Scanning electron microscope

According to R.A Aitken, “An asymmetric synthesis may be defined as a synthesis in which an achiral unit is an ensemble of substrate molecules is converted to a chiral unit such that the possible stereoisomers are formed in unequal amounts.” It relates to any synthetic process that incorporates one or more new elements of chirality during a functional group transformation. Asymmetric synthesis involves the formation of chiral molecules. An object is said to be chiral, if it cannot be…

Electron microscope (Manning, n.d.) is the instrument used to magnify different scientific artifacts with the used of electron beams to create the illustration of the sample, and has the capacity to magnify two million times of the original specimen. The development of the electron microscope was first known in the year 1931 because Ernst Ruska and Maximoll Knoll magnified electron image successfully, but the equipment was actually constructed in 1933 (Innes, n.d.). The concept of the electron…

Resistivity (ρ) than the iron wire, and/or the two copper wires connected together. Resistivity is defined as how strongly a particular material resists current, and is measured in Ohm-meters (Ω-m). Electrical resistance (R) is the opposite of the flow of electrons, or the passage of an electrical current. Electrical conductivity (σ) is the opposite of resistivity and is measured in Siemens (S). Electrical conductivity is defined as; the degree to which a specified material conducts…

particles made up of electrons, protons and neutrons.…

the most promising TiO2 based materials for photocatalytic applications, which is able to harvest a significant amount of solar light. It has not only influences the optical properties, photoreactivity, charge recombination rates, and interfacial electron transfer rates, but also improves the physical properties of TiO2 such as the size of the…

In the chapter “Democritus, Sophie is asked “Why is Lego the most ingenious toy in the world?”(Gaarder 44). This question then leads to the philosopher, Democritus, who is known for the atom theory. Alike the structure of legos, he believed all atoms that made up the universe were “eternal, immutable, and indivisible”(Gaarder 45). Furthermore, Democritus believed all atoms were firm and solid and were all different. Since they were all different, he thought they could join together and form all…

When electric field is applied, it causes the electron cloud to distort in one direction while the nucleus moves in the other direction. Since the center of electron cloud no longer coincides with the nucleus, a dipole moment develops. Ionic polarisation To undergo ionic polarisation, a material must have an ionic structure i.e. it must be composed of…

of light into electricity at the atomic level as explained in How do Photovoltaics Work. The way that photovoltaics work is through the property known as the ‘photoelectric effect’ that causes some materials to absorb photons of light and release electrons that are captured, forming an electric current. “The photoelectric effect was first noted by a French physicist, Edmund Bequerel, in 1839” he found that specific materials would produce electric currents when in exposure to light, such as the…

Science Fair 2018- Rock and Roll Bounce Observation What is friction? What is the difference between motion and forces? Are there different types of motions and forces? What is gravity? What is Newtons law? Does friction have to do with motion or force? Does Newton's law apply to everything that is moving? How is movement and forces apply to the world itself? Do natural disasters involve motion and forces? Does energy have to do with motion and forces? How many types of…

Jacob Schuster Comparing and Contrasting Michael Faraday and Hans Christian Orsted Michael Faraday and Hans Christian Oersted were both Chemists and Physicists in the 1800’s. They both discovered the connection between magnetism and electricity. This paper will give backgrounds on both Faraday and Oersted and will compare and contrast their works. Michael Faraday was born in London on September 22, 1791. He was the first person to produce an electric current from a magnetic…