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. LasikPlusĀ® 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:7/10/2014)... new study published today in the journal PNAS ... found that time of day and sleep deprivation have ... be crucial when looking at the best time of ... heart disease, and for administering medicines effectively. , Researchers ... Cancer Research, London, investigated the links between sleep deprivation, ...
(Date:7/10/2014)... out for crude 3-D glasses, polarized glasses, and ... basic devices, used to trick the brain into ... rendered obsolete with the introduction of new holography ... TAU doctoral students Yuval Yifat, Michal Eitan, and ... on nanoantennas that could be used for security ...
(Date:1/15/2014)...  Bill Jacobs Automotive, a group of car dealerships headquartered in ... Heartland Blood Center and offering free oil change coupons for ... Saturday, Jan. 18 at the Bill Jacobs Cadillac and Chevrolet ... http://photos.prnewswire.com/prnh/20140115/MN46637 )  The Bill Jacobs Auto ...
(Date:1/15/2014)... OXFORD, England and SAN JOSE, California ... an international biotechnology company developing antibody-drug conjugates for cancer, today ... its Board of Directors. Dr Reynolds has over 20 years, ... Chief Medical Officer at Seattle Genetics. "I am ...
Breaking Biology Technology:Time of day crucial to accurately test for diseases, new research finds 2Projecting a 3-dimensional future 2Projecting a 3-dimensional future 3Join the Bill Jacobs Auto blood drive and receive a free oil change 2Oxford BioTherapeutics Appoints Thomas C Reynolds MD, PhD to its Board of Directors 2Oxford BioTherapeutics Appoints Thomas C Reynolds MD, PhD to its Board of Directors 3
... Purpose , ... of protease inhibitor (PI) and non-nucleoside reverse transcriptase inhibitor (NNRTI) ... of assessing inter-individual and intra-individual metabolism variability. To be of ... to monitor these drugs is fast and easy to perform, ...
... Introduction , ... products are radioactively labeled using either endlabeled primers or ... Successful sequencing results produced by these two labeling methods ... breaks, impurities or high secondary structure can cause DNA ...
... , Researchers and forensic agencies that test samples or ... These assays suffer from a number of limitations: , ... not as commonly available for novel sample matrices such as saliva as they are for ... be relatively costly due to the high volume of reagents used. , ...
Cached Biology Technology:A simple and rapid LC-MS/MS method for the simultaneous determination of nine antiretroviral drugs commonly used in Europe (protease Inhibitors and non-nucleoside reverse transcriptase inhibitors) 2A simple and rapid LC-MS/MS method for the simultaneous determination of nine antiretroviral drugs commonly used in Europe (protease Inhibitors and non-nucleoside reverse transcriptase inhibitors) 3A simple and rapid LC-MS/MS method for the simultaneous determination of nine antiretroviral drugs commonly used in Europe (protease Inhibitors and non-nucleoside reverse transcriptase inhibitors) 4A simple method to sequence from bacterial colonies using [a-33P] radiolabeled ddNTPs and Thermo Sequenase 2A simple method to sequence from bacterial colonies using [a-33P] radiolabeled ddNTPs and Thermo Sequenase 3Simultaneous Screening of 23 Drugs of Abuse in Oral Fluid Using an LC/MS/MS Method 2Simultaneous Screening of 23 Drugs of Abuse in Oral Fluid Using an LC/MS/MS Method 3Simultaneous Screening of 23 Drugs of Abuse in Oral Fluid Using an LC/MS/MS Method 4
(Date:7/10/2014)... known as heme enzymes, due to the presence of ... centre of the heme cofactor is an iron (Fe) ... is in an intermediate state called Compound I. The ... this oxidation involves just an oxygen atom (O), or ... implications for understanding oxidative processes within living cells, which ...
(Date:7/10/2014)... HOUSTON (July 10, 2014) New research from ... (UTHealth) shows that It,s Your GameKeep it Real (IYG), ... and promote healthy dating relationships, can significantly reduce dating ... Centers for Disease Control and Prevention, 10 percent of ... and other studies suggest that more than 20 percent ...
(Date:7/10/2014)... Spanish National Cancer Research Centre (CNIO) Macromolecular Crystallography ... a protein called BuD to DNA in order ... Montoya, the researcher who led the study, says ... edit the instructions contained in the genome to ... The study is published in the journal ...
Breaking Biology News(10 mins):Neutron crystallography solves long-standing biological mystery 2Neutron crystallography solves long-standing biological mystery 3It's Your Game ... Keep It Real reduces dating violence among minority youth 2CNIO scientists develop technology to redirect proteins towards specific areas of the genome 2
... Varanus komodoensis ) are known to bite prey and release ... the victims are reported to go into shock before the ... prey are killed by pathogenic bacteria in the dragons, mouths ... of Proceedings of the National Academy of Sciences ...
... active site found in a naturally occurring enzyme, chemists at ... like nature,s most pervasive hydrogen processor. , The researchers describe ... Journal of the American Chemical Society , and posted ... puzzled by nature,s ability to use cheap and plentiful building ...
... million cases of malaria are diagnosed each year mostly ... treat malaria do exist, the demand for new treatments ... have developed a resistance to existing medications. Now, ... have discovered one way to stop malaria parasite growth, ...
Cached Biology News:Komodo even more deadly than thought: Research 2New lead on malaria treatment 2
HyPro 20 system for slide hybridization. 20 slide capacity. Active vibration system, slide rack and humidity chamber. Ideal for microarray and in situ hybridization....
... PBL's bioassays for interferons are cytopathic effect inhibition ... Sample types include; tissue culture supernatents; serum ... these assays, one unit is defined as the ... the cytopathic effect of viral infection by 50%. ...
Request Info...
Request Info...
Biology Products: