Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Carbon nanostructures for easier detection of Parkinson's disease

Microscope image of an electrode surface with 24 layers of polysilicate submicroparticles coated with carbon nanoparticles. Such electrodes, developed at the Institute of Physical Chemistry of the Polish Academy of Sciences in Warsaw, Poland, allow for dopamine sensing in solutions in the presence of interfering substances.
Microscope image of an electrode surface with 24 layers of polysilicate submicroparticles coated with carbon nanoparticles. Such electrodes, developed at the Institute of Physical Chemistry of the Polish Academy of Sciences in Warsaw, Poland, allow for dopamine sensing in solutions in the presence of interfering substances.

Abstract:
Dopamine deficiency is indicative of serious diseases of the nervous system. Tests of dopamine concentration - being usually very low in physiological fluids - are expensive and require specialised equipment that is unavailable in doctor's offices. This situation may change due to a recent invention from the Institute of Physical Chemistry of the Polish Academy of Sciences in Warsaw. New electrodes coated with carbon nanoparticles deposited on silicate submicroparticles allow to detect dopamine in solutions easily and at low cost, even in the presence of interferences.

Carbon nanostructures for easier detection of Parkinson's disease

Warsaw, Poland | Posted on October 28th, 2011

Researchers at the Institute of Physical Chemistry of the Polish Academy of Sciences (IPC PAS) have developed electrodes coated with carbon nanoparticles deposited on silicate submicroparticles. The electrodes have been successfully applied to determine dopamine concentration in solutions in the presence of uric and ascorbic acids, and paracetamol, the substances interfering with dopamine analysis. The developed method of dopamine detection opens the way to low cost and quick medical tests that could be used by physicians in their offices to determine with high likelihood if a patient suffers from popular nervous system diseases, such as Parkinson's disease.

The electrodes developed at Institute of Physical Chemistry of the PAS are composed of alternate layers of silicate submicroparticles and carbon nanoparticles. The silicate submicroparticles are from 100 to 300 nanometer (billionth parts of meter) in size. As nonconductive, they are used only as a framework extending the electrode surface. The silicate particles are densely coated with carbon nanoparticles (from 8 to 18 nm in size) that form the actual conductive working surface.

The fabrication of electrodes with new coatings is low cost. The electrodes are alternately immersed for a few seconds in appropriately prepared suspensions, one containing silicate submicroparticles and the other - carbon nanoparticles. "Carbon nanoparticles have negatively charged functional groups, and the silicates positively charged ones. The electrostatic interactions between them are quite strong. We checked that by multiple repeating of the immersion a ‘sandwich' consisting of up to 24 layers can be obtained on the electrode surface", describes Anna Celebańska, a PhD student at the IPC PAS.

The researchers from the Institute of Physical Chemistry of the PAS have applied the new electrodes for dopamine sensing in solutions.

Dopamine deficiency is characteristic for, i.a., Parkinson's disease and therefore the detection of the deficiency is of essential medical importance. This, however, is not simple, as dopamine concentration in body fluids, even in healthy individuals, is very low. Moreover, samples containing dopamine usually include other compounds such as uric and ascorbic acid. Both compounds generate signals similar to those produced by dopamine, and they are present at thousand-fold higher concentrations.

To test dopamine concentration using the new method, the electrodes with carbon nanoparticles are immersed in an appropriately prepared solution containing the sample, and then electric potential is applied. Dopamine is electrochemically active and can be oxidised by appropriately adjusting the potential value. Unfortunately, dopamine signal is usually masked by signals originating from ascorbic and uric acids. The carbon nanoparticles on the electrode surfaces change, however, the potential values at which both acids are oxidised. Consequently, the peaks in the plot are separated and the signal from dopamine becomes visible.

"The results of the completed tests turned out very good. Our method is among the most sensitive methods for dopamine sensing. It allows to detect dopamine at concentrations as low as 10-7 mole per liter in the presence of interferences at concentrations up to 10-3 mole per liter", says Celebańska.

The present methods of dopamine sensing are expensive and require specialized equipment, but at the same time relatively cheap, palm-size instruments for detection of chemicals are available on the market. If they would be equipped with new electrodes and popularized in doctor's offices, a patient might learn about his/her illness before leaving the doctor's office.

