, frequently observed in deserts or on long roads in the summer, is an optical phenomenon in which light rays are bent to produce a displaced image of distant objects or the sky.

The most common example of a mirage is when an observer appears to see pools of water on the ground. This occurs because the air near the ground is a lot warmer than the air higher up, causing lights rays to bend upward towards the viewer's eye rather than bounce off the surface.

This results in an image of the sky appearing on the ground which the viewer perceives as water actually reflecting the sky; the brain sees this as a more likely occurrence.

Through electrical stimulation, the transparent sheet of highly aligned CNTs can be easily heated to high temperatures. They then have the ability to transfer that heat to its surrounding areas, causing a steep temperature gradient. Just like a mirage, this steep temperature gradient causes the light rays to bend away from the object concealed behind the device, making it appear invisible.

With this method, it is more practical to demonstrate cloaking underwater as all of the apparatus can be contained in a petri dish. It is the ease with which the CNTs can be heated that gives the device its unique 'on and off' feature.

Lead-author, Dr Ali Aliev, said, "Using these nanotube sheets, concealment can be realized over the entire optical range and rapidly turned on-and-off at will, using either electrical heating or a pulse of electromagnetic radiation.

"The research results also provide useful insights into the optimization of nanotube sheets as thermoacoustic projectors for loud speaker and sonar applications, where sound is produced by heating using an alternating electrical current."

An Institute of Physics spokesperson said, "It is remarkable to see this cloaking device demonstrated in real life and on a workable scale. The array of applications that could arise from this device, besides cloaking, is a testament to the excellent work of the authors."


'/>"/>

Contact: Michael Bishop
michael.bishop@iop.org
01-179-301-032
Institute of Physics
Source:Eurekalert

Related biology technology :

1. Duff & Phelps Acquires Lumin Expert Group To Build Global Intellectual Property Practice
2. City of Hope Helps KGI Launch New Management Training Program for Scientists
3. CSL Behrings Innovative HeliTrax(SM) System Helps Physicians Manage Hemophilia A Patients
4. New nanotechnology centre helps turn big ideas into real products
5. Amoena Helps Women Re-shape Their Lives After Breast Cancer Surgery
6. Riverock Technologies Helps Misukanis & Odden Eliminate Task Management Obstacles
7. The Lancets New Online Medical Journal Helps Clinicians and Medical Researchers Find Practice-Changing Evidence Quickly and Easily
8. VAP(R) Cholesterol Test Helps Researchers Identify Treatment Effects of Combination Therapy
9. RNAi Helps Illuminate the Inner Workings of the Cell Cycle: Synthetic RNAissance™ Genes Created by DNA2.0 Enable Key Research
10. Noninvasive Medical Technologies Helps Make Young Tennessee Womans Wishes Come True
11. Family Medicine Cabinet: Free, New On-Line Tool Helps Track Your Medication Safety
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/22/2017)... ... 22, 2017 , ... AESKU.GROUP, an innovation leader in ... Technologien GmbH, thereby expanding its product portfolio to include allergy and food intolerance ... atopic eczema or a food allergy. Allergies are escalating to epidemic proportions and ...
(Date:6/22/2017)... ... 2017 , ... The first human cell line HeLa, established in 1951, has ... cross-contamination of human cell lines with HeLa cells were published. Until recently, cross-contamination and ... and is associated with dramatic consequences for research. , In this educational webinar, ...
(Date:6/20/2017)... ... ... Biologist Dawn Maslar MS has found a biomarker that she claims verifies ... The Neuroscience of Meeting, Dating, Losing Your Mind, and Finding True Love, Maslar found ... step, in my estimation, was to scientifically track the evidence of commitment in men,” ...
(Date:6/20/2017)... ... June 20, 2017 , ... Do More with OHAUS , With the ... trusted supplier in the weighing industry, to extending its expertise across the entire laboratory ... immunoassays, hybridizations and more, allowing for its customers to 'Do More' in ...
Breaking Biology Technology:
(Date:4/17/2017)... , April 17, 2017 NXT-ID, Inc. ... company, announces the filing of its 2016 Annual Report on Form ... Exchange Commission. ... Form 10-K is available in the Investor Relations section of the ... on the SEC,s website at http://www.sec.gov . 2016 ...
(Date:4/11/2017)... 11, 2017 Research and Markets has announced ... report to their offering. ... global eye tracking market to grow at a CAGR of 30.37% ... Tracking Market 2017-2021, has been prepared based on an in-depth market ... landscape and its growth prospects over the coming years. The report ...
(Date:4/5/2017)... Allen Institute for Cell Science today announces the launch ... dynamic digital window into the human cell. The website ... deep learning to create predictive models of cell organization, ... suite of powerful tools. The Allen Cell Explorer will ... resources created and shared by the Allen Institute for ...
Breaking Biology News(10 mins):