There are several social networking sites for scientists and researchers to share papers, ask and answer questions, and find collaborators. Once you create a free account on these sites, you can follow specific researchers and receive alerts when they post new papers, or search for a given topic to find researchers working in that field:
Most of our library databases can also be set up to send you saved search alerts, most journals can send new issue alerts, and you can set up alerts for new articles by a researcher or for new papers citing a specific paper.
Don't know where to start? Try a general database to get sense of what your topic is all about.