Abstract Biomethanation is a prospective biogas upgrading method to integrate renewable energy grid with existing grid. Biomethane can directly substitute fossil natural gas and be used in all sectors. The selection of packing material for the ex-situ biomethanation biotrickling filter reactors based on physical chemical characterization carrier material. selected supports hydrogenotrophic meth...

Femtosecond laser-induced backward transfer of transparent photopolymers is demonstrated in the solid state, assisted by a digital micromirror spatial light modulator for producing shaped deposits. Through use of an absorbing silicon carrier substrate, we have been able to successfully transfer solid-phase material, with lateral dimensions as small as ~6 μm. In addition, a carrier of silicon in...

We determine the mobility of positive and negative charge carriers in a soluble green-emitting alternating block copolymer with a methoxy bi-substituted conjugated segment. The negative charge carrier mobility of 6 10 11 cm/V.s is directly determined using space-charge-limited current analytical expressions. Positive charge carrier transport is also space-charge-limited, with a mobility of 1 10...

We report the experimental implementation of a wireless transmission system with a 146-GHz carrier frequency which is generated by optical heterodyning the two modes from a monolithically integrated quantum dash dual-DFB source. The monolithic structure of the device and the inherent low noise characteristics of quantum dash gain material allow us to demonstrate the transmission of a 1 Gbps ON-...

We present a review of our latest work on UniTravelling Carrier Photodiodes for high efficiency THz emission. The detectors’ waveguide structure allows for both higher responsivity and saturation power thus achieving the highest published THz figure of merit (PTHz/Popt ) up to 1.5 THz for such devices. We also discuss new material development using solid source MBE and the possibility of monoli...

1. Introduction Two pioneering papers on the 2D (two-dimensional) carbon-based material graphene published in 2004 [1-2] ignited an enormous attention to this material and it did not take long before the electron device community showed interest in graphene [3-5]. Mainly graphene's excellent carrier transport properties have attracted device engineers and led to the expectation that graphene co...

Triple Material (TM) Double Gate (DG) Metal Oxide Semiconductor Field Effect Transistor (MOSFET) with high-k dielectric material as Gate Stack (GS) is presented in this paper. A lightly doped channel has been taken to enhance the device performance and reduce short channel effects (SCEs) such as drain induced barrier lowering (DIBL), sub threshold slope (SS), hot carrier effects (HCEs), channel...

A first principles analysis, of two multiple-level-defect systems, yields differential rate equations from which a multiple-defect-level solution, derived without approximation, is applied to the experimental analysis of level depth. In terms of semiconductor material characterization, this exact solution including the full set of carrier transitions is shown to provide more detailed informatio...

Organometal halide perovskites are under intense study for use in optoelectronics. Methylammonium and formamidinium lead iodide show impressive performance as photovoltaic materials; a premise that has spurred investigations into light-emitting devices and photodetectors. Herein, the optical and electrical material properties of organometal halide perovskites are reviewed. An overview is given ...