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Mesocrystal particles example

Scattering from cylindrically shaped mesocrystals on a substrate.

  • The sample is made of cylinder-shaped mesocrystals with outer dimensions: $R = 20$ nm, $H = 50$ nm.
  • The lattice axes are directed along x, y and z, with lattice parameter $5$ nm in each direction.
  • The nodes are spheres with $R = 2$ nm.
  • The planar distribution of the particles is diluted and random.
  • The incident wavelength is equal to 0.1 nm.
  • The incident angles are $\alpha_i = 0.2 ^{\circ}$ and $\varphi_i = 0^{\circ}$.

Intensity image

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#!/usr/bin/env python3
"""
Core shell nanoparticles
"""
import bornagain as ba
from bornagain import ba_plot as bp, deg, nm, std_samples


def get_sample():
    """
    A sample with box-shaped core-shell particles.
    """

    # Materials
    material_Core = ba.RefractiveMaterial("Core", 6e-5, 2e-8)
    material_Shell = ba.RefractiveMaterial("Shell", 1e-4, 2e-8)

    # Form factors
    ff_1 = ba.Box(12*nm, 12*nm, 7*nm)
    ff_2 = ba.Box(16*nm, 16*nm, 8*nm)

    # Particles
    core = ba.Particle(material_Core, ff_1)
    shell = ba.Particle(material_Shell, ff_2)
    particle = ba.CoreAndShell(core, shell)

    return std_samples.sas_sample_with_particle(particle)


def get_simulation(sample):
    beam = ba.Beam(1e9, 0.1*nm, 0.2*deg)
    n = 200
    detector = ba.SphericalDetector(n, -1*deg, 1*deg, n, 0., 2*deg)
    simulation = ba.ScatteringSimulation(beam, sample, detector)
    return simulation


if __name__ == '__main__':
    sample = get_sample()
    simulation = get_simulation(sample)
    result = simulation.simulate()
    bp.plot_datafield(result)
    bp.plt.show()
auto/Examples/scatter2d/CoreShellNanoparticles.py