Navigation Links
MIT researchers develop a way to funnel solar energy
Date:9/12/2010

etween the hole and the electron is known as the bandgap.

The inner layer of the antenna contains nanotubes with a small bandgap, and nanotubes in the outer layer have a higher bandgap. That's important because excitons like to flow from high to low energy. In this case, that means the excitons in the outer layer flow to the inner layer, where they can exist in a lower (but still excited) energy state.

Therefore, when light energy strikes the material, all of the excitons flow to the center of the fiber, where they are concentrated. Strano and his team have not yet built a photovoltaic device using the antenna, but they plan to. In such a device, the antenna would concentrate photons before the photovoltaic cell converts them to an electrical current. This could be done by constructing the antenna around a core of semiconducting material.

The interface between the semiconductor and the nanotubes would separate the electron from the hole, with electrons being collected at one electrode touching the inner semiconductor, and holes collected at an electrode touching the nanotubes. This system would then generate electric current. The efficiency of such a solar cell would depend on the materials used for the electrode, according to the researchers.

Strano's team is the first to construct nanotube fibers in which they can control the properties of different layers, an achievement made possible by recent advances in separating nanotubes with different properties.

While the cost of carbon nanotubes was once prohibitive, it has been coming down in recent years as chemical companies build up their manufacturing capacity. "At some point in the near future, carbon nanotubes will likely be sold for pennies per pound, as polymers are sold," says Strano. "With this cost, the addition to a solar cell might be negligible compared to the fabrication and raw material cost of the cell itself, just as coatings and polymer components are sm
'/>"/>

