The Study For Formation Dynamic Of Gel Nanofiber Structure And Its Nature Of The Chiral

In this paper, the dynamic-structure relationship was established on the use of Avrami model and the expansion of Dickinson model with an organic gel small molecule GP-1 as study object and rheological technology and microscopy techniques as study basis. This relationship allows us to understand more deeply the important role that dynamic control plays in the process of gel formation. In addition, by utilizing circular dichroism, we also studied the chiral of gold nanorods helix formed by gel fiber bundle-gold nanorod self-assembled hybrid. The gold nanorods helix has strong collective surface plasmonic optical activity, which shows great application value in terms of molecular chirality sensing. At the same time, we also explored the application of the unique optical properties of organic gel molecules(GP-1)- gold nanorod self-assembly/self-organization hybrid system on the chiral molecular detection.This paper is divided into the following areas:(1) the analysis and study of formation dynamics on spherulitic network structure and fiber network structure in the use of Avrami theory. By Avrami analysis, we got the different dynamics characteristics of fiber growing, fiber branching and fiber bundling in the process of gel network structure formation. This work contributed to the deeper understanding of the importance of dynamics control when regulating the structure and property of fiber network;(2) the fractal analysis of fiber network structure of various gel systems in the use of the expansion Dickinson model and the dynamics-structure relationship applied to dilute and concentrated gel system was established. Compared with the current method of fractal analysis, our model can be applied in a wider scope;(3) the study of the impact, in gelation process, 1D space confinement has on the fiber network formation dynamics, structure and property. The gel film under such condition has better flexibility, which brings a broader application prospect;(4) to obtain different pitch nano fiber bundling by adjusting the concentration of CTAB. With the nano fiber bundling being the template, we constructed gold nanorods helix, which helped us to obtain gold nanorod self-assemby chiral conformation in the solution and observe a new CD spectra in the collective plasmonic resonance frequency(visible range);(5) the construction of one-dimensional linear chain and chiral super-structure of the surface plasmon optical property with the interaction of cysteine molecules and the chiral probe, i.e. gel molecules(GP-1)-gold nanorod self-assembly/self-organization hybrid system. We not only detected the L-cys and D-cys molecules enantiomers, but also achieved high sensitivity detection on cysteine molecules and the distinction of chiral enantiomer. The minimum detectable molar concentrations of cysteine molecule is 4.5μM and the surface Plasmon chiral probes we got have high sensitivity.We believe that by studying these small molecule organic gels, we have a more in-depth understanding and knowledge on the formation kinetics of small molecule organic gel, which is helpful for us to understand the impact of dynamics control on regulating the structure and property of fiber network. Besides, by further studying the new surface plasmon optical activity generated by nano fiber bundling/gel molecules(GP-1)-gold nanorods self-assembly/self-organization hybrid metal nano/micro structures, we found a new method of controlling different pitch nano fiber bundling, which brings a new thought on the study of gold nanorods helix with the nano fiber bundling being the template in future. Last but not the least; we achieved a high sensitivity detection method by interacting GP-1 to cysteine molecule-gold nano particle self-assembly system for the first time, which brings new opportunities to the application of artificial nano/micro functional structures in such areas as biological sensing, disease detection, diagnosis, treatment and so on.