The Experts below are selected from a list of 225 Experts worldwide ranked by ideXlab platform
Geetha Balakrishnan - One of the best experts on this subject based on the ideXlab platform.
-
Growth of large single crystals of rare earth hexaborides
Journal of Crystal Growth, 2020Co-Authors: Geetha Balakrishnan, Martin R. Lees, D. Mck. PaulAbstract:Single crystal growth of several rare earth hexaborides has been carried out by the floating zone technique. A high power Xenon Arc Lamp image furnace was used for the crystal growth. Large high quality crystals of LaB$_{6}$, CeB$_{6}$, PrB$_{6}$ and NdB$_{6}$, about 1 cc in volume have been obtained. Crystals of all these compounds have also been grown using enriched $^{11}$B isotope for use in neutron scattering experiments.Comment: 3 pages, 3 figures, in press (J. Crystal Growth
-
Single-Crystal Growth of Metallic Rare-Earth Tetraborides by the Floating-Zone Technique
Crystals, 2019Co-Authors: Daniel C. Brunt, Martin R. Lees, Monica Ciomaga Hatnean, Oleg Petrenko, Geetha BalakrishnanAbstract:The rare-earth tetraborides are exceptional in that the rare-earth ions are topologically equivalent to the frustrated Shastry-Sutherland lattice. In this paper, we report the growth of large single crystals of RB 4 (where R = Nd, Gd → Tm, and Y) by the floating-zone method, using a high-power Xenon Arc-Lamp furnace. The crystal boules have been characterized and tested for their quality using X-ray diffraction techniques and temperature- and field-dependent magnetization and AC resistivity measurements.
-
Single crystal growth of CrB2 using a high-temperature image furnace
Journal of Crystal Growth, 2005Co-Authors: Geetha Balakrishnan, S. Majumdar, Martin R. Lees, D. Mck. PaulAbstract:Abstract Single crystals of CrB 2 have been grown by the floating zone technique. A high-temperature Xenon Arc Lamp image furnace was used for the crystal growth. The crystals grown by this method are found to be of high quality and are readily characterised by the magnetic transition at T ∼ 88 K , as measured by magnetic susceptibility measurements.
-
Growth of large single crystals of rare earth hexaborides
Journal of Crystal Growth, 2003Co-Authors: Geetha Balakrishnan, Martin R. Lees, D. Mck. PaulAbstract:Abstract Single crystal growth of several rare earth hexaborides has been carried out by the floating zone technique. A high-power Xenon Arc Lamp image furnace was used for the crystal growth. Large high-quality crystals of LaB 6 , CeB 6 , PrB 6 and NdB 6 , about 1 cm 3 in volume have been obtained. Crystals of all these compounds have also been grown using enriched 11 B isotope for use in neutron scattering experiments.
D. Mck. Paul - One of the best experts on this subject based on the ideXlab platform.
-
Growth of large single crystals of rare earth hexaborides
Journal of Crystal Growth, 2020Co-Authors: Geetha Balakrishnan, Martin R. Lees, D. Mck. PaulAbstract:Single crystal growth of several rare earth hexaborides has been carried out by the floating zone technique. A high power Xenon Arc Lamp image furnace was used for the crystal growth. Large high quality crystals of LaB$_{6}$, CeB$_{6}$, PrB$_{6}$ and NdB$_{6}$, about 1 cc in volume have been obtained. Crystals of all these compounds have also been grown using enriched $^{11}$B isotope for use in neutron scattering experiments.Comment: 3 pages, 3 figures, in press (J. Crystal Growth
-
Single crystal growth of CrB2 using a high-temperature image furnace
Journal of Crystal Growth, 2005Co-Authors: Geetha Balakrishnan, S. Majumdar, Martin R. Lees, D. Mck. PaulAbstract:Abstract Single crystals of CrB 2 have been grown by the floating zone technique. A high-temperature Xenon Arc Lamp image furnace was used for the crystal growth. The crystals grown by this method are found to be of high quality and are readily characterised by the magnetic transition at T ∼ 88 K , as measured by magnetic susceptibility measurements.
