【摘要】 分别用正硅酸乙酯(TEOS)和Na2SiO3为硅源培养真核啤酒酵母、近似内孢霉酵母和黑根霉菌,进行纳米SiO2的生物沉积实验,对沉积的SiO2采用SEM、TEM、EDX、ED等测试技术进行表征。结果表明,(1)啤酒酵母沉积颗粒状SiO2纳米粒子;(2)近似内孢霉酵母沉积壳鞘状的SiO2纳米结构;(3)黑根霉菌沉积管状的SiO2纳米结构;(4)真核微生物既能利用TEOS也可以利用Na2SiO3进行矿化。说明真核微生物矿化与模板组成、表面张力、空间结构及硅营养等因素有关,为利用真核微生物矿化材料提供了有益信息。更多还原

【Abstract】 We chose three epiphytes,Saccharomyces cerevisiae,Endomyces decipiens,Rhizopus Nigricans,with two kinds of silicon sources tetraethyl orthosilicate(TEOS) and Na2SiO3,to carry out the biological nano-structured SiO2 deposition via biomineralization.The samples were investigated by SEM,TEM,EDX,and ED,and the results indicate that(1)Saccharomyces cerevisiae deposited a SiO2 nano-granule;(2)Endomyces decipiens deposited a nano-shell SiO2;(3)Rhizopus Nigricans deposited a SiO2 nano-tube;(4)the epiphyte can use not only TEOS but also Na2SiO3.The epiphyte mineralization depended on surface tension,template composition,spatial structure and silicon nutrition.更多还原