Nanoscale conformational ordering in polyanilines investigated by SAXS and AFM

Leite, Fábio L.; Neto, Mário de Oliveira; Paterno, Leonardo G.; Ballestero, Michel R.M.; Polikarpov, Igor; Mascarenhas, Yvonne P.; Herrmann, P. S. de P.; Mattoso, Luiz H. C.; Oliveira, Osvaldo N.

doi:10.1016/j.jcis.2007.08.069

Cited by 27 publications

(18 citation statements)

References 67 publications

(70 reference statements)

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“…Powder samples were placed in a parallel window cell and the scattering curves were normalized with respect to the decreasing intensity of the incoming synchrotron beam and to the sample absorption [25]. Two values of the distance between sample and detector were used: 394.2 mm (Small-angle X-ray Diffraction -SAXD) and 1010.6 mm (Small-angle X-ray Scattering -SAXS), the first to record Bragg reflections and the last to record the scattering due to the scattering particles.…”

Section: Saxs Measurementsmentioning

confidence: 99%

Nanostructured Polyaniline Emeraldine-base form (EB-PANI): a structural investigation for different neutralization times

Sanches

Silva

Ferreira

et al. 2014

Journal of Molecular Structure

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Section: Saxs Measurementsmentioning

confidence: 99%

Nanostructured Polyaniline Emeraldine-base form (EB-PANI): a structural investigation for different neutralization times

Sanches

Silva

Ferreira

et al. 2014

Journal of Molecular Structure

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“…The presence of aggregates on the surface was a common characteristic irrespective of the type of substrate and deposition. The size of the particles were determined from the AFM images, after correcting for the effect due to the similar sizes of the tip and particles using the geometric relation described in the literature 18,19 .…”

Section: Atomic Force Microscopy (Afm)mentioning

confidence: 99%

XRD, AFM, IR and TGA study of nanostructured hydroxyapatite

et al. 2012

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In this work, the synthetic hydroxyapatite (HAP) was studied using different preparation routes to decrease the crystal size and to study the temperature effect on the HAP nano-sized hydroxyapatite crystallization. X-ray diffraction (XRD) analysis indicated that all samples were composed by crystalline and amorphous phases . The sample with greater quantity of amorphous phase (40% of total mass) was studied. The nano-sized hydroxyapatite powder was heated and studied at 300, 500, 700, 900 and 1150 °C. All samples were characterized by XRD and their XRD patterns refined using the Rietveld method. The crystallites presented an anisotropic form, being larger in the [001] direction. It was observed that the crystallite size increased continuously with the heating temperature and the eccentricity of the ellipsoidal shape changed from 2.75 at 300 °C to 1.94, 1.43, 1.04 and 1.00 respectively at 500, 700, 900 and 1150 °C. In order to better characterize the morphology of the HAP the samples were also examined using atomic force microscopy (AFM), infrared spectrometry (IR) and thermogravimetric analysis (TGA).

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“…This methodology was also applied to other nuclear receptors and protein systems (Fischer et al, (2003), Garcia et al (2006), Grimm et al (2006), Calgaro et al (2007), Nascimento et al (2007), Mario Oliveira Neto et al (2008), in an addition to polymers in solutions (Leite et al (2007)). For the latter, the initial part of the curve, probably due to larger particles, had to be disregarded, thus considering the polymer system as approximately monodisperse.…”

Section: Results Of Simulated Annealing In Two Electron Density Solutmentioning

confidence: 99%