Position-dependent performance of copper phthalocyanine based field-effect transistors by gold nanoparticles modification

Achieving Weak Light Response with Plasmonic Nanogold-Decorated Organic Phototransistors

Weak light response of organic photodetectors has fascinating potentials in fields of modern science and technology. However, their photoresponsivity is hindered by poor photocarrier excitation and transport. Decorating active-layer surface with plasmonic nanometals is considered a viable strategy to address this issue. Here, we demonstrate a plasmonic nanogold decorated organic phototransistor achieving remarkable enhancement of photoresponsivity. Meanwhile, the photoresponsive range is broadened by 4 orders of magnitude. The proposed design is substantiated by a schematic energy level model combined with theoretical simulation analysis, enabling the development of the advanced optoelectronics.

Extremophiles as sources of inorganic bio-nanoparticles

Industrial use of nanotechnology in daily life has produced an emphasis on the safe and efficient production of nanoparticles (NPs). Traditional chemical oxidation and reduction methods are seen as inefficient, environmentally unsound, and often dangerous to those exposed and involved in NP manufacturing. However, utilizing microorganisms for biosynthesis of NPs allows efficient green production of a range of inorganic NPs, while maintaining specific size, shape, stability, and dispersity. Microorganisms living under harsh environmental conditions, called "Extremophiles," are one group of microorganisms being utilized for this biosynthesis. Extremophiles' unique living conditions have endowed them with various processes that enable NP biosynthesis. This includes a range of extremophiles: thermophiles, acidophilus, halophiles, psychrophiles, anaerobes, and some others. Fungi, bacteria, yeasts, and archaea, i.e. Ureibacillus thermosphaericus, and Geobacillus stearothermophilus, among others, have been established for NP biosynthesis. This article highlights the extremophiles and methods found to be viable candidates for the production of varying types of NPs, as well as interpreting selective methods used by the organisms to synthesize NPs.