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Special Issue "Recent Advances in Molecular Electronics"

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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)

Special Issue Editor

Guest Editor
Prof. Dr. Azzedine Bousseksou (Website)

Laboratoire de Chimie de Coordination, Centre National de la Recherche Scientifique, 205, route de Narbonne 31077 Toulouse Cedex 04, France
Phone: +33 5 61 33 31 53
Fax: +33 5 61 55 30 03

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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Research

Open AccessArticle Molecular Quantum Spintronics: Supramolecular Spin Valves Based on Single-Molecule Magnets and Carbon Nanotubes
Int. J. Mol. Sci. 2011, 12(10), 6656-6667; doi:10.3390/ijms12106656
Received: 18 July 2011 / Revised: 14 September 2011 / Accepted: 26 September 2011 / Published: 10 October 2011
Cited by 34 | PDF Full-text (1204 KB) | HTML Full-text | XML Full-text
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 [...] 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)
Open AccessCommunication Spin Transition Sensors Based on β-Amino-Acid 1,2,4-Triazole Derivative
Int. J. Mol. Sci. 2011, 12(8), 5339-5351; doi:10.3390/ijms12085339
Received: 11 July 2011 / Revised: 11 August 2011 / Accepted: 12 August 2011 / Published: 18 August 2011
Cited by 15 | PDF Full-text (850 KB) | HTML Full-text | XML Full-text
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· [...] 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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