Nurses can do all sorts of writing!
There are tons of nursing journals--some are very scientific/clinical and demonstrate research nurses have been involved with (usually regarding patient care, staffing issues, incorporating new policies in specific healthcare settings, etc). Or there are more general magazine-like journals, where nurses write articles for other nurses. These can be about changes in healthcare, new drugs or laws, or opinion pieces.
Nurses may write grants or proposals. They may write on behalf of their hospital--for hospital newsletters, policy change suggestions, etc.
Even a nurse who has no interest in writing learns how to be a good writer: nursing notes, careplans, progress reports, teaching documents... all of these have to be clear, concise, and relevant. Plus, nurses have to be aware that what they write should be legally/ethically sound.
Does that answer your question? I highly doubt anyone would give you a "sample," as that sounds a little ethically gray. But, you can certainly check out nursing journals as someone else suggested, or look online for examples of effective nursing notes and documentation examples.