Contact: Jessica Holmes
holmesj@mit.edu
617-253-2702
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Mount Sinai researchers analyze impact of chemical BPA in dental sealants used in children
2. Swine researchers seek answers to fibers low digestibility
3. Twins are intriguing research subjects for Notre Dame biometircs researchers
4. Researchers at UC Riverside find solution to cell death problem vexing stem cell research
5. Researchers at Childrens Hospital Los Angeles find diet-induced obesity accelerates leukemia
6. Researchers define role of CEP290 in maintaining ciliary function
7. Research about Brazilian marine biodiversity brings researchers from 5 countries together
8. Researchers identify how bone-marrow stem cells hold their breath in low-oxygen environments
9. Bochums researchers discover proton diode
10. U-M researchers receive largest single collection of psoriasis DNA samples
11. Researchers analyze the environmentalists paradox
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/16/2014)... Schizophrenia is associated with increased rates and intensity of ... that the relationship between schizophrenia and smoking stems, in ... to self-medicate symptoms and cognitive impairment associated with the ... issue of Biological Psychiatry , sheds light on ... nicotine receptors in the brain was lower in schizophrenia ...
(Date:9/16/2014)... What motivates consumers to make ethical choices such as ... more money on fair-trade coffee, and bringing their own ... study in the Journal of Consumer Research , ... to turn their emotions about unethical practices into action. ... consider the environmental and human costs of the products ...
(Date:9/16/2014)... RALEIGH, N.C. , Sept. 16, 2014  Valencell, ... has been chosen as one of 18 "Showcase Companies" ... technology businesses at the annual CED Tech Venture Conference ... Raleigh Convention Center in Raleigh, ... LeBoeuf will lead a discussion during the "Digital ...
Breaking Biology News(10 mins):Smoking and schizophrenia linked by alterations in brain nicotine signals 2Why are consumers willing to spend more money on ethical products? 2Valencell, Inc. Selected as 'Showcase Company' at CED Tech Venture Conference 2014 2
... to help stem the global HIV epidemic is to ... the drug tenofovir) before they have high risk sex ... infected, an approach called "pre-exposure prophylaxis" (PREP). But activist ... at least two important clinical trials of tenofovir as ...
... have pinpointed circuitry in the brains of monkeys that ... Their findings -- gained from experiments in which they ... juice rewards -- could give insights into why humans ... drug use and overeating. , The researchers, Michael Platt ...
... fruit fly have found a family of proteins that enhances ... trigger abnormal growth and cancer. Their discovery could lead to ... development of new drugs to stop uncontrolled growth in a ... University of Oxford, funded in part by the Biotechnology and ...
Cached Biology News:Why were the HIV prevention trials in commercial sex workers abandoned? 2Gambling monkeys give insight into neural machinery of risk 2Gambling monkeys give insight into neural machinery of risk 3Gambling monkeys give insight into neural machinery of risk 4Fruit fly studies open new window on cancer research 2
(Date:9/17/2014)... 2014 Hussey Copper , a leader ... antimicrobial copper, announces Gilmour Academy Ice Arena,s conversion of ... antimicrobial solid touch surface to help protect against bacteria.  ... surface that kills greater than 99.9% of MRSA, E-coli ... , Innovative ...
(Date:9/17/2014)... , Sept. 17, 2014 Veracyte, ... diagnostics company pioneering the field of molecular cytology, today ... operating officer. Mr. Hall joined Veracyte in ... commercial entry into endocrinology. Since 2012, he has led ... as managed care and billing functions. As chief operating ...
(Date:9/17/2014)... 2014 Beckman Coulter , a ... healthcare, has renewed its agreement with Personify ... the agreement, Personify will continue to streamline the Beckman ... recruitment analytics, including time-to-fill, time-to-source and a deep reduction ... with Personify was based on the success of our ...
(Date:9/17/2014)... NASA’s MESSENGER has just celebrated its 10 year ... have one of its latch valves, V27200-818, operating onboard ... investigation of the planet Mercury. It is only the ... provided a vast amount of information and images of ... utilize solenoids that also include permanent magnets to maintain ...
Breaking Biology Technology:Innovative Gilmour Academy Ice Arena changes more than 200 fixtures to Hussey Copper's MD-Cu29 antimicrobial copper to help protect against bacteria 2Innovative Gilmour Academy Ice Arena changes more than 200 fixtures to Hussey Copper's MD-Cu29 antimicrobial copper to help protect against bacteria 3Veracyte, Inc. Announces Promotion of Christopher M. Hall To Chief Operating Officer 2Veracyte, Inc. Announces Promotion of Christopher M. Hall To Chief Operating Officer 3Veracyte, Inc. Announces Promotion of Christopher M. Hall To Chief Operating Officer 4Beckman Coulter Signs 3-year RPO Contract with Personify 2Beckman Coulter Signs 3-year RPO Contract with Personify 3
... mounting that genetic factors play an important role in many ... 2, 2011, online in the Journal of Neuroscience , ... Switzerland report a new mammalian model for studying a specific ... to new drugs to fight the malady. , "This is ...
... Professor of Physics and Engineering Physics at Stevens Institute ... Foundation (NSF) with the prestigious CAREER Award. One of ... CAREER Award supports early career development of faculty in ... researchers and teachers. The awards provide a financial stipend ...
... Vanda Pharmaceuticals Inc. (Vanda) (Nasdaq: VNDA ... commercialization of products for central nervous system disorders, today ... of 2010, on Thursday, February 10, 2011, before the ... will be disseminated at that time. Mihael ...
Cached Biology Technology:A new model for studying Parkinson's 2Dr. Stefan Strauf of physics at Stevens receives NSF CAREER Award for quantum research 2Dr. Stefan Strauf of physics at Stevens receives NSF CAREER Award for quantum research 3Vanda Pharmaceuticals to Announce Fourth Quarter 2010 Financial Results on February 10, 2011 2
... 2D is an automated, two-dimensional fractionation system ... Part of Beckman Coulters ProteomeLab family ... in just hours. The system effectively ... cell lysates, addressing a key challenge in ...
... cDNA Library Panels were designed for full-length ... of PCRs to identify the desired cDNA ... in a 96-well "Master Plate," where each ... Having identified the positive well(s) by gel ...
... Jobin Yvons Protein 295 ex can measure ... sample in only a few minutes. To ... acids tyrosine and tryptophan, the Protein 295 ... a pulsed diode emitting 295 nm. Fluorescence ...
... is a research grade spectrofluorometer which offers ... speeds of up to 60,000nm/min. Its ... concentrated light beam along with low sample ... FL Solutions, PC fluorescence applications software, which ...
Biology Products: