Thermal evaporation

Carrier-selective contacts play a crucial role in improving the performance of silicon solar cells by reducing recombination losses. This study explores the use of sub-stoichiometric molybdenum oxide (MoOx) as a holeselective contact material deposited via thermal evaporation.

8p visergeyne 18-06-2024 0 0   Download

In conventional partial resection of parenchymatous organs significant bleeding is one of the main problems, especially in neonates and infants. The patients rapidly lose considerable amounts of their small blood volume. Laser light leads to photo­ thermal effects in tissue and causes coagulation, drying up, carbonization and evaporization, depending on the temperature.

150p vimeyers 29-05-2024 4 2   Download

Ebook "Solving problems in food engineering" is a step by step workbook intended to enhance students' understanding of complicated concepts and to help them practice solving food engineering problems. The book covers problems in fluid flow, heat transfer, mass transfer, and the most common unit operations that have applications in food processing, such as thermal processing, cooling and freezing, evaporation, psychrometrics and drying. Included are theoretical questions in the form of true or false, solved problems, semi-solved problems, and problems solved using a computer.

297p manmanthanhla0201 27-02-2024 3 1   Download

Part 2 book "Handbook of food process design" includes content: Refrigeration, air conditioning and cold storage; chilling, freezing and thawing process design; thermal evaporator design 18 food processing and control by air jet impingement; heat pump design for food processing; freeze drying process design; crystallization process design,... and other contents.

538p oursky10 07-12-2023 6 4   Download

Protonated organic single crystals of Benzimidazolium salicylate (BSL) were successfully grown by the slow evaporation solution technique at room temperature. The crystal structure and lattice parameters of the as-grown single crystal have been identified and calculated by the powder X-ray diffraction (PXRD) method.

10p viberbers 09-08-2023 5 3   Download

In the study, SnO2/ZnO core/shell nanowires were synthesized through the two-step processes. First, SnO2- core nanowires were synthesized from Sn powder source at 750 oC by a chemical vapor deposition method (CVD). The ZnO shell was then deposited on SnO2 nanowires by a DC sputtering method.

7p visybill 19-07-2023 11 3   Download

In this study, ZnO/MoS2 heterostructure nanowires have been successfully grown on Si/Au substrates by a one-step co-evaporation method. The crystalline phase, surface morphology, and optical properties have been investigated by means of X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), Raman, PL, and PLE spectroscopies.

11p vispiderman 15-06-2023 5 2   Download

The networked ZnO nanowires (NWs) are synthesized by thermal evaporation at 900 ˚C, using a mixture of ZnO and graphite. The morphology, crystalline structure, and chemical composition of the NWs are evaluated by field-emission scanning electron microscopy, X-ray diffraction, and energy-dispersive spectrum.

12p vispiderman 15-06-2023 5 3   Download

In this paper, cantilever beams are designed and fabricated on silicon wafers. L-Edit software is used to design two masks for light exposure step. Fabrication process including photolithography, copper thermal evaporation, and etching is done to achieve the designed cantilever beams.

8p vifred 23-12-2022 17 3   Download

In this work, ZnO nanocrystalline thin films were obtained by evaporating Zn using the thermal evaporation technique and then thermal treatment. The results show that after annealed at temperature of 400°C, the porous structure becomes visible and the ZnO film has a particle-like structure.

9p vijichoo2711 04-06-2021 10 1   Download

Heterojunctions of metal oxides and single-walled carbon nanotubes (SWCNTs) have attracted great attention because of their unique physical properties and giant potential applications. In this study, we report the fabrication of NO2 gas sensors using heterojunctions made of SnO2 nanowires and SWCNTs. The single crystal SnO2 nanowires were grown on Pt electrodes via thermal evaporation. A thin film of SWCNTs was synthesized directly on top of the SnO2 nanowires to form the SnO2/SWCNTs heterojunctions by arc- discharge method.

