High-Throughput Nanoparticle Chemisorption Printing of Chemical Sensors with High-Wiring-Density Electrodes

We report on the high-throughput non-lithographic microprinting of a high-wiring-density interdigitated array electrode (line and space = 5 µm/5 µm), based on a facile wet/dewet patterning of silver nanoparticle ink. The trade-off between high-density wiring and pattern collapse in the wet/dewet patterning is overcome by employing a new herringbone design of interdigitated array electrode. We demonstrate electrochemical sensing of p-benzoquinone by the fabricated interdigitated array electrode, showing a typical steady-state I–V characteristics with superior signal amplification benefiting from the redox cycling effect. Our findings provide a new technical solution for the scalable manufacture of advanced chemical sensors, with an economy of scale that cannot be realized by other techniques

Fundamenta Botanica Tom. VII

Here, we investigated photocarrier generation and diffusion characteristics in molecular-scale donor–acceptor charge-transfer (CT) systems. The photocarrier diffusion characteristics were measured on a series of mixed-stack CT compound crystals by the laser beam-induced current (LBIC) technique where the photocurrent is detected on the crystal surfaces as a function of either the laser illuminated position or the laser-modulation frequency. In the compounds with CT gap energy larger than 0.7 eV, the diffusion length of photocarriers reached larger than 10 μm. The dependence of diffusion length on the electric field and the laser-modulated frequency clearly indicates the direct generation of long-lived photocarriers without forming exciton. In contrast, the photocarrier diffusion was suppressed, and the diffusion length got smaller than 2 μm in the compounds with a gap energy smaller than 0.7 eV. We discuss that the electron–hole recombination becomes dominated when the CT gap energy is as small as the molecular reorganization energy. The results suggest that proper choice of donor–acceptor combination should promote efficient charge separation in organic photovoltaic cells (OPCs)

Effects of Substituted Alkyl Chain Length on Solution-Processable Layered Organic Semiconductor Crystals

Effects of Substituted Alkyl Chain Length on Solution-Processable Layered Organic Semiconductor Crystal

Effects of Substituted Alkyl Chain Length on Solution-Processable Layered Organic Semiconductor Crystals

Effects of Substituted Alkyl Chain Length on Solution-Processable Layered Organic Semiconductor Crystal

Effects of Substituted Alkyl Chain Length on Solution-Processable Layered Organic Semiconductor Crystals

Effects of Substituted Alkyl Chain Length on Solution-Processable Layered Organic Semiconductor Crystal