X-Ray Characterization of Nanostructured Materials

Roman Pielaszek 3,4Stanisław Gierlotka 4Ewa Grzanka 3,4Svitlana Stelmakh 4Bogdan F. Palosz 4

1. Warsaw University, Faculty of Physics, Hoża 69, Warszawa 00-681, Poland
2. Polish Academy of Sciences, High Pressure Research Center (UNIPRESS), Sokolowska 29/37, Warszawa 01-142, Poland
3. Warsaw University, Faculty of Physics, Hoża 69, Warszawa 00-681, Poland
4. Polish Academy of Sciences, High Pressure Research Center (UNIPRESS), Sokolowska 29/37, Warszawa 01-142, Poland

Abstract


One of most general diffraction laws, Debye formula, allows to
calculate X-Ray powder diffraction pattern of any cluster of atoms,
with no additional assumptions about its structure. Nowadays computers
enable a direct ('ab initio') calculations of diffraction profiles for
clusters as large as several hundred in diameter, fairly covering
scale of nanomaterials.
Population of atomic models of SiC, GaN and diamond nanocrystals used
for calculations of the diffraction effects were built to examine the
effects of average grain size, grain size distributions, presence of
stacking faults, shape anisotropies, surface strains, bulk strains or
a combination of above. Genetic Algorithm (GA) survives the fittest
individual model, with compliance to experimental data as a fitness
function.
Here we give some examples of X-Ray-based analysis of nanocrystalline
materials and we will concentrate on sensitivity of the method to some
specific structural properties, in particular to determination of
grain size distribution and presence of stacking faults in individual
crystallites.
In this work we will present the method of performance of 'ab initio'
calculations of the diffraction profiles of nanocrystalline powders
which we developed and we present here as rpnano package being a
software tool for X-Ray characterization of nanostructured materials.
Acknowledgements
This work was supported by the State Committee for Scientific
Research, Grants No. 7/T08A/036/18 and 7/T08A/030/19.

 

