Navigation Links
Researchers create method for more sensitive electrochemical sensors
Date:1/17/2013

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.

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.


'/>"/>
Contact: Megan Fellman
fellman@northwestern.edu
847-491-3115
Northwestern University
Source:Eurekalert

Related biology technology :

1. Sustainable Valley Technology Group Provides Technology Innovation Grant To Help Researchers & Start-Ups With Funding, Business Support, Equipment & Facilities
2. Penn researchers show new level of control over liquid crystals
3. Carin Grings remains identified by researchers at Uppsala University
4. MIT researchers discover a new kind of magnetism
5. Elsevier and the Dutch Fulbright Center Start Collaboration to Support Early Career Researchers in the Netherlands
6. Penn researchers make flexible, low-voltage circuits using nanocrystals
7. Researchers improve technology to detect hazardous chemicals
8. Researchers create laser the size of a virus particle
9. Taming mavericks: Stanford researchers use synthetic magnetism to control light
10. Promotion of Young Researchers Supported by Major Donation
11. Penn researchers make first all-optical nanowire switch
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/8/2016)... CARDIFF, UK (PRWEB) , ... December 08, 2016 ... ... high precision light to control cells — optogenetics — is key to exciting ... state of the art, spatially patterned light projected via free-space optics stimulates small, ...
(Date:12/8/2016)... , Dec. 8, 2016  Anaconda BioMed S.L., a ... of the next generation neuro-thrombectomy system for the treatment ... Tudor G. Jovin, MD to join its Scientific Advisory ... a strategic network of scientific and clinical experts to ... of the ANCD BRAIN ® to its clinical ...
(Date:12/8/2016)... ... 08, 2016 , ... This CAST literature review and report looks at problems ... on the economic effects in countries that are major global commodity exporters and importers, ... resultant risk of low level presence (LLP) puts large volumes of trade worth billions ...
(Date:12/8/2016)... , Dec. 8, 2016 Savannah River ... technologies and selected NewTechBio,s NT-MAX Lake & ... based beneficial bacteria, in conjunction with Hexa Armor/ ... deficiencies with National Pollutant Discharge Elimination System requirements. ... experienced a steady history of elevated pH levels, ...
Breaking Biology Technology:
(Date:6/22/2016)... , June 22, 2016   ... management and verification solutions, has partnered with ... software solutions for Visitor Management, Self-Service Kiosks ... provides products that add functional enhancements to ... provides corporations and venues with an automated ...
(Date:6/21/2016)... British Columbia , June 21, 2016 /PRNewswire/ ... appointed to the new role of principal product ... been named the director of customer development. Both ... NuData,s chief technical officer. The moves reflect NuData,s ... teams in response to high customer demand and ...
(Date:6/16/2016)... , June 16, 2016 ... size is expected to reach USD 1.83 billion ... Grand View Research, Inc. Technological proliferation and increasing ... applications are expected to drive the market growth. ... , The development of advanced multimodal ...
Breaking Biology News(10 mins):