CINAHL is the best database ACC provides for identifying nursing articles. You may find nursing research articles using some of the other health science article databases, such as Health Source Nursing/Academic Edition and Gale OneFile: Health and Medicine, but CINAHL offers a level of searching focus that is unique.
When beginning a search in CINAHL, you'll see this screen. Below the search bar, you can see some ways to limit your results such as finding only full-text or peer-reviewed sources. For more options, click on 'Advanced Search' instead and select some options such as limiting your search results to Nursing journals only. Of course, you can change any of these limiters to suit your needs -- this example just shows how to get started.