Films of Mn 12-acetate deposited by low-energy laser ablation

Journal of Magnetism and Magnetic Materials (Impact Factor: 2). 01/2004; 284:215-219. DOI: 10.1016/j.jmmm.2004.06.057
Source: arXiv

ABSTRACT Thin films of the molecular magnet Mn12-acetate, [Mn12O12(CH3COO)16(H2O)4]·2CH3COOH·4H2O, have been prepared using a laser ablation technique with a nitrogen laser at low laser energies of 0.8 and 2mJ. Chemical and magnetic characterizations show that the Mn12-acetate cores remain intact and the films show similar magnetic properties to those of the parent molecular starting material. In addition, the magnetic data exhibit a peak in the magnetization at 27K indicating the creation of an additional magnetic phase not noted in previous studies of crystalline phases.

  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: We report the fabrication of the artificial nanopatterns of Mn <sub>12</sub> -acetate films using e-beam lithography. Scanning electron micrographs and atomic force micrographs of the patterns reveal the minimum lateral size (∼50 nm ) , height, and surface morphology of the patterns. X-ray photoelectron spectroscopy data indicate the presence of Mn <sub>12</sub> -acetate in the patterned structure. The thin film material indicates magnetic properties consistent with Mn <sub>12</sub> -acetate, supporting the conclusion that the lithographic chemicals used in this study do not interfere with the core properties of Mn <sub>12</sub> -acetate. The successful fabrication of Mn <sub>12</sub> -acetate nanopatterns enables a range of possibilities for designed hybrid systems with three-dimensional positional control on the nanometer scale.
    Journal of Applied Physics 12/2007; · 2.21 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Single molecule magnets based on the dodecamanganese (III, IV) cluster with two different types of ligand (acetate and benzoate) have been studied on the Au(111) surface. Due to the non-volatile and fragile nature of the molecules, we have used ultra-high vacuum electrospray deposition to produce a series of surface coverages from a fraction of a monolayer to multilayer films in both cases. Synchrotron radiation based electron spectroscopy has been used to study the adsorption of the molecules on the Au(111) surface and the effect that this has on the oxidation states of the manganese atoms in the core. In both cases, reduction of the core is observed due to the interaction with the surface, to essentially the same extent despite substantial differences in the size and nature of the ligand shell.
    Nanotechnology 01/2011; 22(7):075704. · 3.84 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Different approaches to the deposition of Mn(12) single molecule magnets on the Au(111) surface and their characterization by a broad variety of techniques are investigated with respect to their suitability for a profound corroboration of the integrity of the Mn(12) core. In this context, the most recent improvements in the experimental approaches are presented and the latest results on the electronic properties of Mn(12) are linked to each other. The results confirm the high instability of Mn(12) single molecule magnets on surfaces and reveal the need for an amendment of the requirements to define the structural integrity of Mn(12) molecules on surfaces.
    Dalton Transactions 02/2008; · 3.81 Impact Factor

Full-text (2 Sources)

Available from
May 21, 2014