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مقاله Synthesis and Characterization of LinearدرDendritic Macromolecules as the New Reducing Agent
تاريخ : 18 مهر 1395 | <-PostTime-> | نویسنده : ali | بازدید : <-PostHit->

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توجه : در صورت  مشاهده  بهم ريختگي احتمالي در متون زير ،دليل ان کپي کردن اين مطالب از داخل فایل ورد مي باشد و در فايل اصلي مقاله Synthesis and Characterization of LinearدرDendritic Macromolecules as the New Reducing Agents and Biocompatible Nanocarriers تحت pdf ،به هيچ وجه بهم ريختگي وجود ندارد


بخشی از متن مقاله Synthesis and Characterization of LinearدرDendritic Macromolecules as the New Reducing Agents and Biocompatible Nanocarriers تحت pdf :

سال انتشار: 1388

محل انتشار: سومین کنفرانس نانوساختارها

تعداد صفحات: 4

نویسنده(ها):

Ashkan Tavakoli Naeini – Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
Mohsen Adeli – Institute for Nanoscience and Nanotechnology, Sharif University of Technology Department of Chemistry, Faculty of Science, Lorestan University, Khoramabad
Manouchehr Vossoughi – bInstitute for Nanoscience and Nanotechnology, Sharif University of Technology

چکیده:

Poly (citric acid)- poly (ethylene glycol)-Poly (citric acid) (PCA-PEG-PCA) triblock copolymers(ABA- type) as biocompatible compounds were synthesized in three different molecular weights and applied as nanocarriers and reducing agents as well. Gold nanoparticles (AuNPs) were encapsulated within the above-synthesized linear-dendritic copolymers. Protected metal nanoparticles by PCA-PEG-PCA were stable in water for several months and agglomeration was not occurred. Characterizations of the macromolecules and nanoparticles were carried out using different spectroscopy methods. Diameter of the synthesized copolymers was investigated using transmission electronmicroscopy (TEM) and dynamic light scattering (DLS) experiments experiments and it was between 1.8 and 2.5 nm for the three different molecular weights. The size of AuNPs and also reducing ability and loading capacity of the linear–dendritic nanocarriers were investigated within a simultaneously reduction reaction of the HAuCl4 and encapsulation of AuNPs by using UV-visible spectroscopy and TEM It was found that the loading capacity of PCA-PEG-PCA macromolecules directly depends on the size of dendritic citric acid parts whereas there is an inverse relationship between the PCA PEG-PCA molecular weight and the size of synthesized AuNPs.


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