Materials Map

Discover the materials research landscape. Find experts, partners, networks.

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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Materials Map under construction

The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (1/1 displayed)

  • 2018The pH influence on the intercalation of the bioactive agent ciprofloxacin in fluorohectorite22citations

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Chart of shared publication
Michels, L.
1 / 3 shared
Santos, E. C. Dos
1 / 1 shared
Juranyi, F.
1 / 2 shared
Bordallo, Heloisa N.
1 / 24 shared
Silva, G. J. Da
1 / 1 shared
Fossum, J. O.
1 / 2 shared
Mikkelsen, A.
1 / 12 shared
Chart of publication period
2018

Co-Authors (by relevance)

  • Michels, L.
  • Santos, E. C. Dos
  • Juranyi, F.
  • Bordallo, Heloisa N.
  • Silva, G. J. Da
  • Fossum, J. O.
  • Mikkelsen, A.
OrganizationsLocationPeople

article

The pH influence on the intercalation of the bioactive agent ciprofloxacin in fluorohectorite

  • Gates, W. P.
  • Michels, L.
  • Santos, E. C. Dos
  • Juranyi, F.
  • Bordallo, Heloisa N.
  • Silva, G. J. Da
  • Fossum, J. O.
  • Mikkelsen, A.
Abstract

<p>Biocompatible encapsulated drug delivery materials are highly desired as they provide for controlled release of bioactive agents, thereby improving the effectiveness of medical treatments. Some of the key properties of better materials for drug delivery include high adsorptive capacity, which can be realized by smectites, a family of clay minerals. Here the influence of pH on encapsulation of the bioactive molecule ciprofloxacin (CIPRO), an antibiotic, by fluorohectorite (FHt), a synthetic smectite, was investigated. Aspects of the clay structure itself were also investigated. By means of X-ray powder diffraction (XRD), thermogravimetric analysis coupled to Fourier transform infrared spectroscopy (TGA/FTIR) and inelastic neutron scattering (INS), it is demonstrated that the capture of ciprofloxacin is more efficient at acidic pH. Geometric considerations based on the XRD results and mass calculations based on the TGA results provided evidence that at acidic pH, the CIPRO-FHt complex contained one CIPRO molecule per unit cell, while at neutral pH the CIPRO content was about half, despite having similar interlayer volume available. Finally it is shown that adsorption of CIPRO by FHt facilitated removal of residual water from the interlayer, providing additional evidence that intercalation is the main adsorptive mechanism at acidic pH. These results lead to a deeper understanding concerning the capture of amphoteric drug molecules by smectites, as well as concerning their molecular interactions, which may lead to more feasible application of clay minerals as a carrier for drug molecules.</p>

Topics
  • impedance spectroscopy
  • mineral
  • x-ray diffraction
  • thermogravimetry
  • Fourier transform infrared spectroscopy
  • Inelastic neutron scattering