Dopamine sensing with new electrodes is possible down to concentrations corresponding to those in body fluids of a healthy individual. Lower concentrations that are characteristic for sick individuals will not be precisely determined and the detector will not work. "The method has a natural detection threshold, and that's why we can conclude on dopamine deficiency in the body. How large is the actual deficiency? At present we cannot answer the question. We hope, however, for further increase in the method's sensitivity", states Prof. Marcin Opałło from IPC PAS.

The electrodes coated with carbon nanoparticles deposited on polysilicates have been developed under the project "Quantum semiconductor nanostructures for applications in biology and medicine". The over 73 million PLN project is funded in 85% from the European Regional Development Fund under the Innovative Economy Operational Programme 2007-2013. The main participants to the project are the Institute of Physics of the PAS (coordinating body), the Institute of Physical Chemistry of the PAS and the Institute of High Pressure Physics of the PAS. The results of the study have been published in the journal "Biosensors and Bioelectronics". The publication was preceded by a patent application.

####

About Institute of Physical Chemistry of the Polish Academy of Sciences
The Institute of Physical Chemistry of the Polish Academy of Sciences (http://www.ichf.edu.pl/) was established in 1955 as one of the first chemical institutes of the PAS. The Institute's scientific profile is strongly related to the newest global trends in the development of physical chemistry and chemical physics. Scientific research is conducted in nine scientific departments. CHEMIPAN R&D Laboratories, operating as part of the Institute, implement, produce and commercialise specialist chemicals to be used, in particular, in agriculture and pharmaceutical industry. The Institute publishes approximately 200 original research papers annually.

For more information, please click here

Contacts:
Antoni Szafranski
+48 22 343 3262


Prof. Marcin Opałło
Institute of Physical Chemistry of the Polish Academy of Sciences
tel. +48 22 3433375

Copyright © AlphaGalileo

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

Raman Whispering Gallery Detects Nanoparticles September 1st, 2014

A new, tunable device for spintronics: An international team of scientists including physicist Jairo Sinova from the University of Mainz realises a tunable spin-charge converter made of GaAs August 29th, 2014

Nanoscale assembly line August 29th, 2014

New Vice President Takes Helm at CNSE CMOST: Catherine Gilbert To Lead CNSE Children’s Museum of Science and Technology Through Expansion And Relocation August 29th, 2014

Nanomedicine

Nanoscale assembly line August 29th, 2014

Copper shines as flexible conductor August 29th, 2014

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

PetLife Comments on CNN Story on Scorpion Venom Health Benefits August 27th, 2014

Discoveries

Raman Whispering Gallery Detects Nanoparticles September 1st, 2014

A new, tunable device for spintronics: An international team of scientists including physicist Jairo Sinova from the University of Mainz realises a tunable spin-charge converter made of GaAs August 29th, 2014

Nanoscale assembly line August 29th, 2014

Copper shines as flexible conductor August 29th, 2014

Announcements

Raman Whispering Gallery Detects Nanoparticles September 1st, 2014

Nanoscale assembly line August 29th, 2014

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

New Vice President Takes Helm at CNSE CMOST: Catherine Gilbert To Lead CNSE Children’s Museum of Science and Technology Through Expansion And Relocation August 29th, 2014

Patents/IP/Tech Transfer/Licensing

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

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

Blacktrace Holdings Ltd. to in-license PerkinElmer Technology August 8th, 2014

Silicene Labs Announces the Launch of Patent-Pending, 2D Materials Composite Index™ : The Initial 2D Materials Composite Index™ for Q2 2014 Is: 857.3; Founders Include World-Renowned Physicist and Seasoned Business and IP Professionals July 24th, 2014

Quantum nanoscience

New technique uses fraction of measurements to efficiently find quantum wave functions August 28th, 2014

X-ray Laser Probes Tiny Quantum Tornadoes in Superfluid Droplets: SLAC Experiment Reveals Mysterious Order in Liquid Helium August 25th, 2014

Rice physicist emerges as leader in quantum materials research: Nevidomskyy wins both NSF CAREER Award and Cottrell Scholar Award August 20th, 2014

Molecular engineers record an electron's quantum behavior August 14th, 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