کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1787970 | 1023457 | 2006 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Possibility of a femtogram mass biosensor using a self-sensing cantilever
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
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چکیده انگلیسی
The possibility of realizing femtogram mass detection using a piezoresistive microcantilever has been studied for bioscience applications. The mass detection was undertaken by employing the resonance frequency shift of a cantilever. In the experiments, we measured the change in the mass of adsorbed water molecules and the reaction between an antigen and an antibody on the cantilever from the resonance frequency shift. We used a prototype and a commercially available piezoresistive cantilever. The sensor was formed by using Wheatstone bridge circuits, a positive feedback controller, a piezoactuator and a phase-locked loop (PLL) demodulator. A mass sensitivity of around 200Â fg/Hz and a noise level of about 12Â fg were estimated experimentally from the water molecules adsorbed on the cantilever. We also confirmed that the sensor could detect an antigen and antibody reaction in an egg allergy test.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 6, Issue 3, June 2006, Pages 384-388
Journal: Current Applied Physics - Volume 6, Issue 3, June 2006, Pages 384-388
نویسندگان
Sumio Hosaka, Takafumi Chiyoma, Ayumi Ikeuchi, Haruki Okano, Hayato Sone, Takashi Izumi,