Conducting polymers represent an important class of functional organic materials for next-generation electronic and optical devices. Advances in nanotechnology allow for the fabrication of various conducting polymer nanomaterials through synthesis methods such as solid-phase template synthesis, molecular template synthesis, and template-free synthesis. Nanostructured conducting polymers featuri...

We have measured the optical conductivity s1ðoÞ of the filled skutterudites CeFe4Sb12; CeRu4Sb12; and CeOs4Sb12: These s1ðoÞ spectra are explained in terms of the hybridization between Ce 4f states and conduction ðcÞ electron states. From the comparison of the s1ðoÞ spectra, it is concluded that the degree of c–f hybridization is strongest for CeFe4Sb12 and weakest for CeOs4Sb12: r 2003 Elsevie...

Morenosite (NiSO4.7H2O) is a hydrogen bonded crystal having a wide range of applications in various fields. In an attempt to understand the effect of glycine as an impurity on the properties of morenosite crystals, we have grown by the free evaporation method at room temperature and characterized pure and glycine added morenosite single crystals. The grown crystals were characterized structural...

Monte Carlo–maximum entropy calculations of the conductivity of the infinite-dimensional periodic Anderson model are presented. We show that the optical conductivity displays anomalies associated with the exhaustion of conduction-band states near the Fermi energy including a Drude weight, which rises with temperature, with weight transferred from a temperature and doping-dependent mid-infrared ...

Differentiation and conduction properties of the cardiomyocytes are critically dependent on physical conditioning both in vitro and in vivo. Historically, various techniques were introduced to study dynamic events such as electrical currents and changes in ionic concentrations in live cells, multicellular preparations, or entire hearts. Here we review this technological progress demonstrating h...

We investigate the excitonic transitions in singleand few-layer MoSe2 phototransistors by photocurrent spectroscopy. The measured spectral profiles show a well-defined peak at the optically active (bright) A0 exciton resonance. More interestingly, when a gate voltage is applied to the MoSe2 to bring its Fermi level near the bottom of the conduction band, another prominent peak emerges at an ene...

Bepridil is effective for conversion of atrial fibrillation to sinus rhythm and in the treatment of drug-refractory ventricular tachyarrhythmias. We investigated the effects of bepridil on electrophysiological properties and spiral-wave (SW) reentry in a 2-dimensional ventricular muscle layer of isolated rabbit hearts by optical mapping. Ventricular tachycardia (VT) induced in the presence of b...

BACKGROUND Voltage-sensitive dyes are important tools for mapping electrical activity in the heart. However, little is known about the effects of voltage-sensitive dyes on cardiac electrophysiology. OBJECTIVE To test the hypothesis that the voltage-sensitive dye di-4-ANEPPS modulates cardiac impulse propagation. METHODS Electrical and optical mapping experiments were performed in isolated L...

We report a surface-normal optically controlled optoelectronic modulator made from a reversed biased p-i ~multiple quantum well!-n GaAs/AlGaAs structure with ultrathin barriers ~5 Å! whose recovery time is based on diffusive conduction. Modulation of reflectivity from 0.3 to 0.6 and back again in about 50 ps was demonstrated using a 750 fJ control pulse at 855 nm. We also demonstrated modulated...