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| 003 | EG-GiCUC | ||
| 005 | 20250223032911.0 | ||
| 008 | 220111s2021 ua dh f m 000 0 eng d | ||
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_aEG-GiCUC _beng _cEG-GiCUC |
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| 041 | 0 | _aeng | |
| 049 | _aDeposite | ||
| 097 | _aM.Sc | ||
| 099 | _aCai01.24.05.M.Sc.2021.Om.P | ||
| 100 | 0 | _aOmnia Mohamed Mokhtar Ahmed | |
| 245 | 1 | 0 |
_aPhotochromic performance and photostability of strontium aluminate as anti-counterfeiting / _cOmnia Mohamed Mokhtar Ahmed ; Supervised Yasser Attia Attia , Tawfik Abdelhamid Tawfik Mohamed Khattab |
| 246 | 1 | 5 | _aالأداء الفوتوكرومى والثبات الضوئى لألومينات السترونشيوم كطلاء مضاد للتزوير لتأمين المستندات |
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_aCairo : _bOmnia Mohamed Mokhtar Ahmed , _c2021 |
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_a114 P. : _bcharts , facsimiles ; _c25cm |
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| 502 | _aThesis (M.Sc.) - Cairo University - National Institute of Laser Enhanced Sciences (NILES) - Department of Laser Application in Enviromental Metrology, Photochemistry and Photobiology | ||
| 520 | _aFabrication of photochromic inks are gaining much research interest as they have many diverse applications such as photovoltaic, bio-medical, and anti-counterfeiting. New photochromic film was developed for the preparation of anti-counterfeiting documents utilizing inorganic/organic nanocomposite enclosing a photoluminescent inorganic pigment and a polyacrylic binder polymer.The produced nanocomposite exhibited a fluorescent color change with an optimum excitation wavelength at 358 nm.To generate a translucent film from pigment/polyacrylic nanocomposite, the phosphorescent strontium aluminium oxide pigment should be well-dispersed in the solution of the polyacrylic-based binder without agglomeration.The photochromic nanocomposite was applied efficiently onto commercial cellulose paper documents utilizing the effective and economical spray-coating technology followed with thermofixation. A homogeneous photochromic film was immobilized onto cellulose paper surface to introduce a transparent film changing to greenish-yellow upon exposure to ultraviolet light as depicted by CIE coloration measurements.The photochromic effect was monitored at lowest pigment concentration (0.25 wt%). The spray-coated paper documents exhibited two absorption bands at 256 and 358 nm as well as two fluorescence peaks at 433 and 511 nm | ||
| 530 | _aIssued also as CD | ||
| 653 | 4 | _aAnti-counterfeiting | |
| 653 | 4 | _aLuminescent | |
| 653 | 4 | _aOfficial documents | |
| 700 | 0 |
_aTawfik Abdelhamid Tawfik Mohamed Khattab , _eSupervisor |
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| 700 | 0 |
_aYasser Attia Attia , _eSupervisor |
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| 856 | _uhttp://172.23.153.220/th.pdf | ||
| 905 |
_aNazla _eRevisor |
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| 905 |
_aShimaa _eCataloger |
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_2ddc _cTH |
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_c83936 _d83936 |
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