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)

  • 2020Size-Tunable Nanoneedle Arrays for Influencing Stem Cell Morphology, Gene Expression, and Nuclear Membrane Curvature73citations

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Chart of shared publication
Armstrong, James
1 / 3 shared
Higgins, Stuart
1 / 1 shared
Seong, Hyejeong
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Penders, Jelle
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Stevens, Molly
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Becce, Michele
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Crowder, Spencer
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Sero, Julia
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Chart of publication period
2020

Co-Authors (by relevance)

  • Armstrong, James
  • Higgins, Stuart
  • Seong, Hyejeong
  • Penders, Jelle
  • Stevens, Molly
  • Becce, Michele
  • Crowder, Spencer
  • Sero, Julia
OrganizationsLocationPeople

article

Size-Tunable Nanoneedle Arrays for Influencing Stem Cell Morphology, Gene Expression, and Nuclear Membrane Curvature

  • Armstrong, James
  • Higgins, Stuart
  • Seong, Hyejeong
  • Penders, Jelle
  • Stevens, Molly
  • Becce, Michele
  • Moore, Axel
  • Crowder, Spencer
  • Sero, Julia
Abstract

High-aspect-ratio nanostructures have emerged as versatile platforms for intracellular sensing and biomolecule delivery. Here, we present a microfabrication approach in which a combination of reactive ion etching protocols were used to produce high-aspect-ratio, nondegradable silicon nanoneedle arrays with tip diameters that could be finely tuned between 20 and 700 nm. We used these arrays to guide the long-term culture of human mesenchymal stem cells (hMSCs). Notably, we used changes in the nanoneedle tip diameter to control the morphology, nuclear size, and F-actin alignment of interfaced hMSCs and to regulate the expression of nuclear lamina genes, Yes-associated protein (YAP) target genes, and focal adhesion genes. These topography-driven changes were attributed to signaling by Rho-family GTPase pathways, differences in the effective stiffness of the nanoneedle arrays, and the degree of nuclear membrane impingement, with the latter clearly visualized using focused ion beam scanning electron microscopy (FIB-SEM). Our approach to design high-aspect-ratio nanostructures will be broadly applicable to design biomaterials and biomedical devices used for long-term cell stimulation and monitoring.

Topics
  • morphology
  • scanning electron microscopy
  • focused ion beam
  • Silicon
  • biomaterials
  • plasma etching