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標題: | 具拉伸及生物可相容性之水膠:製備、特性分析及於電阻式記憶體應用 Fabrication and Characterization of a Stretchable and Biocompatible Pseudo-Hydrogel for Resistor Memory Device Applications |
作者: | Mercedes Wu 吳加恩 |
指導教授: | 陳文章(Wen-Chang Chen) |
關鍵字: | 拉伸性,水膠,電阻式記憶體,生物相容性,可分解性, stretchable,hydrogel,resistor memory,biocompatible,disintegratable, |
出版年 : | 2017 |
學位: | 碩士 |
摘要: | Abstract
Biodegradable/biocompatible organic materials are a safe, non-toxic, renewable, and low-cost alternative to traditional inorganic and plastic options. In the world of electronic substrates, hydrogels are a viable “green” alternative to traditional stretchable electronic substrates but lack a direct integration pathway because of intrinsic properties like solvent evaporation, high water content, and poor mechanical characteristics. If these weaknesses were overcome, a suitable scaffold for fully stretchable, non-toxic, and biocompatible electronics could be recognized. In the first part of the thesis (chapter 2), a biocompatible, non-toxic, self-healing, mechanically tough, vapor absorbing and retaining, and recyclable PVA:PMAA pseudo-hydrogel is facilely fabricated. TGA, DSC, XRD, FTIR, and self-healing testing were used to confirm that the full blending of PVA and PMAA polymers as well as give insight on the strong hydrogen cross-link bonding between them. Stress-strain curves, relaxation times, loading and unloading mechanical testing revealed the high elongation, fast recovery, and tunable mechanical properties which helped confirm the 3D gel network of the pseudo-hydrogel structure. The pseudo-hydrogel interactions with water were especially important as the gel was able to absorb and retain water vapor which is a novel property. The gel was also able to dissolve fully in water which is important for recycling and biodegradable pathways. In the second part of the thesis (chapter 3), we built upon the stretchable, biocompatible, nontoxic, and water-soluble nature of the pseudo-hydrogel and fabricated a high performance resistive DNA memory device. Using St-DNA as a charge trapping and transporting layer, the memory device was fabricated using a structure of 1:1 pseudo-hydrogel/1:4 PEDOT:PU/St-DNA/1:4 PEDOT:PU to preserve the “green” properties of the pseudo-hydrogel. The device exhibited WORM memory characteristics similar to literature findings with a Vc,ON of 2V, a high ON/OFF current ratio of 104 and a long retention time of 104s. The device also retained these memory characteristics under 10, 30, and 50% strain as well as 1000 strain cycles at 30% strain. The device could be easily dissolved in DI water, which opens up recyclability, bioresorbability, and biodegradability potential. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/7748 |
DOI: | 10.6342/NTU201702068 |
全文授權: | 同意授權(全球公開) |
顯示於系所單位: | 化學工程學系 |
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