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Home Sensors Nanophotonic technology and device for assay of water contaminated with toxic aromatic compounds in water objects

Nanophotonic technology and device for assay of water contaminated with toxic aromatic compounds in water objects

Description

The essence of our proposal is the nanophotonic sensor for polycyclic aromatic hydrocarbons (PAHs) detection in the water objects. PAHs are the widespread environ-mental contaminants that can be found in atmosphere, water, soil, sediment and organisms. Among most dangerous PAHs for human is benzo[a]pyrene (BP). BP is carcinogen and its ingestion leads to oncologic diseases. Maximum contaminant level of BP in drinking water is 0.2 μg/l. Therefore development a new modern technologies and devices with a low BP detection limit in water objects is urgent and important for different utilization.

Nanophotonic sensor for BP detection in water is based on combination of electrochemical and electrochemiluminescence (ECL) assay principles with the application of nanomaterials such as semiconductor quantum dots (QDs) and nanotechnologies for working electrode modification.


Fig. 1 Thin QD films formation on sensor working electrode using LB technology:
1 – LB trough; 2 – mechanism of lowering the lining; 3 – Wilhelm balances;
4 – swimming barrier; 5 – the QD solution on the surface of distilled water;
6 – solid substrate


Fig. 2 Scheme of modified working electrode structure:
1 – detector elements (QDs); 2 – glass carbon surface;
3 – transparent semiconductor

Innovative Aspect and Main Advantages

Innovative aspect of the proposed nanophotonic sensor consists in the LB technology for thin QDs layers formation and deposition onto the working electrodes of a sensor device and using of ECL method as detection method. This makes possible to detect extremely low BP concentration in water, makes their detection very sensitive that is important for ecological applications.

Main advantages of the developed sensor are:

  • low limit of detection (down to 1X10-9 mole/l);
  • rather fast and simple sample preparation and assay procedures;
  • low assay cost;
  • portability, energy efficiency and fully automatization of an assay;
  • possibility of recycling of sensor’s materials.

It is competitive with known analytical technologies for bioliquids assay such as fluorescent, electrochemical etc.

Areas of Application

The developed nanophotonic sensor for toxic aromatic compounds detection can be used for ecology assay and monitoring of aqueous mediums. In particular it can be applied outside the laboratory is so called field conditions.


Fig. 3 Principle of toxic aromatic compounds detection in water objects using nanophotonic sensor

Stage of Development

Proposed assay technology and sensor’s instrument for BP detection are constructed and tested as a laboratory samples.

Contact Details

Mykola Rozhitskii, Professor, Dr. of Phys.-Math Sci., Academician of Applied Radio Electronics Academy, Scientific Supervisor of Laboratory of Analytical Opto-chemotronics, Olga Sushko, PhD student.
Organization: Kharkiv National University of Radio Electronics, Bio-medical Electronics Dep., Laboratory of Analytical Opto-chemotronics
Address: Ukraine, 61166, Kharkiv, 14, Lenin Ave.
+380 57 7020-369
This e-mail address is being protected from spambots. You need JavaScript enabled to view it , This e-mail address is being protected from spambots. You need JavaScript enabled to view it
web: http://electrohim.kture.kharkov.ua

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