Clark Atlanta University Center for Surface Chemistry and Catalysis Instrument Capabilities

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1 Center for Surface Chemistry and Catalysis Instrument Capabilities For information contact: Dr. Eric Mintz Research Center for Science and Technology Clark Atlanta University Atlanta, Georgia Phone: Fax: Dr. Mark Mitchell Catalysis Laboratory Research Center for Science and Technology Clark Atlanta University Atlanta, Georgia Phone: Fax:

2 Center for Surface Chemistry and Catalysis The Center for Surface Chemistry and Catalysis Laboratory at Clark Atlanta University is housed in the Research Center for Science and Technology. Dr. Eric A. Mintz and Dr. Mark B. Mitchell direct the Laboratory. The main goal of this laboratory is to provide a resource for the many investigations in catalysis that are carried out throughout the Research Center. Table 1 lists the main capabilities that are available in the laboratory and the instruments associated with each. In addition to the capabilities shown in the table, a number of investigators have microreactor systems with various analytical instruments connected to them, such as mass spectrometers and infrared gas analyzers, for particular types of catalytic investigations. TABLE 1. CAPABILITIES Parameter EPA Method Instrument Surface Area D (multi-pt. BET), D e1 (single-pt. Micromeritics Gemini Series Surface Area Analyzer BET), C Pore Volume D (mercury intrusion Micromeritics Pore Sizer 9320 Temperature Programmed Desorption, Temperature Programmed Reaction volume), D E , E Cahn TG-151 Thermogravimetric Experiment Station Particle Size D Cilas Quantachrome 1064

3 Infrared and Raman Spectroscopy Laboratory Instrument Capabilities For information contact: Dr. Mark Mitchell Infrared and Raman Spectroscopy Laboratory Research Center for Science and Technology Clark Atlanta University Atlanta, Georgia Phone: Fax:

4 Infrared and Raman Spectroscopy Laboratory (IRSL) The Infrared and Raman Spectroscopy Laboratory (IRSL) at Clark Atlanta University is housed in the Research Center for Science and Technology. Dr. Mark B. Mitchell is the director of the IRSL. The main goal of this laboratory is to carry out research involving the use of infrared and/or Raman spectroscopy which requires the use of sophisticated instrumentation or capabilities. In addition, the IRSL is a resource for others interested in advanced infrared or Raman techniques to obtain training in these techniques so that they can be applied to their particular research efforts. INFRARED SPECTROSCOPY The main instrument for infrared spectroscopy in the IRSL is a Nicolet Magna 750 FT-IR spectrometer. The main sample compartment of the instrument can be configured for Near-IR, Mid-IR or Far-IR work, such that spectra can be measured all the way from 1.1 mm to 200 mm (9,000 cm -1 to 50 cm -1 ), at a resolution of cm -1. This is achieved through the use of a combination of different sources, beamsplitters, and detectors. An auxiliary sample compartment with a dedicated fast, liquid-nitrogen cooled infrared detector is typically dedicated to the in situ study of catalysts. A Nicolet Nic-Plan microscope with a computer-controlled positioning stage is also coupled directly to the main interferometer. In Table 1 are listed the techniques and capabilities which currently exist in the IRSL for infrared studies. The ASTM methods which apply are outlined in E e1. In addition, there are a wide variety of specific-compound methods outlined in ASTM methods which can be carried out easily using the equipment in the IRSL. RAMAN SPECTROSCOPY Two instruments are available in the IRSL for Raman Spectroscopy. One instrument is a Nicolet Fourier transform Raman spectrometer (FT-Raman) which uses a long wavelength Nd- YAG laser for excitation. This technique has the advantage that materials which fluoresce can be examined using Raman spectroscopy via this method. The other instrument uses a shorter wavelength Ar + -ion laser for excitation, either 514 nm or 488 nm currently, although the other Ar + -ion laser wavelengths are available as well as a dye laser if appropriate filters are purchased. A 0.5m Spex monochromator with CCD detector is available for use with the excitation source. A macro chamber is available for normal samples as well as an Olympus microscope for micro- Raman studies.

