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:1/22/2015)... BOSTON , Jan. 22, 2015  Transwestern | RBJ today ... feet of office space for Shire a leading biopharmaceutical company, ... . Transwestern | RBJ,s Robert Richards , president, and ... the lease for the entire five-floor building at 95 Hayden ...
(Date:1/22/2015)... The laboratory information management systems market ... number of technological advancements due to factors such as ... to integrate healthcare systems, and increasing government support for ... integration. Key players in the market focus on technological ...
(Date:1/22/2015)... zFlo Motion , a US leader in biomechanics software ... a new partner. STT-Systems has developed an impressive ... with offerings in the optical-motion capture, 3D scanning, and industrial ... unit), iSen, is opening eyes around the world. With no ...
(Date:1/22/2015)... 22, 2015 Diagenode, Inc., a ... the Bioruptor® and complete solutions for epigenetics research, ... immunoprecipitation, alleviating the need for manual processing. The ... for ChIP of histones or transcription factors and ...
Breaking Biology Technology:Transwestern | RBJ Advises Shire in 202,000 SF Lease, Creating Boston's Largest Suburban Biotech Campus 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 3Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 43D Motion Capture Just Got Easy 2Diagenode Launches Unique Semi-Automated Solution for Chromatin Immunoprecipitation 2
... SINGAPORE, Oct. 24 Codexis, Inc., a private,biotechnology ... announced the opening of Codexis Laboratories Singapore,Pte. Ltd. ... in Asia, and,is an expansion of the company,s ... CLS will support the company,s pharmaceuticals business in,both ...
... can be used to create effective and powerful pressure ... Rensselaer Polytechnic Institute. , Taking advantage of the materials ... 3-millimeter nanotube block and discovered it was highly suitable ... how many times or how hard they squeezed the ...
... Sparta Systems, Inc. (Sparta),the maker of TrackWise(R), ... management software, announced that its TrackWise solution has,been ... focused,on the development, manufacturing and marketing of specialized ... CAPA and complaint handling,processes. TrackWise provides organizations ...
Cached Biology Technology:Codexis Opens Singapore Laboratory 2The sensitive side of carbon nanotubes: Creating powerful pressure sensors 2The sensitive side of carbon nanotubes: Creating powerful pressure sensors 3Protherics UK Ltd. Chooses TrackWise for Corrective Action and Preventive Action (CAPA) Management 2
(Date:12/17/2014)... , Dec. 15, 2014  HITLAB SM announced today ... to confirm its adherence to current U.S. Food and ... conduct regulated smart device and smart phone application trials ... quality. "HITLAB is determined to improve global ...
(Date:12/17/2014)... 2014  Automation is fundamentally transforming the travel experience and ... Over the past decade, ePassports, biometric readers, and secure ... through border control via eGates and Automated Passport Control ... and land borders across the globe. ...
(Date:12/11/2014)... 2014 Research and Markets , ... has announced the addition of the "Biometrics Market ... One major trend emerging in this market ... systems utilize more than one characteristic of an individual ...
Breaking Biology News(10 mins):HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2Automated Border Control (ABC) Transforms the Global Travel Experience With More Than 2500 ABC eGates and APC Kiosks Deployed In Airports, Seaports, and Land Borders Worldwide 2Biometrics Market in India 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... Harbor, N.Y. One way of regulating protein levels in ... These are intermediary molecules that are first copied from DNA ... then transported into the cell,s body to be translated into ... Spring Harbor Laboratory (CSHL) has now discovered that mRNAs can ...
... Without aggressive action to reduce soot emissions, the ... to be significantly accelerated in order to achieve international ... last December,s Copenhagen Accord, according to " Assessing the ... published online June 21 in the Proceedings of the ...
... the Danish Cancer Society and the Herlev University Hospital ... for multiple tumor markers in bladder cancer. The ... multiple short synthetic probes: application to methylation analysis of ... from patients with bladder cancer," appears in the July ...
Cached Biology News:Messenger RNAs are regulated in far more ways than previously appreciated, CSHL team finds 2Aggressive action to reduce soot emissions needed to meet climate change goals 2Aggressive action to reduce soot emissions needed to meet climate change goals 3New diagnostic test for bladder cancer 2
The external laser upgrade for the Molecular Imager FX adds a 635 nm external laser; the 555 nm long pass filter is replaced with a 605 nm band pass filter to distinguish Cy5 from 532 nm excitable dy...
... is designed for fast and easy purification ... and tissues. The bead beating technology used ... procedures such as CTAB, phenol, or chloroform ... is not necessary - purified DNA is ...
The filter 530DF28 for the Molecular Imager FX is a band pass filter for ECL Plus, AttoPhos, SYBR Green, Alexa Fluor 488, FITC, Cy2, and Pro-Q Emerald dyes....
... APO-DIRECT is a single-step staining method for ... by flow cytometry. The kit contains all ... in cells including: positive and negative control ... and rinsing buffers for processing individual steps ...
Biology Products: