Raman spectroscopy

Both IR and UV spectroscopy are methods of measuring the wavelengths absorbed by a tested material. IR spectroscopy measures the absorbance of the tested material in the infrared spectrum, the section of the electromagnetic spectrum with a lower frequency than that observed in the visible light spectrum. Conversely, UV spectroscopy measures the absorbance of the tested material in the ultraviolet spectrum, the section of the electromagnetic spectrum with a higher frequency than that observed in…

Joseph von Fraunhofer was a German optician and physicist who discovered and influenced how astronomers view the dark line spectrum, the spectrum of the sun and the diffraction of light. His discoveries turned him as a glassmaker with humble beginnings into a scientists whose discoveries would allow scientists after him to calculate the distances of stars and lead them to recognize that the universe is expanding. On March 6, 1787 in Straubing, Bavaria, Joseph Ritter von Fraunhofer was born into…

To begin the experiment, the Spec 20 was turned on to warm up for 15 minutes and set to maximum absorbance wavelength. Ten test tubes were then prepared. The Spec 20 was set to 0% and a test tube of blank solution (water) was wiped off and placed into the Spec 20. Transmittance was then set to 100% to calibrate the machine. Next, five test tubes were prepared and labeled with one of the standard solutions of 0.05 M, 0.1 M, 0.2 M, and 0.5 M CuSO4 in them. The Spec 20 was set to 600 nm and %…

Introduction: The goal of this lab was for students to learn how to use a spectrophotometer to find the absorbance of four known copper (II) sulfate solutions, four copper (II) sulfate solutions that were created by dilution, and one unknown copper (II) sulfate solution. The purpose of this experiment was to help students learn how to use the Spec-20, learn about the relationship between absorbance and concentration known as the Beer- Lambert law and see the relationship between moles, volume…

A spectroscope takes in light and breaks it into their own individual wavelengths, which are the colored lines we see. The light was produced by electrons, which each have their own quantum, or energy level. When we run a current through the atom, the electron gains energy and jumps to a higher level to its excited state. When they fall back to their ground state, they release their stored energy through the form of light. The line spectra for different atoms differ because they each have a…

technique of spectroscopy; spectroscopy can be defined as the science affiliated with the spectra produced when matter interacts with light. Lab 7 investigation 19, “What Factors Affect the Intensity of Color?” expands on the process of spectroscopy, and its relation to the molarity of a substance. The goal of this lab was to determine the effects of the intensity of color of a solution (2). Spectroscopy is frequently used in the medical field by using the process of infrared spectroscopy, which…

cinnamate, cinnamic acid, and glucose, which are ingredients in the candy, Red Hots. The experiment began with 0.604 grams of a mixture of ethyl cinnamate, cinnamic acid, and glucose. The purity of glucose and ethyl cinnamate was measured through IR Spectroscopy. Melting point was used to determine the purity for cinnamic acid. Using the final amount for each ingredient, we determined the percent yields, which were 64.7% for glucose, 56.2% for cinnamic acid, and 38.8% for ethyl cinnamate. The…

3. Objective In this project, a coordination compound, [Co(II)EDTA]2− will be prepared and its magnetic moment will be determined by NMR spectroscopy. A full picture of the clock behaviour will be presented through the combination of measurements provided by NMR spectroscopy alongside those obtained using more orthodox techniques such as UV spectrometry and pH measurements. The experiment in Dr. Evans paper will replicated using the same measurements and techniques. This project is to serve as a…

3.4. Friction Characteristics of the NCD, MCD and boron doped NCD Coatings against Alumina Balls The friction coefficient curves of NCD, MCD and boron-doped diamond films sliding with Al2O3 balls are shown in figure 4, figure 5 and figure 6, respectively, for a sliding speed of 8 m/s and a load of 1N, 5N and 10N, respectively. Figure 4 (a), figure 5 (a) and figure 6 (a) show the friction coefficient of NCD, MCD and BDNCD at 1 N, respectively. Figure 4 (b), figure 5 (b) and figure 6 (b) show…

Introduction Quantum dots (Q-Dots) is very small semiconductor particles that means it can be either conductors or resist electricity depending on the temperature and purity of the semiconductor. Q-dots range in size from 2-10 nm, so because of their small size, quantum mechanics governs the physics of the particles. The synthesis Q-Dots were first studied in 1982 by Efros and Ekimov, and then many developments have reported the synthesis of semiconductor nanoparticles.1 Q-Dots have unique…