Functional 2D nanomaterials for optoelectronics based on langmuir bacteriorhodopsin films
Functional 2D nanomaterials for optoelectronics based on langmuir bacteriorhodopsin films
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基于朗缪尔细菌视紫红质薄膜的光电功能二维纳米材料
DOI：
10.1016/j.moem.2016.12.007
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
L. Kozhitov
中科院分区：
文献类型：
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作者：
S. I. Valyansky;E. K. Naimi;L. Kozhitov
我们已经测试了使用单分子层的细菌视紫红质（BR）的高灵敏度和高选择性的传感器的基础上的二次谐波产生和表面等离子体波的合成的可能性。我们已经使用了各种方法来研究BR的Langmuir-Blodgett膜的光学和非线性光学性质，以澄清BR分子在从水表面转移到固体基底的过程中保留特定性质的程度。我们表明，二次谐波产生方法是有效的分析分子取向和LB膜的质量。实验测得二级BR分子的非线性光学极化率为3.4·10− 11 m/V，在630 nm激发光波长处共振波矢的相对变化为（3.6±0.1）·10− 2。我们得到了表面等离子体波入射辐射有效激发的BR谱。在这些研究的基础上，我们提出了新的生物传感器方案的基础上操作的二次谐波产生和表面等离子体共振引起的基频反射BR单分子层。该方案进行了测试的模型设备，并证明了获得的顺序为1011分子/cm 3的灵敏度的可能性。
We have tested the possibility of using monomolecular layers of bacteriorhodopsin (BR) for the synthesis of highly sensitive and highly selective sensors based on second harmonic generation and surface plasma waves. We have used various methods to study the optical and nonlinear optical properties of Langmuir-Blodgett films of BR in order to clarify the extent to which specific properties of BR molecules are retained during their transfer from the surface of water to a solid substrate. We show that the second harmonic generation method is efficient for analyzing the molecular orientation and quality of Langmuir-Blodgett films. The experimental nonlinear optical susceptibility of second order BR molecules is 3.4·10−11m/V. The relative change in the resonant wave vector is (3.6±0.1)·10−2at an excitation light wavelength of 630 nm. We have obtained a BR spectrum with the effective excitation by incident radiation of surface plasma waves. On the basis of these studies, we have proposed new schemes of biosensors operating on the basis of second harmonic generation and surface plasma resonance caused by fundamental frequency reflection from BR monomolecular layers. This scheme was tested for a model device and demonstrated the possibility of obtaining sensitivities of the order of 1011molecules/cm3.