کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5363573 | 1388303 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simulation of SIMS for monomer and dimer of lignin under the assumption of thermal decomposition using QMD method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The thermal decomposition of the monomer and dimer of lignin has been simulated by a quantum molecular dynamics (DMD) method. In the calculation, we controlled the total energy of the system using Nóse-Hoover thermostats in the total energy range of 0.69-0.95Â eV, and the sampling position data with a time step of 0.5Â fs were carried out up to 3000 (1.5Â ps) or 5000 (2.5Â ps) steps in ab initio and semiempirical MO methods, respectively. We obtained the thermally decomposed fragments with positive, neutral and negative charges from SCF MO calculation at each data of the last MD step, and simulated the fragment distribution of the monomer and dimer lignins from the last step in 30-40 runs. Simulated mass numbers of positively and negatively charged fragments for lignin monomer and dimer showed considerably good accordance with the experimental results in TOF-SIMS observed by Saito and co-workers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 255, Issue 4, 15 December 2008, Pages 1040-1043
Journal: Applied Surface Science - Volume 255, Issue 4, 15 December 2008, Pages 1040-1043
نویسندگان
Kenichi Kato, Kazunaka Endo, Daisuke Matsumoto, Tomonori Ida, Kaori Saito, Kazuhiko Fukushima, Nobuhiko Kato,