Organic bistable memory switching phenomena and H-like aggregates in squarylium dye Langmuir–Blodgett films

Kushida, Masahito; Imaizumi, Yoshiaki; Harada, Kieko; Sugita, Kazuyuki

doi:10.1016/j.tsf.2005.09.136

Cited by 7 publications

(5 citation statements)

References 10 publications

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“…Many small-molecule organic semiconductors have been used as the "insulator" in MIM devices, including anthracene, [22] pentacene, [23] Alq 3 , [24,25] TPD, [26] AIDCN, [27] several fluorescent dyes with various electron withdrawing substituents, [28,29] a fluorene-anthracene derivative, [30] and LangmuirBlodgett (LB) films of squarilium dye. [31] Improved films containing anthracene are obtained by tethering it as side-chains in a PMMA copolymer. [32] Molecularly doped polymers, assembled layer-by-layer using electrostatic self-assembly, have also been tested, for example, nickel phthalocyanine [33] or rose-bengal [34,35] in a host of poly(allylamine hydrochloride).…”

Section: Reviewmentioning

confidence: 99%

Nonvolatile Memory Elements Based on Organic Materials

2007

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Many organic electronic devices exhibit switching behavior, and have therefore been proposed as the basis for a nonvolatile memory (NVM) technology. This Review summarizes the materials that have been used in switching devices, and describes the variety of device behavior observed in their charge–voltage (capacitive) or current–voltage (resistive) response. A critical summary of the proposed charge‐transport mechanisms for resistive switching is given, focusing particularly on the role of filamentary conduction and of deliberately introduced or accidental nanoparticles. The reported device parameters (on–off ratio, on‐state current, switching time, retention time, cycling endurance, and rectification) are compared with those that would be necessary for a viable memory technology.

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Section: Reviewmentioning

confidence: 99%

Nonvolatile Memory Elements Based on Organic Materials

2007

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“…Thus, it is relatively easy to form a periodic system in direction of out-plane of LB films. It is necessary for the formation of the molecular electronic devices, but it remains difficult to form the in-plane patterns of LB films with the present techniques [4,5]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Orientation of J-aggregate molecules in Langmuir film and Langmuir–Blodgett films of merocyanine dyes mixed with arachidic acid and n-octadecane and irradiation effect of visible light

et al. 2008

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“…On the other hand, surfactants act as water pollutants, a hot topic in environmental research . The specific electric, magnetic, optical, conducting, catalytic, and other properties of monolayers as well as their self-assembly aptitude offer a wealth of technical applications, some of which have already found practical implementation in Langmuir−Blodgett films. − Knowledge of the structure of insoluble monolayers along the entire surface potential/area isotherm is of critical importance for monolayer utilization in nanodevices and as nanoparticle building blocks. For instance, realization of magnetic ordering in molecular magnets could be accomplished by achieving predefined monolayer structural parameters …”

Section: Introductionmentioning

confidence: 99%

Dielectric Properties Tangential to the Interface in Model Insoluble Monolayers: Theoretical Assessment

et al. 2008

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Studies of insoluble monolayers built of phospholipids and various long-chained fatty acids or their glycerin esters are the major source for what is currently known about the relationship between monolayer composition and physicochemical properties. The surface pressure, dipole moment, dielectric permittivity, polarizability, refractivity, and other electrical and optical features are governed by the surfactant structural specificity and solvent organization at the microscopic level. To provide insight into the atomistic details of the interfacial structure, model monolayers at the air/water interface of two distinctly different in composition and isotherm profile surfactants are investigated by means of molecular dynamics all-atom simulations. Analysis of the computational results allows the estimation of empirically unattainable quantities such as tangential (di)electric properties, their decomposition to surfactant and water contributions, and their relationship with the changes in interfacial molecular organization at different surface concentrations. The employed theoretical approach provides a comprehensive description of interfacial phenomena at the molecular level where the traditional phenomenological investigations are ineffective.

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Organic bistable memory switching phenomena and H-like aggregates in squarylium dye Langmuir–Blodgett films

Cited by 7 publications

References 10 publications

Nonvolatile Memory Elements Based on Organic Materials

Nonvolatile Memory Elements Based on Organic Materials

Orientation of J-aggregate molecules in Langmuir film and Langmuir–Blodgett films of merocyanine dyes mixed with arachidic acid and n-octadecane and irradiation effect of visible light

Dielectric Properties Tangential to the Interface in Model Insoluble Monolayers: Theoretical Assessment

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