Diarylethenes for Memories and Switches

http://sces.phys.utk.edu/mostcited/mc1_1114.pdf

Colossal Magnetoresistant Materials: The Key Role of Phase Separation

Recent startling interest for lanthanide luminescence is stimulated by the continuously expanding need for luminescent materials meeting the stringent requirements of telecommunication, lighting, electroluminescent devices, (bio-)analytical sensors and bio-imaging set-ups. This critical review describes the latest developments in (i) the sensitization of near-infrared luminescence, (ii) “soft” luminescent materials (liquid crystals, ionic liquids, ionogels), (iii) electroluminescent materials for organic light emitting diodes, with emphasis on white light generation, and (iv) applications in luminescent bio-sensing and bio-imaging based on time-resolved detection and multiphoton excitation (500 references).

/pdf/lanthanide-luminescence-for-functional-materials-and-bio-1w9cppwf8r.pdf

Lanthanide luminescence for functional materials and bio-sciences

The semiconductor industry has seen a remarkable miniaturization trend, driven by many scientific and technological innovations. But if this trend is to continue, and provide ever faster and cheaper computers, the size of microelectronic circuit components will soon need to reach the scale of atoms or molecules—a goal that will require conceptually new device structures. The idea that a few molecules, or even a single molecule, could be embedded between electrodes and perform the basic functions of digital electronics—rectification, amplification and storage—was first put forward in the mid-1970s. The concept is now realized for individual components, but the economic fabrication of complete circuits at the molecular level remains challenging because of the difficulty of connecting molecules to one another. A possible solution to this problem is ‘mono-molecular’ electronics, in which a single molecule will integrate the elementary functions and interconnections required for computation.

Electronics using hybrid-molecular and mono-molecular devices

Organic solar cell research has developed during the past 30 years, but especially in the last decade it has attracted scientific and economic interest triggered by a rapid increase in power conversion efficiencies. This was achieved by the introduction of new materials, improved materials engineering, and more sophisticated device structures. Today, solar power conversion efficiencies in excess of 3% have been accomplished with several device concepts. Though efficiencies of these thin-film organicdevices have not yet reached those of their inorganic counterparts (η ≈ 10–20%); the perspective of cheap production (employing, e.g., roll-to-roll processes) drives the development of organic photovoltaic devices further in a dynamic way. The two competitive production techniques used today are either wet solution processing or dry thermal evaporation of the organic constituents. The field of organic solar cells profited well from the development of light-emitting diodes based on similar technologies, which have entered the market recently. We review here the current status of the field of organic solar cells and discuss different production technologies as well as study the important parameters to improve their performance.

https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0884291400094498

Organic solar cells: An overview

The electrochemical polymerization of 1,4-bis(2-methylstyryl)benzene and the electrochemical behavior of the resulting polymer-modified electrode have been studied The rapidly decreasing polymerization current of the 1,4-bis(2-methylstyryl)benzene can be attributed to the passivation effect of the resulting polymer coating The polymer-modified electrode showed an electrochemical response in an aqueous electrolyte solution corresponding to solute electroactive ions The electrochemical behavior was dependent on the polymerization charge and the size of the electroactive ions The polymer-modified electrode is applicable as the selective electrode for electroactive ions and molecules in an electrolyte solution containing electroactive bacterial cells

Electrochemical Characteristics of an Insulating Polymer-Modified Electrode Prepared by Electrochemical Polymerization

Conducting polymers with substituted long side chain such as poly(3-alkylthiophene), poly(3-alkyl-selenophene), poly(3alkylfuran), poly(9-alkylfluorene), and poly(9,9-dialkylfluorene) are shown to melt at relatively low temperature. Electrical conductivity and photoluminescence exhibit an anomalous dependence on molecular structures at the melting point. A marked polarity effect of photoconduction has been observed. These results are discussed in terms of unique band schemes of the conducting polymers in the premelting region and in the liquid state. >

Electrical and optical properties of liquid conducting polymer

Provided is a method for manufacturing a nanomaterial dopant composition composite that is simple and efficient, and with which it is possible to change the Seebeck coefficient value of a nanomaterial. This manufacturing method includes a contacting step for causing a dopant composition to come into contact with a nanomaterial within a solvent, the dopant composition containing an anion, a cation, and a scavenger.

Thermoelectric conversion element and thermoelectric conversion module

Dynamical properties of photo-induced spin disorder in doped manganites

Conventional dye laser solvents consist of organic solvents As the organic solvents have the problems of evaporation and inflammation, the dye laser apparatus has tended to have large volume and cause difficult handling For solving the problems, an ionic liquid is employed as a dye laser solvent Organic dyes can be stably dissolved in the ionic liquid, and substantially the same light emitting performance as in the use of organic solvents can be realized Further, as the ionic liquid is neither volatile nor inflammable, handling of the provided dye laser medium is very easy Still further, the characteristic that the exhibited photobleach is extremely low as compared with those of the conventional dye laser mediums using organic solvents as the solvents thereof is realized A laser sensor capable of detecting any given analyte with high sensitivity can be easily obtained by the use of the provided dye laser medium

Tsuyoshi Kawai

Papers

Electrochemical Characteristics of an Insulating Polymer-Modified Electrode Prepared by Electrochemical Polymerization

Electrical and optical properties of liquid conducting polymer

Thermoelectric conversion element and thermoelectric conversion module

Dynamical properties of photo-induced spin disorder in doped manganites

Dye laser medium, dye laser apparatus and laser sensor