-
Growth of large single crystals of rare earth hexaborides
Journal of Crystal Growth, 2003Co-Authors: Geetha Balakrishnan, Martin R. Lees, D. Mck. PaulAbstract:Abstract Single crystal growth of several rare earth hexaborides has been carried out by the floating zone technique. A high-power Xenon Arc Lamp image furnace was used for the crystal growth. Large high-quality crystals of LaB 6 , CeB 6 , PrB 6 and NdB 6 , about 1 cm 3 in volume have been obtained. Crystals of all these compounds have also been grown using enriched 11 B isotope for use in neutron scattering experiments.
Peter Jackson - One of the best experts on this subject based on the ideXlab platform.
-
performance validation of an improved Xenon Arc Lamp based ccd camera system for multispectral imaging in proteomics
Proteomics, 2005Co-Authors: Elaine Scrivener, Peter Jackson, Brett A Boghigian, Eva Golenko, Alla Bogdanova, Alvydas Mikulskis, Eric Denoyer, Patrick Courtney, Mary F Lopez, Wayne F PattonAbstract:Advances in gel-based nonradioactive protein expression and PTM detection using fluorophores has served as the impetus for developing analytical instrumentation with improved imaging capabilities. We describe a CCD camera-based imaging instrument, equipped with both a high-pressure Xenon Arc Lamp and a UV transilluminator, which provides broad-band wavelength coverage (380-700 nm and UV). With six-position filter wheels, both excitation and emission wavelengths may be selected, providing optimal measurement and quantitation of virtually any dye and allowing excellent spectral resolution among different fluorophores. While spatial resolution of conventional fixed CCD camera imaging systems is typically inferior to laser scanners, this problem is circumvented with the new instrument by mechanically scanning the CCD camera over the sample and collecting multiple images that are subsequently automatically reconstructed into a complete high-resolution image. By acquiring images in succession, as many as four different fluorophores may be evaluated from a gel. The imaging platform is suitable for analysis of the wide range of dyes and tags commonly encountered in proteomics investigations. The instrument is unique in its capabilities of scanning large areas at high resolution and providing accurate selectable illumination over the UV/visible spectral range, thus maximizing the efficiency of dye multiplexing protocols.
-
A unique charge-coupled device/Xenon Arc Lamp based imaging system for the accurate detection and quantitation of multicolour fluorescence
Electrophoresis, 2001Co-Authors: Carole A. Spibey, Peter Jackson, Klaus HerickAbstract:In recent years the use of fluorescent dyes in biological applications has dramatically increased. The continual improvement in the capabilities of these fluorescent dyes demands increasingly sensitive detection systems that provide accurate quantitation over a wide linear dynamic range. In the field of proteomics, the detection, quantitation and identification of very low abundance proteins are of extreme importance in understanding cellular processes. Therefore, the instrumentation used to acquire an image of such samples, for spot picking and identification by mass spectrometry, must be sensitive enough to be able, not only, to maximise the sensitivity and dynamic range of the staining dyes but, as importantly, adapt to the ever changing portfolio of fluorescent dyes as they become available. Just as the available fluorescent probes are improving and evolving so are the users application requirements. Therefore, the instrumentation chosen must be flexible to address and adapt to those changing needs. As a result, a highly competitive market for the supply and production of such dyes and the instrumentation for their detection and quantitation have emerged. The instrumentation currently available is based on either laser/photomultiplier tube (PMT) scanning or Lamp/charge-coupled device (CCD) based mechanisms. This review briefly discusses the advantages and disadvantages of both System types for fluorescence imaging, gives a technical overview of CCD technology and describes in detail a unique Xenon/are Lamp CCD based instrument, from PerkinElmer Life Sciences. The Wallac-1442 ARTHUR is unique in its ability to scan both large areas at high resolution and give accurate selectable excitation over the whole of the UV/visible range. It operates by filtering both the excitation and emission wavelengths, providing optimal and accurate measurement and quantitation of virtually any available dye and allows excellent spectral resolution between different fluorophores. This flexibility and excitation accuracy is key to multicolour applications and future adaptation of the instrument to address the application requirements and newly emerging dyes.
Dahe Gu - One of the best experts on this subject based on the ideXlab platform.
