Development of a mass sensitive quartz crystal microbalance (QCM)-based DNA biosensor using a 50 MHz electronic oscillator circuit.

Development of a mass sensitive quartz crystal microbalance (QCM)-based DNA biosensor using a 50 MHz electronic oscillator circuit.
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DOI:
10.3390/s110807656
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发表时间:
2011
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Vives AA
Vives AA
中科院分区:
其他
文献类型:
--
作者:
García-Martinez G;Bustabad EA;Perrot H;Gabrielli C;Bucur B;Lazerges M;Rose D;Rodriguez-Pardo L;Fariña J;Compère C;Vives AA

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本文设计了一种采用50 MHz石英晶体微平衡(QCM)电子振荡器电路的高灵敏度DNA序列检测器。振荡器电路基于米勒拓扑,能够在阻尼介质中工作。进行了频率噪声的标定和实验研究,发现所设计的传感器在动态条件下(有液体循环)的分辨率为7.1 ng/cm2。验证了该振荡器作为DNA生物传感器的可行性。结果表明,该系统能够以高选择性和灵敏度检测溶液中互补目标dna的存在。可以检测到50 ng/mL以上的DNA靶浓度。
This work deals with the design of a high sensitivity DNA sequence detector using a 50 MHz quartz crystal microbalance (QCM) electronic oscillator circuit. The oscillator circuitry is based on Miller topology, which is able to work in damping media. Calibration and experimental study of frequency noise are carried out, finding that the designed sensor has a resolution of 7.1 ng/cm2 in dynamic conditions (with circulation of liquid). Then the oscillator is proved as DNA biosensor. Results show that the system is able to detect the presence of complementary target DNAs in a solution with high selectivity and sensitivity. DNA target concentrations higher of 50 ng/mL can be detected.
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