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:12/17/2014)... 2014 The Defense Logistics Agency is insourcing its ... counterfeit microcircuits from entering into its supply chain. ... anti-counterfeit initiative dubbed DNA marking. The capability will validate ... throughout the supply chain. The new quality control measures ...
(Date:12/17/2014)... Valencell, a leader in performance biometric data sensor technology, ... such as Intel, Jabra, Atlas, and Scosche to develop ... products will be showcased at CES 2015, taking place ... "Our partners choose PerformTek biometrics, because ...
(Date:12/17/2014)... is fundamentally transforming the travel experience and nowhere is ... past decade, ePassports, biometric readers, and secure document scanners ... control via eGates and Automated Passport Control (APC) Kiosks ... borders across the globe. According to ...
Breaking Biology News(10 mins):Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 2Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 3Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 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 2
... in the international conservation journal Oryx ... reintroduction of captive lions do little to further the conservation ... Online, on July 31, ,Walking with lions: Why there is ... species restoration, was authored by a blue-ribbon panel of lion ...
... cancer from one tissue to another may one day be ... print issue of The FASEB Journal ( http://www.fasebj.org ... on fruit flies) increases the "stickiness" that causes cells, including ... slows their movement throughout the body. "The study of ...
... the body are injured at their farthest reaches, coordinating the ... because these peripheral nerve cells can be extremely long ... a lot of distance for a molecular distress signal to ... cell,s nucleus. Scientists have believed this process to be ...
Cached Biology News:Report: Captive lion reintroduction programs in Africa operate under 'conservation myth' 2Report: Captive lion reintroduction programs in Africa operate under 'conservation myth' 3Long-distance distress signal from periphery of injured nerve cells begins with locally made protein 2Long-distance distress signal from periphery of injured nerve cells begins with locally made protein 3
(Date:1/23/2015)... January 23, 2015 Portal Solutions , ... workplaces on Microsoft Office 365 and SharePoint platforms , ... Award program for being one of the region’s fastest-growing mid-sized ... employee growth. , “To be recognized a second year ...
(Date:1/22/2015)... , Jan. 22, 2015  Transwestern | RBJ today announces the ... office space for Shire a leading biopharmaceutical company, at Two ... | RBJ,s Robert Richards , president, and Brian ... for the entire five-floor building at 95 Hayden Ave. ...
(Date:1/22/2015)... 22, 2015 Pipette.com has added the ... their comprehensive portfolio of Eppendorf products. , The Eppendorf ... a Centrifuge 5424/5424 R and receive the following:, ... Research plus or Eppendorf Reference 2 , ...
(Date:1/22/2015)... NJ (PRWEB) January 22, 2015 ... technologies such as the Bioruptor® and complete solutions ... system for chromatin immunoprecipitation, alleviating the need for ... and controls needed for ChIP of histones or ...
Breaking Biology Technology:Washington SmartCEO Announces Portal Solutions as 2015 Future 50 Award Winner Second Year in a Row 2Washington SmartCEO Announces Portal Solutions as 2015 Future 50 Award Winner Second Year in a Row 3Transwestern?RBJ Advises Shire in 202,000 SF Lease, Creating Boston's Largest Suburban Biotech Campus 2Eppendorf Announces Promotional Bundle Which Includes: Eppendorf Centrifuge 5424, 3-Pack of Pipettes, and Tips - Available Now at Pipette.com 2Diagenode Launches Unique Semi-Automated Solution for Chromatin Immunoprecipitation 2
... 13 ADVENTRX Pharmaceuticals,Inc. (Amex: ANX ... on commercializing proprietary product candidates for the ... that Evan M. Levine,ADVENTRX,s chief executive officer, ... Fifth Annual Growth Conference on Wednesday,September 19th, ...
... ... to inhibit ... 13, 9:45 a.m. EDT at ... http://www.isispharm.com , CARLSBAD, Calif., Sept. 13 Isis,Pharmaceuticals, Inc. (Nasdaq: ISIS ...
... VANCOUVER, Sept. 13 /PRNewswire-FirstCall/ - Angiotech Pharmaceuticals,Inc. ... today that it received a,favourable decision from ... an attempt by Johnson & Johnson,s subsidiary, ... Zealand Patent 523799, which,pertains to compositions comprising ...
Cached Biology Technology:ADVENTRX Pharmaceuticals to Present at the ThinkEquity Partners' Fifth Annual Growth Conference 2Isis Enters Broad Collaboration With Ortho-McNeil, Inc. for the Discovery, Development and Commercialization of Antisense Drugs to Treat Metabolic Diseases 2Isis Enters Broad Collaboration With Ortho-McNeil, Inc. for the Discovery, Development and Commercialization of Antisense Drugs to Treat Metabolic Diseases 3Isis Enters Broad Collaboration With Ortho-McNeil, Inc. for the Discovery, Development and Commercialization of Antisense Drugs to Treat Metabolic Diseases 4Isis Enters Broad Collaboration With Ortho-McNeil, Inc. for the Discovery, Development and Commercialization of Antisense Drugs to Treat Metabolic Diseases 5Angiotech receives favourable patent decision from New Zealand's Intellectual Property Office 2Angiotech receives favourable patent decision from New Zealand's Intellectual Property Office 3Angiotech receives favourable patent decision from New Zealand's Intellectual Property Office 4
... Todays advanced protein cross-linking techniques are defined ... Dr. Shan S. Wong. This valuable hardcover ... schemes and current application references. More than ... protein cross-linking and conjugate preparation from ...
... active ingredient in Molecular Probes. SlowFadeAntifade ... to act as a free radical ... Our original SlowFade formulation (S-2828) was ... of fluorescein to almost zero (Figure ...
b6-2A12...
... kit are prepared with pure chemicals according ... Isolation Kit is designed to isolating intact ... easy way. One kit is consisted of ... mitochondria from 10 20 g tissue ...
Biology Products: