PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 15244264

Solid state approach in biophoton research.

Francesco Musumeci·Giuseppe Privitera·Agata Scordino·Maurizio Tedesco·Antonio Triglia·Salvo Tudisco
View original source ↗Export metadata ↓

Abstract

Main characteristics of the delayed luminescence (DL) emitted in the seconds range from biological systems is analyzed. The correlation between change in DL and cell's organization, and similarity with some characteristics of DL from solid state system suggest to connect DL in biological system to decay of collective electron states, formed during energy and charge transport along the macromolecular ordered structures which form the cell. Results of a proposed soliton model are discussed, together with some phenomenological evidence which emphasize the possibility of using DL measurements as an intrinsic probe in biophysical investigations.

Explore related subjects

Luminescent MeasurementsPhotonsJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Francesco Musumeci, Giuseppe Privitera, Agata Scordino, Maurizio Tedesco, Antonio Triglia, Salvo Tudisco. 2003. Solid state approach in biophoton research.. https://pubmed.ncbi.nlm.nih.gov/15244264/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2006

Radiophotoluminescence dosimetry using a small spherical glass: a preliminary phantom study.

A radiophotoluminescence dosimetry has been proposed using a spherical silver-activated phosphate glass with a diameter of 1.5 mm. A 6 MV photon dose of 2 Sv (2 Gy) was delivered to 14 spherical glass samples placed between two solid water phantoms at a depth of 10 cm. The samples were positioned within a 20 x 20 mm(2) centred at beam axis to ensure uniform dose absorption. A normalised output from a read-out system was obtained by simultaneously measuring luminescence from a non-irradiated reference and that from an irradiated reference to eliminate background contamination and time-varying fluctuation of the readout system, leading to a normalised standard deviation of 1.8%. A dose up to 3.5 Sv (3.5 Gy) was delivered to three spherical glass samples positioned between two solid water phantoms at a depth of 10 cm. The normalised output increased linearly with the applied dose.

Luminescent Measurements↗
PubMed2005

Single carbon nanotubes probed by photoluminescence excitation spectroscopy: the role of phonon-assisted transitions.

We study light absorption mechanisms in semiconducting carbon nanotubes using low-temperature, single-nanotube photoluminescence excitation spectroscopy. In addition to purely electronic transitions, we observe several strong phonon-assisted bands due to excitation of one or more phonon modes together with the first electronic state. In contrast with a small width of emission lines (sub-meV to a few meV), most of the photoluminescence excitation features have significant linewidths of tens of meV. All of these observations indicate very strong electron-phonon coupling that allows efficient excitation of electronic states via phonon-assisted processes and leads to ultrafast intraband relaxation due to inelastic electron-phonon scattering.

Luminescent Measurements↗