کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10264814 | 458028 | 2013 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Combined particle mass spectrometer - Quartz crystal microbalance apparatus for in situ nanoparticle monitoring during flame assisted synthesis
ترجمه فارسی عنوان
طیف سنج جرمی ترکیبی - دستگاه نانو ذرات کریستال کوارتز برای نظارت نانوذرات در محل در سنتز کمک شونده
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کلمات کلیدی
نانوذرات، شعله، توزیع توده ذره، غلظت توده، طیف سنج جرمی ذرات، میکروبازار کریستال کوارتز،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
A newly developed apparatus for simultaneous in situ monitoring of size, mass and number concentration of a flame synthesised particle aerosol is presented. The diagnostics methodology is relying on combination of particle mass spectrometry and quartz crystal microbalance techniques. The analysis protocol includes molecular beam sampling, sorting the charged particles constituent according to mass/charge ratio (m/ze) via electrostatic deflection, and detection of the neutral particles by monitoring the variation of the quartz crystal oscillation frequency upon exposure to the particle - laden molecular beam. From these measurements, the total mass concentration and probability density distribution of m/ze could be directly determined, allowing to deduce the particle number concentration in the aerosol, at least in relative units. The feasibility of the method was demonstrated on the example of iron oxide nanoparticles (NPs) forming in CH4/O2/N2 dual stage flame doped with iron pentacarbonyl, Fe (CO)5 as a precursor of iron oxide NPs. Sensitivities of 6Â ÃÂ 104Â NP/s and 8Â ÃÂ 106Â NP/s were achieved for charged and neutral particles, respectively. Possible implications of the obtained results on the elucidation of iron oxide NP formation mechanism are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Combustion and Flame - Volume 160, Issue 10, October 2013, Pages 2131-2140
Journal: Combustion and Flame - Volume 160, Issue 10, October 2013, Pages 2131-2140
نویسندگان
Alexey Fomin, Marina Poliak, Igor Rahinov, Vladimir Tsionsky, Sergey Cheskis,