I remember reading a blog post a few weeks ago which talked about a few special characters which can be used to make your title/description get noticed easier in the search engine results, but can't find it anymore.
I have not tested this myself so take it as you will, my thinking on this is adding these kinds of characters/symbols would most probably hurt you as the average user is probably thinking spyware/virus/adware if they click that link, it just looks messy and unsafe.
But as I said I have not tested it so I wouldn't know.