Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > New biosensor monitors water quality

A fabricated electrode with a grown MWCNT array (CNT post fabricated at the UC Nanoworld Lab).
A fabricated electrode with a grown MWCNT array

(CNT post fabricated at the UC Nanoworld Lab).

Abstract:
Cyanobacterial harmful algal blooms frequently occur in drinking water sources around the world due to eutrophication as a result of antrophogenic activities. Their presence in water is a potential threat because some species of cyanobacteria can produce and release potent toxic compounds (cyanotoxins), such as hepatotoxins, neurotoxins, and dermatotoxins.

New biosensor monitors water quality

Germany | Posted on January 9th, 2013

Among hepatotoxins, microcystins (MCs) are the most frequently reported cyanotoxins and MC-LR is the most commonly occurring congener of MCs worldwide as well as in the USA. The World Health Organization (WHO) has proposed a provisional concentration limit of MC-LR in drinking water of 1 μg L-1. Therefore, there is a need for techniques to monitor MC-LR in various sources of water.

Recently, Prof. Dionysiou's group at the University of Cincinnati (UC) in the USA and his collaborators (UC and USEPA, Cincinnati, USA; and NCSR Demokritos, Athens, Greece) developed a multi-walled carbon nanotube (MWCNT)-based electrochemical biosensor to monitor MC-LR in sources of drinking water supplies.

They reported the formation of oxygen-containing functional groups on the MWCNT surface following electrochemical functionalization in alkaline solution. The performance of the MWCNT array biosensor demonstrated a marked increase of the electron-transfer resistance upon antibody conjugation. The biosensor's electron-transfer resistance showed a linear dependence on the MC-LR concentration ranging from 0.05 to 20 μg L-1. The sensing performance of the biosensor at low MC-LR concentration allows monitoring of this cyanotoxin well below the drinking water provisional concentration limit of 1 μg L-1.

####

For more information, please click here

Copyright © Wiley-VCH Materials Science Journals

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 Links

Link to the original paper on Wiley Online Library:

Related News Press

News and information

Liquid metal nano printing set to revolutionize electronics: Creating integrated circuits just atoms thick February 18th, 2017

Engineers shrink microscope to dime-sized device February 17th, 2017

Francis Alexander Named Deputy Director of Brookhaven Lab's Computational Science Initiative February 16th, 2017

Research opens door to smaller, cheaper, more agile communications tech February 16th, 2017

Nanotubes/Buckyballs/Fullerenes

Boron atoms stretch out, gain new powers: Rice University simulations demonstrate 1-D material's stiffness, electrical versatility January 26th, 2017

New stem cell technique shows promise for bone repair January 25th, 2017

Captured on video: DNA nanotubes build a bridge between 2 molecular posts: Research may lead to new lines of direct communication with cells January 9th, 2017

Nano-chimneys can cool circuits: Rice University scientists calculate tweaks to graphene would form phonon-friendly cones January 4th, 2017

Discoveries

Liquid metal nano printing set to revolutionize electronics: Creating integrated circuits just atoms thick February 18th, 2017

Engineers shrink microscope to dime-sized device February 17th, 2017

Research opens door to smaller, cheaper, more agile communications tech February 16th, 2017

Good vibrations help reveal molecular details: Rice University scientists combine disciplines to pinpoint small structures in unlabeled molecules February 15th, 2017

Announcements

Liquid metal nano printing set to revolutionize electronics: Creating integrated circuits just atoms thick February 18th, 2017

Engineers shrink microscope to dime-sized device February 17th, 2017

Francis Alexander Named Deputy Director of Brookhaven Lab's Computational Science Initiative February 16th, 2017

Research opens door to smaller, cheaper, more agile communications tech February 16th, 2017

Water

Nano-level lubricant tuning improves material for electronic devices and surface coatings February 11th, 2017

Tough aqua material for water purification: Decontamination of water with a robust and sustainable membrane assembled from 2 synergistically working components January 24th, 2017

Scientists have discovered a new state of matter for water January 2nd, 2017

PCATDES Starts Field Testing of Photocatalytic Reactors in South East Asia December 28th, 2016

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