Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Food, water safety provide new challenges for today's sensors

Abstract:
Sensors that work flawlessly in laboratory settings may stumble when it comes to performing in real-world conditions, according to researchers at the Department of Energy's Oak Ridge National Laboratory.

Food, water safety provide new challenges for today's sensors

Oak Ridge, TN | Posted on May 24th, 2012

These shortcomings are important as they relate to safeguarding the nation's food and water supplies, said Ali Passian, lead author of a Perspective paper published in ACS Nano. In their paper, titled "Critical Issues in Sensor Science to Aid Food and Water Safety," the researchers observe that while sensors are becoming increasingly sophisticated, little or no field testing has been reported.

"Although sensor researchers are keenly aware of the various issues challenging their particular technologies, outsiders may perceive an overestimated level of performance, or in certain cases, the availability of 'uber-sensors,'" the researchers wrote. Co-authors are Rubye Farahi and Laurene Tetard of ORNL and Thomas Thundat of the University of Alberta.

Salmonella, E-coli, pesticides and mercury are among key targets for sensors, so a clear public understanding of their capabilities - and limits - is essential, particularly because food and water make for highly complex chemical and biological environments, Passian said.

"Given the current physics of sensors, these hazards pose especially difficult challenges that will require further research and successful demonstration," Passian said.

The researchers explored paths necessary to ensure that sensors work as intended and can help protect the public - a goal they are confident can be achieved.

"While human and animal sensory capabilities are highly specific and can recognize the molecular fingerprints of many potentially harmful substances, developing similar and superior sensing capabilities is faced with many challenges for which nanoscience may provide new solutions," Passian said.

Nanosensors take on a variety of shapes, sizes and architecture. In some devices, nanoparticles (gold, silicon, magnetic composites or polymers) or nanowires (gold, polymers or composites) that react in the presence of the targeted substance are incorporated into the instrument.

Advantages of nano-sized particles in sensors include low cost, high surface-to-volume ratios, high sensitivity, unique optical and electrical properties and fast response, but these are intertwined with offsetting traits.

A number of issues are inherent in the design and operation of nanosensors. For example, the fact the nano-sized particles are so tiny can reduce the probability of interactions with the substance to be measured. Consequently, sensor developers are burdened with reaching a balance between reliability, cost effectiveness, portability, robustness and mass producibility.

Passian and the co-authors also stressed the need for a real-time flow of information to allow for quicker response time to assess risk, damage and notification of the affected populations. Ultimately, while many quality control measures are in place in the United States and other countries, requirements will continue to be refined.

"With the ever-growing global population and unpredictable natural phenomena such as earthquakes, early development of better sensor technology for food and water safety is vitally important," Passian said.

The Department of Homeland Security funded this research. Passian, Tetard and Farahi are members of ORNL's Measurement Science and Systems Engineering Division. UT-Battelle manages ORNL for the Office of Science. The Office of Science is the single largest supporter of basic research in the physical sciences in the United States and is working to address some of the most pressing challenges of our time. For more information, please visit science.energy.gov.

####

For more information, please click here

Contacts:
Ron Walli
Communications and Media Relations
865.576.0226

Copyright © Oak Ridge National Laboratory

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

The paper is available at:

Related News Press

Laboratories

Secure Computing for the ‘Everyman': Quantum computing goes to market in tech transfer agreement with Allied Minds September 2nd, 2014

Cool Calculations for Cold Atoms: New theory of universal three-body encounters September 2nd, 2014

UO-Berkeley Lab unveil new nano-sized synthetic scaffolding technique: Oil-and-water approach from Richmond's UO lab to spark new line of versatile peptoid nanosheets September 2nd, 2014

News and information

New synthesis method may shape future of nanostructures, clean energy: Findings advance efficient solar spliting of water into hydrogen fuel September 2nd, 2014

Accounting for Biological Aggregation in Heating and Imaging of Magnetic Nanoparticles September 2nd, 2014

