ACADEMIC WRITING: USING NOUNS AS ADJECTIVES

When a noun is used as an adjective, it should (almost) always be singular, e.g. "metal-modified" rather than "metals-modified" and "electrode-based" rather than "electrodes-based".


Exceptions are:

• materials science – Although the Oxford Dictionary includes both "material science" and "materials science", the latter is more commonly used in scientific writing.
• use of "data" and "media" as adjectives, e.g. "data acquisition" and "media company". [1]
• clothes (clothes hanger), sports (sports bag), customs (customs office), accounts (accounts book), arms (arms store) [2]

If you are unsure whether a plural or singular noun should be used as an adjective, you can use Google Scholar to check this. For example, a search for "nanoparticle arrays" gives 26,000 results, while a search for "nanoparticles arrays" gives 1,200.

Using nouns as adjectives can improve the flow of your writing and also reduces the word count; for instance, "reaction product" (2 words) is more concise than "product of the reaction" (4 words).

It should be noted, however, that some publishers do not like nouns to be used as adjectives [3], so it is best to consult the author guidelines for your chosen journal before writing your paper.