Institute of Fundamental Technological Research
Polish Academy of Sciences

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Khene Samson


Recent publications
1.  Nwaji N., David O. O., John M., Marcel L., Samson K., Jonathan B., Tebello N., Improved nonlinear optical behaviour of ball type indium (III) phthalocyanine linked to glutathione capped nanoparticles, Dyes and Pigments, ISSN: 1873-3743, DOI: 10.1016/j.dyepig.2017.01.066, Vol.140, pp.417-430, 2017

Abstract:
The synthesis of ball–type indium phthalocyanine (complex 4) and its covalent attachment to glutathione (GSH–) capped (Ag, Au, CdTeSe, CdTeSe/ZnO) nanoparticles are reported in this work. Furthermore, their photophysical and nonlinear optical behaviour were investigated. We observed a decrease in the fluorescence quantum yield with corresponding increase in the triplet quantum yield of the nanoconjugates in comparison to complex 4 alone. The reverse saturable absorption was found to be dependent on excited state absorption. The optical limiting threshold ranges from 0.40–0.78 (J/cm2). The nanoconjugate of the complex 4 with GSH–CdTeSe/ZnO (QD1) accounted for the most improved triplet state parameters and nonlinear optical behaviour in comparison to complex 4 and the other nanoconjugates studied in this work.

Affiliations:
Nwaji N. - IPPT PAN
David O. O. - other affiliation
John M. - other affiliation
Marcel L. - other affiliation
Samson K. - other affiliation
Jonathan B. - other affiliation
Tebello N. - other affiliation

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