Single‐ and multi‐quantum well (QW) structures of Ga(AsBi)/GaAs with up to 10% Bi were grown by molecular beam epitaxy (MBE) at 300–330°C substrate temperature. The photoluminesce measurements QW demonstrated room temperature emission wavelengths ∼1.43 μm. In the obtained using a combined growth approach – an active layer three QWs ∼6% was MBE, whereas (AlGa)As claddings metal organic vapour phase technique lasing 1060 nm documented.

Two-dimensional or other thin materials have high potential for use in next-generation electronic and optoelectronic devices. Recently, tellurium has gained much interest due to its broad applicability prospects. In this work, the physical properties of layers fabricated using two relatively simple inexpensive technologies based on deposition from a chemical solution by thermal evaporation were compared. The morphology grown surfaces was analyzed atomic force microscopy. chemically deposited...

We explore quantum well laser diodes based on two material systems, classical AlGaAs, and a rather exotic GaAsBi, with lasing at around 800 nm 1100 nm, respectively for applications in pulse oximetry. These spectral regions families were selected due to closely matched effective penetration depth into soft tissue. An improved design of the band structure device active areas was tested both yielding enhancement main parameters, output power threshold current. A maximum emission AlGaAs diode...

We explore quantum well laser diodes for applications in pulse oximetry based on two material systems, namely, classical AlGaAs and a rather exotic GaAsBi, with lasing at around 800 nm 1100 nm, respectively. These spectral regions families were selected due to their closely matched effective penetration depths into soft tissue. An improved design of the band structure device active areas was tested both yielding enhancement main parameters, output power threshold current. A maximum emission...

The melt of H3BO3 was used to reach a controllable reduced graphene oxide (rGO) synthesis protocol using (GO) precursor. Thermogravimetric analysis and differential scanning calorimetry (TG/DSC) investigation electron microscopy (SEM) images have shown that different from GO powder, reduction in the leads formation less disordered structure basal planes. Threefold coordinated boron atom acts as scavenger oxygen atoms during process reduction. Fourier-transform infrared (FTIR) spectra...

The propensity of peptides and proteins to form self-assembled structures has very promising applications in the development novel nanomaterials. Under certain conditions, amyloid protein α-synuclein forms well-ordered – fibrils, which have proven be valuable building blocks for bionanotechnological approaches. Herein we demonstrate functionalization fibrils formed by a mutant that contains an additional cysteine residue. been biotinylated via thiol groups subsequently joined with...

Annealing is well known technique to improve metal contacts. In order anneal metal/graphene contacts information of suitable time thermal treatment process required, otherwise in a long annealing undesired deformation graphene layer or electronic device can be induced. this article we introduce the investigation structure. Electrical properties contact between CVD grown and (Au Ni), using circular transmission line model (CTLM) geometry observed. Raman spectroscopy applied for...

Fabrication of practical devices based on the transient metal dichalcogenides (TMDs) can be successively extended to various areas applications if large area growth technology intentionally controlled and characteristics layers easily predicted. In present work we presented principles control single key variable that directly related sequence technological processes. The atomically thin MoS2 were used as a model material obtained by CVD synthesis molybdenum precursor. Our thorough study...

Equine lysozyme (EL) is a calcium (Ca)-binding and an intermediary link between non-Ca-binding C-type α-lactalbumin. The feature of lysozymes to assemble into the fibrils has recently gained considerable attention for investigation functional properties these proteins. To study structural EL, synthetic gene was cloned EL overexpressed in Escherichia coli as fused protein. His-tagged recombinant accumulated inclusion bodies. Up 50 mg/l could be achieved after purification by Ni2+ affinity...

Optical and magnetooptical properties of opal photonic crystals modified by Co nanoparticles have been investigated modulation spectroscopy technique in the visible spectral range from 400 to 800 nm.The 1 8 nm size were formed means chemical reduction reaction inside synthetic composed regularly close-packed SiO2 spheres diameter 250-300 nm.As it was estimated shift stop band crystals, occupied up several percent void volume crystal lattice.In Faraday configuration, external magnetic field...

Reduction of the optical reflectance to an absolute minimum by metal‐assisted chemical etching (MACE) is investigated for p‐type crystalline silicon (100) plane wafers. The amount Cu additive and composition solution identified proportion HF/(HF + H 2 O ) are main variable parameters controlling one step MACE. Pyramid like structures produced on surfaces. An influence variables surface topography related spectra studied measuring in interval wavelengths from 400 1400 nm. Presence a that...

Biofilm formation with eight different microscopic fungi on the polyaniline surface and its effect morphological, electrochemical redox properties have been studied. The investigations selected Chrysosporium merdarium Rhizomucor pusillus behavior were performed. Conspicuous difference in oxidation level, activity oxalate impurities at polymer layer treated was confirmed. of modified electrode characterized using cyclic voltammetry technique. chemical composition determined by X‐ray...

Crystallographic properties of AlAs barriers in GaAsBi-based multi-quantum well structures grown on GaAs substrates by molecular beam epitaxy (MBE) and migration-enhanced (MEE) were studied. The quantum wells at temperatures ranging from 160 to 350 °C. width GaAsBi varied 4 20 nm. optimization technological parameters for the growth high crystalline quality low was performed. To explore impact temperature treatment crystal quality, surface roughness chemical composition stability, ex situ...

Ultra-thin tin oxide films (of 1-40 nm thickness) for gas sensing were grown by dc-magnetron sputtering.Stoichiometric and stable SnO characterized unexpected dependence of the clean air resistance response to H2, NO2 gases on average thickness film.The significantly increased in extremely thin films.The rate sensor was independent thickness.The morphology chemical composition analysed scanning probe microscopy (SPM) X-ray photoelectron spectroscopy (XPS).The mechanism effect properties is...

Surfaces of constituent parts biosensors based on single wall carbon nanotube layer were investigated and compare for properly functioning faulty biosensors. Though the original technology is acceptable changing selectivity, only glucose sensitive are investigated. Based results study, a correlation between features nanoscale structures parameters amperiometric assemblage which an innovative approach described. Original template electrodes has been prepared base deposited supporting...

Macroporous silicon light trapping layers on the surface of p-type substrates were manufactured by using electrochemical etching. Optical measurements have shown decreased optical reflection as compared to bulk silicon. The p-n junction was formed phosphorus diffusion from phosphosilicate glasses. Scanning Kelvin Force Microscopy technique used determine location in samples with porous layers.DOI: http://dx.doi.org/10.5755/j01.ms.21.1.5725