Architectural Control of Hierarchical Nanobelt Superstructures in Catanionic Reverse Micelles

Abstract

BaXO4 (X = Mo, W) nanobelts and a variety of hierarchical superstructures assembled from the nanobelts have been synthesized in a catanionic reverse‐micelle system. The effects of various factors, such as the mixing ratio (r) between the anionic and cationic surfactants, the temperature, and the presence of polymeric additives, on the formation of the nanobelts and their hierarchical assembly have been examined in detail. In particular, r has been shown to be powerful in modulating the formation and assembly of the BaMoO4 and BaWO4 nanobelts. Architectural control of the penniform nanobelt superstructures has been readily achieved by changing the experimental parameters. A plausible two‐stage growth mechanism has been proposed for the formation of penniform BaXO4 nanobelt superstructures in catanionic reverse micelles.

Novel Shape Evolution of BaMoO4 Microcrystals

“…The root area that connects the stem is much thinner than the middle part of the branch, which means that the branches also grow rapidly along the [100] and [010] directions. Unlike in the previous studies of other dendritic materials, [7][8][9][10][11][12]16,17 the branches did not grow further along the direction of the stem to form a penniform morphology. In contrast, the branches in the current study grew rapidly along three directions: [001], [100], and [010].…”

Crystal hierarchically splitting in growth of BaWO4 in positive cat–anionic microemulsion

“…3c) can be indexed as a tetragonal phase of single-crystal BaWO 4 recorded from the [0 1 0] zone axis. These results show that the nanofilament grows along the [0 0 1] direction, which is consistent with previous works [6,8,14,15,17].…”

Controlled growth of BaMoO4 hierarchical superstructures in functionalized ionic liquids

“…The penniform BaMoO 4 nanostructures mentioned in the introduction are similar to the dendritic structures in some ways [32]. It is noteworthy that the stems of penniform BaMoO 4 are grown along the [100] direction and the branches are grown along the [001] direction.…”