The adsorption of fibrinogen can be used as a quick indication of surfacehaemocompatibility determination because it's prominent role in coagulation,in this study the molecular interaction between fibrinogen and modified titanium dioxide surface/platelet has been studied by quartz crystal microbalance with dissipation(QCM-D)and infrared spectroscopy(IR)in situ.These investigations revealed the fibrinogen have the trend to adsorb on hydrophilic surface in a side-on orientation by positively charged aC domain...