Engineers develop new sensor to detect tiny individual nanoparticles September 2nd, 2014

Future solar panels September 2nd, 2014

Govt.-Legislation/Regulation/Funding/Policy

Secure Computing for the ‘Everyman': Quantum computing goes to market in tech transfer agreement with Allied Minds September 2nd, 2014

Cool Calculations for Cold Atoms: New theory of universal three-body encounters September 2nd, 2014

UO-Berkeley Lab unveil new nano-sized synthetic scaffolding technique: Oil-and-water approach from Richmond's UO lab to spark new line of versatile peptoid nanosheets September 2nd, 2014

Accounting for Biological Aggregation in Heating and Imaging of Magnetic Nanoparticles September 2nd, 2014

Sensors

New synthesis method may shape future of nanostructures, clean energy: Findings advance efficient solar spliting of water into hydrogen fuel September 2nd, 2014

Engineers develop new sensor to detect tiny individual nanoparticles September 2nd, 2014

Copper shines as flexible conductor August 29th, 2014

Novel 'butterfly' molecule could build new sensors, photoenergy conversion devices August 28th, 2014

Discoveries

Secure Computing for the ‘Everyman': Quantum computing goes to market in tech transfer agreement with Allied Minds September 2nd, 2014

Cool Calculations for Cold Atoms: New theory of universal three-body encounters September 2nd, 2014

UO-Berkeley Lab unveil new nano-sized synthetic scaffolding technique: Oil-and-water approach from Richmond's UO lab to spark new line of versatile peptoid nanosheets September 2nd, 2014

Future solar panels September 2nd, 2014

Announcements

New synthesis method may shape future of nanostructures, clean energy: Findings advance efficient solar spliting of water into hydrogen fuel September 2nd, 2014

Accounting for Biological Aggregation in Heating and Imaging of Magnetic Nanoparticles September 2nd, 2014

Engineers develop new sensor to detect tiny individual nanoparticles September 2nd, 2014

Future solar panels September 2nd, 2014

Tools

Accounting for Biological Aggregation in Heating and Imaging of Magnetic Nanoparticles September 2nd, 2014

Raman Whispering Gallery Detects Nanoparticles September 1st, 2014

New analytical technology reveals 'nanomechanical' surface traits August 29th, 2014

Ultra-Low Frequency Vibration Isolation Stabilizes Scanning Tunneling Microscopy at UCLA’s Nano-Research Group August 28th, 2014

Homeland Security

Watching Schrödinger's cat die (or come to life): Steering quantum evolution & using probes to conduct continuous error correction in quantum computers July 30th, 2014

Production of Toxic Gas Sensor Based on Nanorods July 28th, 2014

Nano-sized Chip "Sniffs Out" Explosives Far Better than Trained Dogs: TAU researcher's groundbreaking sensor detects miniscule concentrations of hazardous materials in the air July 23rd, 2014

Tiny laser sensor heightens bomb detection sensitivity July 19th, 2014

Food/Agriculture/Supplements

Iran Unveils 5 Home-Made Knowledge-Based Products August 25th, 2014

Nanotechnology Helps Production of Super Adsorbent Polymers August 21st, 2014

Success in Intracellular Imaging of Cesium Distribution in Plants Used for Cesium Absorption August 19th, 2014

AQUANOVA receives Technology Leadership Award 2014 FROST & SULLIVAN honors NovaSOL® Technology again August 12th, 2014

Water

New Nanosorbent Helps Elimination of Colorants from Textile Wastewater August 25th, 2014

Eco-friendly 'pre-fab nanoparticles' could revolutionize nano manufacturing: UMass Amherst team invents a way to create versatile, water-soluble nano-modules August 13th, 2014

PerkinElmer to Display Innovative Detection and Informatics Offerings at ACS National Meeting & Exposition Detection, Data Visualization and Analytics for Chemistry Professionals August 8th, 2014

A new way to make microstructured surfaces: Method can produce strong, lightweight materials with specific surface properties July 29th, 2014

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 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE