One-Pot Synthesis of Large FePt Nanoparticles from Metal Salts and Their Thermal Stability

Abstract

One-pot synthesis of FePt nanoparticles larger than 5 nm with controlled composition has been developed by the polyol reduction of platinum acetylacetonate and iron acetylacetonate in excess ligands. The obtained large FePt nanoparticles (6.1 +/- 0.6 nm Fe36Pt64, 5.8 +/- 0.7 nm Fe44Pt56, and 5.1 +/- 0.7 nm Fe49Pt51 nanoparticles) were thermally more stable than the small ones and were hard to coalesce in the in-plane direction for their 2D superlattice.

Platinum–Copper Nanoframes: One‐Pot Synthesis and Enhanced Electrocatalytic Activity

“…Eur.J.2016, 22,4960 -4965 www.chemeurj.org À1 ,w hich is demonstratedb yt he existence of two absorptionp eaks at 3295 and 3371 cm À1 on the spectrum of OAm. [13] When Pt(acac) 2 was put into OAm, the most obvious change was that one wide peak at the same range replacet he two peaks of NÀH, indicatingt he complex of Pt(acac) 2 and OAm. But when Pt(acac) 2 ,O Am, and CTAC were mixed together,t wo peaks at 3290 and 3348 cm À1 reappeared on the spectrum.…”

Nucleation and Growth Mechanism of NixPt1-xNanoparticles

“…Additionally, two small peaks are characteristic for the oleyl group: the peak at 3005 cm À1 from n(C-H) mode of the C-H bond adjacent to the double bond, and the peak at 1622 cm À1 , which can be assigned to the n(C --C) stretching mode. [19] The spectrum shows a broad peak at 3350 cm À1 , which originates either from the n(N-H) stretching of the NH 2 group of oleylamine [20] or the n(O-H) stretching mode of water, whereas the peak at 1585 cm À1 arises from the n(N-H) scissoring mode and indicates that the N-H bonds are intact and that oleylamine binds undissociated to the nanoparticles surface. [19,21] The small peak at 1707 cm À1 is due to the n(C --O) mode of the carboxylic acid.…”

Strategic green synthesis and characterization of Au/Pt/Ag trimetallic nanocomposites

“…The nanoscaled particles usually show changes in the physical and chemical properties when compared to bulk materials [1,2]. They are found to be useful in various ways in semiconductors [3], catalysis [4][5][6][7], electro-optic materials [8], magnetic materials [9][10][11], drug delivery materials [12] and so on and thus are attracted to many scientists. According to the concept of electronic effect in trimetallic nanoparticles a ''triple core-shell structure'', in which one element forms a core, the second element covers the core, forming an interlayer, and the third element covers the interlayer, forming a shell, has been proposed [2].…”