Application of De-silylation Strategies to The Preparation of Transition Metal Pnictide Nanocrystals: The Case of FeP
Document Type
Article
Publication Date
9-24-2003
Publication Title
Chemistry of Materials
Abstract
Phase-pure FeP nanoparticles have been synthesized by the reaction of iron(III) acetylacetonate with tris(trimethylsilyl)phosphine at temperatures of 240−320 °C using trioctylphosphine oxide as a solvent and dodecylamine (DA), myristic acid (MA), or hexylphosphonic acid (HPA) as additional capping groups (ligands). The DA-capped particles prepared at 260 °C have an average diameter of 4.65 ± 0.74 nm with FeP being the only observed crystalline phase. Elemental analyses indicate a high percentage yield of FeP (85%) and are consistent with 12% TOPO incorporation in the product. The addition of MA has results similar to those of the addition of DA, whereas addition of HPA seems to inhibit crystallite growth, resulting in very small (ca. 1 nm) or amorphous particles that are difficult to isolate. Magnetic susceptibility data on DA-capped FeP suggest that the moments within each particle are coupled antiferromagnetically, at least over a short range; however, there is no evidence of a Néel transition, in contrast to bulk FeP. It is likely that the FeP particles produced by this route are too small (ca. 5 nm) relative to the magnetic cell (2.9 nm) for the onset of long-range helical antiferromagnetic order, even at low temperatures (5 K) and fields (0.010 T).
Repository Citation
Perera, Susanthri C.; Fodor, Petru S.; Tsoi, Georgy M.; Wenger, Lowell E.; and Brock, Stephanie L., "Application of De-silylation Strategies to The Preparation of Transition Metal Pnictide Nanocrystals: The Case of FeP" (2003). Physics Faculty Publications. 310.
https://engagedscholarship.csuohio.edu/sciphysics_facpub/310
DOI
10.1021/cm034443o
Volume
15
Issue
21
Comments
This work is supported by an NSF-CAREER award (DMR-0094273) and the Institute for Manufacturing Research at Wayne State University. The microscopy was performed at the University of Michigan EMAL on the JEOL 2010F, which was pur-chased under NSF grant DMR-9871177.