Ultrasmall-angle X-ray scattering analysis of photonic crystal structure

Abramova, Vera; Sinitskii, Alexander; Григорьева, Н. А.; Grigor’ev, S. V.; Белов, Д. В.; Petukhov, Andrei V.; Мистонов, А. А.; Vasileva, A. V.; Tret’yakov, Yu. D.

doi:10.1134/s1063776109070048

Cited by 13 publications

(10 citation statements)

References 28 publications

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“…24 This method was successfully used to investigate different stacking sequences in opal-like structures based on polystyrene, or silicon oxide spheres, 24,25 and of inverse opals based on various oxide materials (TiO 2 , SiO 2 , and Fe 2 O 3 ). 26,27 The measurements were taken at , which lie in the film plane; and (b) crystallographic structure of the inverse opal. In (b): larger "spheres" denote the positions of the centers of cubic (C) basic elements, and the smaller spheres denote ones for the nanotetrahedrons.…”

Section: Methodsmentioning

confidence: 99%

“…Details of the investigation of IO imperfections are given in a number of papers. [24][25][26][27]39,40 One can consider IO as an assembly of small metallic particles duplicating the shape of the voids between the spheres and connected to each other via thin (several tens of nanometers) and long (several hundreds of nanometers) cross pieces. Hence, the voids of the artificial opal have quasicubic and quasitetrahedral shapes with concave surfaces.…”

Section: Methodsmentioning

confidence: 99%

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Microwave properties of Ni-based ferromagnetic inverse opals

et al. 2012

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Investigations of microwave properties of Ni-based inverse ferromagnetic opal-like film with the [111] axis of the fcc structure along the normal direction to the film have been carried out in the 2-18 GHz frequency band. We observed multiple spin wave resonances for the magnetic field applied perpendicular to the film, i.e., along the [111] axis of this artificial crystal. For the field applied in the film plane, a broad band of microwave absorption is observed, which does not contain a fine structure. The field ranges of the responses observed are quite different for these two magnetization directions. This suggests a collective magnetic ground state or shape anisotropy and collective microwave dynamics for this foam-like material. This result is in agreement with SQUID measurements of hysteresis loops for the material. Two different models for this collective behavior are suggested that satisfactorily explain the major experimental results.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Microwave properties of Ni-based ferromagnetic inverse opals

et al. 2012

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“…Numerous studies of the crystal structure of spherical colloids have been conducted based on USAXS (Fö rster et al, 2011;Vos et al, 1997;Petukhov et al, 2001;Abramova et al, 2009), light-scattering methods (Pusey et al, 1989;Ackerson, 1990), transmission electron microscopy (Sakamoto et al, 2002) and confocal fluorescence microscopy (van Blaaderen & Wiltzius, 1995;Gasser et al, 2001). Of these methods, USAXS has some notable advantages, including the capability of in situ measurement of opaque samples, measurement of neat samples without fluorescent dye, quantitative results etc.…”

Section: Introductionmentioning

confidence: 99%

In situultra-small-angle X-ray scattering study under uniaxial stretching of colloidal crystals prepared by silica nanoparticles bearing hydrogen-bonding polymer grafts

Ishige

Williams

Higaki

et al. 2016

Int Union Crystallogr J

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A molded film of single-component polymer-grafted nanoparticles (SPNP), consisting of a spherical silica core and densely grafted polymer chains bearing hydrogen-bonding side groups capable of physical crosslinking, was investigated by in situ ultra-small-angle X-ray scattering (USAXS) measurement during a uniaxial stretching process. Static USAXS revealed that the molded SPNP formed a highly oriented twinned face-centered cubic (f.c.c.) lattice structure with the [11À1] plane aligned nearly parallel to the film surface in the initial state. Structural analysis of in situ USAXS using a model of uniaxial deformation induced by rearrangement of the nanoparticles revealed that the f.c.c. lattice was distorted in the stretching direction in proportion to the macroscopic strain until the strain reached 35%, and subsequently changed into other f.c.c. lattices with different orientations. The lattice distortion and structural transition behavior corresponded well to the elastic and plastic deformation regimes, respectively, observed in the stress-strain curve. The attractive interaction of the hydrogen bond is considered to form only at the top surface of the shell and then plays an effective role in cross-linking between nanoparticles. The rearrangement mechanism of the nanoparticles is well accounted for by a strong repulsive interaction between the densely grafted polymer shells of neighboring particles.

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“…Experiments with microradian synchrotron diffraction were performed on the Ni inverse PhC deposited onto the conductive substrate; some of experimental images are shown in Figure 2. Presence of two almost symmetrically positioned diffraction maxima in the rocking curves for the most of reflexes indicates that the crystal is composed from blocks with different sequences of packing layers, ABCABC-and ACBACB-type stacking [1,14], the volume ratio those twin components can be roughly estimated from the ratio of integral intensities of Bragg reflexions and it is close to 4:5 for the considered case. Figure 4 shows Q-dependences of individual reflexes, positions of the maxima also correspond to the FCC structure, for example Q (2-20) exp = 0.02746 ± 10 -5 nm -1 and Q (2-20) cal = 0.027911 nm -1 , Q (11-1) exp = 0.01645 ± 10 -5 nm -1 and Q (2-20) cal = 0.017092 nm -1 , i.e.…”

Section: Resultsmentioning

confidence: 77%

“…The inverse PhC films were mounted on a goniometric head, which allows careful orientation of the sample. The 3D crystal structure is investigated by collecting the X-ray diffraction patterns for different rotation angles of the sample around its [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] axis in the range from -60 to + 60 [12].…”

Section: Methodsmentioning

confidence: 99%

Study of Inverse Ni-based Photonic Crystal using the Microradian X-ray Diffraction

Vasilieva

Grigoryeva

Мистонов

et al. 2010

J. Phys.: Conf. Ser.

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Inverse photonic nickel-based crystal films formed by electrocrystallization of metal inside the voids of polymer artificial opal have been studied using the microradian X-ray diffraction. Analysis of the diffraction images agrees with an face-centred cubic (FCC) structure with the lattice constant a 0 = 650 ± 10 nm and indicates two types of stacking sequences coexisting in the crystal (twins of ABCABC… and ACBACB… ordering motifs), the ratio between them being 4:5 The transverse structural correlation length L tran is 2.4 ± 0.1 m, which corresponds to a sample thickness of 6 layers. The in-plane structural correlation length L long is 3.4 ± 0.2 m, and the structure mosaic is of order of 10.

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Ultrasmall-angle X-ray scattering analysis of photonic crystal structure

Cited by 13 publications

References 28 publications

Microwave properties of Ni-based ferromagnetic inverse opals

Microwave properties of Ni-based ferromagnetic inverse opals

In situultra-small-angle X-ray scattering study under uniaxial stretching of colloidal crystals prepared by silica nanoparticles bearing hydrogen-bonding polymer grafts

Study of Inverse Ni-based Photonic Crystal using the Microradian X-ray Diffraction

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