کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1243384 | 969659 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
New cut angle quartz crystal microbalance with low frequency-temperature coefficients in an aqueous phase
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: New cut angle quartz crystal microbalance with low frequency-temperature coefficients in an aqueous phase New cut angle quartz crystal microbalance with low frequency-temperature coefficients in an aqueous phase](/preview/png/1243384.png)
چکیده انگلیسی
In a traditional quartz crystal microbalance (QCM), an AT-cut (cut angle Ï = 35.25° in yxl orientation) quartz wafer is employed because it has low frequency-temperature coefficients (dF/dT) at room temperature region. But when a QCM is in contact with a liquid phase, its frequency is also related to the properties of the liquid, which are temperature dependent. The value of dF/dT is about 20 Hz/°C for a 9 MHz AT-cut QCM with one side facing water. In this work, a group of QCMs in new cut angles were prepared. The influence of the cut angle on the frequency-temperature characteristic, response sensitivities to surface mass loading and viscodensity of liquid were investigated. An intrinsically temperature-compensated QCM sensor that possesses low dF/dT values in aqueous solution was reported. When a 9 MHz QCM with Ï = 35.65° was contacted with water with one side, its dF/dT value is close to zero at ca. 25 °C and its averaged value of |dF/dT| is only 0.6 Hz/°C in the temperature range of 23-27 °C. The frequency responses to surface mass loading and viscodensity of liquid phase are very close among the QCMs with the cut angles in the range of 35.15-35.7°. The intrinsically temperature-compensated QCM was applied to investigate the alternate adsorption processes of cationic polyelectrolyte and silica nanoparticle.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 76, Issue 4, 15 August 2008, Pages 803-808
Journal: Talanta - Volume 76, Issue 4, 15 August 2008, Pages 803-808
نویسندگان
Dazhong Shen, Qi Kang, Yu-E Wang, Qiang Hu, Junguo Du,