Disadvantages Of Porous Silicon

All the data was fitted satisfactorily using the equivalent circuit shown in Fig. 7. Where, Rs, CPE1 and R1 represent solution resistance, a constant- phase element corresponding to the double layer capacitance and the charge transfer resistance, respectively. CPE2 and R2 were added to account for the electrical elements of the outer layer. The following formula expressed the electrode impedance, Z, as follow:

Animal and plant cells are often referred to as eukaryotic cells, eukaryotic cells are cells that contain a true nucleus as well as other organelles. A light microscope can be used in order to view the nucleus and cell membrane superficially; however, in order to view other organelles an electron microscope is required, this is because light microscopes are unable to resolve parts of a specimen that are smaller than 0.2µm.

In modern times, there are numerous materials used to make the everyday necessities we need in life such as our phones, clothes, shoes, plastic bags, and many more. However we could narrow the materials down to metal-based products, polymer-based products/ plastics, and cellulose-based products/paper. To narrow things even down further so that we could have an argument, plastic and cellulose could both be used to make the same type of material such as containers for juice, containers for food, chairs, tables and many more. With this, we could now compare if plastic or paper is the better material to make our basic necessities. I would say that plastic would be better because of its durability, energy efficiency in making plastics, and the ability to mold plastic.

Hydraulic fracturing, also known as “fracking” is a reservoir stimulation technique. In other words, it can be defined as a process of deeply drilling down into the Earth and injecting high-pressurized water mixture, which contains water, sand and other chemicals into the ground. After having been pumped into the ground, the fracking fluid creates cracks in deep-rock formations, allowing oil and gas to flow out of the well. The phrase “gas shale” refers to natural gas that is extracted from deep hard rock formations by using fracking. The shale gas production nowadays involves six steps: seismic exploration, pad construction, vertical and horizontal drilling, hydraulic fracturing, sustained production and waste disposal. It is obvious that

While I respect your views, I personally disagree with using fracking. Though fracking has a ton of support for its positive externalities such as increasing jobs, being a cheaper energy source, and decreasing the U.S.'s dependence on foreign oil, there is great concern regarding fracking's negative externalities; for instance, fracking does a lot of potential environmental damage. I think the biggest issues with fracking that we should focus on are: water contamination, how fracking drives potential investment toward clean energy away, and the lenient legislation and penalties currently put on fracking does not suffice in terms of lessening potential safety risks.

Breast implants are medical devices that are implanted under the breast tissue or under the chest muscle to increase breast size or to rebuild breast tissue after mastectomy or other damage to the breast.

The matter of the fact is that, advancing plumbing technology is making joining pipe much easier and time efficient in comparison to the older ways of joining water piping. These new ways of joining pipe and the new piping materials that are being developed only make a plumber’s job easier. Innovations such as the Viega ProPress and MegaPress allow plumbers to join copper and gas pipes faster than ever before. These machines allow the plumber to join pipe in less than thirty seconds. Whereas in the past, a plumber would have to solder copper together and thread gas pipe, which both take up a bit of time on the jobsite. Saving time is essential, as doing so ensures a lower bill for the customer, which in turn will make them happy giving the plumber a good reputation. Saving time allows for plumbers to move quickly from job to job. With this a plumber has a higher of potential of earning more money, thanks to these new tools, they can now complete their task at a much higher rate. Advancing plumbing technology also helps plumbers save money on labor costs and materials. Since Pex and CPVC are plastic, they are cheaper than other older materials. Pex and CPVC are also more lightweight and easier to join when compared to older pipes. This in the end will save money on labor and material costs. These costs are always present in the invoice at the end of a job, which is all charged to the customer. If a plumber does a really expensive job, for a small repair, his reputation won’t

Natural gas is a nonrenewable source of energy that is formed of the fossils of prehistoric organisms. It is one of the three fossil fuels found on Earth, which includes oil and coal and is cleanest of the fossil fuels and provides about fifty-eight percent of the world’s energy (although it is not the cleanest form of energy on the planet). It emits less carbon than oil and coal and can be an answer to climate change, but, like most things, there are some drawbacks. Fracking is a serious issue that not only causes environmental problems, but also health complications in many people. The benefits of natural gas far outweigh the disadvantages that it presents, although the disadvantages are severe.

During the presentations there was to presentations that really opened my eyes to the issues we have today in our society. These two presentations were on models in the United States versus other countries and there other presentation was on homeschooling. The modeling one stuck out to me because I have always struggled with being under weight. The magical number that countries had imposed was that all models had to have a BMI of no less than 18%. Since we are surrounded by these images all over the place countries are taking initiative to ban ultrathin models. They set unrealistic expectations that people want to be like them. Since the BMI was so important I thought I would do some research after class and I found out that I have a BMI of

The purpose of this experiment was to test in what ways voltage is affected within a cell with them being temperature, concentration, type of metal used, and type of circuit. The Data obtained by combining two metal solutions together connected with a salt bridge and measured with a voltmeter show that increasing temperature decreases voltage as well as increasing the Q value. Series circuits were found to increase the voltage of a cell as long as it was the same type of cell being used already within the cell combination. In the process, parallel circuits were found to not affect voltage and only affect current.

c) How the Band Theory predicts that the conductivity of silicon increases as the temperature increases.

Over the past several years the realization of a limited amount of renewable resources has pushed for a more environmentally friendly form of utilities. This realization has shifted the mindset of the consumer to prefer a more green and economical utility free home using sustainable energy sources. The scientists at Whole Life Energy are analyzing the use of geothermal energy to meet the requirements of our consumers and environment. This report covers what geothermal energy is, different types of geothermal energy, and geothermal energy advantages.

With the funds received from Kickstarter, Consumer Physics was given the chance to further develop SCiO and venture into the market. This report explores the benefits and highlights of SCiO. The product’s name SCiO suggests ‘to know’ in Latin. This means that with the molecular scanner, SCiO, people are able to obtain the relevant information of the item which they are interested in almost instantly. SCiO first reads the item’s molecular structure, matches the information in the database and then sends the information to the mobile application. In short, it is able to determine the various physical composition of the material and expand our knowledge of our everyday objects at the same time.

In this study, we report reports an approach to form an exceptionally high-power lithium-ion capacitor (LIC) using environmentally friendly lithiated silicone oxycarbide (SiOC) material derived from phenyl-rich silicone oil as the anode and activated carbon via KOH activation of snake fruit rinds (SKOH) as the cathode. A battery-type SiOC anode exhibited an incredibly high rate capability in which one third of its initial capacity was maintained even after the discharge current density increased up to 1,600 fold (from 0.05 to 80 A g-1). Moreover, the SKOH cathode demonstrated a massive surface area of 2,638 m2 g-1 promoting a remarkably high capacitance. When coupled to lihtium metal in a cell, the maximum power density of SKOH in LIC was 7.4 × 106 W kg-1 at a current density of 103 W h kg-1 (a loading mass of c.a. 4 mg cm-2). The optimized lithiated SiOC anode and SKOH cathode were paired in an LIC cell, providing a maximum power density of 156,000 W h kg-1 at an energy density of 25 W h kg-1. Moreover, the LIC demonstrates an outstanding cycle retention of 93% after 78,000 cycles.

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