Fig. 1: Adsorption of Se from trioctylphosphine selenide to oleate-capped InP NCs. | Nature Communications

Fig. 1: Adsorption of Se from trioctylphosphine selenide to oleate-capped InP NCs.

From: Heteroepitaxial chemistry of zinc chalcogenides on InP nanocrystals for defect-free interfaces with atomic uniformity

Fig. 1

a Adsorption pathway of Se to oleate-capped InP NCs (InP–OA) via oleate transfer from the surface to trioctylphosphine selenide (SePR’3), yielding oleoyloxytrioctylphosphonium (Intermediate 1). As shown on the right, this compound can be separately prepared by the nucleophilic addition of SePR’3 to diisopropyl azocarboxylate (DIAD) in the form of DIAD–Se–1. b 31P NMR spectra of InP–Se–1 (deep blue) and oleoyloxytrioctylphosphonium–DIAD selenide (DIAD–Se–1, blue). c 77Se NMR spectra of InP–Se–1 (deep blue), DIAD–Se–1 (blue), and SePR’3 (light blue). d Average number of In (red), P (orange) and Se (light blue) atoms per InP NC before (InP–OA) and after the addition of SePR’3 (InP–Se). The hatched region in InP–OA represents the number of Inbound to the oleate ligand. The dashed line indicates the average number of P per InP–OA. Source data are provided as a Source Data file.

Back to article page