Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Iranian Researchers Develop Simple Method to Measure Lead Levels

Abstract:
Iranian researchers succeeded in developing a simple test to quickly and accurately measure lead (II) levels in aqueous solutions down to very low concentrations.

Iranian Researchers Develop Simple Method to Measure Lead Levels

Iran | Posted on August 18th, 2010

The test, developed by Razi University researchers, uses a solution of azacrown ether-modified AuNPs, which changes color in the presence of the toxic metal ion. This color change is visually discernible by an appearance of the surface plasmon band (SPB) at 520 nm.

The recognition mechanism is attributed to the unique structure of monoazacrown ether attached to AuNPs and metal sandwiches coordinated between two azacrown ether moieties that are attached to separate AuNPs. This inter particle cross-linking results in aggregation and an apparent color change from brown to purple.

The sensor is selective against alkali-, alkaline-earth- and heavy-transition-metal ions. Such selectivity is essential for applications involving real environmental samples. Compared with many current optical chemosensors for lead (II), this sensor is rapid, cost-effective and enzyme-free.

The system allows easy detection of lead ions by the naked eye without resorting to any expensive instruments. Significantly, this method can, in principle, be used to detect other metal ions by changing the structure and the size of ionophores that selectively bind other metal ions.

The work, performed in collaboration with different teams, was managed by Dr Abdolhamid Alizadeh, the head of the nanoparticle research group at the Nanoscience and Nanotechnology Research Center (NNRC), Razi University, Kermanshah, western Iran,

Also Prof. Mohammad M Khodaei, University President. Changiz Karami is a graduate student in the group of Dr Alizadeh and is supported by a scholarship of the Iran Nanotechnology Initiative Council (INIC).

The functionalized thiols were synthesized in collaboration with Prof. M S Workentin, Department of Chemistry, University of Western Ontario, Canada. The UV-Vis experiments were conducted in collaboration with Prof. Mojtaba Shamsipour and his PhD student, Marzieh Sadeqi, in the Chemistry Department at Razi University.

The main research interest of Alizadeh's group is directed towards the investigation of parameters that affect the mechanisms and dynamics of organic reactions, such as condensation, coupling and complexation, occurring in ordered environments like gold nanoparticle surfaces.

The team is currently exploring new and selective protocols for adding (or removing) functionality to the surface of metallic nanoparticles.

####

For more information, please click here

Copyright © FARS

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

News and information

Stanford breakthrough heralds super-efficient light-based computers: Light can transmit more data while consuming far less power than electricity, and an engineering feat brings optical data transport closer to replacing wires May 29th, 2015

Donuts, math, and superdense teleportation of quantum information May 29th, 2015

OSU researchers prove magnetism can control heat, sound: Team leverages OSC services to help confirm, interpret experimental findings May 29th, 2015

Two UCSB Professors Receive Early Career Research Awards: The Department of Energy’s award for young scientists acknowledges UC Santa Barbara’s standing as a top tier research institution May 29th, 2015

Academic/Education

SUNY Poly CNSE and NIOSH Launch Federal Nano Health and Safety Consortium: May 20th, 2015

New JEOL E-Beam Lithography System to Enhance Quantum NanoFab Capabilities May 6th, 2015

FEI Partners With the George Washington University to Equip New Science & Engineering Hall: Suite of new high-performance microscopes will be used for cutting-edge experiments at GW’s new research facility April 29th, 2015

Renishaw Raman systems used to study 2D materials at Boston University, Massachusetts, USA. April 28th, 2015

Announcements

Stanford breakthrough heralds super-efficient light-based computers: Light can transmit more data while consuming far less power than electricity, and an engineering feat brings optical data transport closer to replacing wires May 29th, 2015

Donuts, math, and superdense teleportation of quantum information May 29th, 2015

OSU researchers prove magnetism can control heat, sound: Team leverages OSC services to help confirm, interpret experimental findings May 29th, 2015

Two UCSB Professors Receive Early Career Research Awards: The Department of Energy’s award for young scientists acknowledges UC Santa Barbara’s standing as a top tier research institution May 29th, 2015

Environment

Collaboration could lead to biodegradable computer chips May 28th, 2015

Conversion of Greenhouse Gases to Syngas in Presence of Nanocatalysts in Iran May 22nd, 2015

Directa Plus in Barcelona to present the innovative project GEnIuS for oil spills clean-up activities: The company has created a graphene-based product for the remediation of water contaminated by oil and hydrocarbons May 21st, 2015

Nano-policing pollution May 13th, 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