| Bright-field TEM | Average quantum-dot size: 5.9 nm; size dispersion: 18 % |
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| HAADF-STEM | Most quantum dots were projected as triangles; images aligned along the [110] zone axis fit within an isosceles triangle with apex and base corners of 70 and 55°, respectively, while images aligned along the [111] zone axis were circumscribed by an equilateral triangle |
| iDPC-STEM, [100] zone axis | Crystal lattice parameter: 5.856 ± 0.1 Å |
| Rutherford backscattering, monolayer on MgO, 1.57 MeV He⁺ ions | In:P ratio: 1.1 ± 0.1 after Z⁻² scaling; backscattering from Cl was barely distinguishable |
| XPS | In, P, and Cl were present |
| Photoluminescence | No measurable photoluminescence was observed |
| Femtosecond transient absorption, 190 fs, 650 nm excitation | A band of negative differential absorption was centered at approximately 755 nm; the bleach band shifted slightly to longer wavelengths in the first few picoseconds, then mostly reduced; the bleach-relaxation time constants were approximately 0.3 and 14 ns; approximately 50 % of the maximum bleach remained after 5 ns, and approximately two-thirds of the decay was related to the long-lived component |
| Femtosecond transient absorption, 650–950 nm excitation, 1 ns delay | The bleach spectrum was mostly independent of excitation wavelength; a minor redshift occurred for excitation wavelengths around 750 nm and was undone at longer excitation wavelengths; excitation at 580, 650, or 950 nm yielded the same bleach spectrum |
| Four-exponential global fit of transient bleach at 707 and 757 nm | ΔA₇₀₇: A₁ = 1.30 ± 0.05, A₂ = −0.37 ± 0.02, A₃ = −0.32 ± 0.01, A₄ = −0.48 ± 0.01; ΔA₇₅₇: A₁ = 0.94 ± 0.05, A₂ = 0.47 ± 0.02, A₃ = −0.34 ± 0.01, A₄ = −0.68 ± 0.01; k₁ = 3700 ± 100 ns⁻¹, k₂ = 580 ± 10 ns⁻¹, k₃ = 3.5 ± 0.1 ns⁻¹, k₄ = 0.074 ± 0.006 ns⁻¹ |
| Transient absorption, 820 nm excitation | No initial spectral redshift was observed; the bleach feature persisted after 5 ns of pump–probe delay |
Norick De Vlamynck, Juliette Zito, Kim Corinna Dümbgen, Nadine Schrenker, Jordi Llusar, Ece Arslan Irmak, Jan Matthys, Luca Giordano, Pieter Geiregat, Sandra Van Aert, Sara Bals, Ivan Infante, Zeger Hens. “InP quantum dots, from atomistic reconstruction to opto-electronic properties.” ChemRxiv (). https://doi.org/10.26434/chemrxiv.15007928/v1
Values presented only in micrographs, histograms, spectra, diffraction patterns, transient-absorbance maps, or other plots or images were not transcribed
| Transient absorption, excitation-wavelength scan | Redshifting the excitation wavelength past the band-gap absorption peak shifted the band-gap bleach until the noise floor of the setup was reached |
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