Related papers
  1. Real Time Characterisation of nanoMaterials
  2. Analysis of density waves in CdSe, SiC, and diamond nanocrystals by application of NanoPDF software package to experimental Pair Distribution Functions.
  3. Crystallite size determination from diffraction data: a do-it-yourself tutorial.  
  4. Diamond-tungsten carbide nanocomposite
  5. Reliable XRD characterization in production or high-throughput laboratory regime
  6. GaN substrates with variable surface miscut for laser diode applications
  7. Semipolar (2021) UV LEDs and LDs grown by PAMBE
  8. High-pressure diffraction study of structural and elastic properties of zircon-type and scheelite-type RVO4 (R = Nd, Eu)
  9. Looking at the real structure of nanocrystals with powder diffraction: the apparent lattice parameter approach
  10. Localization of rare-earth dopants in the lattice of nanocrystalline ZrO2 - EXAFS study
  11. Looking beyond limitations of diffraction methods of structural analysis of nanocrystalline materials
  12. X-ray and electron microscopy techniques studies on nanocrystalline MgO powder materials prepared by sol-gel method
  13. Statystyczna analiza deklarowanych kierunków rozwoju nowoczesnych materiałów w projekcie FOREMAT w powiązaniu z tematami polskich prac doktorskich, habilitacyjnych i grantów KBN
  14. Error bars in powder diffraction
  15. Synthesis of doped ZnO nanopowders in microwave hydrothermal reactors
  16. Characterization of nanopowders
  17. Combining microwave and pressure techniques for hydrothermal synthesis of ZnO and ZrO2 nanopowders doped with a range of metal ions
  18. Luminescence properties of zinc oxide nanopowders doped with Al ions obtained by the hydrothermal and vapour condensation methods.
  19. Structure of nanocrystalline powders of MgO prepared by sol-gel method
  20. Microwave technique applied on the hydrothermal synthesis and sintering of calcia stabilized zirconia nanoparticles
  21. Yttrium-Aluminum Garnet Synthesized in the Medium of Supercritical Fluids
  22. Growth of GaN layers on silicon and sintered GaN nano-ceramic substrates – TEM investigations
  23. Doping of ZnO nanopowders with Mn, Ni and Cr In an ultrasound and microwave driver hydrothermal reaction
  24. Localization of rare-earth dopants in the lattice of nanocrystalline ZrO2 - EXAFS study
  25. Characterization of nanocrystalline ZrO2 doped with Rare-Earth elements synthesized via High Pressure Hydrothermal Method
  26. Structure studies on nanocrystalline MgO powders prepared by sol-gel method dried under different conditions
  27. Morphology of Al doped Zinc Oxide Obtained using Hydrothermal and Vapour Condensation Methods
  28. Growth and properties of ytterbium doped KY(WO4)2 nanocomposites
  29. Doping of ZnO nanopowders with Mn and Cr in an ultrasound and microwave driven hydrothermal reaction
  30. Investigations of phase composition and grain size distribution in Pr doped ZrO2
  31. Dyfraktometryczna analiza mikro- i makro-naprężeń w spiekach i kompozytach otrzymanych pod wysokim ciśnieniem i wysoką temperaturą.
  32. Badania własności termicznych nanokryształów metodami dyfraktometrycznymi
  33. Morphology of Al doped zinc oxide obtained by the vapour condensation method
  34. Accuracy of XRD size measurements of nanocrystals
  35. Morphology of Al-Doped Zinc Oxide Obtained by the Vapour Condensation Methods
  36. Structure of nano-crystals: a key to understanding the unique properties of nano-materials
  37. Application of XRD diffraction methods for determination of grain size distribution in nanoparticles
  38. Fabrication and micro-structure characterization of Al2O3/Ni-P composites with interpenetrating phases
  39. Nanocrystalline SiC compacts obtained by sintering of laser synthesized nanopowders under extreme pressures
  40. High-pressure Induced Structural Decomposition of RE-doped YAG Nanoceramics
  41. Sintering of nanopowders under high pressure
  42. Synthesis and properties of GaAs nano-composites
  43. MD simulation of atomic structure of nanocrystals
  44. SiC-Zn nanocomposites obtained using high-pressure infiltration technique
  45. Sintering temperature effect on structure and properties of Al2O3/Ni-P composites with interpenetrating phases
  46. Grain Size and Grain Size Distribution of Nanocrystalline Pr-doped Zirconia Powders Obtained in High Pressure Microwave Reactor
  47. Influence of synthesis conditions on the particles size and the morphology of zinc oxide nanopowders
  48. Measuring the Grain Size Distribution of Pr-doped Zirconia Nanopowders obtained by Microwave Driven Hydrothermal Synthesis
  49. Structural and luminescence properties of yttrium-aluminum garnet (YAG) nanoceramics
  50. Fabrication and electrical properties of Eu3+:BaTiO3 nanoceramics for SOFC
  51. Analytical expression for Diffraction Line Profile for polydispersive powders
  52. FW1/5-4/5M method for determination of the Grain Size Distribution from powder diffraction line profile
  53. Dyfrakcyjne badania mikrostruktury polikryształów nanometrowych poddawanych działaniu wysokiego ciśnienia
  54. X-ray diffraction studies of thermal properties of bulk- and surface-atoms of nanocrystalline SiC
  55. Characterization of nanostructured hydroxyapatite ceramics densified at high-pressure and temperature
  56. Powder precursors for nanoceramics: cleaning and compaction
  57. Examination of the atomic Pair Distribution Function (PDF) of SiC nanocrystals by in-situ high pressure diffraction
  58. Investigation of the microstructure of SiC-Zn nanocomposites by microscopic methods: SEM, AFM and TEM
  59. Sythesis of metal-ceramic nanocomposites by high-pressure infiltration
  60. X-Ray investigations of the natural and artificial White Etching Layer
  61. Zinc oxide nanopowders obtained by the microwave-hydrothermal route
  62. Microwave driven hydrothermal synthesis of Pr-doped zirconia nanopowders
  63. The influence of temperature and pressure on possibility of obtaining Al2O3/Ni-P nanocomposite through hot pressing process.
  64. Precise determination of full Grain Size Distribution from diffraction peak profile as a result of kinematical theory of diffraction for polidispersive nanomaterials
  65. Generetion and Relaxation of Strain in SiC and GaN under Extreme Pressure
  66. Surface Diffraction Effects from Nanopowders under Pressure
  67. Influence of high pressure on the polytype structure of nanocrystalline GaN
  68. Transformation of fractal microstructure of nanocrystalline SiC and diamond in high pressures - Small Angle Scattering Study
  69. Synthesis of Nanocomposites Based on Superhard Ceramic Nanopowders

Presentation: oral at High Pressure School 2001 (4th), by Roman Pielaszek
See On-line Journal of High Pressure School 2001 (4th)

Submitted: 2003-02-16 17:33
Revised:   2009-06-08 12:55