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. 2020 Mar 12;20(6):4102–4110. doi: 10.1021/acs.nanolett.9b05270

Figure 2.

Figure 2

Effect of additional purification on the self-assembly of 4 ML NPLs. (a) NMR spectra of 4 ML NPL before (black line) and after (red line) additional purification. After purification, the peaks assigned to ODE (denoted with *) vanish. (b) TEM micrograph of 4 ML NPLs assembled at the liquid interface in the presence of ODE. The NPLs assembled in the edge-up configuration. (c) TEM micrograph of 4 ML NPLs assembled at the liquid interface in the absence of ODE. The NLPs assembled in the face-down configuration. Clearly, the presence of ODE contamination gave rise to heterogeneity in the assembly process; without ODE, a homogeneous face-down film was produced.