Electronic Properties Of Monolayer Tungsten Disulfide

Whenever a monolayer is attached to a metal surface, the wetting properties and behavior can be significantly affected (Yuan & Lee, 15). In practice, densely-packed self-assembled monolayers (SAMs) can be used to modify the macroscopic properties of a solid surface (Dilimon et al. 202). Changes in wetting properties occur due to changes in the angle made by a liquid droplet whenever it is in contact with the surface. This phenomenon is significant in several contexts for example, in industrial contexts: this property is used to evaluate the cleanliness of semiconductor wafers. In such contexts, contact angles measurements are widely used. Control of this property is also useful during penetration of insecticides or pesticides into plants, and waterproofing of materials (Yuan & Lee, 25). While the former focuses on maximization of wetting, the latter case seeks to minimize liquid-induced wetting (Yuan & Lee, 28).

Semiconductor Nano crystals or quantum dots are materials that are typically 2-20 nm in diameter, consisting of approximately twelve to fourteen thousand atoms. The effect of quantum confinement results, in the electrons and holes in the Nano crystal to exhibit quantized energy states; thus enabling them to exhibit novel physical properties that are not found in their bulk counterparts. Research in semiconductor quantum dots started with the realization that the optical and electronic properties of these particles were strongly dependent on particle size, due to quantum confinement of the charge carriers in small spaces.

The use of nano-materials and extreme precision micro-engineering has the potential for great improvement in the world of electronics and information technology by providing smaller, faster, and more powerful computers and this has been at the forefront of the nanotechnology commercialization . Great examples of how nanotechnology is currently being used in these fields are products such as processors, data storage, and memory components made with nano-materials, TVs, monitors and even smartphone screens that use organic light-emitting diodes (OLED), and waterproof electronics such as smartphones due to the application of nano-coatings

The following picture shows the CVD growth for WS2. The yield is not very High like MoS2, it is only on the center sample and triangle size up to 80um. To improve the growth, we need to reduce the sulfur flux, and increase the Tungsten trioxide (WO3) flux by changing temperature or quantities. Also, we should increase the growth time.

The higher the gap band energy, the lower the conductivity. The energy (Eg) of cadmium sulfide calculated was 3.92×10-19J which corresponds to 2.45 eV.

Goal: Synthesize Cadmium Selenide (CdSe) Quantum Dot Crystals using Cadmium Oxide (CdO) and Selenium (Se) dissolved in Triphenylphosphine solution. The product created will be a colloidal solution, bound to the exterior of the crystal lattice and it remains soluble in the octadecene (Boatman & Nordell). Along with this the product will most likely vary in color as well due to the changes in wavelength, energy and transitions, that all correspond to a smaller crystal. The variations in particle size will prove to be an important feature in the experiment, so the goal is to use diverse size particles. The crystals are created in a solution in which they cannot be filtered out since they do not settle.

Tungsten, also known as wolfram, is a chemical element with symbol W and atomic number 74. The word tungsten comes from the Swedish language tung sten, which directly translates to heavy stone. Its name in Swedish is volfram, however, in order to distinguish it from scheelite, which in Swedish is alternatively named tungsten.

Pauli exlusion principle: no two electrons in an atom can have the same four quantum numbers; no two electrons in the same atomic orbital can have the same spin

Tungsten is solid at room temperature which is why I used compact which means dense.

Ultra Chem SFV cannabis strain can be grown indoor and outdoor. Flowering time is 8 weeks. It will grow buds that are compact and dense and the average yield it gives will be compensated by buds with strong THC content. The buds will emit a skunky and fuely scent and the taste will have hint of the same with sour undertones

Compared to TiO2, Figure 26a and 26b, which represent the XRD for titania film, it is observed that the crystallinity increases with temperature, which is the same behavior as with zinc oxide films. Furthermore, there is great difference between the samples with SiO2 layer and those without barrier layer. In the samples without barrier layer, sodium diffusion inhibit crystals growing in the film [7].

Capacitance-voltage (C-V) characterization is a non-destructive technique which determines the charge distribution and identifies the presence of interface states in semiconductors when the applied biasing voltage participates in the carrier capture and emission at interface traps [14,15]. Such traps are charged leading to the production of a dipole layer at the interface. Small modulation in the AC bias will change the barrier height, and the position of the Fermi level will shift relative to its equilibrium position. Thus, the characteristics of the device will be changed [15,16].

Tungsten is widely used in military to fabricate armor piercing ammunition and used to infiltrate substantial solidified heavily clad targets, for example, defensively covered vehicles, solid shelters, tanks and different guards. Contingent upon the gauge of the guns. It is ammo comprises of a penetrator developed of tungsten amalgam or tungsten carbide, or exhausted uranium, encased inside of a milder coat, for example, copper or aluminum. The item ammo can extend from rifle-and gun gauge gathers the distance together to tank rounds.

The band theory gives explanations of how Semiconductors differ from metals because as the temperature increases the conductivity increases. The Band Theory considers that for

We have now discussed the two extremes in electronic materials; a conductor, and an insulator we will now move to a material that lies in between these two, a semiconductor. The