A New Route to Fabricate Monolayers of Magnetite Nanoparticles on Silicon

Altavilla, Claudia; Ciliberto, Enrico; Gatteschi, Dante; Sangregorio, Claudio

doi:10.1002/adma.200401600

Cited by 53 publications

(46 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It should be noticed that similar effects seem to have been detected, even though not deeply investigated, also on the dynamics of magnetic nanoparticles. [25] The absence of hysteresis for 4 anchored on Au(111) surface is in contradiction with a previous report on a similar sample prepared by grafting clusters of 2 on a prefunctionalized Au(111) surface.…”

contrasting

confidence: 74%

Magneto‐Optical Investigations of Nanostructured Materials Based on Single‐Molecule Magnets Monitor Strong Environmental Effects

et al. 2007

Self Cite

View full text Add to dashboard Cite

The determination of the magnetic properties of molecular magnets in environments similar to those used in spintronic devices is fundamental for the development of applications. Single-molecule magnets (SMMs) are molecular cluster systems that display magnetic hysteresis of dynamical origin at low temperature. [1,2] As they behave like perfectly monodisperse nanomagnets and show clear macroscopic quantum effects in their magnetic properties, [3] they are extremely appealing candidates for the forthcoming generation of molecular devices: they have been proposed as efficient systems for quantum computation, [4] ultra-high-density magnetic recording media, [5] and molecular spintronic systems. [6][7][8] These attractive possibilities have stimulated the creativity of chemists and materials scientists in developing several different ways of organizing such systems into addressable nanostructured materials. In particular inclusion into Langmuir-Blodgett (LB) films, [9] mesoporous silica, [10] polymeric matrices, [11] and ultrathin films [12] have been devised and studied. The most appealing approaches, both from the applicative and speculative points of view, are the functionalization and binding of such clusters on conducting surfaces [13,14] as well as their incorporation into break-junctions, [6][7][8]15] where a single molecule is directly accessible. These results have led to the creation of the first SMM-based molecular spintronic devices, [15] in which the electronic transport properties are modulated by the magnetic state of a single SMM cluster. The considerable difficulties linked to the interpretation of such results have recently stimulated much theoretical work, [6][7][8] and a number of predictions have been made. Both topological [8] and quantum tunneling [7] effects on the transport in the Kondo regime have been predicted, and several peculiar fingerprints of the SMM behavior should be apparent in transport measurements. [6,15] Interesting effects are also predicted when addressing a SMM on a surface with a tunneling current. [16] Although the influence of the surroundings on the magnetic properties of SMMs has been pointed out in several theoretical and experimental works, [17] our understanding of SMM behavior almost totally relies on measurements performed on crystalline samples. Magnetic measurements on SMMs that lie in environments similar to those of spintronic devices have not been reported up to now, mainly because of the very high sensitivity required. In this Communication we try to fill this void by using high-sensitivity instrumentation, based on magneto-optical (MO) techniques on a variety of materials.

show abstract

contrasting

confidence: 74%

Magneto‐Optical Investigations of Nanostructured Materials Based on Single‐Molecule Magnets Monitor Strong Environmental Effects

et al. 2007

Self Cite

View full text Add to dashboard Cite

show abstract

“…1a shows the TEM image of as prepared nanoparticles covered with oleic acid and oleyl amine. From the TEM image it has been observed that the particles are not spherical rather show irregular potato-like shape as has been previously observed for magnetite nanoparticles [13]. The size distribution, obtained from a statistical analysis over 100 nanoparticles, is shown in Fig.…”

Section: Synthesis Of P(alkylma)s-coated Iron Oxide Nanoparticlesmentioning

confidence: 68%

“…Many research groups have fabricated magnetic thin films using various techniques: Langmuir-Blodgett (LB) technique, layer-by-layer (LbL) deposition, self-assembly, electrophoretic deposition, and so on [13][14][15][16][17][18]. Among those techniques, the LB technique is an effective way to produce a twodimensional (2D) closely packed thin films of various nanoparticles [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Side-chain effect on Langmuir and Langmuir–Blodgett film properties of poly(N-alkylmethacrylamide)-coated magnetic nanoparticle

Parvin

Matsui

Sato

et al. 2007

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…With this approach the stability of the films is strongly improved by introducing appropriate linkers with suitable terminal functionalities that anchor the MNPs to the surface. Beyond the stability gain, this approach clearly favors the monolayer distribution of the MNPs over the substrate instead of the formation of multilayers 66, 67. The use of the linkers can be done in three different ways: (i) functionalization of the MNPs with linkers bearing terminal groups able to react with the surface, (ii) functionalization of the surface with linkers bearing terminal groups able to react with the MNPs, and (iii) a combination of both of these methods ( Figure ).…”

Section: Assisted Self‐assembly and Organizationmentioning

confidence: 99%

Structuration and Integration of Magnetic Nanoparticles on Surfaces and Devices

Bellido

Domingo

Ojea-Jiménez

et al. 2012

Small

View full text Add to dashboard Cite

Different experimental approaches used for structuration of magnetic nanoparticles on surfaces are reviewed. Nanoparticles tend to organize on surfaces through self-assembly mechanisms controlled by non-covalent interactions which are modulated by their shape, size and morphology as well as by other external parameters such as the nature of the solvent or the capping layer. Further control on the structuration can be achieved by the use of external magnetic fields or other structuring techniques, mainly lithographic or atomic force microscopy (AFM)-based techniques. Moreover, results can be improved by chemical functionalization or the use of biological templates. Chemical functionalization of the nanoparticles and/or the surface ensures a proper stability as well as control of the formation of a (sub)monolayer. On the other hand, the use of biological templates facilitates the structuration of several families of nanoparticles, which otherwise may be difficult to form, simply by establishing the experimental conditions required for the structuration of the organic capsule. All these experimental efforts are directed ultimately to the integration of magnetic nanoparticles in sensors which constitute the future generation of hybrid magnetic devices.

show abstract

A New Route to Fabricate Monolayers of Magnetite Nanoparticles on Silicon

Cited by 53 publications

References 25 publications

Magneto‐Optical Investigations of Nanostructured Materials Based on Single‐Molecule Magnets Monitor Strong Environmental Effects

Magneto‐Optical Investigations of Nanostructured Materials Based on Single‐Molecule Magnets Monitor Strong Environmental Effects

Side-chain effect on Langmuir and Langmuir–Blodgett film properties of poly(N-alkylmethacrylamide)-coated magnetic nanoparticle

Structuration and Integration of Magnetic Nanoparticles on Surfaces and Devices

Contact Info

Product

Resources

About