Project name: Fabrication of photofunctional guest/layered double hydroxide host hybrid thin films

Acronym: PHOTOLAY

Contract no. 271/ 2015-10-01

Project codePN-II-RU-TE-2014-4-1550

Program: Human Resources

 

Project type: Research projects for the stimulation of the forming of young independent research teams

 

Project director: Alexandra Angela Vlad

Coordinator: National Institute for Lasers, Plasma, and Radiation Physics (INFLPR)

Financing Authority: Executive Unit for Financing Higher Education, Research, Development and Innovation (UEFISCDI)
 

Project summary:

The preparation of a highly photofunctional hybrid thin films of intercalated chromophores in Layered double hydroxides (LDH) matrix by pulsed laser deposition (PLD) is investigated, and the functionality of the films will be examined through the optical properties  introduced by the chromophore. The use of composite of organic chromophores offers a number of advantages. An interesting class of chromophores is coumarins and coumarins derivates. Two systems will be studied: coumarin intercalated in MgAl-LDH and coumarin and dodecyl sulfate (DS) co-intercalated in MgAl-LDH.  Layered double hydroxides are materials of a growing interest in the field of material chemistry due to their structural anisotropy which allow an easy functionalization by intercalation of some species with specific properties. Finding proper conditions for the deposition of the photofunctional guest/layered double hydroxide host hybrid thin films would be the difficulty and the challenge of the project. The project is of scientific impact because for a large number of optically functional materials, both for passive (absorption) as well as active (emission) materials the incorporation into a matrix is an inevitable necessity for their further applications. The functionality of coumarins is exploited mostly in the solution phase therefore confined them between two “hard” layers and next, fixing them on a substrate as thin films is a first step to fulfill in order to extent their applicability.

  

Value of the project: 550,000 lei

Duration: 26 months

 

First stage - 31.12.2015 (click for the scientific report)

Value of first stage: 90.000 lei

Establishing the Mg-Al layered double hydroxides (LDHs) and dodecylsulfate (DS) modified LDHs powder preparation method and their characterization.

  

Second stage - 31.12.2016

Value of second stage: 284,391 lei

Coumarin modified LDHs powders preparation and coumarin modified LDH thin film deposition using pulsed laser deposition (PLD)
Objectives:
- Establishing the protocol for coumarin- LDH synthesis method
Activity 1. Selection of powder preparation method
Activity 2. Powder characterization by XRD, SEM
Activity 3. Thermogravimetric measurements on powders
- Selection of the appropriate PLD deposition conditions
Activity 1. LDH thin film deposition
Activity 2. Structural, morphological characterization of the deposited layers
Activity 3. Optical characterization of the deposited layers

Dissemination:
1. "Nanocomposite dodecyl sulfate-modified Mg-Al layered double hydroxide thin films deposited via laser technique", A. Vlad, R. Birjega, A. Matei, I. Tirca, M. Dinescu, R. Zavoianu, O.D. Pavel, M.C. Corobea, TechConnect World 2016, Washington DC, USA, 22-25.05.2017 (POSTER)
2. "Comparison of different routes for the manufacture of intercalated dodecyl sulfate Mg,Al-layered double hydroxides composite thin films using laser techniques", I. Tirca, A. Vlad, R. Birjega, A. Matei, M. Dumitru, M. Dinescu, R. Zavoianu, M.C. Corobea, 10TH INTERNATIONAL CONFERENCE ON PHOTOEXCITED PROCESSES AND APPLICATIONS, Brasov, Romania, 29.08-02.09.2016 (POSTER)
3. "Conditions for the deposition of organo-layered double hydroxides hybrid thin films by laser techniques", A. Vlad, R. Birjega, A. Matei, I. Tirca, M. Dinescu, 11th International Conference On Physics Of Advanced Materials, Cluj-Napoca, Romania, 08.09.2016-14.10.2016 (ORAL PRESENTATION)
4. Research stage Linz-JKU Austria, 28.06-03.07.2016
 

Third stage - 30.11.2017

Value of third stage: 175,609 lei