Photocurrent generation of a porphyrin self-assembly monolayer on a gold film electrode by surface plasmon excitation using near-infrared light
2000; Elsevier BV; Volume: 322; Issue: 3-4 Linguagem: Inglês
10.1016/s0009-2614(00)00393-6
ISSN1873-4448
Autores Tópico(s)Photoreceptor and optogenetics research
ResumoPhotocurrent was generated by irradiation of a porphyrin self-assembly monolayer on a gold film electrode with near-infrared (IR) as well as visible light under the surface plasmon (SP) resonance conditions. The action spectrum by the SP excitation demonstrated existence of discrete active bands in the near-IR region together with the Soret and Q-bands. These bands may be attributable to the absorption of the aggregates and the singlet–triplet transition of the porphyrin. The strongly enhanced electromagnetic field of SP in the near-IR is considered to undergo excitation of very weak discrete absorption bands which cannot be observed by the conventional absorption measurement.
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