奈米科技已廣泛的運用於許多領域，例如:感測器、太陽能電池、生醫系統以及其它領域。本實驗為研究紫質衍生物與石墨烯衍生物的複合材料並將其應用於感測器上。在此，紫質衍生物使用四(4-羧苯基)紫質(TCPP)，而石墨烯衍生物使用氧化石墨烯(GO)以及還原氧化石墨烯(RGO)。首先經由非共價的方式(芳香族π-π堆疊)來合成GO複合物(GO-TCPP)以及藉由化學還原法來合成還原氧化石墨烯。每一個溶液的光電性質以及GO和RGO的型態都顯示一致的結果，此結果證實石墨烯的單層具自我組裝能力以及在電子受體和予體間具備電子傳遞現象。
本實驗由單層自我組裝法來製備ITO電極上的薄膜。在此，藉由APTES做為聯結ITO電極和紫質/石墨烯衍生物。不同的薄膜均可用APTES鍵結架橋，並浸泡於不同條件的溶液24小時。另外，經由循環伏安法所測得的結果可得知GO-TCPP/APTES/ITO電極比TCPP/RGO/APTES/ITO電極有更高的電子傳送速率。以分光光譜法及電化學測定法來檢測水溶液之金屬離子(Cu2+，Zn2+，和Fe2+)。由分光光譜以及電化學測定的結果可知TCPP傾向於與Cu2+離子結合。這是因為TCPP上的吡咯環及羧基可與Cu2+離子結合。另一方面，GO複合物(GO-TCPP)對於Cu2+離子呈現最佳的電化學行為，這是由於GO具有導體的特性，因此可以促進電子傳遞。其中，GO對Cu2+離子的高敏感性與其特殊電子傳遞程序有關。

Nanotechnology has been extensively utilized in many field of applications, such as sensors. This research reported about preparation of porphyrin derivative/graphene derivative composite and their sensor application. Porphyrin derivative used in this research was tetrakis(4-carboxyphenyl)porphyrin (TCPP), whereas graphene derivatives used were graphene oxide (GO) and reduced graphene oxide (RGO). It began with a synthesis of composite (GO-TCPP) by non-covalent strategy through aromatic  stacking and a synthesis of reduced graphene oxide through chemical reduction method. Optical, electrical, and morphological properties of each solution showed acceptable results, indicating self-assembly monolayer and electron transfer process in the presence of electron acceptor and donor.
The preparation of thin films on ITO electrode was carried out via self-assembled monolayer method. APTES was used as a functional group to perform chemical bonding between ITO electrode and porphyrin derivative/graphene derivative. Preparation of each thin film by using APTES as a self-assembled monolayer functional group used 24 hours as an immersion time. Cyclic voltammetry results indicated that GO-TCPP/APTES/ITO electrode has higher conductivity than TCPP/RGO/APTES/ITO electrode. The selective detection of metal ions (Cu2+, Zn2+, and Fe2+) were investigated through spectrophotometry and electrochemical determination method. According to the result of spectrophotometry and electrochemical determination, TCPP have selective detection to Cu2+ ions because TCPP have pyrrole ring and carboxyl groups which play an important role to bind Cu2+ ions. GO composite (GO-TCPP) give the greatest electrochemical behavior to Cu2+ ion since the characteristic of GO as a conductive material could accelerate electron transfer process which related to enhancement of sensitivity performance to Cu2+ ions.

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