Navigation Links
Scientists scale terahertz peaks in nanotubes
Date:12/9/2013

HOUSTON (Dec. 9, 2013) Carbon nanotubes carry plasmonic signals in the terahertz range of the electromagnetic spectrum, but only if they're metallic by nature or doped.

In new research, the Rice University laboratory of physicist Junichiro Kono disproved previous theories that dominant terahertz response comes from narrow-gap semiconducting nanotubes.

Knowing that metallic or doped nanotubes respond with plasmonic waves at terahertz frequencies opens up the possibility that the tubes can be used in a wide array of optoelectronic amplifiers, detectors, polarizers and antennas.

The work by Kono and his Rice colleagues appeared online recently in the American Chemical Society journal Nano Letters.

Scientists have long been aware of a terahertz peak in nanotubes, the tiny cylinders of rolled-up carbon that show so much promise for advanced materials. But experiments on batches of nanotubes, which generally grow in a willy-nilly array of types, failed to reveal why it was there.

The origin of the peak was not explainable because researchers were only able to experiment on mixed batches of nanotube types, said Qi Zhang, a graduate student in Kono's group and lead author of the paper. "All the previous work was done with a mixture of semiconducting and metallic tubes. We are the first to clearly identify the plasmonic nature of this terahertz response," he said.

Rice's growing expertise in separating nanotubes by type allowed Kono and his group to test for terahertz peaks in batches of pure metallic nanotubes known as "armchairs" as well as nonmetallic, semiconducting tubes.

"Metallic carbon nanotubes are expected to show plasmon resonance in the terahertz and infrared range, but no group has clearly demonstrated the existence of plasmons in carbon nanotubes," Zhang said. "Previously, people proposed one possible explanation -- that the terahertz peak is due to interband absorption in
'/>"/>

