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Recent Advances in Molecular Electronics

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Physical Chemistry, Theoretical and Computational Chemistry".

Deadline for manuscript submissions: closed (30 June 2011) | Viewed by 19116

Special Issue Editor


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Guest Editor
Laboratoire de Chimie de Coordination, Centre National de la Recherche Scientifique, 205, route de Narbonne, 31077 Toulouse, CEDEX 04, France
Interests: spin crossover; nanomaterials; molecular dynamics

Special Issue Information

Dear Colleagues,

The molecular scale is increasingly being considered as a possible solution for the miniaturization of the components used in the construction of working devices. Molecule-based devices offer remarkable prospects for sensitivity and selectivity levels that cannot be reached with conventional solid-state materials. It is however necessary, to reproduce traditional electronic functions. This is issue is dedicated to different research topics from Synthesis to Solid State Physics, Nanotechnology and Theory of molecular materials based on Inorganic and Organometallic chemistry with specific focus on NanoElectronics, Spin Crossover Molecular Materials, Switchable Molecular Materials, Switchable nanoparticles, Molecular Magnetism, Photo-Magnetism, Thin films and Nano-Structures, Single Molecular Materials, Conducting Molecular Materials, Dielectric Properties, Spectroscopic techniques, Ultrafast spectroscopies, Structural studies, Phase transition phenomena, Statistical and Quantum Theories, bringing our knowledge towards new frontiers of materials science.

Prof. Dr. Azzedine Bousseksou
Guest Editor

Keywords

  • nanoelectronics
  • spintronics
  • qubits
  • spin crossover molecular materials
  • switchable molecular materials
  • switchable nanoparticles
  • single switchable nanomaterials
  • molecular magnetism
  • photo-magnetism
  • thin films and nano-structures
  • single molecular magnets
  • conducting molecular materials
  • dielectric properties
  • spectroscopic techniques
  • ultrafast spectroscopies
  • structural studies
  • phase transition phenomena
  • statistical and quantum t+heories

Published Papers (2 papers)

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1204 KiB  
Article
Molecular Quantum Spintronics: Supramolecular Spin Valves Based on Single-Molecule Magnets and Carbon Nanotubes
by Matias Urdampilleta, Ngoc-Viet Nguyen, Jean-Pierre Cleuziou, Svetlana Klyatskaya, Mario Ruben and Wolfgang Wernsdorfer
Int. J. Mol. Sci. 2011, 12(10), 6656-6667; https://doi.org/10.3390/ijms12106656 - 10 Oct 2011
Cited by 107 | Viewed by 10581
Abstract
We built new hybrid devices consisting of chemical vapor deposition (CVD) grown carbon nanotube (CNT) transistors, decorated with TbPc2 (Pc = phthalocyanine) rare-earth based single-molecule magnets (SMMs). The drafting was achieved by tailoring supramolecular π-π interactions between CNTs and SMMs. The magnetoresistance [...] Read more.
We built new hybrid devices consisting of chemical vapor deposition (CVD) grown carbon nanotube (CNT) transistors, decorated with TbPc2 (Pc = phthalocyanine) rare-earth based single-molecule magnets (SMMs). The drafting was achieved by tailoring supramolecular π-π interactions between CNTs and SMMs. The magnetoresistance hysteresis loop measurements revealed steep steps, which we can relate to the magnetization reversal of individual SMMs. Indeed, we established that the electronic transport properties of these devices depend strongly on the relative magnetization orientations of the grafted SMMs. The SMMs are playing the role of localized spin polarizer and analyzer on the CNT electronic conducting channel. As a result, we measured magneto-resistance ratios up to several hundred percent. We used this spin valve effect to confirm the strong uniaxial anisotropy and the superparamagnetic blocking temperature (TB ~ 1 K) of isolated TbPc2 SMMs. For the first time, the strength of exchange interaction between the different SMMs of the molecular spin valve geometry could be determined. Our results introduce a new design for operable molecular spintronic devices using the quantum effects of individual SMMs. Full article
(This article belongs to the Special Issue Recent Advances in Molecular Electronics)
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850 KiB  
Communication
Spin Transition Sensors Based on β-Amino-Acid 1,2,4-Triazole Derivative
by Marinela M. Dîrtu, France Schmit, Anil D. Naik, Aurelian Rotaru, J. Marchand-Brynaert and Yann Garcia
Int. J. Mol. Sci. 2011, 12(8), 5339-5351; https://doi.org/10.3390/ijms12085339 - 18 Aug 2011
Cited by 21 | Viewed by 8142
Abstract
A β-aminoacid ester was successfully derivatized to yield to 4H-1,2-4-triazol-4-yl-propionate (βAlatrz) which served as a neutral bidentate ligand in the 1D coordination polymer [Fe(βAlatrz)3](CF3SO3)2·0.5H2O (1·0.5H [...] Read more.
A β-aminoacid ester was successfully derivatized to yield to 4H-1,2-4-triazol-4-yl-propionate (βAlatrz) which served as a neutral bidentate ligand in the 1D coordination polymer [Fe(βAlatrz)3](CF3SO3)2·0.5H2O (1·0.5H2O). The temperature dependence of the high-spin molar fraction derived from 57Fe Mossbauer spectroscopy recorded on cooling below room temperature reveals an exceptionally abrupt single step transition between high-spin and low-spin states with a hysteresis loop of width 4 K (Tc = 232 K and Tc = 228 K) in agreement with magnetic susceptibility measurements. The material presents striking reversible thermochromism from white, at room temperature, to pink on quench cooling to liquid nitrogen, and acts as an alert towards temperature variations. The phase transition is of first order, as determined by differential scanning calorimetry, with transition temperatures matching the ones determined by SQUID and Mössbauer spectroscopy. The freshly prepared sample of 1·0.5H2O, dried in air, was subjected to annealing at 390 K, and the obtained white compound [Fe(βAlatrz)3](CF3SO3)2 (1) was found to exhibit a similar spin transition curve however much temperature was increased by (Tc = 252 K and Tc = 248 K). The removal of lattice water molecules from 1·0.5H2O is not accompanied by a change of the morphology and of the space group, and the chain character is preserved. However, an internal pressure effect stabilizing the low-spin state is evidenced. Full article
(This article belongs to the Special Issue Recent Advances in Molecular Electronics)
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