|Title:||Nanompozite materials based on semiconductor and polymer layers interpenetration to manufacture sensors and luminescent diodes|
|Programme:||Bilateral Projects Moldova_Romania|
|Coordinating institutions:||Ghitu Institute of Electronic Engineering and Nanotechnologies,
ASM “P. Poni” Institute of Macromolecular Chemistry, Iasi, Romania
|Project Leader:||Ghimpu Lidia dr.|
|Participants:||Alexandru Burlacu, dr. Nicolae Leporda, dr. Lilian Sîrbu, dr. Victor Cojocaru|
|Keywords:||Nanocomposites, ZnO, ZnSe, polymers, dodes, porosity, AFM, SEM
Spectrums of activities in nanotechnologies embrace research in fundamental physics, chemistry biology in domain of synthesis and exploration of nanoobjects as well as development on their basis of nanomaterials and nanodevices for use in different domains of science and nanoengineering.
Polymer conjugation with inorganic materials provides new possibilities of elaboration of new nanocomposite materials with different properties and more efficient than those of nanocomposite components. Of a special importance is the choice of inorganic and organic components of the nanocomposite materials for specific application: photonics, sensors, nonlinear optics, and new methods of optic and electronic information recording.
ZnO is characterized by the possibility of achieving high concentrations of own defects: oxygen vacancies and internode atoms of zinc, oxygen suprastoichiometry, leading to the possibility of changing the optical properties, material conductivity and of intense luminiscence in the ”green” regions, as well as luminescence in the ”red” spectrum.
ZnSe is a wide band gap material, which corresponds to blue range of spectrum, and proves efficient luminescent properties. This material complements the use of ZnO for given project purpose in that it allows creation of nanostructured templates with controlled morphology by applying electrochemical etching of monocrystalline substrates, unlike zinc oxide. Combination of these two nanostructured materials with electronic conductibility with hole conducting polymers represents a strong base for development of luminescent devices and sensors in a large range of spectrum, including white-emitting devices.
The project itself includes a number of steps of interrelation of groups of researches in this project. In the first stage will be modeled the optical characteristics of nanoporous materials, a series of nanoporous semiconductor structures will be synthesized and after that the optical, morphological and structural characteristics will be studied. With the results of the first researches, new series of samples will be synthesized and studied with better and more defined methods.