Effect of the length of silicon nanodot/wire on band gap

We will report on the role of the length of silicon nanowire (SNW) in determining the band gap of a structure. We find that the band gap decreases with SNW length for the same diameter and approaches the band gap for an ideal infinitely long SNW. The H/T atomic ratio can be used to express the S/V ratio, which is approximately linearly related to band gap value.