| Autor: |
M Yu, Losytskyy, L O, Vretik, N V, Kutsevol, O A, Nikolaeva, V M, Yashchuk |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Nanoscale Research Letters |
| ISSN: |
1931-7573 |
| Popis: |
Polystyrene (PS)-diphenyloxazole (PPO) nanoparticles with attached cross-linked poly-N-isopropylacrylamide (PNIPAM) chains were obtained resulting in PS-PPO-PNIPAM hybrid nanosystems (NS). Fluorescence spectra of chlorin e6 added to PS-PPO-PNIPAM hybrid NS revealed electronic excitation energy transfer (EEET) from PS matrix and encapsulated PPO to chlorin e6. EEET efficiency increased strongly during 1 h after chlorin e6 addition, indicating that uptake of chlorin e6 by PNIPAM part of hybrid NS still proceeds during this time. Heating of PS-PPO-PNIPAM-chlorin e6 NS from 21 to 39 °C results in an enhancement of EEET efficiency; this is consistent with PNIPAM conformation transition that reduces the distance between PS-PPO donors and chlorin e6 acceptors. Meanwhile, a relatively small part of chlorin e6 present in the solution is bound by PNIPAM; thus, further studies in this direction are necessary. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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