Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Researchers Create Method for More Sensitive Electrochemical Sensors: Findings could open up a new class of technologies with applications in medicine, chemistry, and engineering.

Vinayak Dravid
Vinayak Dravid

Abstract:
Graphene and related materials hold promise for the future of electrochemical sensors detectors that measure the concentration of oxygen, toxic gases, and other substances but many applications require greater sensitivity at lower detection ranges than scientists have been able to achieve.

Researchers Create Method for More Sensitive Electrochemical Sensors: Findings could open up a new class of technologies with applications in medicine, chemistry, and engineering.

Chicago, IL and India | Posted on January 17th, 2013

A Northwestern University research team and partners in India have recently developed a new method for amplifying signals in graphene oxide-based electrochemical sensors through a process called "magneto-electrochemical immunoassay." The findings could open up a new class of technologies with applications in medicine, chemistry, and engineering.

Researchers from Northwestern's McCormick School of Engineering and Applied Science, the Northwestern International Institute for Nanotechnology (IIN), the Northwestern University Atomic and Nanoscale Characterization Experimental (NUANCE) Center, and the Institute for Microbial Technology (IMTECH)-India, a national laboratory of India, contributed to the research.

A paper about the work, "Enhancing Electrochemical Detection on Graphene Oxide-CNT Nanostructured Electrodes Using Magneto-Nanobioprobes," was published November 19 in Nature Scientific Reports.

Graphene-based nanocomposite films have recently been used as an effective sensing platform for the development of electrochemical sensors and biosensors because of their unique facile surface modification characteristics and high charge mobility.

The researchers' new concept combines the advantages carbon nanotubes and reduced graphene oxide together with electrochemical bursting of magnetic gold nanoparticles into a large number of metal ions.

High sensitivity was achieved by precisely designing the nanohybrid and correlating the available metal ions with analyte concentration. The researchers used tiny magnetic particles encapsulated in inert coating of silicon dioxide to make core-shell nanostructures with favorable magnetic properties of metallic iron while preventing them from oxidation or significant degradation. They were then coated with gold because of its chemical inertness and biocompatibility.

This novel immune-detection platform shows potential for rapid and sensitive screening of environmental pollutants or toxins in samples. Researchers reported the ultrahigh sensitivity of this method for a new generation of herbicide diuron and its analogues up to sub-picomolar concentration in standard water samples. The process also proved to be efficient and cost-effective: tens of thousands of screen-printed electrodes can be manufactured quite readily with low cost for such hybrid assay.

The paper's authors included Vinayak Dravid, professor of materials science and engineering at Northwestern, a founding member of IIN, and director of the NUANCE Center; Gajendera Shekhawat, research associate professor of materials science and engineering at Northwestern; Jinsong Wu, research assistant professor of materials science and engineering at Northwestern; and lead author Priyanka Sharma, Vijayender Bhalla, E. Senthil Prasad, and C. Raman Suri, all of the Institute of Microbial Technology, India.

The National Science Foundation NSF-IREE, NSF-ECCS, and NSF-OISE grant supported this work, with partial support from NIH CCNE program at Northwestern.

####

For more information, please click here

Contacts:
Megan Fellman

847-491-3115
Northwestern University

Copyright © Northwestern University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

Graphene

Researchers Make Magnetic Graphene: UC Riverside research could lead to new multi-functional electronic devices January 27th, 2015

News and information

Carbon nanoballs can greatly contribute to sustainable energy supply January 27th, 2015

The laser pulse that gets shorter all by itself: Ultrashort laser pulses have become an indispensable tool for atomic and molecular research; A new technology makes creating short infrared pulses easy and cheap January 27th, 2015

New pathway to valleytronics January 27th, 2015

Stomach acid-powered micromotors get their first test in a living animal January 27th, 2015

Chemistry

Anti-microbial coatings with a long-term effect for surfaces presentation at nano tech 2015 in Japan January 21st, 2015

Hydrogels deliver on blood-vessel growth: Rice researchers introduce improved injectable scaffold to promote healing January 20th, 2015

Graphene enables all-electrical control of energy flow from light emitters: First signatures of graphene plasmons at telecommunications wavelength revealed January 20th, 2015

Nanotechnology Used to Produce Ceramic Membrane with High Thermal Stability January 19th, 2015

Govt.-Legislation/Regulation/Funding/Policy

Researchers Make Magnetic Graphene: UC Riverside research could lead to new multi-functional electronic devices January 27th, 2015

New pathway to valleytronics January 27th, 2015

Nanoshuttle wear and tear: It's the mileage, not the age January 26th, 2015

Visualizing interacting electrons in a molecule: Scientists at Aalto University and the University of Zurich have succeeded in directly imaging how electrons interact within a single molecule January 26th, 2015

Nanomedicine

Nanoliposomes Help Efforts to Cure Bacterial Infections January 27th, 2015

Stomach acid-powered micromotors get their first test in a living animal January 27th, 2015

Engineering self-assembling amyloid fibers January 26th, 2015

Promising use of nanodiamonds in delivering cancer drug to kill cancer stem cells: NUS study shows that delivery of Epirubicin by nanodiamonds resulted in a normally lethal dosage of Epirubicin becoming a safe and effective dosage for treatment of liver cancer January 26th, 2015

Sensors

Detection of Heavy Metals in Samples with Naked Eye January 26th, 2015

GS7 Graphene Sensor maybe Solution in Fight Against Cancer January 25th, 2015

Nanosensor Used for Simultaneous Determination of Effective Tea Components January 24th, 2015

Iranian Scientists Produce Graphene-Based Oxygen Sensor January 23rd, 2015

Discoveries

Carbon nanoballs can greatly contribute to sustainable energy supply January 27th, 2015

The laser pulse that gets shorter all by itself: Ultrashort laser pulses have become an indispensable tool for atomic and molecular research; A new technology makes creating short infrared pulses easy and cheap January 27th, 2015

New pathway to valleytronics January 27th, 2015

Stomach acid-powered micromotors get their first test in a living animal January 27th, 2015

Announcements

Industrial Nanotech, Inc. Announces New OEM Customer January 27th, 2015

Carbon nanoballs can greatly contribute to sustainable energy supply January 27th, 2015

The laser pulse that gets shorter all by itself: Ultrashort laser pulses have become an indispensable tool for atomic and molecular research; A new technology makes creating short infrared pulses easy and cheap January 27th, 2015

New pathway to valleytronics January 27th, 2015

Research partnerships

Carbon nanoballs can greatly contribute to sustainable energy supply January 27th, 2015

Visualizing interacting electrons in a molecule: Scientists at Aalto University and the University of Zurich have succeeded in directly imaging how electrons interact within a single molecule January 26th, 2015

Promising use of nanodiamonds in delivering cancer drug to kill cancer stem cells: NUS study shows that delivery of Epirubicin by nanodiamonds resulted in a normally lethal dosage of Epirubicin becoming a safe and effective dosage for treatment of liver cancer January 26th, 2015

Wearable sensor clears path to long-term EKG, EMG monitoring January 20th, 2015

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE