Navigation Links
Penn research advances understanding of lead selenide nanowires
Date:4/8/2011

n and analysis, they kept the nanowires clean, allowing them to discover the unique properties of these lead selenide nanomaterials.

Researchers designed experiments allowing them to separate the influence of the metal "wiring" on the motion of electrons and holes from that of the behavior intrinsic to the lead selenide nanowires. By controlling the exposure of the semiconductor nanowire device to oxygen or the chemical hydrazine, they were able to change the conductive properties between p-type and n-type. Altering the duration and concentration of the exposure, the nanowire device type could be flipped back and forth.

"If you expose the surfaces of these structures, which are unique to nanoscale materials, you can make them p-type, you can make them n-type, and you can make them somewhere in between, where it can conduct both electrons and holes," Kagan said. "This is what we call 'ambipolar.'"

Devices combining one n-type and one p-type semiconductor are used in many high-tech applications, ranging from the circuits of everyday electronics, to solar cells and thermoelectrics, which can convert heat into electricity.

"Thinking about how we can build these things and take advantage of the characteristics of nanoscale materials is really what this new understanding allows," Kagan said.

Figuring out the characteristics of nanoscale materials and their behavior in device structures are the first steps in looking forward to their applications.

These lead selenide nanowires are attractive because they may be synthesized by low-cost methods in large quantities.

"Compared to the big machinery you need to make other semiconductor devices, it's significantly cheaper," Kagan said. "It doesn't look much more complicated than the hoods people would recognize from when they had to take chemistry lab."

In addition to the low cost, the manufacturing process for lead selenide nanowires is relatively easy and c
'/>"/>

