X-ray powder diffraction analysis of silver behenate, a possible low-angle diffraction standard

Huang, Ting; Toraya, Hideo; Blanton, Thomas N.; Wu, Yunshan

doi:10.1107/s0021889892009762

Cited by 607 publications

(521 citation statements)

References 8 publications

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“…External calibration to convert the measured 4096 channels to 2θ degrees was applied using cubic Na 2 Ca 2 Al 2 F 4 (high angle calibration) 39 mixed with silver behenate (low angle calibration). 40 The time of acquisition was set to 17 h to obtain reflections with exploitable intensities.…”

Section: Methodsmentioning

confidence: 99%

X-ray Structural Investigation of Nonsymmetrically and Symmetrically Alkylated [1]Benzothieno[3,2-b]benzothiophene Derivatives in Bulk and Thin Films

Gbabode

Dohr

Niebel

et al. 2014

ACS Appl. Mater. Interfaces

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A detailed structural study of the bulk and thin film phases observed for two potential high performance organic semi conductors has been carried out. The molecules are based on [1]benzothieno[3,2 b]benzothiophene (BTBT) as conjugated core and octyl side groups, which are anchored either symmetrically at both sides of the BTBT core (C 8 −BTBT−C 8 ) or nonsymmetrically at one side only (C 8 −BTBT). Thin films of different thickness (8−85 nm) have been prepared by spin coating for both systems and analyzed by combining specular and grazing incidence X ray diffraction. In the case of C 8 −BTBT−C 8 , the known crystal structure obtained from single crystal investigations is observed within all thin films, down to a film thickness of 9 nm. In the case of C 8 −BTBT, the crystal structure of the bulk phase has been determined from X ray powder diffraction data with a consistent matching of experimental and calculated X ray diffraction patterns (Rwp = 5.8%). The packing arrangement of C 8 −BTBT is similar to that of C 8 −BTBT−C 8 , that is, consisting of a lamellar structure with molecules arranged in a "herringbone" fashion, yet with lamellae composed of two head to head (or tail to tail as the structure is periodic) superimposed molecules instead of only one molecule for C 8 −BTBT−C 8 . As for C 8 −BTBT−C 8 ,we demonstrate that the same phase is observed in bulk and thin films for C 8 −BTBT whatever the film thickness investigated.

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Section: Methodsmentioning

confidence: 99%

X-ray Structural Investigation of Nonsymmetrically and Symmetrically Alkylated [1]Benzothieno[3,2-b]benzothiophene Derivatives in Bulk and Thin Films

Gbabode

Dohr

Niebel

et al. 2014

ACS Appl. Mater. Interfaces

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“…To calculate the d-spacing from the 2D images, silver behenate diffraction peaks were used as an external reference. 25 …”

Section: Saxs Using Synchrotron Microbeam X-ray Radiationmentioning

confidence: 99%

Structure and growth behavior of centimeter-sized helical oleate assemblies formed with assistance of medium-length carboxylic acids

et al. 2015

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The nonequilibrium organization of self-assemblies from small building-block molecules offers an attractive and essential means to develop advanced functional materials and to understand the intrinsic nature of life systems. Fatty acids are well-known amphiphiles that form self-assemblies of several shapes. Here, we found that the lengths of helical structures of oleic acid formed in a buffered aqueous solution are dramatically different by the presence or absence of certain amphiphilic carboxylic acids. For example, under the coexistence of a small amount of N-decanoyl-L-alanine, we observed the formation of over 1-centimeter-long helical assemblies of oleate with a regular pitch and radius, whereas mainly less than 100 µm-long helices formed without this additive.Such long helical assemblies are unique in terms of their highly dimensional helical structure and growth dynamics. Results from the real-time observation of self-assembly formation, site-selective small-angle X-ray scattering, high-performance liquid chromatography analysis, and pH titration experiments suggested that the coexisting carboxylates assist in elongation by supplying oleate molecules to a scaffold for oleate helical assembly.

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“…The sample-to-detector distance was 1.9 m, which leads to the scattering vector range 0.1 nm − < s < 3.55 nm −1 . The detector s-axis was calibrated using silver behenate [23]. The data were normalized, corrected for detector response and integrated using SAXS data reduction software Bli711 [22].…”

Section: Saxsmentioning

confidence: 99%

Structure and Morphology of Gold Nanoparticles in Solution Studied by TEM, SAXS and UV-Vis

2012

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Gold nanoparticles have a great number of applications, among others in material sciences, biology and medicine. A method for the synthesis of gold nanoparticles in solution with the use of gemini surfactant was proposed and the nanoparticles obtained were subjected to thorough characterisation. The method proposed is a modi cation of the Turkevich method, based on reduction of tetrachloroauric acid in the presence of trisodium citrate and a dicationic (gemini) surfactant 1,1 ′ -(1,4-butan)bis(3-dodecyloxymethylimidazolium) di-propionate. Morphology and size distribution of gold nanoparticles obtained were examined by the transmission electron microscopy (TEM), UV Vis spectroscopy and small angle scattering of synchrotron radiation (SAXS). The plasmon resonance of the nanoparticles obtained was observed in the wavelength range corresponding to the presence of gold nanoparticles with sizes ranging from 5 to 100 nm. TEM images con rmed that the spherical shape of nanoparticles was dominated in reference solutions prepared of sodium citrate and tetrachloroauric acid. In the solutions prepared with addition of gemini surfactant, the gold nanoparticles of triangular morphology were observed.

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X-ray powder diffraction analysis of silver behenate, a possible low-angle diffraction standard

Cited by 607 publications

References 8 publications

X-ray Structural Investigation of Nonsymmetrically and Symmetrically Alkylated [1]Benzothieno[3,2-b]benzothiophene Derivatives in Bulk and Thin Films

X-ray Structural Investigation of Nonsymmetrically and Symmetrically Alkylated [1]Benzothieno[3,2-b]benzothiophene Derivatives in Bulk and Thin Films

Structure and growth behavior of centimeter-sized helical oleate assemblies formed with assistance of medium-length carboxylic acids

Structure and Morphology of Gold Nanoparticles in Solution Studied by TEM, SAXS and UV-Vis

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