+ Laser MicroRaman Study of Reduced Synthesized Spinel Powders Brittany A. Morgan (Seattle University), Alexandra J. Léandre (Bennett College), Michael.

Slides:

Advertisements

Similar presentations

Molecular Bonds Molecular Spectra Molecules and Solids CHAPTER 10 Molecules and Solids Johannes Diderik van der Waals (1837 – 1923) “You little molecule!”

Advertisements

Raman Spectroscopy A) Introduction IR Raman

Investigation of the Catalytic Activity of Plasma-Treated Fe, Ni, and Co Foil for Water Splitting Nick Lavrov, Olivia Watson.

Advanced Nano-technology and Applied Optoelectronics Lab. Southern Taiwan University of Science Technology Raman Effect And Micro-raman Spectroscopy 拉曼效應與微拉曼光譜儀.

2012 Transfer-to-Excellence Research Experiences for Undergraduates Program (TTE REU) Characterization of layered gallium telluride (GaTe) Omotayo O Olukoya.

Raman Spectroscopy Laser 4880 Å. Raman Spectroscopy.

Most lasers are made of some material such as a crystal of ruby or a gas that is enclosed in a glass tube, like argon. Suppose an atom was in an excited.

Molecular Fluorescence Spectroscopy

427 PHC.  Atomic emission spectroscopy (AES) is based upon emission of electromagnetic radiation by atoms.

Crystal Structural Behavior of CoCu₂O₃ at High Temperatures April Jeffries*, Ravhi Kumar, and Andrew Cornelius *Department of Physics, State University.

The Double Pervoskite NaTbMnWO 6 : A Likely Multiferroic Material † Alison Pawlicki, ‡ A. S. Sefat, ‡ David Mandrus † Florida State University, ‡ Oak Ridge.

Raman Spectroscopy Raman effect is a 2-photon scattering process

The Embedded Ring Approach Applied to Annealed Graphitic Amorphous Carbon Sterling Smith, and J.R. Dennison Department of Physics, Utah State University,

Raman Spectroscopy Laser 4880 Å. Raman Spectroscopy.

Introduction to Infrared Spectroscopy

Raman Spectroscopy: Introductory Tutorial

X-Ray Diffraction Spectroscopy RAMAN Microwave. What is X-Ray Diffraction?

Biochemical instrumental analysis-2

Spectroscopy Microwave (Rotational) Infrared (Vibrational)

Chapter 4 Spectroscopy Chapter 4 opener. Spectroscopy is a powerful observational technique enabling scientists to infer the nature of matter by the way.

Atomic Emission Spectroscopy

Raman Spectroscopy Komal Choudhary Lecturer School of Biotechnology

High pressure infrared studies of HMX Jennifer Wojno 1, Michael Pravica 2, Martin Galley 2 1. Department of Physics & Astronomy, 102 Natural Science Building,

Infrared Spectroscopy

Assoc. Prof. Dr. Ayşen YILMAZ Department of Chemistry Middle East Technical University Ankara, TURKEY Prof. Dr. Gülhan ÖZBAYOĞLU Dean Faculty of Engineering.

Fluorescence and Absorption Spectroscopy of Bio-molecules

RamanRaman. Scattering Tyndall scattering – if small particles are present During Rayleigh scattering (interaction of light with relatively small molecules)

The Spectroscopic Study of Cr 4+ Doped CaO- GeO 2 -Li 2 O-B 2 O 3 (Al 2 O 3 ) transparent glass- ceramics Presentation by: Victor Ortiz School: M.S./H.S.

Hydrostaticity of Pressure Transmitting Medium of 4:1 Methanol: Ethanol at High Pressure and Low Temperature Christopher Salvo 1, Andrew Cornelius 2 1.

1 Materials Science Laboratory, Department of Physics, College of Science, Az Zulfi, Majmaah University, KSA.

The Nobel Prize in Physics 1930 "for his work on the scattering of light and for the discovery of the effect named after him" Sir Chandrasekhara Venkata.

Advanced Analytical Chemistry – CHM 6157® Y. CAIFlorida International University Updated on 9/18/2008Chapter 5Raman Spectrometry Chapter 5 Raman Spectrometry.

Potassium Chlorate Decomposition Under High Pressure Harrison Ruiz 1, Michael Pravica 2, Martin Galley 2 1. Citrus College, 1000 W Foothill Blvd., Glendora,

1 Humberto Foronda Materials Science and Engineering, University of Florida, Gainesville, FL, USA IRES 2011: Undergraduate Research in Leoben, Austria.

Rotation and vibration spectra. Rotational States Molecular spectroscopy: We can learn about molecules by studying how molecules absorb, emit, and scatter.

Spectroscopy and electromagnetic waves. Polarisability of Matter.

Structural Methods in Molecular Inorganic Chemistry, First Edition. David W. H. Rankin, Norbert W. Mitzel and Carole A John Wiley & Sons,

Raman Effect The Raman Effect is the phnomenon of scattering of light, one of the most convincing proofs of the quantum theory Was discovered in 1928 Raman.

The Nb 5 Si 3 sample was prepared by Dr. Ravhi Kumar at the University of Nevada, Las Vegas. A stainless steel gasket with a 130 μm centered circular hole.

National Science Foundation A Study of Half-Metallic Heusler Alloys Chad Berry, Berea College, DMR Explanation: Half metals are metals that conduct.

Determination of Olivine Orientation Dependence Through Raman Spectroscopy Determination of Olivine Orientation Dependence Through Raman Spectroscopy Alexandra.

Atomic Fluorescence Spectroscopy. Background l First significant research by Wineforder and Vickers in 1964 as an analytical technique l Used for element.

