Applied Physics A

, 123:695 | Cite as

Laser pyrolysis synthesis of Sn–Fe–N@polycarbosilazane nanocomposites, characterization and evaluation as energy storage materials

  • Claudiu Teodor FleacaEmail author
  • Florian Dumitrache
  • Ion Sandu
  • Elena Dutu
  • Alina Ilie
  • Ana-Maria Banici
  • Eugeniu Vasile
  • Codruta Vlaic
  • Andreas Bund
  • Gabriel Prodan


We report the single-step synthesis of novel tin-based core–carbosilazane shell nano-composites using laser pyrolysis technique. Controlled NH3 flows were used to entrain the vapors of volatile precursors: Sn(CH3)4 (TMT) and Fe(CO)5 injected through center for the core and [Si(CH3)3]2NH (HMDS) through the annular nozzle for the shell. Both NH3 and HMDS plays also the role of absorbers of the IR laser radiation. The obtained nanoparticles shown polydispersity with sizes from 5 up to around 120 nm, having spheroidal crystalline core—disordered shell morphology as confirmed by transmission electron microscopy images, where also short amorphous nanofibers were observed. The dominant crystalline phase β-Sn (having mean crystallite size between 22 and 29 nm) and minor tin-iron intermetallic and nitride phases were identified by X-ray diffraction. Infrared spectra show the presence of Si–N and Si–C bonds, pointing to a carbosilazane composition of the shells, accompanied by Si–O bonds due to partial oxidation after air exposure. Three different samples were obtained by keeping constant the Sn and Fe precursors flows and diminishing the HDMS flow, together with the corresponding NH3 flows. Preliminary tests of these materials as anodes for Li-ion battery showed an initial discharge capacity near 800 mAg/h which decreased to 300 mAh/g after 20 cycles for the sample having the highest Sn content.



The financial support from Human Resources Program—Young Researcher Teams Subprogram PN-II-RU-TE-2014-4-2834 of the Romanian Ministry of Education and Research and from Romanian National Authority for Research and Innovation Nucleu Program 4N/2016 is greatly acknowledged. In addition, the authors are grateful to the following collaborators for their help: Dr. Cristian Mihailescu (XPS analysis), Dr. Marius Dumitru (EDS elemental evaluation) and Dr. Oana Marinica (magnetic measurements).


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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Claudiu Teodor Fleaca
    • 1
    Email author
  • Florian Dumitrache
    • 1
  • Ion Sandu
    • 1
  • Elena Dutu
    • 1
    • 4
  • Alina Ilie
    • 1
    • 4
  • Ana-Maria Banici
    • 1
    • 5
  • Eugeniu Vasile
    • 3
  • Codruta Vlaic
    • 2
  • Andreas Bund
    • 2
  • Gabriel Prodan
    • 6
  1. 1.National Institute for Lasers, Plasma and Radiation Physics (NILPRP)BucharestRomania
  2. 2.Institute für Werkstofftechnik, FG Electrokemie und GalvanotechnikIlmenau Technische UniversitatIlmenauGermany
  3. 3.Department of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials ScienceUniversity Politehnica of BucharestBucharestRomania
  4. 4.Faculty of PhysicsUniversity of BucharestBucharestRomania
  5. 5.Faculty of Mathematics and Natural SciencesUniversity of CraiovaCraiovaRomania
  6. 6.Faculty of Mechanical, Industrial and Marine Engineering“Ovidius” University of ConstantaConstanțaRomania

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