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In this study, we aim to keep track of how creative ideas in economic sciences have been created and diffused into successive research. Toward that end, we investigate the intellectual landscapes of the Nobel Prize awardees' research and the articles citing the literature. Our study is based on two sets of bibliographic records retrieved from the Web of Science. The "Creation" dataset, obtained through an author search, contains 1,745 original research and review articles of the laureates. The "Diffusion" dataset, consisting of 134,866 records, was collected by citation expansion. We identified bursting keywords and intellectual landscapes of the domain in creation and diffusion perspectives. We found that the dominant research themes that had influenced the laureates' research from 1980 till 1999 were macroeconomic tests and economic analysis in time series. Then, the creative ideas have diverged into a variety of issues such as labor market, economic governance, market design, asset pricing, and economic decision making. We identified that these ideas have been diffused into successive research topics such as intertemporal general equilibrium model, reciprocity in economics, estimating profitable asset pricing, and socioecological economics. Finally, it is argued that economic research around the laureates has become divergent over time.

In the present study, we aim to quantitatively investigate and compare the intellectual landscapes of single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) research between 2000 and 2014. The overall intellectual structure of these fields is illustrated by emerging trends of bursting keywords and thematic concentrations of co-cited references. This study is based on two sets of bibliographic records retrieved from the Web of Science database. The SWCNTs dataset contains 18,700 original research and review articles. The MWCNTs dataset, consisting of 23,584 records, is also collected from the database. We find that both domains have scrutinized chemical concepts which underlie the properties of the materials. Recent thematic trends show that MWCNTs research focuses on the improvement of the material while SWCNTs research lays more emphasis on their applications. In conclusion, it is argued that SWCNTs and MWCNTs have co-evolved. At the same time, both fields are distinctively diverging with their own scientific concerns.