Navigation Links
Researchers create gold aluminum, black platinum, blue silver
Date:2/1/2008

create nanostructures on metal surfaces that absorbed virtually all light, making something as simple as regular aluminum into one of the darkest materials ever created.

Guos black metal, with its very high absorption properties, is ideal for any application where capturing light is desirable. The potential applications range from making better solar energy collectors, to more advanced stealth technology, he says.

The ultra-brief/ultra-intense light Guo uses is produced by a femtosecond laser, which produces pulses lasting only a few quadrillionths of a second. A femtosecond is to a second what a second is to about 32 million years. During its brief burst, Guos laser unleashes as much power as the entire electric grid of North America does, all focused onto a spot the size of a needlepoint.

The intense blast forces the surface of the metal to form nanostructurespits, globules, and strands that response incoming light in different ways depending on the way the laser pulse sculpted the structures. Since the structures are smaller than the wavelength of light, the way they reflect light is highly dependent upon their specific size and shape, says Guo. Varying the laser intensity, pulse length, and number of pulses, allows Guo to control the configuration of the nanostructures, and hence control what color the metal reflects.

Guo and Vorobyev also achieve the iridescent coloring by creating microscale lines covered with nanostructures. The lines, arranged in regular rows, cause reflected light of different wavelengths to interfere differently in different directions. The result is a piece of metal that can appear solid purple from one direction, and gray from another, or multiple colors all at once.

To alter an area of metal the size of a dime currently takes 30 minutes or more, but the researchers are working on refining the technique. Fortunately, despite the incredible intensity involved, the femtosecond laser can be pow
'/>"/>

Contact: Jonathan Sherwood
jonathan.sherwood@rochester.edu
585-273-4726
University of Rochester
Source:Eurekalert  

Page: 1 2 3

Related biology technology :

