The electrospinning technique involves the use of a high voltage to charge the surface of a polymer solution droplet and thus to induce the ejection of a liquid jet through a spinneret. Due to bending instability, the jet is subsequently stretched by many times to form continuous, ultrathin fibers. Therefore, the process is carried out for electric conductive solutions. Consequently, the electrospinning is widely used for the production of many polymeric nanofibers. Moreover, the elctrospinning have been exploited to produce metal oxides [12] or pure metal nanofibers [13], [14], [15] and [16] by calcination of electrospun mats obtained from completely miscible sol–gel solutions. However, we are introducing electrospinning of colloidal solutions, different solid nanopowders and polymers as well have been utilized. Electrospinning of colloidal solution can be conceptually illustrated in Scheme 2. As shown in this scheme, the colloidal solution might have solid nanoparticles with different sizes. During the electrospinning process, the particles having diameter less than the diameter of the polymeric nanofibers will be imprisoned inside the nanofibers. Actually, we think that the incorporation process might depend on the surface tension of the polymer solution and the wettability between the solid particle and the polymer solution. In other words, high surface tension and good wettability reveal well imprisoning of the small nanoparticles. However, the big particles will stick on the polymeric nanofibers.