Related Experiment Video
Updated: Feb 4, 2026

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors
Published on: November 15, 2016
A novel molecularly imprinted sensor for imidacloprid pesticide based on poly(levodopa) electro-polymerized/TiO2
Javad Ghodsi1, Amir Abbas Rafati2
1Department of Physical Chemistry, Faculty of Chemistry, Bu-Ali Sina University, P.O. Box 65174, Hamedan, Iran.
Abstract:
This research reports the first application of poly(levodopa) in the development of a molecularly imprinted sensor. A novel electrochemical sensor with high selectivity and sensitivity was developed for imidacloprid (IMD) determination based on an imprinted poly(levodopa) electro-polymerized on electrodeposited TiO2 nanoparticles (TiO2NPs) modified glassy carbon electrode (GCE). High affinity of IMD imprinted poly(levodopa) to IMD provided a very selective response of the electrode to IMD and electrodeposited TiO2NPs at the electrode surface resulted in the electrocatalytic reduction of IMD and consequently high sensitivity of the modified electrode. IMD imprinted poly(levodopa) electro-polymerized on TiO2NPs was well characterized by FT-IR, SEM, and EDX techniques. Sensor response to IMD was investigated by using square wave voltammetry (SWV), cyclic voltammetry (CV), and differential pulse voltammetry (DPV) techniques. The sensor showed a really vast linear range of 2-400 μM, completely low detection limit (LoD) of 0.3 μM, and limit of quantitation (LoQ) of 1 μM by SWV measurements that are very acceptable in comparison to other reported IMD sensors. Sensor application in real samples for IMD determination showed good applicability of the developed sensor. Response time is very short and the sensor showed suitable repeatability and stability after use several times. Graphical abstract ᅟ.
More Related Videos
Related Concept Videos
Imprinting
Genomic Imprinting and Inheritance
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
Electro-mechanical Systems
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
Solution Composition During Acid/Base Titrations
The α0 and α1 values...
Classifying Matter by Composition
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures.
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated.
A mixture is composed of two or...
Molecular Models

