Electric double layer dynamics by high-field electroluminescence in aqueous solution (Destriau effect)†
AUTOR(ES)
Schelly, Z. A.
RESUMO
Transient luminescence induced by high electric fields (>2.5 × 104 V/cm) was observed in aqueous solutions of 6,8-dihydroxypyrene-1,3-disulfonic acid. The light emission takes place both at the leading and the trailing edges of the perturbing electric square pulse. It occurs only during the variation of the applied field and disappears with a time constant of 0.5 μsec at constant field. In solid state phosphors, where this phenomenon has been reported previously, it is known as the Destriau effect. The mechanisms of excitation and emission can be explained by the electron injection model, in which the time constant of the luminescence decay is associated with the rate of formation of the space charge. This space charge appears as a separation of positive and negative charges into a double layer stabilized by the applied potential.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=392597Documentos Relacionados
- Paramagnetic shimming for high-field MRI
- ELECTRON MICROSCOPY WITH HIGH-FIELD SUPERCONDUCTING SOLENOID LENSES*
- Angular orientation of the stable tyrosyl radical within photosystem II by high-field 245-GHz electron paramagnetic resonance.
- Displacement of the tyrosyl radical cofactor in ribonucleotide reductase obtained by single-crystal high-field EPR and 1.4-Å x-ray data
- DC electric field effects on the electron dynamics in double rectangular quantum dots