Coping with the delineation of emerging fields: Nanoscience and Nanotechnology as a case study Muñoz Ecija, Teresa Vargas Quesada, Benjamín Chinchilla-Rodríguez, Zaida bibliometrics Science clasification Research topic Field delineation Scientometrics Proper field delineation plays an important role in scientometric studies, although it is a tough task. Based on an emerging and interdisciplinary field —nanoscience and nanotechnology— this paper highlights the problem of field delineation. First we review the related literature. Then, three different approaches to delineate a field of knowledge were applied at three different levels of aggregation: subject category, publication level, and journal level. Expert opinion interviews served to assess the data, and precision and recall of each approach were calculated for comparison. Our findings confirm that field delineation is a complicated issue at both the quantitative and the qualitative level, even when experts validate results 2024-12-17T09:20:15Z 2024-12-17T09:20:15Z 2019-11 journal article https://hdl.handle.net/10481/98107 10.1016/j.joi.2019.100976 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier