  Loop quantum gravity predicts that there are non-zero minimal area, and
non-zero minimal volume in (3+1) dimensions. Given this, one can easily guess
that one will have a non-zero minimal 9-volume in (9+1) dimensions. Therefore,
in this paper, we argue that not only D9-brane but also Dp-brane for p less
than 9 has a 9-volume. This idea is new, as the present view states that such a
Dp-brane has p-volume but no 9 volume. To demonstrate this, first, we equate
D8-brane action with D9-brane action and show that 9th direction which is
perpendicular to D8-brane has non-zero width. We repeat this step for different
ps; we equate Dp-brane action with Dp-1 brane action. By this iteration and
induction we conclude that Dp-brane has non-zero widths for each of (9-p)
directions perpendicular to the Dp-brane, and therefore, non-zero volume. When
antisymmetric tensor and field strength are zero, this width is calculated to
be 2 pi sqrt(alpha') for all (9-p) directions. For non-vanishing antisymmetric
tensor and field strength, the width receives small corrections. In this paper,
we only calculate up to the first order correction.