4p cothumenhmong11 10-05-2021 9 1   Download

The limitation of land in urban area leads to the existence of land slowly omitted and changed to be functioned room. The additional room itself will be reducing thermal comfort in the house.

13p lucastanguyen 01-06-2020 10 2   Download

This study aims to evaluate the reduction of evaporation of Lake Nasser’s water caused by disconnecting (fully or partially) some of its secondary channels (khors). This evaluation integrates remote sensing, Geographic Information System (GIS) techniques, aerodynamic principles, and Landsat7 ETM+ images.

8p kethamoi1 20-11-2019 13 0   Download

The potential use of many common hydrofluorocarbons and hydrocarbons as well as new hydrofluoroolefins, i.e. R1234yf and R1234ze(E) working fluids for a combined organic Rankine cycle and vapor compression refrigeration (ORC-VCR) system activated by low-grade thermal energy is evaluated. The basic ORC operates between 80 and 40 C typical for low-grade thermal energy power plants while the basic VCR cycle operates between 5 and 40 C.

10p kequaidan1 16-11-2019 12 0   Download

By doping of Cu2+ ion, the absorption wavelength is shifted towards the lower wavelength being an evidence for an increasing band gap. The emission spectrum of pure ZnS has a green emission band centred at around 520 nm. By doping Cu2+ ion, the peak of the green band in the luminescence spectra were transferred to 516 nm and appeared a strong blue peak at 440 nm. The reasons of these will be discussed in this paper.

7p cathydoll4 21-02-2019 22 1   Download

The last stage is the continuous decomposition of lignin at higher temperature up to 580 oC. For cellulose, the thermal degradation in air atmosphere has decomposition temperature higher than that in the nitrogen atmosphere but the ending temperature is lower. On the other hand, the thermal decomposition of lignin just occurred from 150 to 560 oC. The reaction for acacia wood demonstrated three stages. The water evaporated at lower than 120 oC in the first stage. The second stage is the devolatilization of biomass (214-322 oC) and the third one (322-420 oC) is the combustion of char.

7p giesumanh 10-11-2018 27 1   Download

In this work, TiO2 nanocrystalline thin films were obtained through evaporating Ti films by Electron Beam Deposition (EBD) followed by thermal treatment. The deposition speed of Ti thin fims was carried out at 0.15 nm/s and 1 nm/s. The results show that after annealing at 450˚C for 8 h, the obtained TiO2 thin films have nanoparticle structure with grain size of 20 nm for the Ti thin film deposited at the rate of 1nm/s, whereas at the a deposition rate of 0.15 nm/s, the TiO2 has a nanorod structure with the rod length of 300 – 400 nm.

8p thuyliebe 09-10-2018 48 3   Download

The study of electrochromic thin films, which are transparent in the visible range, is significantly important in producing smart doors production and saving energy. This paper reports the results of preparing WO3 thin films on glass substrates and ITO substrates by thermal vacuum evaporation method.

8p cumeo3000 01-08-2018 45 1   Download

Silicon nanowires (Si NWs) were fabricated on Si(111) surfaces by both thermal evaporation and sputtering methods. Au nanocrystals were used as the metal catalysts and they were fabricated by electron beam evaporation. The field emission scanning electron microscopy (FESEM) was used to characterize the Si NWs. The diameters of the Si NWs were measured to be about few tens of nanometer. The mechanism of the nanowires formation by these methods was also discussed.

5p cumeo3000 01-08-2018 35 1   Download

The results showed that the obtained ZnO NWs have diameters in the range of 300–350 nm with lengths of several tens micrometers. The prepared ZnO NWs are of a single crystal, which have a hexagonal wurtzite crystal structure with c–axis (002) orientation growth perpendicular to the substrate surface. The NW arrays had a good crystal quality with excellent optical properties, indicating a sharp and strong ultraviolet emission at 380 nm, and a weak visible emission at around 516 nm.

11p cumeo3000 01-08-2018 23 0   Download