5 Sample Type Solids/Powders/Fibers Polymers Liquids Thin Films Sample Type Solids/Powders/Fibers Polymers Liquids Thin Films TABLE 1. INFRARED METHODS Method KBr Pellet Nujol Mull Ambient Diffuse Reflectance Controlled Environment Diffuse Reflectance Micro-Reflectance Thin Film Transmission ATR Controlled Temperature ATR External Reflectance Micro-ATR Micro-Reflectance Micro-Transmission Thin Film Transmission ATR Controlled Temperature ATR Micro-Reflectance Micro-ATR Micro-Transmission Transmission ATR Controlled Temperature ATR External Reflectance Micro-Reflectance Micro-ATR Micro-Transmission TABLE 2. RAMAN METHODS Method Standard Raman Scattering (Ar + Ion and dye laser) Micro Raman (Ar + Ion and dye laser) FT-Raman (Nd-YAG) Standard Raman Scattering (Ar + Ion and dye laser Micro-Raman (Ar + Ion and dye laser) FT-Raman (Nd-YAG) Standard Raman Scattering (Ar + Ion and dye laser) Micro Raman (Ar + Ion and dye laser) FT-Raman (Nd-YAG) Standard Raman Scattering (Ar + Ion and dye laser) Micro Raman (Ar + Ion and dye laser) FT-Raman (Nd-YAG)

6 Nuclear Magnetic Resonance (NMR) Laboratory Instrument Capabilities For information contact: Dr. Eric A. Mintz, Director HiPPAC Center Research Center for Research & Technology Clark Atlanta University Atlanta, Georgia office fax

7 Nuclear Magnetic Resonance (NMR) Laboratory The NMR Laboratory at Clark Atlanta Universities housed in the Research Center for Research and technology. The NMR centers main function it to provide NMR services to the University and Industrial Communities. In addition, the NMR laboratory provides for the training of students on the use on our NMR spectrometers. Capability Method Instrument Solution 80 MHz 1 H and User Defined Bruker AC80 hetero-nuclear NMR ASTM E386-90(1995)e1 Double resonance and 2-D NMR Solution 250 MHz 1 H and hetero-nuclear NMR Solution 400 MHz 1 H and hetero-nuclear NMR, Solid State 50 MHz NMR 13 C and other hetero-nuclear NMR User Defined ASTM E386-90(1995)e1 Double resonance and 2-D NMR User Defined ASTM E386-90(1995)e1 Double resonance and 2-D NMR User Defined Magic Angle Spinning Bruker WM250 Bruker ARX400 Bruker MSL200

8 Scanning Probe Microscopy TM Microscopes AutoProbe CP Research Scanning Probe Microscope This is a full-featured research scanning probe microscope that provides superior high resolution for physical and material sciences. Its standard scanner is precise enough to image samples from atomic scales to integrated circuits. For imaging areas of up to 100x100 microns, it employs ScanMaster, a patented closed-loop scan-linearization system. Integrated color optics and a motorized z stage make changing tips and samples, and finding features fast and easy. The unit comes with 20x objective lens, a 5 micron x, y and 1.5 micron z scanner, MFM toolkit, and ProScan data acquisition software. The Auto Probe CP Research offers the full compliment of SPM techniques, making it ideal for such applications as material science, nanolithography, nanomanipulation and polymer characterization. The unit comes with a host of standard and optional scan modes that provide complete surface characterization of samples (maximum size of 2 in. x 2 in. x 1 in.) in both air and liquid. The available operational modes include: Scanning tunneling microscopy (STM) Atomic force microscopy (AFM) Lateral Force microscopy {LFM) Intermittent contact AFM Non-contact AFM Phase imaging Magnetic force microscope (MFM) TM Microscopes TMX 2100 Explorer SPM Base System The explorer performs the full range of scanning probe microscope applications on samples of any size. Sample size is unlimited without translation stage and may be 50 mm diameter to 15 mm high with translation stage. Scan size options allow scan samples from atomic resolution to areas up to 100x100 microns with 10-micron z capability for studying rough surfaces. The systems unique modular design and numerous add-ons allow easy optimization and flexibility in application in both liquid and air. The electronics are in the head making it a better instrument for liquid samples compared to the AutoProbe CP Research unit. Its open architecture, advanced software, and large variety of image modes make the unit ideal for a range of life sciences, materials and polymer studies. The unit comes with SPM head, dry and liquid scanners, optical microscope with CCD camera, sample translation stage, electronic control, cantilevers, I/O-modulation option for non-contact AFM, and SPMLab software and data acquisition module. The available operational modes include: Contact mode Tapping mode

9 Scanning thermal microscopy Phase Imaging Force modulation microscopy Scanning electrical potential microscopy

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