[PDF]
http://dx.doi.org/10.3952/lithjphys.46306
Open access article / Atviros prieigos straipsnis
Lith. J. Phys. 46, 341–346 (2006)
ELLIPSOMETRIC CHARACTERIZATION
OF HYBRID SAMPLES COMPOSED OF IRON PORPHYRIN ON Si
G.J. Babonas, I. Šimkienė, A. Rėza, and J. Sabataitytė
Semiconductor Physics Institute, A. Goštauto 11, LT-01108
Vilnius, Lithuania
E-mail: jgb@pfi.lt
Received 31 January 2006
Hybrid organic–inorganic system
composed of iron porphyrin deposited on Si substrate was
investigated by spectroscopic ellipsometry. A series of samples
with (100) and (111)-oriented Si wafers and various acidity of
aqueous solution of iron porphyrin deposited on Si substrates were
fabricated and investigated. Experimental data were analysed in
various models in order to reveal the general regularities of the
hybrid system. It was determined that in hybrid samples, the
mesostructures of iron porphyrin formed from both acid and base
aqueous solutions possess similar electronic excitation bands. It
was proposed that a major part of iron oxo-dimers were destroyed
on the Si surface due to formation of the chemical bonds between
Si substrate covered by native oxide and iron porphyrin.
Keywords: optical properties of
composite materials, organic–inorganic hybrid nanostructures
PACS: 78.66.Sq, 81.07.Pr
HIBRIDINIŲ GELEŽIES PORFIRINO
ANT Si DARINIŲ ELIPSOMETRINIS APIBŪDINIMAS
G.J. Babonas, I. Šimkienė, A. Rėza, J. Sabataitytė
Puslaidininkių fizikos institutas, Vilnius, Lietuva
Spektroskopinės elipsometrijos metodu buvo
tiriama hibridinė organinė–neorganinė sistema, sudaryta iš
geležies porfirino, nusodinto ant Si padėklų. Buvo pagaminta ir
išnagrinėta serija bandinių ant Si (100) ir (111) plokštumomis
orientuotų padėklų su nusodintais ant jų įvairaus rūgštingumo
geležies porfirino vandens tirpalais. Siekiant išryškinti bendrus
hibridinės sistemos dėsningumus, eksperimentiniai duomenys buvo
analizuojami, panaudojant įvairius modelius. Nustatyta, kad
hibridiniuose dariniuose tiek iš rūgštinių, tiek iš šarminių
tirpalų susidaro geležies porfirino dariniai su panašiomis
elektroninių sužadinimų juostomis. Manoma, kad didžioji geležies
okso-dimerų dalis ant Si paviršiaus yra suardoma, formuojantis
cheminiams ryšiams tarp Si padėklo, padengto savuoju oksido
sluoksniu, ir geležies porfirino.
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