Influence of L-Tryptophan on Growth and Optical Properties of PbS Nanocrystalline Thin Films
المؤلفون المشاركون
Palomino-Merino, R.
Rubio-Rosas, E.
Moreno-Rodríguez, Albino
Gutiérrez Pérez, R.
Trejo García, P.
Chaltel Lima, L.
Portillo Moreno, O.
Araiza García, M. E.
المصدر
العدد
المجلد 2018، العدد 2018 (31 ديسمبر/كانون الأول 2018)، ص ص. 1-15، 15ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2018-07-05
دولة النشر
مصر
عدد الصفحات
15
التخصصات الرئيسية
الملخص EN
The growth through the green chemical bath of PbS doped systematically with the biomolecule L-tryptophan led to growth of hybrid, inorganic-organic, nanocrystalline thin films onto glass slides at T~80°C.
The thickness was found in the range of 230–140 nm.
Morphological changes were analyzed using atomic force microscopy (AFM).
FTIR (Fourier-transform infrared spectroscopy) spectra showed broad absorption bands located at ~3450 cm−1 attributed to stretching of the H2O molecules and two small absorption bands located at ~2285 cm−1 and ~2918 cm−1 along with a strong band at ~1385 cm−1 assigned to vibration modes corresponding to CO32− ions.
In the patterns of X-ray diffraction (XRD), the cubic phase was identified in all the samples according to the angular positions 2θ~26.08°, 30.13°, 43.08°, 51.91°, 53.60°, 6251°, 68.98°, and 71.15°.
Using the Scherrer formula on the XRD patterns, the grain size (GS) was determined; for the undoped sample, ~42 nm was found, whereas for the doped samples, ~42–22 nm was found.
The electronic charge distribution of L-tryptophan was determined using the molecular electrostatic potential (MEP) to understand the decrease on the GS associated with the interaction of π electrons from conjugated rings and amino-acid functional groups.
The absorbance spectra in doped films showed excitonic peaks at ~1.8–2.1 eV associated to a higher energy of the 1Sh → 1Sh and 1Ph → 1Pe electronic transitions.
Through optical absorption, a shift for the band gap energy was observed from ~1.4 eV for the undoped sample and ~2.1–2.3 eV for the doped films, respectively.
Such behaviour is generally associated with the GS decrease and the effect of quantum confinement; a simple model by calculating changes in Gibbs free energy (ΔG°) for growth of nanocrystals is presented.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Palomino-Merino, R.& Gutiérrez Pérez, R.& Trejo García, P.& Chaltel Lima, L.& Portillo Moreno, O.& Araiza García, M. E.…[et al.]. 2018. Influence of L-Tryptophan on Growth and Optical Properties of PbS Nanocrystalline Thin Films. Journal of Nanomaterials،Vol. 2018, no. 2018, pp.1-15.
https://search.emarefa.net/detail/BIM-1194007
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Palomino-Merino, R.…[et al.]. Influence of L-Tryptophan on Growth and Optical Properties of PbS Nanocrystalline Thin Films. Journal of Nanomaterials No. 2018 (2018), pp.1-15.
https://search.emarefa.net/detail/BIM-1194007
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Palomino-Merino, R.& Gutiérrez Pérez, R.& Trejo García, P.& Chaltel Lima, L.& Portillo Moreno, O.& Araiza García, M. E.…[et al.]. Influence of L-Tryptophan on Growth and Optical Properties of PbS Nanocrystalline Thin Films. Journal of Nanomaterials. 2018. Vol. 2018, no. 2018, pp.1-15.
https://search.emarefa.net/detail/BIM-1194007
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1194007
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر