Optical Feature Stimulation Of Diatom Hierarchical Configuration And Biomimetic Synthesis

As the most promising energy power,solar energy is abundant,clean and renewable,however,it is also faced with a vital problem,low utilizing efficiency,which mainly results from the low absorption of light.Photosynthesis effect is an universal and efficient method of making use of solar energy in nature,among all the photosynthesis creatures,a single cell algae called diatom stands out on the grounds of its high efficiency and intricate structure and in turn draw the attention of research.It is universally believed these special optical features like photo crystal property have relation with its intricate hierarchical structure.In this article,the interaction between diatom structure and absorbing of light is illustrated from the perspective of bionics.We firstly collect several Centricae diatom samples and use SEM as well as TEM to get a glimpse of their surface and inner structures,after which the 3D Finite Difference Time Domain method is utilized to make diatom structure model and do control experiments in order to find the key aspects in terms of light absorption.Based on the analysis,distribution pattern,diameter and distance of holes,girdle band and its intricate structure can all contribute to light capture.In addition,we try to find the theory behind these behaviors and finally build the optimized model to be used in the synthesis process.Subsequently,we syntheses the intricate structures on PMMA,making use of micro-and nano-processing method,namely e-beam lithography and nano imprint.With other processing method like deep silicon etching added to it,it will give rise to another road to hieratical porous photo catalysis in the near future.Our work show the importance of understanding how light has interaction with materials which has intricate inner scheme and structure,what’s more,it also show the great effect of micro-and nano-processing method in modifying bulk materials.It shows precious indications of improvement in artificial photo synthesis and light capture material field.