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Related Concept Videos

Network Covalent Solids02:18

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...

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Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes
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Carbon nanotubes - curse or blessing.

J-P Kaiser1, M Roesslein, T Buerki-Thurnherr

  • 1Empa Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Materials-Biology Interactions, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland.

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Carbon nanotubes (CNTs) show promise in various applications but their health effects are unclear due to differing properties. This review examines conflicting toxicity data and metrology issues in CNT research.

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Last Updated: Jun 2, 2026

Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes
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Published on: February 19, 2016

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Published on: May 13, 2013

Area of Science:

  • Nanotechnology
  • Materials Science
  • Toxicology

Background:

  • Carbon nanotubes (CNTs) are advanced nanomaterials with unique properties and widespread applications.
  • Despite their potential, the human health effects of CNTs remain unclear due to significant variations in their characteristics.
  • Existing literature presents contradictory findings regarding CNT toxicity.

Purpose of the Study:

  • To review and summarize existing literature on the toxic and non-toxic effects of CNTs.
  • To discuss the degradation of CNTs under specific conditions.
  • To explore the metrology and measurement science issues influencing CNT toxicity assays.

Main Methods:

  • Literature review of in-vitro and in-vivo studies on CNT toxicity.
  • Analysis of factors contributing to conflicting toxicity data.
  • Examination of metrology principles in the context of CNT toxicity testing.

Main Results:

  • Studies report both toxic and non-toxic effects of CNTs on cells, organs, and animals.
  • CNTs can be degraded under certain environmental conditions.
  • Discrepancies in CNT toxicity data are often linked to differences in material properties and measurement methodologies.
  • Despite toxicity concerns, research into medical applications of CNTs is ongoing.

Conclusions:

  • The diverse properties of CNTs necessitate careful consideration when interpreting toxicity data.
  • Metrology and standardized measurement frameworks are crucial for resolving conflicting results in CNT toxicity studies.
  • Further research is needed to reconcile toxicity findings with the development of safe and effective CNT-based applications, particularly in medicine.