کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5373541 1504223 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Insights into formation kinetics of gold nanoparticles using the classical JMAK model
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Insights into formation kinetics of gold nanoparticles using the classical JMAK model
چکیده انگلیسی


- Formation kinetics of gold nanoparticles (GNPs) was well fitted by the classical JMAK model.
- Formation kinetics between different GNPs synthetic routes, GNPs with different shapes were compared.
- Crystallization kinetics information conceived in JMAK model was revealed.

Formation of gold nanoparticles (GNPs) is a physicochemical process with two paralleling aspects, i.e., the redox process and the crystallization. Herein the classical JMAK model which was originally developed for phase transformation process was applied for formation kinetics of GNPs prepared through both chemical and biogenic approaches; the relationship between JMAK model parameters, the crystallization behaviors and the dimensionality of the GNPs were clarified. It reveals that the rate parameter k mainly depends on the nucleation rate, and the Avrami exponent n could reflect the nucleation mechanism and characterize the geometric dimension of GNPs. Also, the crystallization is the rate-determining process that controls the dynamic regime of GNPs formation. Mechanistic differences between the chemical and bio synthetic routes, as well as those between spherical and flaky GNPs are also clarified via interpretation of the JMAK model parameters.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 441, 30 September 2014, Pages 23-29
نویسندگان
, , , , , ,