Hybrid organic–inorganic materials for molecular proton memory devices

Kapetanakis, E.; Douvas, Antonios M.; Velessiotis, D.; Makarona, Eleni; Argitis, Panagiotis; Γλέζος, Ν.; Normand, P.

doi:10.1016/j.orgel.2009.03.005

Cited by 9 publications

(9 citation statements)

References 34 publications

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“…[8][9] Indeed POM-based hybrid materials have the potential for applications in sensors, [10][11][12] electro-and photochromic devices, [13,14] fuel cells, [15] photovoltaic cells, [16] energy storage, [17] and molecular electronics. [18] An attractive perspective is the realization of multilevel molecular memories based on semiconducting nanowire field effect transistors [19] or hybrid molecular-silicon capacitors [20] by using POMs as redox-active components. [21] The feasibility of such a project is supported by recent results from the groups of Glezos [18a, 22] and Tour [23] on electron transport or charge confinement in POM-based molecular devices.…”

Section: Introductionmentioning

confidence: 99%

Organosilyl/‐germyl Polyoxotungstate Hybrids for Covalent Grafting onto Silicon Surfaces: Towards Molecular Memories

Joo

Renaudineau

Delapierre

et al. 2010

Chemistry A European J

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Organosilyl/-germyl polyoxotungstate hybrids [PW(9)O(34)(tBuSiO)(3)Ge(CH(2))(2)CO(2)H](3-) (1a), [PW(9)O(34)(tBuSiO)(3)Ge(CH(2))(2)CONHCH(2)C[triple bond]CH](3-) (2 a), [PW(11)O(39)Ge(CH(2))(2)CO(2)H](4-) (3a), and [PW(11)O(39)Ge(CH(2))(2)CONHCH(2)C[triple bond]CH](4-) (4a) have been prepared as tetrabutylammonium salts and characterized in solution by multinuclear NMR spectroscopy. The crystal structure of (NBu(4))(3)1a.H(2)O has been determined and the electrochemical behavior of 1a and 2a has been investigated by cyclic voltammetry. Covalent grafting of 2a onto an n-type silicon wafer has been achieved and the electrochemical behavior of the grafted clusters has been investigated. This represents the first example of covalent grafting of Keggin-type clusters onto a Si surface and a step towards the realization of POM-based multilevel memory devices.

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Section: Introductionmentioning

confidence: 99%

Organosilyl/‐germyl Polyoxotungstate Hybrids for Covalent Grafting onto Silicon Surfaces: Towards Molecular Memories

Joo

Renaudineau

Delapierre

et al. 2010

Chemistry A European J

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“…The materials used in the present study are poly(methyl methacrylate) (PMMA) polymeric matrices doped with a Keggin-type polyoxometalate (POM) anion in the form of heteropolyacid H 3 [PW 12 O 40 ]. The methodology followed to prepare such organic–inorganic hybrid materials was as described in the literature. , The mobile ions of the POM–PMMA electrolyte system are in the form of protons. FD and TD measurements were performed with two-terminal cells consisting of metal/POM–PMMA/metal (MEM) and metal/POM–PMMA/SiO 2 /metal (MEOM) structures.…”

Section: Experimental Sectionmentioning

confidence: 99%

Direct Current Conductivity of Thin-Film Ionic Conductors from Analysis of Dielectric Spectroscopic Measurements in Time and Frequency Domains

et al. 2016

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A method is developed for extracting the direct current conductivity (σdc) of ion-conducting materials from frequency- and time-domain dielectric spectroscopy measurements. This method exploits the electrode polarization effects arising from the charging of an ion-blocking capacitor and provides a useful way of obtaining σdc for ionic conductors that do not exhibit a frequency- (time-) independent conductivity plateau; the latter absence of plateau is often encountered in the case of thin-film materials. It allows, by proper design of the test cells, the estimation of σdc independently of the specimen thickness, as demonstrated herein for SiO2 blocking layers and electrolyte systems made of a polyoxometalate (POM) molecule embedded in poly(methyl methacrylate) (PMMA) polymeric matrices. For different postpreparation and measurement conditions, the σdc values obtained for thick (8 μm) POM–PMMA layers are in good agreement not only with the observed conductivity plateaus but also with the values determined in the case of thin (270 nm) POM–PMMA layers for which no plateau is detected. The proposed method allows for the probing of a possible dependence of material properties on thickness and is of substantial interest for low-dimensional systems. The applicability and accuracy of the method are discussed and assessed in relation to the main methods currently used in the field.

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“…Even though the main interest for these molecular systems is in the field of catalysis, many other potential applications such as electrochemical displays, chemical sensors, capacitors, memory, and electrochemical cells have all been proposed [30][31][32][33]. POMs have one important characteristic, namely that they can accept one or more electrons without undergoing significant structural changes.…”

Section: Introductionmentioning

confidence: 99%

“…POMs can also be characterized as zerodimension semiconductors [35]. To date the transport properties of this vast class of molecules have been extensively investigated in experiments designed around POM embedded in polymetric matrices or thin films [30,32,[35][36][37][38]. To the best of our knowledge however there is no investigation available of the electronic transport through POMs at the single molecular level, although this can certainly contribute to the understanding of the electron transfer process in such compounds.…”

Section: Introductionmentioning

confidence: 99%

First principle investigation of transport properties of Lindqvist derivatives based molecular junction

Wen

Guan

et al. 2012

Journal of Molecular Graphics and Modelling

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Hybrid organic–inorganic materials for molecular proton memory devices

Cited by 9 publications

References 34 publications

Organosilyl/‐germyl Polyoxotungstate Hybrids for Covalent Grafting onto Silicon Surfaces: Towards Molecular Memories

Organosilyl/‐germyl Polyoxotungstate Hybrids for Covalent Grafting onto Silicon Surfaces: Towards Molecular Memories

Direct Current Conductivity of Thin-Film Ionic Conductors from Analysis of Dielectric Spectroscopic Measurements in Time and Frequency Domains

First principle investigation of transport properties of Lindqvist derivatives based molecular junction

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