Preparation of nano and microcrystals of silver using titania xerogel matrix as template

Viana, Marcelo Machado; Paula, Carolin; Miquita, Douglas R.; Mohallem, Nelcy Della Santina

doi:10.1007/s10971-011-2455-2

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…The image of a profile (Figure 3b) was traced in the topography, which shows a small variation (of the order of 1 nm) in the surface topography of the DGEBA epoxy resin. Figure 4 shows the formation of layers of three-dimensional spherical clusters, after metallization, corresponding to silver nanoparticles in the sense of their plasmonic behavior; this result is consistent with the literature for other polymers [2][3][4][5]8,13,14,23] . The images show little definition of cluster size for layers less than 5 nm, possibly due to the mobility of silver atoms on the surface of the polymer.…”

Section: Spectroscopic Analysissupporting

confidence: 88%

“…Besides the use of metals in the form of thin films, the use of silver has also been introduced in various materials acting as a biocide agent, such as appliances with silver films, tissues, bandages soaked in silver for burns etc [9][10][11] . All of these products use composite materials in which the silver is embedded in a polymer matrix [7,8,[12][13][14][15] . The technology used to conduct this type of dispersion is based on methods established by the chemical industry in most cases.…”

Section: Introductionmentioning

confidence: 99%

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AFM and XRD characterization of silver nanoparticles films deposited on the surface of DGEBA epoxy resin by ion sputtering

et al. 2013

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Abstract:In this work, silver atoms were deposited by ion sputtering on the surface of diglycidyl ether of bisphenol A (DGEBA) epoxy resin cured at 150 °C for 6 hours in air. The films of DGEBA and its precursors were characterized by Raman spectroscopy to identify the main functional groups and their relationship with the deposited silver atoms. Silver thin films of 5, 10, 15 and 20 nm were deposited on the epoxy resin at room temperature. Both the initial film of DGEBA and the subsequent silver thin film were analyzed by Atomic Force Microscopy (AFM) in the non-contact mode. Silver thin films were also analyzed using X-ray diffraction (XRD) at room temperature. The AFM results showed the formation of silver crystallites on the surface of DGEBA at very low coverage whereas XRD indicated that most of them had their main axis aligned to the normal of the surface. An increase in the coverage led to an increase in the grain size as indicated by AFM. However, XRD results indicated that the crystallite size remained almost constant while the appearance of peaks corresponding to other crystalline orientations suggests the coalescence of the original crystallites and an increase in size of the more dense planes, namely [111].

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