Carbon nitride thin films and nanopowders produced by CO2 laser pyrolysis

R. Alexandrescu; R. Cireasa; C. S. Cojocaru; A. Crunteanu; I. Morjan; F. Vasiliu; A. Kumar

doi:10.1179/026708499101516579

Carbon nitride thin films and nanopowders produced by CO₂ laser pyrolysis

R. Alexandrescu, R. Cireasa, C. S. Cojocaru, A. Crunteanu, I. Morjan, F. Vasiliu, A. Kumar

Research output: Contribution to journal › Article › peer-review

Abstract

Nanocrystalline CN_x particles and thin films were produced in a flow reactor system by the CO₂ laser pyrolysis of sensitised NH₃-N₂O-C₂H₂ reactant gas mixtures. Depending on the substrate nature (silicon or quartz) the SEM and TED analysis of the CN_x thin films revealed specific nucleation and growth morphologies of crystallites, resembling the β-C₃N₄ phase. In the case of C₃N₄ nanopowder synthesis, the relative concentration of the sensitisers (SF₆/C₂H₄) was varied to minimise SF₆ decomposition. The majority of the data obtained from powder analysis (XRD, XPS, and ir transmission measurements) suggests the presence of CN bonded phases and the formation of α- and β-C₃N₄ structures.

Original language	English
Pages (from-to)	230-234
Number of pages	5
Journal	Surface Engineering
Volume	15
Issue number	3
DOIs	https://doi.org/10.1179/026708499101516579
Publication status	Published - 1 Jan 1999
Externally published	Yes

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title = "Carbon nitride thin films and nanopowders produced by CO2 laser pyrolysis",

abstract = "Nanocrystalline CNx particles and thin films were produced in a flow reactor system by the CO2 laser pyrolysis of sensitised NH3-N2O-C2H2 reactant gas mixtures. Depending on the substrate nature (silicon or quartz) the SEM and TED analysis of the CNx thin films revealed specific nucleation and growth morphologies of crystallites, resembling the β-C3N4 phase. In the case of C3N4 nanopowder synthesis, the relative concentration of the sensitisers (SF6/C2H4) was varied to minimise SF6 decomposition. The majority of the data obtained from powder analysis (XRD, XPS, and ir transmission measurements) suggests the presence of CN bonded phases and the formation of α- and β-C3N4 structures.",

author = "R. Alexandrescu and R. Cireasa and Cojocaru, \{C. S.\} and A. Crunteanu and I. Morjan and F. Vasiliu and A. Kumar",

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T1 - Carbon nitride thin films and nanopowders produced by CO2 laser pyrolysis

AU - Alexandrescu, R.

AU - Cireasa, R.

AU - Cojocaru, C. S.

AU - Crunteanu, A.

AU - Morjan, I.

AU - Vasiliu, F.

AU - Kumar, A.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - Nanocrystalline CNx particles and thin films were produced in a flow reactor system by the CO2 laser pyrolysis of sensitised NH3-N2O-C2H2 reactant gas mixtures. Depending on the substrate nature (silicon or quartz) the SEM and TED analysis of the CNx thin films revealed specific nucleation and growth morphologies of crystallites, resembling the β-C3N4 phase. In the case of C3N4 nanopowder synthesis, the relative concentration of the sensitisers (SF6/C2H4) was varied to minimise SF6 decomposition. The majority of the data obtained from powder analysis (XRD, XPS, and ir transmission measurements) suggests the presence of CN bonded phases and the formation of α- and β-C3N4 structures.

AB - Nanocrystalline CNx particles and thin films were produced in a flow reactor system by the CO2 laser pyrolysis of sensitised NH3-N2O-C2H2 reactant gas mixtures. Depending on the substrate nature (silicon or quartz) the SEM and TED analysis of the CNx thin films revealed specific nucleation and growth morphologies of crystallites, resembling the β-C3N4 phase. In the case of C3N4 nanopowder synthesis, the relative concentration of the sensitisers (SF6/C2H4) was varied to minimise SF6 decomposition. The majority of the data obtained from powder analysis (XRD, XPS, and ir transmission measurements) suggests the presence of CN bonded phases and the formation of α- and β-C3N4 structures.

U2 - 10.1179/026708499101516579

DO - 10.1179/026708499101516579

M3 - Article

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SN - 0267-0844

VL - 15

SP - 230

EP - 234

JO - Surface Engineering

JF - Surface Engineering

IS - 3

ER -

Carbon nitride thin films and nanopowders produced by CO2 laser pyrolysis

Abstract

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Carbon nitride thin films and nanopowders produced by CO₂ laser pyrolysis