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Stability of Photoinduced Orientation of Poly (methyl methacrylate)/ Solvent Red 23Thin Films

استقرارية التوجيه المحثوث ضوئياً في الأفلام الرقيقة لبولي ميثيل ميثاكريليت/سولفنت رد 23

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 Publication date 2014
  fields Physics
and research's language is العربية
 Created by Shamra Editor




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The effect of the reversible photo-orientation of the Solvent Red 23 dye incorporated in Poly (methyl methacrylate) thin films has been investigated. A probe-pump optical system was used to investigate the dichroic behavior of the samples. Orthogonal polarized laser light induces a smaller increase in the transmitted beam intensity. A stronger polar order was induced using a parallel pump-probe laser light compared to that of the perpendicular state. It was found that the dichroic ratio value of the Poly (methyl methacrylate) / Solvent Red 23 thin film is 4.952, which indicates that the net orientation of Solvent Red 23 molecules is orthogonal to the applied beam field. The dynamic evolution of the dichroic ratio showed that the relaxation is rather slow, and it deteriorates in a slow logarithmic fashion, which may take a very long time in order to reach the isotropic state.


Artificial intelligence review:
Research summary
تستكشف هذه الدراسة تأثير التوجيه المحثوث ضوئياً لصباغ سولفنت رد 23 المدمج في أفلام رقيقة من بولي ميثيل ميثاكريليت. تم استخدام نظام بصري لضخ-سبر لدراسة السلوك اللوناني للعينات. وجد أن الضوء الليزري المستقطب بشكل متوازي يولد بنية قطبية أقوى مقارنة بالضوء المتعامد. كانت نسبة اللونانية للأفلام 4.952، مما يشير إلى أن التوجيه الصافي لجزيئات الصباغ يكون معامداً لاتجاه حقل حزمة الضوء. أظهرت الدراسة أن الاسترخاء بطيء ويتدهور بشكل لوغاريتمي بطيء، مما قد يستغرق وقتاً طويلاً للوصول إلى الحالة المتناحية. تم إعداد الأفلام الرقيقة عند درجة حرارة الغرفة وتم قياس سمكها باستخدام تقنية اقتران المنشور. أظهرت النتائج أن الامتصاص يتناقص بسرعة عند تشغيل شعاع الضخ ويصل إلى حالة التشبع، ثم يزداد بشكل كبير عند إيقاف الشعاع. تم حساب نسبة اللونانية باستخدام الامتصاص عند الاستقطاب المتوازي والمتعامد، وأظهرت النتائج أن نسبة اللونانية كانت ثابتة بشكل كبير حتى بعد إيقاف شعاع الضخ.
Critical review
دراسة نقدية: تقدم هذه الدراسة فهماً عميقاً لتأثير التوجيه المحثوث ضوئياً في الأفلام الرقيقة لبولي ميثيل ميثاكريليت/سولفنت رد 23. ومع ذلك، هناك بعض النقاط التي يمكن تحسينها. أولاً، لم يتم التطرق بشكل كافٍ إلى تأثير العوامل البيئية مثل درجة الحرارة والرطوبة على استقرار التوجيه المحثوث ضوئياً. ثانياً، كان من الممكن توسيع نطاق الدراسة ليشمل أنواعاً أخرى من الأصباغ أو البوليمرات لمقارنة النتائج. أخيراً، كان من المفيد تضمين المزيد من البيانات التجريبية لدعم النتائج المستخلصة بشكل أقوى.
Questions related to the research
  1. ما هي نسبة اللونانية للأفلام الرقيقة لبولي ميثيل ميثاكريليت/سولفنت رد 23؟

    نسبة اللونانية للأفلام الرقيقة لبولي ميثيل ميثاكريليت/سولفنت رد 23 هي 4.952.

  2. كيف يؤثر الضوء الليزري المستقطب بشكل متوازي على التوجيه المحثوث ضوئياً مقارنة بالضوء المتعامد؟

    الضوء الليزري المستقطب بشكل متوازي يولد بنية قطبية أقوى مقارنة بالضوء المتعامد.

  3. ما هي التقنية المستخدمة لقياس سمك الأفلام الرقيقة؟

    تم قياس سمك الأفلام الرقيقة باستخدام تقنية اقتران المنشور.

  4. كيف يتغير الامتصاص عند تشغيل وإيقاف شعاع الضخ؟

    الامتصاص يتناقص بسرعة عند تشغيل شعاع الضخ ويصل إلى حالة التشبع، ثم يزداد بشكل كبير عند إيقاف الشعاع.


References used
Zhao, Y. and Ikeda, T.2009. Smart light-responsive materials: Azobenzenecontaining polymers and liquid crystals (Wiley, New Jersey, USA) p. 514
Ahmad, F. Jamil, M., JaeJeon, Y. Jin Woo, L. Eun Jung, J. and Eun Jang, J. 2012. Investigation of nonionic diazo dye-doped polymer dispersed liquid crystal film, Bull. Mater. Sci., V. 35, No. 2, pp. 221–231
Cojocariu, C. and Rochon, P. 2004. Light-induced motions in azobenzene containing polymers, Pure Appl. Chem., V. 76, No. 7–8, pp. 1479–1497
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