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30.19

Vật lý

Sự hình thành mẫu tinh thể phân tán hạn chế kết hợp có cấu trúc nano trong hệ thống vi nhũ tương hoạt tính

Nanostructured diffusion-limited-aggregation crystal pattern formation in a reactive microemulsion system

Nanoscience and Nanotechnology

2014

1

1-11

2043-6262

Nanostructured diffusion-limited-aggregation (DLA) crystal pattern formation in microemulsion consisting of water, styrene, cetyltrimethylammonium chloride (CTACI), potassium persulphate and an oscillating Belousov-Zhabotinsky (BZ) reactant is reported. A variety of spatiotemporal patterns like concentric wave, spatial (stripe) and chaotic patterns appear. A colloidal phase composed of numerous nano-sized particles has been observed. The solid phase nucleation has been found to occur in the colloidal phase and has been found to grow in a symmetric crystal pattern with the progress of the reaction finally exhibiting DLA structures. the authors show that the formation of a nanostructured DLA crystal pattern is governed by spatial structures emerging in the BZ microemulsion system. Without any spatial structure in the microemulsion system only hydrogel of high viscosity is formed. A nano-sized branched crystal pattern was formed with a particle diameter in the range of 60-100 nm, as evident by transmission electron microscope, powder X-ray diffraction and particle size analyser studies.

TTKHCNQG, CLt 740