電解質溶液的離子在微電泳槽之運動

離子在溶液中的運動行為，自古以來不管在化學界或是生物界，都是人們想要了解的課題，我們利用外加電場驅使離子運動，然而在直流電場持續供應之下，可能會使得電荷累積在電極附近，意味著量測環境將隨之同時變化。因此，不同於傳統，我們將直流電場更動為交流電場，以避免電荷持續累積之問題，希冀可使量測環境不隨時間而改變。根據外加電場所測得到的離子電流，我們推導了一個模型來解釋離子在交流電場下的運動行為，並且將理論值與實驗結果做一個對比，發現曲線的趨勢相當的接近在我們的模型推導之中，我們發現了一個離子之間有一個隨著濃度增加而增加的庫倫作用力，此力會將正負離子吸引在一起，我們也希望用此來解釋，當溶液濃度高到一個程度時，溶液會有結晶析出的現象。並且我們希望用利用物理觀點，來解釋離子在溶液中的運動行為，在解釋模擬參數的過程之中，我們可以發現，具有較大質量的離子，散射率較小；較小質量的離子，散射率較大，此發現可以解釋在化學界中，利用水合能的觀念，來解釋離子在水中的等效質量變化，以及大小離子在水中感受到不同的阻力。

關鍵字

群聚庫倫作用力；阻尼力；離子；微電泳槽

並列摘要

Movement of ions in the solution behavior, since ancient times both in the chemical industry or the biosphere, all people want to understand the issues. We use the electric field to drive ion movement, but if we supply the DC field , we may make the charge accumulation near the electrode, that may cause our uncertainty of our measure environment. Therefore, we will change for the AC current electric field, in order to avoid charge accumulation of the issue, hoping to make the measurement environment not to change over time. Applied electric field according to testing by the ionic current, we derive a model to explain the ion movement in the exchange of electric field behavior and the theoretical value will make a comparison with the experimental results and found quite close to the trend curve. In our model derivation, we have found a coulomb force between ions that will change with increasing concentration, this force will attract positive and negative ions together, we hope to use this to explain, when the high concentration to a degree, the solution will be the crystallization phenomenon. And we hope that with the use of physical point of view, to explain the movement of ions in the solution behavior, in explaining the process of simulation parameters, we can find, have greater mass of the ions, the smaller the scattering rate; smaller mass ion, scattering rate is larger, this finding can be interpreted in the chemical industry, the use of hydration to the concept to explain the equivalent ions in the water quality changes, and size of the ions in the water can feel a different resistance.

並列關鍵字

Collective coulomb force ； Damping force ； Ion ； Microfluidic channel

參考文獻

1 、D. D. Eley and D. I. Spivey, Trans. Faraday Soc., 58, 411 – 415 (1962)

6 、M. R. Bown and C. D. Meinhart, Microfluid Nanofluid, 2: 513-523 (2006)

7 、Youdong Mao et al., Nucleic Acids Research, Vol. 35, No. 5 e33 (2007)

8 、Noritada Kaji, Masanori Ueda, and Yoshinobu Baba, Biophysical Journal, Volume 82, 335-344 (2002)

9 、Charles Polk, IEEE Transaction on Education, Vol. 34, No. 3 (1991)

國際替代計量

電解質溶液的離子在微電泳槽之運動

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