Contact: David Ruth
david@rice.edu
713-348-6327
Rice University
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Scientists defuse the Vietnam time bomb
2. Singapore scientists lead human embryonic stem cell study
3. Sheffield scientists shine a light on the detection of bacterial infection
4. Nanowiggles: Scientists discover graphene nanomaterials with tunable functionality in electronics
5. Scientists solve mystery of colorful armchair nanotubes
6. iBioSeminars and iBioMagazine: Free, Online Biology Seminars and Short Talks by Leading Scientists
7. Chinese Scientists Zhen-Yi Wang and Zhu Chen Awarded 7th Annual Szent-Gyorgyi Prize for Progress in Cancer Research
8. Scientists decode brain waves to eavesdrop on what we hear
9. Receptos Scientists Publish Determination of a High Resolution Sphingosine 1-Phosphate Receptor 1 Structure in Science
10. Scientists learn how to out run damage with imaging technique
11. Design eye for the science guy: Drop-in clinic helps scientists communicate data
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists scale terahertz peaks in nanotubes
(Date:7/11/2014)... , Not for release, publication or distribution (in whole ... to do so would constitute a violation of the relevant ... the "Company") (LSE: SHP, NASDAQ: SHPG ) notes ... a meeting with representatives of AbbVie. This statement ... approval of AbbVie. A further update will be ...
(Date:7/11/2014)... , July 11, 2014 EPFL ... announce the appointment of John P. Donoghue . ...   in  Geneva . The new ... Biotech in Geneva , has named ... neuroscientists. John P. Donoghue , founder of Brown ...
(Date:7/11/2014)... 2014 Cayenne Medical, Inc., a ... the soft tissue reconstruction segment, announced the worldwide ... surgeries involving the shoulder and extremities. The SureLock ... inserter-controlled deployment method. The unique delivery eliminates manual ... pull-out, or anchor displacement (also commonly know as ...
(Date:7/10/2014)... Deep Knowledge Ventures last week ... ‘Commercialising Longevity Research’ and welcomed a host of ... Bioscience Innovation Center for the event, organised by ... Ltd. The meeting highlighted the need for both ... age-related disease, as well as the crucial role ...
Breaking Biology Technology:Shire plc - Statement re: Media Speculation 2John P. Donoghue is Taking the Lead at the Wyss Center and is Appointed Professor at EPFL and University of Geneva 2John P. Donoghue is Taking the Lead at the Wyss Center and is Appointed Professor at EPFL and University of Geneva 3Cayenne Medical Launches SureLock™ All-Suture Anchor System for Shoulder and Extremity Surgery 2Cayenne Medical Launches SureLock™ All-Suture Anchor System for Shoulder and Extremity Surgery 3DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 2DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 3DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 4DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 5DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 6
... body of an ordinary family car consists of 193 different ... car has been carefully selected and optimised. It is important, ... because of the fuel consumption, whereas other parts of the ... passengers in a collision. Super strong nanostructured metals ...
... 21, 2011 ViroPharma Incorporated,s (Nasdaq: VPHM ) ... released on Thursday, July 28, 2011 before the open of ... a conference call and live audio webcast at 9:00 a.m. ... ViroPharma management will discuss the 2011 second quarter financial results ...
... Inc. (OTC/BB: GNBP), a biotechnology company developing targeted cancer ... Merrill A. McPeak to its Board of Directors.  General ... Force and was USAF chief of staff from 1990 ... 7 members, including 5 independent directors. "General ...
Cached Biology Technology:A new discovery paves the way for using super strong nanostructured metals in cars 2A new discovery paves the way for using super strong nanostructured metals in cars 3ViroPharma to Release 2011 Second Quarter Financial Results on July 28, 2011 2Genesis Biopharma Names Former Member of the Joint Chiefs of Staff General Merrill McPeak to Board of Directors 2
(Date:7/11/2014)... A new report from the Wildlife Conservation Society ... only help economically valuable species such as lobster, ... also help re-colonize nearby reef areas. , The ... a systematic review of research literature from no-take ... by Dr. Craig Dahlgren, a recognized expert in ...
(Date:7/11/2014)... 11, 2014--Researchers at the Department of Energy,s Oak ... awards, presented by R&D Magazine in recognition of ... awards recognize the tremendous value of our National ... and development at the National Labs continues to ... pursue the scientific and technological innovations necessary to ...
(Date:7/11/2014)... in eastern New South Wales, Australia when NASA,s Aqua ... UTC on July 11 (12:35 p.m. local time/11:35 p.m. ... New South Wales (NSW), the Moderate Resolution Imaging Spectroradiometer ... region and spotted smoke (light brown) from various fires. ... outlined in red. , The New South Wales, Australia ...
Breaking Biology News(10 mins):Belize's lobster, conch, and fish populations rebuild in no-take zones 2ORNL wins eight R&D 100s 2ORNL wins eight R&D 100s 3ORNL wins eight R&D 100s 4
... researchers have discovered that a recently identified protein critical ... keep its repairs accurate. , The protein, called ... proteins known as DNA polymerases that are vital for ... other DNA-repair proteins insure their accuracy with the help ...
... sheds light on the molecular mechanisms underlying axon growth ... a study published today in the open access journal ... UNC-69, required for proper locomotion . They show that ... to be involved in the trafficking of vesicles along ...
... Portabella and crimini mushrooms rank with carrots, green beans, ... antioxidants, Penn State researchers say. , Dr. N. Joy ... at Penn State, measured the activity of two antioxidants, ... assay and HPLC instrumentation, as part of her dissertation ...
Cached Biology News:Unusual mechanism keeps repair protein accurate 2Unusual mechanism keeps repair protein accurate 3Newly identified protein complex sheds light on axon growth mechanism 2Mushrooms as good an antioxidant source as more colorful veggies 2
... scientists developed the Easy-Titer Human IgM Assay ... simple, sensitive, and easy-to-perform assay for Human ... ELISA. This kit incorporates a simple mix-and-read ... IgM concentration from 15-500 ng/ml in approximately ...
... clarification reagent; Ideal for clarifying many ... proteins, nucleic acids, & proteoglycans; Contains ... improves downstream processing; Utilizes a reagent ... supplied as a suspension in saline; ...
A simple, sensitive and reliable method for determining free sulfhydryl content in peptides, protein...
... true benchtop incubator-shaker, has the smallest footprint of ... of 540 x 680 mm (W x D) ... x 505 x 510mm). Available in 25 mm ... ideal for shaking applications requiring controlled speed and ...
Biology Products: