Articles commonly fall into one of three main categories: Full papers, Communications and Reviews. However, each journal will have further, specific article types, so you should always refer to a journal’s specific guidelines while preparing your manuscript.
Full papers are original, unpublished primary research. Extensions of work that has been published previously in short form such as a Communication are usually acceptable.
Communications must contain original and highly significant work whose high novelty warrants rapid publication. Some journals have page limits for Communications.
Reviews may be an authoritative overview of a field, a comprehensive literature review, or tutorial-style reference materials. Reviews are usually invited by the editor, but a topic may be proposed by an author by contacting a journal’s editorial office.