Not typically. If the creator has the appropriate feats, she can make a higher-level scroll/wand that incorporates a metamagic'ed version of the spell (for example, a wand of heightened magic missile to more easily penetrate spell resistance), but it's not usually worth the cost.
If you simply have a vanilla scroll/wand, however, you can't add metamagic retroactively to it.
Happy to help!
You cannot apply such feats to an existing wand or scroll, but it is possible to have a wand or scroll of maximized magic missile, for example. Such a wand or scroll would be priced as a 4th-level spell, rather than a 1st.