本研究利用聚偏二氟乙烯(Poyl(vinylidene fluoride))當作壓電感測器的塗佈膜，探討PVDF與蛋白質間的作用力。研究發現具有非極性的a-phase PVDF薄膜會吸附較多的蛋白質，因為非極性的a-phase PVDF與蛋白質之間是以疏水性作用力互相鍵結，將蛋白質固定在PVDF薄膜上。
本研究同時研製一固定化之抗體(anti-IgG)－a相PVDF塗佈之免疫壓電感測器，以偵測水溶液中的抗原(IgG)。結果顯示，固定後的抗體(anti-IgG)依然保有活性，可吸附及偵測到水溶液中的抗原。針對Anti-IgG的濃度及PVDF 的塗佈量作探討，發現塗佈1.1mg PVDF及注入0.025mg/ml抗體可獲得最大訊號。觀察到Anti-IgG－IgG結合成一穩定的復合體，並發現可利用Glycine-HCl打斷抗體－抗原之間的作用力，若重複再注入抗原，發現有相同反應，證實此PVDF/Anti-IgG壓電晶體感測器可用來重複偵測IgG存在，且有相當不錯的再現性。若將此PVDF/Anti-IgG保存在4℃下，可保存其有效性六天以上。同時發現本研究因為pH值、溫度會影響anti-IgG與IgG的反應，發現pH在7.2左右，溫度是在35℃下為最適條件，此PVDF-anti-IgG免疫壓電感測器對IgG的偵測下限可達146.7 ng/mL。
本研究並觀察金屬離子和有機物質存在下，是否會影響抗體－抗原反應。研究發現在Mn2+、Cd2+存在下，並不會影響anti-IgG與IgG反應，但是Zn2+會。在有機物質方面，丙酮、丙醛、丙酸稍微會影響到anti-IgG與IgG反應，但是丙胺會使IgG完全變性，造成anti-IgG與IgG無法反應。
另外，本研究亦探討PVDF和金屬離子作用力，利用製造PVDF薄膜的過程中填入金屬離子化合物，希望獲得具有較多b相含量的極性且具有壓電性薄膜。針對不同溶劑作研究，觀察IR光譜發現PVDF溶於80% acetone+20% DMSO會獲得b+g 的混合相。PVDF溶於80% acetone+20% DMSO中並加入不同陰離子的二價銅化合物製膜，發現在硝酸根及硫酸根的IR光譜中觀察到有較多比例的b相的產生。在PVDF填入16種金屬離子化合物的IR光譜中觀察到，Cd(NO3)2填入PVDF中時會獲得最多比例的b相。金屬離子和PVDF之間主要是靜電吸引力，當金屬帶較多的正電時(如Nb5+、Cr3+)會有較多比例的b相的產生。同時亦發現金屬離子的大小也會影響b相的產生，因為第三過渡金屬因離子半徑太大，實驗結果顯示b相的比例都不高，另外，發現加入Cd2+會大幅增加b相的比例，除了Cd2+因靜電和PVDF互相吸引外，可能因其大小剛好能吸引相隔一段的氟原子靠近，所以能獲得最多比例的b相。實驗結果顯示加入過渡金屬離子化合物都能增加b相的比例，就有機會能製成壓電膜，如此一來一極性的PVDF壓電薄膜就就能容易製作了。

The PVDF coated piezoelectric quartz crystal sensor was employed to study the interaction between PVDF and Proteins. The partially irreversible responses for these proteins were observed by the desorption study, which implied these proteins could be immobilized onto PVDF coated PZ crystals and proteins immobilized onto a phase of PVDF was better than onto a+g phase of PVDF. Proteins were immobilized onto nonpolar a phase of PVDF by hydrophobic interaction.
The antibody (anti-human IgG) immobilization on a phase of PVDF was applied in a piezoelectric crystal immunosensor for human IgG in water. The immobilized antibody was still actived that could be used to detect human IgG in water. The antibody immobilization was influenced by PVDF coating load and anti-IgG concentration; The optimum PVDF coating load was found to be 1.1mg with 0.025mg/mL anti-IgG. The strong interaction between IgG and anti-IgG was found, and thus Glycine-HCl could be used to desorb IgG form Anti-IgG. The piezoelectric immuno-sensor could bw reused for human IgG with good reproducibility. The lifetime of immobilized PVDF/anti-human IgG was about 6 days at 4℃. The interaction of anti-human IgG and human IgG was influenced by pH, temperature, and IgG concentration. Optimum pH and optimum temperature were found to be 7.2 and 35℃ respectively. The detection limit of the sensor for IgG was found to be 146.7 ng/mL. The interaction of anti-human IgG and human IgG affinity in organic solvents such as acetone, propylamin, propyl aldehyde, propyl acid was studied. The interference of ions (e.g. Cd2+, Mn2+, Zn2+, Co2+) were also investigated and discussed.
Furthermore, the interaction of PVDF and metallic compound were also investigated. PVDF films, filled with various of transition metal compounds, were prepared. The effects of crystalline and electronic structural variations were investigated by infrared analysis. The b+g phase PVDF films could be prepared by dissolving PVDF in 80% acetone+20% DMSO. The b-phase PVDF could be obtained by dissolving PVDF in 80% acetone+20% DMSO with copper salts, e.g., Copper(Ⅱ) Sulfate and Copper(Ⅱ) nitrate. The IR spectra were employed to detect PVDF with 16 transition metal ions. Among these metal ions the addition of Cadmium(Ⅱ) nitrate resulted in the greatest b-phase content PVDF. The interaction between PVDF and transition metal ions was proposed to be electrostatic attraction, and the doping of metal ions with higher charges (e.g., Nb5+andCr3+) could result in higher b-phase content. The effect of radius of metal ions was also found the formation of b-phase of PVDF. The third transition metals with quite big radii gave low content of b-phase PVDF. In contrast, the doping of Cd(Ⅱ) result in quite high content of b-phase PVDF which could be attributed to and the Cd(Ⅱ) ion can be filled in the space between two fluorine atoms quite well. Owing to the presence of transition metal ion would increase b-phase content of PVDF, so a polar and piezoelectricity PVDF film could be simply prepared.

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