Each institution's position in the ranking is determined by the sum of D-indexes (Discipline H-index) of all its affiliated scholars whose principal publication area is Materials Science. The D-index is discipline-specific, incorporating exclusively publications and citations relevant to the examined field, thereby ensuring high levels of accuracy and subject relevance in the assessment.
Scope of Research and Ranking Criteria
The scope of the bibliometric analysis was substantial: 279,971 scientist profiles were initially identified from a diverse range of data sources. Out of these, 37,821 scholars specializing in Materials Science were meticulously analyzed. To ensure quality and impact, the qualifying D-index threshold for individual scientists was set at 40, and a majority of their top-tier publications had to be in Materials Science.
Beyond raw bibliometric indicators, scientists' awards and achievements in Materials Science were also considered in the evaluation process, recognizing distinguished contributions and leadership in the field. The threshold for the D-index is adaptive: it increases in increments of 10 based on the total number of scholars estimated in each discipline, with the aim of always including the top 1% of leading scholars. Furthermore, the difference between a scientist’s general H-index and the discipline-specific D-index had to remain at 30% or less, ensuring a strong focus within the discipline when identifying leading experts.
These careful criteria yield a ranking framework that genuinely reflects excellence and leadership in Materials Science.
Additional Verification Practices
The Research.com team recognizes that raw data should never be viewed as an absolute measure of scholarly impact. Full manual verification of every scientist profile was conducted, with cross-referencing against publications in a wide array of trusted sources, to ensure authenticity and disciplinary alignment.
While not directly contributing to a researcher's position in the ranking, the volume of papers published in eminent journals and leading conference proceedings is viewed as a valuable indicator of sustained contribution to a particular scientific field. Ultimately, the ranking order is established based on each scientist’s D-index, ascertained through rigorous data collection from OpenAlex and CrossRef—the most prominent and widely trusted bibliometric resources available to the global research community.
Readers interested in a detailed explanation of the statistical and analytical techniques underpinning the ranking are encouraged to visit our methodology page.
Research.com's Mission and Agenda
Research.com is committed to fostering transparency and excellence in the academic community. Our mission is to motivate scientists, business leaders, and policymakers around the world to examine the trajectories of top experts, and to provide the research community with clear, reliable insights into who the leading scholars are—whether by discipline, country, or institution. We strive to facilitate informed decision-making within academia and beyond by identifying hubs of expertise that lead progress in science and technology.
Key Results of the 4th Edition Ranking
- Top 3 institutions in Poland by number of leading Materials Science scientists:
- Warsaw University of Technology (4 scientists)
- Poznań University of Technology (3 scientists)
- Silesian University of Technology (3 scientists)
- The world’s most prominent scholars in Materials Science are affiliated with: Georgia Institute of Technology, École Polytechnique Fédérale de Lausanne, MIT, Harvard University, Stanford University, Drexel University, China University of Geosciences, Rice University, City University of Hong Kong, and Tsinghua University.
- Professor Zhong Lin Wang (Georgia Institute of Technology) is ranked as the best scientist in Materials Science worldwide with a D-index of 315.
- Michael Grätzel (École Polytechnique Fédérale de Lausanne) holds the 2nd position globally with a D-index of 292.
- Robert Langer (MIT) is in 3rd place worldwide with a D-index of 288.
- For the top 5% of universities:
- Average total D-index: 3,826
- Average number of published articles: 17,885
- For all 1,282 institutions included in the ranking:
- Average total D-index: 524
- Average number of published articles: 2,500
- The average number of citations among researchers at the top 1% universities is 2,279,971; the average for all ranked universities is 279,971.
The careful integration of large-scale bibliometric data, strict quality criteria, and manual validation underscores the credibility of this ranking. We trust that this research-driven evaluation provides both academic leaders and institutional stakeholders with meaningful, actionable insights into the state and distribution of excellence in Materials Science within Poland and globally.
