C₁₈H₃₄O₂ (Oleic acid)

2 datasets, together covering 0.495–13.33 µm. Default: Jones et al. 2015: n 0.595–0.670 µm.

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Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# C18H34O2 (Oleic acid): Jones et al. 2015: n 0.595–0.670 µm
c18h34o2 = ls.fetch_refractiveindex("organic", "oleic_acid", "Jones", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c18h34o2.range_nm)  # (495, 670) nm
eps = c18h34o2.eps([633])  # complex permittivity

Downloads the original record once (pinned to the imported snapshot) and caches it.

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_4c228191f2a4/lightsmith"
c18h34o2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c18h34o2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (oleic-acid/jones-2015).

# ... load c18h34o2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c18h34o2)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=495, stop_nm=670, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength

Same spec runs with DDA, FDTD, BEM or T-matrix: ls.compare(sim, ["mie", "dda"]).

Materials guide Open a sphere of it in Studio Quick start Ask the community

Lightsmith is open source (MIT): Mie, T-matrix, BEM, DDA, FDTD, RCWA, TMM, mode solvers and inverse design behind one spec, on CPU or GPU. GitHub.

About C18H34O2 (Oleic acid)

Oleic acid is a monounsaturated omega-9 fatty acid commonly found in various animal and vegetable fats and oils. It is a colorless or pale yellow liquid at room temperature with a mild odor and taste. Oleic acid is widely used in the manufacturing of soaps, detergents, and lotions, and serves as an emulsifying agent in the pharmaceutical industry. In materials science, it is often utilized as a surfactant and in the synthesis of nanoparticles due to its ability to stabilize particles in solution. Chemical formula: CH₃(CH₂)₇CH=CH(CH₂)₇COOH

Other names: oleic_acid, C18H34O2, Oleic acid, C₁₈H₃₄O₂, (9Z)-Octadec-9-enoic acid, Cis-9-Octadecenoic acid, Elainic acid, Red oil, Omega-9 fatty acid

API: /v1/materials/mat_9198b2aaa89d · slug oleic-acid