-
Time-resolved spectra of solar simulators employing metal halide and Xenon Arc Lamps
Solar Energy, 2015Co-Authors: Xue Dong, Zhiwei Sun, Graham J. Nathan, Peter J. Ashman, Dahe GuAbstract:The time-resolved spectra of the irradiation emitted from solar simulators employing the two types of high-intensity discharge Arc Lamps that are commonly used in solar simulators, i.e. metal halide (here 6. kW) and Xenon Arc (here 5. kW) Lamps, are reported. The Lamp emission was recorded by a fast-response photodiode, which reveals that the amplitude of oscillating irradiation intensity from the metal halide Lamp is approximately 60% of the peak intensity, while its oscillation frequency is twice of the frequency of the AC power supply, here 100. Hz. The irradiation of the Xenon Arc Lamp is powered by a modulated DC supply to oscillate at 300. Hz, with an amplitude that is found to be only approximately 9% that of the peak intensity. An intensified CCD camera, which was coupled with a spectrometer operating in a range of 350-900. nm, was synchronized with the Lamp to provide phase-resolved spectra. The irradiation from the Xenon Arc Lamp was found to be spectrally stable with time; while that from the metal halide Lamp varies significantly throughout oscillation cycle, especially at the shorter-wavelengths of below 550. nm. All spectra were calibrated to reveal that the time-averaged spectrum of the simulator with a metal halide Lamp matches the solar spectrum significantly better than does that from a Xenon Arc Lamp. The reflecting surface of polished ellipsoidal reflector was found to reduce the intensity of selected frequency bands by up to 10%, while that from both the polished ellipsoidal reflector and conical concentrator was found to reduce the intensity in selected frequency bands by up to 20%.
Martin R. Lees - One of the best experts on this subject based on the ideXlab platform.
-
Growth of large single crystals of rare earth hexaborides
Journal of Crystal Growth, 2020Co-Authors: Geetha Balakrishnan, Martin R. Lees, D. Mck. PaulAbstract:Single crystal growth of several rare earth hexaborides has been carried out by the floating zone technique. A high power Xenon Arc Lamp image furnace was used for the crystal growth. Large high quality crystals of LaB$_{6}$, CeB$_{6}$, PrB$_{6}$ and NdB$_{6}$, about 1 cc in volume have been obtained. Crystals of all these compounds have also been grown using enriched $^{11}$B isotope for use in neutron scattering experiments.Comment: 3 pages, 3 figures, in press (J. Crystal Growth
-
Single-Crystal Growth of Metallic Rare-Earth Tetraborides by the Floating-Zone Technique
Crystals, 2019Co-Authors: Daniel C. Brunt, Martin R. Lees, Monica Ciomaga Hatnean, Oleg Petrenko, Geetha BalakrishnanAbstract:The rare-earth tetraborides are exceptional in that the rare-earth ions are topologically equivalent to the frustrated Shastry-Sutherland lattice. In this paper, we report the growth of large single crystals of RB 4 (where R = Nd, Gd → Tm, and Y) by the floating-zone method, using a high-power Xenon Arc-Lamp furnace. The crystal boules have been characterized and tested for their quality using X-ray diffraction techniques and temperature- and field-dependent magnetization and AC resistivity measurements.
-
Single crystal growth of CrB2 using a high-temperature image furnace
Journal of Crystal Growth, 2005Co-Authors: Geetha Balakrishnan, S. Majumdar, Martin R. Lees, D. Mck. PaulAbstract:Abstract Single crystals of CrB 2 have been grown by the floating zone technique. A high-temperature Xenon Arc Lamp image furnace was used for the crystal growth. The crystals grown by this method are found to be of high quality and are readily characterised by the magnetic transition at T ∼ 88 K , as measured by magnetic susceptibility measurements.
-
Growth of large single crystals of rare earth hexaborides
Journal of Crystal Growth, 2003Co-Authors: Geetha Balakrishnan, Martin R. Lees, D. Mck. PaulAbstract:Abstract Single crystal growth of several rare earth hexaborides has been carried out by the floating zone technique. A high-power Xenon Arc Lamp image furnace was used for the crystal growth. Large high-quality crystals of LaB 6 , CeB 6 , PrB 6 and NdB 6 , about 1 cm 3 in volume have been obtained. Crystals of all these compounds have also been grown using enriched 11 B isotope for use in neutron scattering experiments.
