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The optoelectronic properties of a photosystem I_carbon nanotube hybrid system

机译:光系统I_碳纳米管混合系统的光电特性

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The photoconductance properties of photosystem I (PSI) covalently bound to carbon nanotubes (CNTs) are measured. We demonstrate that the PSI forms active electronic junctions with the CNTs, enabling control of the CNTs' photoconductance by the PSI. In order to electrically contact the photoactive proteins, a cysteine mutant is generated at one end of the PSI by genetic engineering. The CNTs are covalently bound to this reactive group using carbodiimide chemistry. We detect an enhanced photoconductance signal of the hybrid material at photon wavelengths resonant to the absorption maxima of the PSI compared to non-resonant wavelengths. The measurements prove that it is feasible to integrate photosynthetic proteins into optoelectronic circuits at the nanoscale.
机译:测量了共价键合到碳纳米管(CNT)的光系统I(PSI)的光电导特性。我们证明了PSI与CNT形成了有源电子结,从而可以通过PSI控制CNT的光电导。为了使光活性蛋白电接触,通过基因工程在PSI的一端产生半胱氨酸突变体。使用碳二亚胺化学法将CNT共价键合至该反应性基团。与非共振波长相比,我们在共振到PSI吸收最大值的光子波长处检测到杂化材料增强的光电导信号。测量结果证明,将光合蛋白以纳米级整合到光电电路中是可行的。

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