Synthesis of Cubic Antiferromagnetic KMnF3 Nanoparticles Using Reverse Micelles and Their Self-Assembly

Abstract

Cubic antiferromagnetic nanoparticles of KMnF3 (see Figure) have been prepared and their synthesis as well as their properties are described in this communication. Small, ordered domains of about 350 nm size were obtained. The narrow size distribution provided by the reverse micelle technique allows the particles to self‐assemble into a well‐ordered array. Work towards bigger ordered areas is currently in progress.

A simple mixed surfactant route for the preparation of noble metal dendrites

“…Firstly, two portions of different solutions were prepared, as follows: Solution A, 3.0 g CTAB, 3.0 ml 1-butanol, 16.0 ml octane and 3.0 ml distilled water were added to a reaction vessel and then continuously stirred to form a transparent reverse microemulsion [16]. The final concentration of CTAB was 0.374 mol l À1 .…”

Growth of BaWO4 fishbone-like nanostructures in w/o microemulsion

“…A typical synthesis of BaWO 4 fishbone-like nanostructures was as follows: A 0.02 mol L −1 BaCl 2 or 0.01 mol L −1 Na 2 WO 4 solution was added to an n-octane/CTAB/ n-butanol system [20]. After 10 min of vigorous agitation, equivalent volumes of two separate microemulsion solutions containing BaCl 2 or Na 2 WO 4 were mixed rapidly, to give a final molar ratio of [Ba 2+ ]/[WO 2− 4 ] = 2 and water content w = [H 2 O]/[CTAB] (molar ratio) = 34.…”

Green Synthesis and Property Characterization of Single‐Crystalline Perovskite Fluoride Nanorods

“…The two curves display antiferromagnetic behavior, as previously detected in KMnF 3 nanoparticles. [10,28] The ZFC and FC plots diverge from each other at around 87 K, corresponding to the reported Néel temperature of T N = 88 K. [53] Above T N , the two curves are coincident, and moreover obey the Curie-Weiss law, v = C / (T -H), with a calculated paramagnetic Curie temperature of T C = -192.6 K, which is comparable with the previously reported value of -191.7 K for this system. [28] A detailed plot of the inverse magnetic susceptibility (1/v) vs. temperature (K) used to calculate T C is shown in Figure 6B.…”

“…[25] Regarding previous work with these materials, to the best of our knowledge, whereas nanoscale motifs of KMnF 3 and NH 4 MnF 3 have been produced, their one-dimensional (1-D) nanostructured analogues have not as yet been fabricated. [26][27][28][29] In terms of NH 4 MnF 3 , nanocrystallites measuring 10 to 60 nm have been synthesized using a microemulsion technique with size control obtained by varying aqueous phase content, salt concentration, synthesis temperature, and mixing time of reagents. [26] In addition, (100)-oriented NH 4 MnF 3 perovskites with different morphologies have been synthesized in situ using an organic template.…”

“…[27] KMnF 3 nanoparticles, measuring ∼68 nm, have been generated using a reverse micelle technique and self-assembled into periodic arrays. [28] By contrast, comparatively little work, [29] with the exception of a solvothermal synthesis of acicular KMnF 3 nanostructures at 160°C, has been performed on the fabrication and characterization of 1-D structures of ternary metal fluoride nanorods.…”