Navigation Links
Penn researchers develop biological circuit components, new microscope technique for measuring them
Date:6/8/2011

olds.

"It's necessary to understand these kinds of properties in the molecules in order to make devices out of them. We've been studying silicon for 40 years, so we know what happens to electrons there," Bonnell said. "We didn't know what happens to electrons on dry electrodes with these proteins; we didn't even know if they would remain photoactive when attached to an electrode."

Designing circuits and devices with silicon is inherently easier than with proteins. The electrical properties of a large chunk of a single element can be measured and then scaled down, but complex molecules like these proteins cannot be scaled up. Diagnostic systems that could measure their properties with nanometer sensitivity simply did not exist.

The researchers therefore needed to invent both a new way of a measuring these properties and a controlled way of making the photovoltaic proteins that would resemble how they might eventually be incorporated into devices in open-air, everyday environments, rather than swimming in a chemical solution.

To solve the first problem, the team developed a new kind of atomic force microscope technique, known as torsional resonance nanoimpedance microscopy. Atomic force microscopes operate by bringing an extremely narrow silicon tip very close to a surface and measuring how the tip reacts, providing a spatial sensitivity of a few nanometers down to individual atoms.

"What we've done in our version is to use a metallic tip and put an oscillating electric field on it. By seeing how electrons react to the field, we're able to measure more complex interactions and more complex properties, such as capacitance," Bonnell said.

Bohdana Discher's group designed the self-assembling proteins much as they had done before but took the additional step of stamping them onto sheets of graphite electrodes. This manufacturing principle and the ability to measure the resulting devices could have a variety of a
'/>"/>

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

Page: 1 2 3

Related biology news :

