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cityengle2609

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[资源] Virus-based piezoelectric energy generation 基于病毒微生物的压电效应的发电机

基于病毒、噬菌体等微生物的发电机 Virus-based piezoelectric energy generation

【期刊】Nature Nanotechnology

【标题】Virus-based piezoelectric energy generation

【链接】http://www.nature.com/nnano/journal/v7/n6/full/nnano.2012.69.html

【推荐理由】新能源的研究一直是近年来研究的热门课题，一方面是太阳能电池，超级电容，锂电等大能量密度，功率密度的储能发电设备；另一方面则是利用压电，热电等效应发展的微观发电机将环境中的能量转换为电能。传统的材料多为具有压电铁电效应的陶瓷，半导体，聚合物，如王中林教授近年来的发展的基于氧化锌的压电电子自供电发电机，基于压电含氟聚合物的generator研究。近期出现了一些基于生物体得发电机，比如之前的蜗牛发电，以及这篇噬菌体发电。

本文在分子水平上表征了噬菌体具有结构依赖型的压电性质，并成功的发展了一个可以提供6nA输出电流，400mV输出电压的发电机，并用来驱动液晶显示器

【摘要】Piezoelectric materials can convert mechanical energy into electrical energy1, 2, and piezoelectric devices made of a variety of inorganic materials3, 4, 5 and organic polymers6 have been demonstrated. However, synthesizing such materials often requires toxic starting compounds, harsh conditions and/or complex procedures7. Previously, it was shown that hierarchically organized natural materials such as bones8, collagen fibrils9, 10 and peptide nanotubes11, 12 can display piezoelectric properties. Here, we demonstrate that the piezoelectric and liquid-crystalline properties of M13 bacteriophage (phage) can be used to generate electrical energy. Using piezoresponse force microscopy, we characterize the structure-dependent piezoelectric properties of the phage at the molecular level. We then show that self-assembled thin films of phage can exhibit piezoelectric strengths of up to 7.8 pm V−1. We also demonstrate that it is possible to modulate the dipole strength of the phage, hence tuning the piezoelectric response, by genetically engineering the major coat proteins of the phage. Finally, we develop a phage-based piezoelectric generator that produces up to 6 nA of current and 400 mV of potential and use it to operate a liquid-crystal display. Because biotechnology techniques enable large-scale production of genetically modified phages, phage-based piezoelectric materials potentially offer a simple and environmentally friendly approach to piezoelectric energy generation.

全文链接的网页最后有附件视频资料，有兴趣的可以看看[ Last edited by cityengle2609 on 2012-7-6 at 10:04 ]

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