growth experiments the silicon substrate covered with an ashy mass was observed under a scanning electron microscope sem fig1 through 16 show micrographs of silicon fibers of various thickness and length fig1 shows a group of nanowires these fibers were grown with h2 n2 ratio of 0 005 pressure of 30 torr and microwave power of 1000 w fig2 shows silicon nanofibers for short time scale growth initial one hour fig3 shows a silicon nanoneedle the h2 n2 ratio was kept at 0 008 chamber pressure was 40 torr and 800 w of microwave power was applied fig4 shows a web of fibers grown for a longer time of five hours due to the long growth duration the grown wires were very long and intermingled the length of the synthesized nanowires depends solely on the duration of the experiment fig5 shows a plurality of oriented silicon fibers these fibers were grown with h2 n2 ratio of 0 0075 pressure of 50 torr and 1000 w of microwave power fig6 shows a astex model 5010 bell jar reactor chamber equipped with an astex model 2115 1500 w microwave power generator fig7 shows silicon nanowires u02dc 10 nm diameter growing as a plurality of filaments after a growth experiment for 8 hours with a microwave power of.