1. NC State researchers get to root of parasite genome
2. Researchers find animal with ability to survive climate change
3. Researchers find an essential gene for forming ears of corn
4. Researchers note differences between people and animals on calorie restriction
5. Researchers study acoustic communication in deep-sea fish
6. Researchers discover that growing up too fast may mean dying young in honey bees
7. Researchers study how pistachios may improve heart health
8. UI researchers find potentially toxic substance present in Chicago air
9. Researchers develop new self-training gene prediction program for fungi
10. Case Western Reserve University researchers track Chernobyl fallout
11. Childrens National researchers develop novel anti-tumor vaccine
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/19/2014)... sense of fairness did not evolve for the sake ... the benefits of continued cooperation, so say Frans de ... review article about inequity aversion (IA), which is defined ... is published in Science . , Their ... IA-related studies to address their hypothesis that it is ...
(Date:9/18/2014)... University researchers have developed a unique method to use ... in rural areas. , The first microbe-powered, self-sustaining ... quick way to clean up waste from large farming ... , Professor Haluk Beyenal and graduate student Timothy ... discuss the system in the online edition of ...
(Date:9/18/2014)... New research into the Crimean-Congo hemorrhagic fever virus (CCHFV), ... in humans similar to that caused by Ebolavirus, has ... discovery has the potential to lead to novel targets ... The research, reported in a paper published today in ... scientists at the Texas Biomedical Research Institute and their ...
Breaking Biology News(10 mins):Evolution of responses to (un)fairness 2Evolution of responses to (un)fairness 3Researchers develop unique waste cleanup for rural areas 2Research milestone in CCHF virus could help identify new treatments 2
... virus called cytomegalovirus (CMV), which most commonly affects people ... patients who have no immune-system problems, University of Washington ... longer hospital and intensive-care unit (ICU) stays independent of ... in JAMA , the Journal of the ...
... stem cells originate in a different part of the brain ... produce new brain cells to replace those lost to disease ... Evidence strongly shows that the true stem cells in ... ventricles in the brain and spinal cord, rather than cells ...
... In the life of a cell, the response to DNA damage ... commit suicide, or grow uncontrollably, a route leading to cancer. In ... Cell , scientists at NYU Langone Medical Center have identified a ... targets proteins for disposal. The finding points to a new pathway ...
Cached Biology News:CMV infections affect more than just patients with compromised immune systems, researchers find 2Adult stem cells activated in mammalian brain 2Adult stem cells activated in mammalian brain 3A new cellular pathway linked to cancer is identified by NYU researchers 2
(Date:9/18/2014)... /PRNewswire-iReach/ -- DeepResearchReports.com adds "2014 Deep Research Report ... "2014 Deep Research Report on Global and China ... Photo - http://photos.prnewswire.com/prnh/20140918/147058 ... and China Acetic Acid Industry" is a professional ... and Global Acetic Acid Market. The ...
(Date:9/18/2014)... Texas Governor Rick Perry, Texas ... Health Science Center CEO Brett Giroir, M.D., and ... Human Services (HHS), State of Texas and biopharmaceutical ... vaccine manufacturing facility in Bryan, Texas, which when ... Texas A&M Biocorridor – a rapidly evolving hub ...
(Date:9/18/2014)... , Sept. 18, 2014 Research and ... "Global Human Albumin Industry Report 2014" report to ... Industry Report 2014 is a professional and in-depth study ... industry. The report provides a basic overview ... chain structure. The human albumin market analysis is provided ...
(Date:9/18/2014)... Pharma, Inc. (Nasdaq: MEIP ), an oncology company ... announced today that Daniel P. Gold , Ph.D., President ... in the Biotech Industry conference on Friday, September 26, ... Hotel & Conference Center in New York ... at www.meipharma.com . A replay will be available approximately ...
Breaking Biology Technology:Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 2Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 3Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 4Texas A&M Dedicates National Pandemic Influenza Vaccine Manufacturing Facility, on Track for 2016 Start-Up Phase 2Texas A&M Dedicates National Pandemic Influenza Vaccine Manufacturing Facility, on Track for 2016 Start-Up Phase 3Texas A&M Dedicates National Pandemic Influenza Vaccine Manufacturing Facility, on Track for 2016 Start-Up Phase 4Global Human Albumin Industry Report 2014 2Global Human Albumin Industry Report 2014 3MEI Pharma To Present At BioCentury's NewsMakers Conference 2MEI Pharma To Present At BioCentury's NewsMakers Conference 3
... , , , ... NBIX ) announced today that the Company will report its second ... July 29, 2009. Neurocrine will then host a live conference ... update Thursday morning, July 30, 2009 at 8:30 a.m. Eastern Daylight Time ...
... , , , ... Group , , NEW ... non-invasive molecular oncology diagnostics to aid in early cancer detection ... named Chief Operating Officer. As COO, Zdechlik will be ...
... ... the keynote address , ... Parsipany, NJ (PRWEB) July 22, 2009 -- Vistaar Technologies, Inc. Vistaar ... announced the company will partner with the Professional Pricing Society (PPS), the world,s only ...
Cached Biology Technology:Neurocrine Biosciences Announces Conference Call and Webcast to Present Second Quarter 2009 Financial Results 2Exosome Diagnostics Appoints Former Roche Executive Greg Zdechlik as Chief Operating Officer 2Vistaar and the Professional Pricing Society Partner to Present Premier Symposium for Pricing Practitioners 2Vistaar and the Professional Pricing Society Partner to Present Premier Symposium for Pricing Practitioners 3
RayBio Human Atherosclerosis Antibody Array 1.1 (4) with Accessory, detects 40 inflammatory factors (for lysate) Class: Antibody Array Products Product Group: Antibody Array...
Catch and Release® v2.0 Reversible Immunoprecipitation System...
... Peptide-Protein Conjugation, Quantities ... Complex Peptides/Peptidomimetics, Special amino ... Structures, Peptide labeling AMC, aldehyde, ... fitting your needs, Chromogenic/Flurogenic Substrates, ...
5-bromouridine 5'-triphosphate (BrUTP) *10 mM in TE buffer*...
Biology Products: