collecting substrates for electrospinning the other parameters were the same as those in example 1 three dimensional electrospinning fiber tubular materials having similar structures to those of the substrates and different cross sectional shapes were collected in this process fig2 6 wherein the tube length was 2 cm a group of column shaped copper rods having one arc shaped end were prepared as three dimensional templates the copper rods had square cross sections with a side length of 2 mm this group of column shaped templates were selected as the collecting substrates for electrospinning the templates was arranged with the arc shaped end upward in proximate to the spinneret the other parameters were the same as those in example 1 after spinning each of the collecting copper rods was pulled out from the non arc end so that the structure of the fiber assemblage at the arc end was not impaired three dimensional electrospinning fiber tubular materials having similar structures to those of the substrates and one closed end were collected in this process fig7 wherein the tube lengths were 1 5 cm and 2 cm a group of non column shaped copper rods having different configurations were prepared as three dimensional templates the copper rods were tapers of different taper degrees or had a combination of cylinders with different diameters at different locations the other parameters were the same as those in example 1 after spinning each of the collecting copper rods was pulled out from the non arc end so that the structure of the fiber assemblage.