I often find myself wanting to find brand-new scientific articles within certain search parameters (e.g., words in the title, journal, etc.) that are currently "trending" in scholarly or public attention. As far as I know, standard academic search engines that allow the use of such search parameters offer only metrics such as citation counts, whereas I am interested in something more immediate like Altmetrics. Searching sites like Twitter or Google News better captures instantaneous public attention, but allows only the most rudimentary of searches.
I found ScienceOpen, but it seems to have an extremely limited set of journal articles.
What's the closest thing to a Google Scholar-Altmetrics lovechild?