The biocomposite tube of a chaetopterid marine worm constructed with highly-controlled orientation of nanofilaments.

The ultrastructure of the self-constructed tube housing of the bioluminescent marine worm, Chaetopterus sp. reveals that the bio-nanocomposite tube comprises of multiple non-woven plies of multi-axially oriented organic nanofilaments (ø 50-1100nm) cemented together by an unstructured organic matrix binder. The thin-walled, impermeable tubes are bio-inspirational for conventional pipe technology.

Housing tubes from the marine worm Chaetopterus sp.: biomaterials with exceptionally broad thermomechanical properties.

The housing tube material of the marine worm Chaetopterus sp. exhibits thermal stability up to 250°C, similar to other biological materials such as mulberry silkworm cocoons. Interestingly, however, dynamic mechanical thermal analysis conducted in both air and water elucidated the lack of a glass transition in the organic tube wall material.

Infrared spectroscopic determination of the degree of charge transfer in complexes of TCNE with methyl-substituted benzenes.

The position of the CN stretching frequency in infrared spectra of tetracyanoethylene (TCNE) complexed with methyl-substituted benzenes is used to determine the fraction of charge transferred from the electron donor to the acceptor.