(a) |

(b) |

Figure 2: Dynamic frequency test at the constant strain of 250% showing the storage and loss modulus change as a function of frequency sweep for colloidal suspension of fumed silica in PEG with various loading amount of GO and silica (the numbers represent the concentration of each component in weight ratio). (a) Storage modulus as a function of frequency; (b) loss modulus as a function of frequency. |