可拋棄式尿素感測器與前置放大器之研究

Study of the Disposable Urea Sensor and the Pre-amplifier

陳佳琪(Jia-Chyi Chen)

指導教授 ： 熊慎幹

中原大學/工學院/電子工程研究所/碩士(2002年)

https://doi.org/10.6840/cycu200200059

摘要

血液中之尿素濃度，可以反應蛋白質攝取及異化作用，同時與腎臟、肝臟功能及腎上腺內分泌機能有密切之關聯，所以血液或尿液中尿素氮之濃度係人體健康之重要指標，於臨床診斷用以判斷腎功能之重要參數。
本論文係利用分離架構之延伸式SnO2/ITO glass離子感測場效電晶體製作可拋棄式尿素測器，探討各個參數對整體反應之影響，如固定不同之酵素活性、改變水膠之濃度、改變量測環境之起始pH值、改變緩衝溶液之濃度…等。經由一系列之實驗，即可得知此架構之尿素感測器於5mM PBS pH 6.0之工作環境下有最佳反應曲線，可偵測尿素濃度0.31mg/dl～80mg/dl之範圍，線性部分之感測度為169.1mV/pUrea。
另一方面，吾人利用UMC 0.5um之CMOS標準製程設計製作一1.5V低電壓運算放大器，並對此運算放大器進行其電特性之模擬與量測，另外同時將感測器一同製作於單一晶片上，並與分離式架構比較其對pH感測與尿素感測之特性影響。

關鍵字

尿素感測器 ； 延伸式離子感測場效電晶體 ； 二氧化錫 ； 尿素酶 ； 低電壓運算放大器

並列摘要

In blood the urea concentration can response the unusual absorption of the protein. At the same time, it is also related to the renal function. Therefore, the urea in the blood or urine is the index of the health and the important parameter of the clinical diagnosis.
In this study, the extended-gate Field effect transistor of the SnO2/ITO glass was applied to fabricate the disposable urea sensor and to confer with the influence, including the activity of the enzyme, the concentration of the gel, the pH value, the concentration of the phosphate buffer solution…etc. After a series of the experiments, the optimize measurement environment and the best response curves can be realized. The urea sensor of the extended-gate structure can detect the urea concentration from 0.31mg/dl to 80mg/dl, and sensitivity of the linear range is about 169.1mV/pUrea.
However, the CMOS standard process of the UMC 0.5um was employed to fabricate the 1.5V low-voltage amplifier. And the characteristic of the amplifier also be measured in this study. Besides, the sensor and the pre-amplifier were also be fabricated by this technique. In this study, two kinds of the structures will be compared, including the separative structure and on a single chip.

並列關鍵字

urease ； extended-gate field effect transistor ； tin oxide ； urea sensor ； low-voltage amplifier

參考文獻

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