Small Angle Neutron Scattering, X-ray Diffraction, Differential Scanning Calorimetry, and Thermogravimetry Studies to Characterize the Properties of Clay Nanocomposites

2009 ◽  
Vol 113 (28) ◽  
pp. 12213-12219 ◽  
Author(s):  
G. Lazzara ◽  
S. Milioto ◽  
M. Gradzielski ◽  
S. Prevost
Keyword(s):  
Differential Scanning Calorimetry ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray

scholarly journals DMSO-induced dehydration of DPPC membranes studied by X-ray diffraction, small-angle neutron scattering, and calorimetry

1999 ◽  
Vol 286 (1-2) ◽  
pp. 195-202 ◽  
Author(s):  
M.A. Kiselev ◽  
P. Lesieur ◽  
A.M. Kisselev ◽  
C. Grabielle-Madelmond ◽  
M. Ollivon
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
X Ray Diffraction ◽  
X Ray ◽  
And Calorimetry

Thermal behavior, structure, and dynamics of low-temperature water confined in mesoporous organosilica by differential scanning calorimetry, X-ray diffraction, and quasi-elastic neutron scattering

2012 ◽  
Vol 85 (1) ◽  
pp. 289-305 ◽  
Author(s):  
Mai Aso ◽  
Kanae Ito ◽  
Hiroaki Sugino ◽  
Koji Yoshida ◽  
Takeshi Yamada ◽  
...  
Keyword(s):  
Differential Scanning Calorimetry ◽  
Water Molecule ◽  
Neutron Scattering ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Elastic Neutron ◽  
X Ray ◽  
Mesoporous Organosilica ◽  
Condensed Water ◽  
Elastic Neutron Scattering

Differential scanning calorimetry (DSC), X-ray diffraction (XRD), and quasi-elastic neutron scattering (QENS) measurements have been made at 200~330 K for capillary-condensed water confined in periodic mesoporous organosilica (PMO) materials with the phenyl groups embedded in silica matrix (Ph-PMO; pore diameter 30 Å). The DSC data showed that the capillary-condensed water in Ph-PMO freezes at 228 K. X-ray radial distribution functions (RDFs) showed that the tetrahedral-like hydrogen-bonded structure of water is distorted in Ph-PMO pores, compared with bulk water; however, with lowering temperature the tetrahedral moiety of water is gradually recovered in the pores. Below the freezing point, cubic ice Ic was formed in the Ph-PMO pores. The QENS data showed that the translational diffusion constant and the residence time and the rotational relaxation time of water molecule in Ph-PMO are comparable with those in bulk. The corresponding activation energies suggested that the more hydrophobic the nature of the wall is, the smaller the activation energy of diffusion and rotation of a water molecule; this implies that water molecules confined in the hydrophobic pores are present in the core of the pores, whereas those in the hydrophilic pores strongly interact with the silanol groups.

Structural characterization of manganese-substituted nanocrystalline zinc oxide using small-angle neutron scattering and high-resolution transmission electron microscopy

2009 ◽  
Vol 42 (6) ◽  
pp. 1085-1091 ◽  
Author(s):  
B. Roy ◽  
B. Karmakar ◽  
J. Bahadur ◽  
S. Mazumder ◽  
D. Sen ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Zinc Oxide ◽  
High Resolution ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron

A series of zinc oxide (ZnO) nanoparticles, substituted with manganese di-oxide, have been synthesized through a modified ceramic route using urea as a fuel. X-ray diffraction and high-resolution transmission electron microscopy studies indicate that the sizes of the ZnO particles are of nanometer dimension. Particles remain as single phase when the doping concentration is below 15 mol%. Small-angle neutron scattering indicates fractal-like agglomerates of these nanoparticles in powder form. The size distributions of the particles have been estimated from scattering experiments as well as microscopy studies. The average particle size estimated from small-angle scattering experiments was found to be somewhat more than that obtained from X-ray diffraction or electron microscopy measurement.

Silver behenate powder as a possible low-angle calibration standard for small-angle neutron scattering

1998 ◽  
Vol 31 (6) ◽  
pp. 957-959 ◽  
Author(s):  
R. Gilles ◽  
U. Keiderling ◽  
A. Wiedenmann
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Angular Range ◽  
Calibration Standard ◽  
X Ray Diffraction ◽  
Transmission Method ◽  
Wavelength Calibration ◽  
X Ray ◽  
Flight Measurements

Small-angle neutron scattering (SANS) is a transmission method working in the angular range 0.4–6° (2θ). In this paper, silver behenate powder [CH3(CH2)20COOAg] (referred to as `AgBE'), one of the very few materials featuring Bragg reflections in the angular range accessible to SANS instruments, is suggested as a possible new SANS wavelength calibration standard. In the past, this powder has been successfully tested as a calibration standard in low-angle X-ray diffraction. Results of new SANS wavelength calibration measurements performed with AgBE and with the traditional method of time-of-flight measurements are presented and compared with low-angle X-ray diffraction measurements.

Structural and Electronic Properties of Zr-Ti-Cu-Ni-Be Alloys

2000 ◽  
Vol 644 ◽  
Author(s):  
Jörg F. Löffler ◽  
X.-P. Tang ◽  
Yue Wu ◽  
William L. Johnsona
Keyword(s):  
Differential Scanning Calorimetry ◽  
Small Angle Neutron Scattering ◽  
Crystallization Behavior ◽  
Volume Fraction ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Annealing Temperatures ◽  
Composition Space ◽  
Structural And Electronic Properties

AbstractWe present crystallization studies on Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vit1) and on other alloys, where the (Zr,Ti) and (Cu,Be) contents, along the line in composition space connecting Vit1 and Zr46.8Ti8.2Cu7.5Ni10Be27.5 (Vit4), were varied. Results from x-ray diffraction (XRD), small-angle neutron scattering (SANS) and differential scanning calorimetry (DSC) are combined to describe the crystallization behavior of these alloys at deep undercooling. SANS gives evidence for decomposition and the formation of nanometer sized crystals below a critical temperature Tc, which varies drastically as a function of composition. When Tc intersects with the glass transition temperature Tg, changes in the crystallization behavior are observed by DSC and XRD. At annealing temperatures near Tg, XRD resolves quasicrystalline phases for all alloy compositions from Vit1 to Vit4. From 9Be nuclear magnetic resonance (NMR) experiments performed on Vit1 upon annealing, we obtain information about the electronic structure and volume fraction of Be containing crystalline and quasicrystalline phases.

Investigations on Fractal Nanostructure of Zinc Oxide by Small Angle Neutron Scattering (SANS)

2014 ◽  
Vol 895 ◽  
pp. 531-534
Author(s):  
Rehana Razali ◽  
Edy. Giri Rachman Putra ◽  
Abdul Aziz Mohamed ◽  
Wan Haliza Abd Majid ◽  
W.A.T. Wan Abdullah ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Primary Particle ◽  
Morphological Structure ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Field Emission Electron Microscopy

The zinc oxide nanoparticles were synthesized by solvothermal method for 18 h at150 ̊ C with presence of DEA. The molar ratio of Zn2+solution and DEA was fixed at 1:1. The nanostructure was studied using Small Angle Neutron Scattering (SANS) in BATAN, Indonesia. From calculation, it shows that the material has surface fractal with primary particle size of 25 nm and agglomerate size of ̴ 200 nm. X-ray diffraction (XRD) was done and the the crystallite size was calculated using Scherrer equation. Field emission electron microscopy (FESEM) was done to observe the morphological structure. It shows that the sphere-like agglomerates construct of primary nanoparticles of ZnO.

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