Nanostructured materials for aplications in sensors and optoelectronic technology


Project Director: Dr. Mihaela Baibarac

Abstract

In the frame of this grant we intend to perform a research on a composite material based on carbon nanotubes (CNs) and inorganic semiconductings as zinc oxide (ZnO), which  can be used as active compound in the sensor technology and optoelectronic devices. A great attention will be paid to the synthesis procedures and characterization by optical methods of the final compound. For a duration of 3 years are proposed following scientific objectives to be carry out: i) producing and characterization by Raman scattering, ultraviolet-visible-near infrared (UV-VIS-NIR) absorption and photoluminescence (PL) spectroscopy of the blend consisting from single-walled carbon nanotubes (SWNTs) and ZnO nanoparticles; ii) modeling of  the PL properties of CNs/ZnO composite by selective chemical reactions between the metallic and semiconducting component of CNs with ZnO; iii) technological researches concerning the electrochemical and chemical synthesis of the SWNTs/ZnO composite material; iv) characterization by optical methods ( Raman scattering, UV-VIS-NIR and PL spectroscopy) and electronic  microscopy (transmission  electron  microscopy (TEM), scanning electron  microscopy (SEM)) of the SWNTs/ZnO material; v) testing and features of  SWNTs/ZnO hybrid materials as chemical sensor . Three routes are proposed to prepare of  the SWNTs/ZnO hybrid material: i) mechanic-chemical process, which imply mechanical motions/energy control chemical reactions to direct mixing of the ZnO with nanotubes, ii) chemical synthesis of  the ZnO  in the presence of  SWNTs; and iii) electrochemical synthesis of ZnO on the SWNTs electrode.

Project Buget

25.000 euros

Contractual Authority

NATO Security through Science Programme

Activities

Stages Activities Calendar
Stage I
Characterization by transmission  electron  microscopy (TEM), Raman scattering, ultraviolet-visible-near infrared (UV-VIS-NIR) absorption and photoluminescence (PL) spectroscopy of  the blend consisting from single-walled carbon nanotubes (SWNTs) and ZnO nanoparticles 
11.11.2005
Stage II
Chemical and electrochemical synthesis of the single-walled carbon nanotubes/ zinc oxide (SWNTs/ZnO) composites and their characterization by Raman spectroscopy, photoluminescence and the transmission electronic microscopy (TEM)
30.10.2006
Stage III Performances of different composites based on SWNTs and the ZnO nanoparticles of the type nano-ovoids, nano-whiskers or nano-flacks as sensor of  the CH3COOH vapours 18.02.2008

 

  1. Mechanico-chemical interaction of single-walled carbon nanotubes with ZnO evidenced by photoluminescence and SERS spectroscopy, M. Baibarac, I. Baltog, S. Frunza, S. Lefrant, J. Y. Mevellec, C. Godon, Journal of Optoelectronics and Advanced Materials 9(5), 1422, 2007
  2. Vibrational and photoluminescence properties of composites based on zinc oxide and single-walled carbon nanotubes, M. Baibarac, I. Baltog, S. Lefrant, J. Y. Mevellec, M. Husanu, Physica E: Low-dimensional Systems and Nanostructures, 40 (7), (2008), pp. 2556-2564
  3. Photoluminescence properties of composites based on zinc oxide and single-walled carbon nanotubes, M. Baibarac, I. Baltog, M. Husanu, T. Velula, C. Bucur, L. Mihut, N. Preda, Journal of Optoelectronics and Advanced Materials 10(2), 288, 2008
  4. Chapter 15. Surface enhanced Raman scattering of carbon based nanomaterials, I. Baltog, M. Baibarac, S. Lefrant, in Encyclopedia of Nanoscience and Nanotechnology edited by H. Nalwa, American Scientific Publishers, vol. 15, 50 pag, 2010

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