Contact: Evan Lerner
elerner@upenn.edu
215-573-6604
University of Pennsylvania
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Zacharon Pharmaceuticals Announces Research and Development Collaboration With Pfizer to Develop Drugs for Multiple Rare Disorders
2. Caliper Announces New Oncology Research Collaboration
3. Nanocrystal doping developed by Hebrew University researchers enhances semiconductor nanocrystals
4. Generex Announces Publication of Comparative Peptide Vaccine Studies in Peer Review Journal Demonstrating Superiority of AE37 and Presentation at the American Association for Cancer Research
5. New Research Holds Promise for Gene Engineering and Therapy
6. TGen and Scottsdale Healthcare researchers discover microRNA role in brain metastasis
7. Transgenomic, Inc. Presentations to Describe High-Sensitivity Detection of Cancer Biomarkers at the 2011 American Association for Cancer Research Meeting
8. Carnegie Mellon researchers electrify polymerization
9. LasikPlus® Research Reveals Excellent Results From Modern LASIK
10. Stanford researchers use river water and salty ocean water to generate electricity
11. Marshall Edwards to Report new Data on Mitochondrial Inhibitor Program at American Association for Cancer Research Annual Meeting
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/30/2014)... 2014 Lyme Research Alliance ... disease research at universities, today announced the awarding of ... identification, treatment and cure for Lyme and other tick-borne ... most applications in its history—over 20 grant proposals—a 100 ... were pleased to receive so many solid applications from ...
(Date:9/30/2014)... On September 11, Pharma IQ conducted an ... of a session that he will lead on “Stem Cells” ... February 17-18, 2015 in London. In the interview posted ... Sherley to respond to several questions on the current state ... stem cell toxicity, and future trends in the use of ...
(Date:9/30/2014)... 30, 2014 Back in the 1970’s, many ... feet. per employee, which included space for circulation and file ... Jeff Howell, partner at Nidea Corporate Real Estate / ... “By the year 2000, however, 250 square feet per ... number come down to 175 to 225 square feet, and ...
(Date:9/29/2014)... forefront of diagnostics today, with imaging techniques like ... and NMR (nuclear magnetic resonance) increasing steeply over ... image resolution and quality still limit these techniques ... solution is hyperpolarization, which involves injecting the patient ... following the distribution and fate of specific molecules ...
Breaking Biology Technology:Lyme Research Alliance Awards Nearly $600,000 in New Grants 2Lyme Research Alliance Awards Nearly $600,000 in New Grants 3Lyme Research Alliance Awards Nearly $600,000 in New Grants 4Adult Stem Cell Technology Center, LLC Director James L. Sherley Discusses Stem Cell Toxicology 2Adult Stem Cell Technology Center, LLC Director James L. Sherley Discusses Stem Cell Toxicology 3Adult Stem Cell Technology Center, LLC Director James L. Sherley Discusses Stem Cell Toxicology 4ITRA Global Reports on How Companies Are Squeezing More Employees into Less Office Space 2ITRA Global Reports on How Companies Are Squeezing More Employees into Less Office Space 3A safer approach for diagnostic medical imaging 2A safer approach for diagnostic medical imaging 3
... thoughts, new processes, and new innovations, but the term The ... old worn-out phase used in Silicon Valley in the late ... corruption as well as cute, but not profitable or sustainable ... in a Real-Time Economy, in which some of Wisconsins businesses ...
... MILWAUKEE,WI.-Beware calling the next strange idea you hear strange: ... millionaire next door. , ,A panel of experienced ... Conference in Milwaukee last Wednesday have dealt with looks ... their brethren in the audience to accept the whispers ...
... different look and feel as traditionalists (b. 1925 1942) ... the workforce, by choice or not. Employers will be facing ... unfilled jobs combined with a shortage of young talent to ... educate, attract, grow and retain talent. Companies will be faced ...
Cached Biology Technology:Wisconsins Real-Time" Economy 2Wisconsins Real-Time" Economy 3Wisconsins Real-Time" Economy 4Lowering the fear factor for entrepreneurs, intra-preneurs 2Lowering the fear factor for entrepreneurs, intra-preneurs 3The ON* is on the Employer 2
(Date:9/30/2014)... comes to using marijuana, new research, involving mice and ... Journal of Leukocyte Biology , suggests that ... you should. That,s because a team of Italian scientists ... serious long-term damage to the immune system. This damage ... such as multiple sclerosis, inflammatory bowel disease and rheumatoid ...
(Date:9/30/2014)... available in German . ... response to risky situations such as exposure to predators. ... found in a long-term study on different populations of ... rate and ambient temperature. High metabolic rates and low ... these scenarios birds were more likely to approach potential ...
(Date:9/30/2014)... -- Winners of The Economist,s prestigious Innovation awards 2014 ... place at the JW Marriott Hong Kong on Friday, October 10 ... their experiences and the lessons those hold for others. The awards, ... the past decade, will be presented at a ceremony in ... will be the first time the ceremony has come to ...
Breaking Biology News(10 mins):Adolescent exposure to thc may cause immune systems to go up in smoke 2Risky metabolism 2Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 2Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 3Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 4Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 5Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 6Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 7
... CSIRO and the Global Carbon Project, and Dr Michael ... of carbon dioxide (CO2) absorbed annually by the world,s ... worth hundreds of billions of dollars. However, concerns ... quantifying changes in the size of those stocks, and ...
... a remote British Columbia site is the first ever ... species, according to a recent examination by a University ... the Sustut Basin of north-central British Columbia 37 years ... old, were tucked away until being donated to Dalhousie ...
... may not rival the artistry of glassblowers in Europe ... Standards and Technology (NIST) and Cornell University have found ... creates nanoscale (billionth of a meter) fluidic devices used ... DNA strands. The novel method is described in a ...
Cached Biology News:Tropical forest sustainability: A climate change boon 2'Nanoglassblowing' seen as boon to study of individual molecules 2
...
...
... are predominantly used for labeling proteins, the ... peptides and nucleotides because they give better ... required in the conjugation processes. 5-TAMRA is ... peptides and proteins. 6-TAMRA is predominately used ...
Rabbit polyclonal to GPCR G2A ( Abpromise for all tested applications). entrezGeneID: 29933 SwissProtID: Q9UNW8...
Biology Products: