Figure 8
(A–C) shows the HRTEM images of aged In2S3 QD sample with larger sized In2S3 QD embedded in the matrix of molecular aggregates. Yellow circles indicate the highlighted portions of the image showing the presence of molecular aggregates (A). In2S3 quantum dots embedded in the Oleylamine–Acetone molecular aggregates is clearly seen in (B). (D) is the High resolution image of the molecular aggregates present in the In2S3 QD sample and which is similar to the HRTEM image as seen before in the molecular system. (E,F) are the HRTEM images of In2S3 QD showing an average size of 19 nm. The presence of molecular aggregates in the In2S3 QD system indicated a fact that the aging assisted process has removed the Oleylamine from QD surface and hence the size of the quantum dot gets increased after aging process.