1. Researchers Pinpoint Best Treatment to Reduce Deadly USA300, MRSA Staph Infections
2. Researchers develop darkest manmade material
3. Boost for Malaria Vaccine Development by Combining Strengths of Dutch and American Researchers
4. Researchers use magnetism to target cells to animal arteries
5. Ames Laboratory researchers solve fuel-cell membrane structure conundrum
6. Researchers outline structure of largest nonvirus particle ever crystallized
7. UD researchers race ahead with latest spintronics achievement
8. ASU researchers improve memory devices using nanotech
9. Researchers underscore limitations of genetic ancestry tests
10. Researchers measure carbon nanotube interaction
11. Stevens researchers provide new information about mass spectrometry
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Researchers create gold aluminum, black platinum, blue silver
(Date:9/30/2014)... September 30, 2014 Rainbow Scientific, ... research products, recently opened an online store to ... culture product lines developed and manufactured by Biological ... store include Biological Industries’ Nutristem® serum-free, xeno-free reagents ... embryonic stem cell (hESC) culture. , The ...
(Date:9/30/2014)... Whitehouse Laboratories is pleased to ... Parenteral Drug Association (PDA) to host a unique ... closure integrity testing. This lecture/laboratory course will examine the ... detailed in the recently proposed revision to USP 1207 ... will span container closure integrity testing (leak testing) critical ...
(Date:9/29/2014)... 30, 2014 Each year in ... require medical attention. In the military, burn injury ... to battlefield medical care. More than 800 service ... Burn wounds heal slowly, remain inflamed and often ... physically debilitating and functionally damaging. While developments in ...
(Date:9/29/2014)... BEACH, Va. , Sept. 29, 2014 /PRNewswire-USNewswire/ ... from the fields of cartilage repair, regeneration, allograft ... attendees from around the world gathered to discuss ... LifeNet Health Institute of Regenerative Medicine symposium, ... Direction . Topics included Orthopedic Biosurgery, Minced Juvenile ...
Breaking Biology Technology:Rainbow Scientific, Inc. opens online store for state-of-the-art stem cell culture and cytogenetic reagents 2Whitehouse Laboratories to Partner with PDA for Educational Course on Container Closure Integrity Testing 2Whitehouse Laboratories to Partner with PDA for Educational Course on Container Closure Integrity Testing 3Whitehouse Laboratories to Partner with PDA for Educational Course on Container Closure Integrity Testing 4Faster Healing with Fewer Scars 2World Renowned Experts Discuss Future Of Cartilage Regeneration 2World Renowned Experts Discuss Future Of Cartilage Regeneration 3
... Organization Exceeds Expectations, MEMPHIS, Tenn., Nov. ... exclusively focused on oncology, announced today that ... as the company continues,to experience banner growth. ... to consistently exceed client expectations, and we ...
... N.J., Nov. 10 Aton Pharma, Inc., ... a recent,survey of ophthalmologists regarding issues in ... dry eye. Aton provides the dry eye ... sustained release prescription insert that helps to ...
... 3SBio Inc. (Nasdaq:,SSRX), a leading biotechnology company focused ... in China,today announced that it has filed with ... approval of NuLeusin for the treatment of late,stage ... expected to,be the only treatment of this kind ...
Cached Biology Technology:ACORN CRO Continues Growth in Strong Third Quarter 2Dry Eye Survey: Ophthalmologists Cite Treatment Limitations/Gaps in Treatment of Moderate to Severe Dry Eye 2Dry Eye Survey: Ophthalmologists Cite Treatment Limitations/Gaps in Treatment of Moderate to Severe Dry Eye 3Dry Eye Survey: Ophthalmologists Cite Treatment Limitations/Gaps in Treatment of Moderate to Severe Dry Eye 4Dry Eye Survey: Ophthalmologists Cite Treatment Limitations/Gaps in Treatment of Moderate to Severe Dry Eye 53SBio Inc. Files for SFDA Approval of NuLeusin 23SBio Inc. Files for SFDA Approval of NuLeusin 33SBio Inc. Files for SFDA Approval of NuLeusin 4
(Date:9/29/2014)... research team says recently identified radiation detection properties of ... doors for homeland security and medical advances. , In ... issue of Optics Letters , UT Arlington Physics ... method to fabricate transparent nanoscintillators by heating nanoparticles composed ... is formed. A scintillator refers to a material ...
(Date:9/29/2014)... has presented Dr. Cristin Samper, president and CEO ... Order of San Carlos. , The Order of ... military officers who have made outstanding contributions to ... relations. , An international authority on conservation biology ... the Colombian Residence in New York to receive ...
(Date:9/29/2014)... annual Advocacy Awards will ... advancing medical progress to improve the health and ... take place on Wednesday, March 11, 2015, at ... , The 2015 Advocacy Award winners are ABC,s ... founder of the Milken Institute and FasterCures; Dr. ...
Breaking Biology News(10 mins):UT Arlington researchers develop new transparent nanoscintillators for radiation detection 2UT Arlington researchers develop new transparent nanoscintillators for radiation detection 3Research!America to honor leaders in medical and health research advocacy 2Research!America to honor leaders in medical and health research advocacy 3Research!America to honor leaders in medical and health research advocacy 4
... warming despite emitting small amounts of an important greenhouse gas, ... of Edinburgh suggests that plant leaves account for less than ... is considered to be about 25 times more effective than ... a previous scientific study which had suggested that plants were ...
... WASHINGTON, April 29, 2010 The American Chemical ... has awarded its 2010 research grant to Scottish ... strides in expanding green chemistry and engineering practices ... the one-year $150,000-grant to further his study of ...
... Thomas Miller , an internationally recognized expert at ... and genetics, has been chosen by the U.S. Department ... Fellowship . Miller is one of only ten ... applicants undergo a rigorous selection process, are highly accomplished ...
Cached Biology News:ACS Green Chemistry Institute Pharmaceutical Roundtable award goes to Scottish chemist 2US Department of State names UCR entomologist a Jefferson Science Fellow 2US Department of State names UCR entomologist a Jefferson Science Fellow 3