ENHANCEMENT OF HIGHLY MAGNEOSTRICTIVE COBALT FERRITE FOR ADVANCED SENSOR AND ACTUATOR APPLICATIONS I. C Nlebedim Wolfson Centre for Magnetics, Cardiff.

Introduction to Molecular Magnets Jason T. Haraldsen Advanced Solid State II 4/17/2007.

Nanoscale Cr 4+ Doped Olivine Crystallites Used In Optical Amplifiers and Lasers Presentation by: Victor Ortiz Mentor: Dr. Alexei Bykov Mentor: Dr. Alexei.

Synthesis and Properties of Magnetic Ceramic Nanoparticles Monica Sorescu, Duquesne University, DMR Outcome Researchers in Duquesne University.

*NASA Jet Propulsion Laboratory

Undergrad Students Michael Friedman Jesse Hopkins Brian Bresslauer

Synthesis and Properties of Magnetic Ceramic Nanoparticles Monica Sorescu, Duquesne University, DMR Outcome Researchers at Duquesne University.

Rahul Joseph Lee Laim.  The incoming light is in-elastically scattered by the vibration of the molecules.  This change in frequency of the light due.

Complex nanostructures promise to provide a platform for dramatically increasing the efficiency of solar energy conversion into the power and fuels needed.

Rotation and vibration spectra. Rotational States Molecular spectroscopy: We can learn about molecules by studying how molecules absorb, emit, and scatter.

TEMPLATE DESIGN © Iron Chromite spinel powders (Fe x Cr 3-x O 4 ) were synthesized in a combustion reaction. After the.

Dr. Owen Clarkin School of Mechanical & Manufacturing Engineering Summary of Material Science Chapter 1: Science of Materials Chapter 2: Properties of.

Raman spectroscopy.

Structural and Magnetic Properties of MgxSrxMnxCo1-3xFe2O4 Nanoparticle ferrites Nadir S. E. Oman School of Chemistry and Physics, University of KwaZulu-Natal,

Abstract High pressure infrared studies of HMX Jennifer Wojno 1, Michael Pravica 2, Martin Galley 2 1. Department of Physics & Astronomy, 102 Natural Science.

High Entropy Alloys Ryan Oliver, University of Wisconsin – Milwaukee Dr. Abraham Munitz, Colorado School of Mines Dr. Michael Kaufman, Colorado School.

V.O. Yukhymchuk, V.M. Dzhagan, V.P. Klad’ko,

M. Sidheswaran, Z. Zhang, L. L. Tavlarides, J. Zhang, E. Khalifa

*Both fresh compounds have Fe3+ in spinel structure*

2D Phase Transition in Monolayer Germanium Selenide

Introduction & Its instrumentation

FORMATION OF CO-CRYSTAL AND CHARACTRIZATION OF ASPIRIN WITH CITRIC ACID AND PERCHLORIC ACID C.Muthuselvi.M.Sc.,M.Phil., Assistant.

Optical band gaps from tetrahedral cation vacancy and variation of cation ordering in NCO films Weiwei Zhao.

Student: Chandler Bernard Mentor: Dr. Joseph Herzog (PHYS)

Raman Spectroscopy A) Introduction IR Raman

Raman Scattering ——CCl4 molecular Raman Spectrum 崔婧

Instrumental Analysis

Raman Spectroscopy A) Introduction IR Raman

Presentation transcript:

+ Laser MicroRaman Study of Reduced Synthesized Spinel Powders Brittany A. Morgan (Seattle University), Alexandra J. Léandre (Bennett College), Michael M. Rodriguez (California Lutheran University), Joseph Lussier (University of San Francisco) Mentors: John W. Farley – University of Nevada Las Vegas Brian D. Hosterman – University of Nevada Las Vegas

2 + What is Raman Spectroscopy? The Raman effect is the excitation or de-excitation of vibrational modes resulting from the inelastic scattering of light from a gas, liquid, or solid with a shift in energy from that of the usually incident radiation.

3 + Spinel Structure

4 + How are spinels made?

5 + Spinel Synthesis Due to the high heat at which they were synthesized, the spinel (Fe 3 O 4 ) form tended to oxidize down to the corundum (Fe 2 O 3 ) structure.

6 + Spinel Synthesis (cont.) The samples were then heated to 700C in a reducing environment of 2% H 2 / 98% Argon gas flow

7 + Raman Microscope

8 + Raman Data A typical Raman Spectra of Iron Chromite

9 + Raman Data (cont.) This table displays the Raman bands for Fe x Cr 3-x O 4. FeCr 2 O Fe 1.2 Cr 1.8 O Fe 1.4 Cr 1.6 O Fe 1.6 Cr 1.4 O Fe 1.8 Cr 1.2 O Fe 2 CrO Fe 2.2 Cr 0.8 O Fe 2.4 Cr 0.6 O Fe 2.6 Cr 0.4 O

10 + Laser Intensity This series of Raman spectra shows the conversion of the spinel phase to γ -Fe 2 O 3 and finally to corundum phase α -Fe 2 O 3

11 + Conclusions The reduction of the chromite powders was successful in producing high crystalline spinel phase samples which was confirmed using XRD. The Raman position of the A1g mode shows no obvious trend on the amount of iron within the iron chromite. Literature shows that the lattice constant change is not linear for Fe x Cr 3-x O 4 and so the dependence upon cation exchange may not be obvious. However, forms of iron oxides are common corrosion products of stainless steel in high temperature environments, and Raman spectroscopy provides a useful tool for identification of these products.

12 + Acknowledgment Support by the REU Program of the National Science Foundation under grant DMR Peter Faught, for allowing us to use his tube oven Dr. Thomas Hartmann, for assistance with XRD data collection 12