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#!/usr/bin/env python3
# /// script
# requires-python = ">=3.10"
# dependencies = ["bornagain>=25,<26"]
# ///
"""
Core shell nanoparticles.
Alternative implementation using particle composition
"""
import bornagain as ba
ba.require_versions("bornagain>=25,<26")
from bornagain import deg, nm, R3
def get_sample():
"""
A sample with box-shaped core-shell particles on top of air.
"""
# Materials
diff_color = (0.86, 0.24, 0.18)
diff_mat = ba.RefractiveMaterial("Core", diff_color, -4e-6, 0)
shell_color = (0.25, 0.65, 0.35)
shell_mat = ba.RefractiveMaterial("Shell", shell_color, 1e-5, 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(diff_mat, ff_1)
shell = ba.Particle(shell_mat, ff_2)
particle = ba.Compound()
particle.addComponent(shell)
particle.addComponent(core, R3(0, 0, 0.5*nm))
# Sample with particles in vacuum over vacuum substrate
layer_1 = ba.Layer(ba.Vacuum())
layer_1.deposit2D(ba.Dilute2D(0.001, particle))
layer_2 = ba.Layer(ba.Vacuum())
sample = ba.Sample()
sample.addLayer(layer_1)
sample.addLayer(layer_2)
return sample
def get_simulation(sample):
beam = ba.Beam(1e9, 0.1*nm, 0.2*deg)
n = 200
detector = ba.SphericalDetector(n, 0., 2*deg, n, 0., 2*deg)
simulation = ba.ScatteringSimulation(beam, sample, detector)
return simulation
if __name__ == '__main__':
sample = get_sample()
ba.showSample3D(sample, sample_size=120*nm, seed=0)
simulation = get_simulation(sample)
result = simulation.simulate()
ba.plot_datafield(result, unit_aspect=1)
ba.plt.show()
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BornAgain
≻ git-develop
≻ Documentation ≻ Examples ≻ GISAS ≻ Particles, layers, and interfaces ≻ Core shell nanoparticles 2
