Papers by Keyword: Bio-Limited Forming

Abstract: In this paper, microorganism cells (Spirulina platens) were used as forming templates for the fabrication of the helical functional particles with standard shape by electroless silver plating method. The cell form, components and the dielectric properties were observed and analyzed using various tools including optical microscopy, scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and vector network analyzer. The results indicate that the silver coatings on the surfaces of spirulina platensis cells are continuous and compact. The coating thickness of the cells increases with increasing plating time and load, in turn resulting in the increase of the dielectric constant. Furthermore, when the coating thickness is larger than 0.42μm, the samples exhibit significantly percolation phenomenon, indicating that the cells deposited silver form conductive network or electron tunneling in the composites.

Abstract: Micro-composite sol-gel coating was introduced into bio-limited forming technology for the first time, and the feasibility of the micro-composite sol-gel coating on microorganism was verified. The composite coated microorganism was observed by using optical microscopy. The results showed that the micro-particles of carbonyl iron could remain being fixed on the surface of cells of spirulina platensis by sol-gel process after repeated washings and collections and by using second sol-gel process the micro structures of microorganism would be kept well after drying. The co-deposition mechanism of the composite coating was also discussed.

Abstract: The nano-composite electroless coating was introduced into bio-limited forming technology for the first time, and the feasibility of the nano-composite electroless coating on microorganism was verified. The composite coated microorganism was analyzed by using optical microscopy, scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). The results showed that stirring method would make significant effect on the content of nano-particles in the composite coating. And compared with mechanical stirring, the magnetical stirring makes the content of Fe in the composite coating increase almost twice. The co-deposition mechanism of the composite coating was also discussed.