Klaus K. Unger

19.7k total citations · 3 hit papers
229 papers, 16.0k citations indexed

About

Klaus K. Unger is a scholar working on Spectroscopy, Materials Chemistry and Biomedical Engineering. According to data from OpenAlex, Klaus K. Unger has authored 229 papers receiving a total of 16.0k indexed citations (citations by other indexed papers that have themselves been cited), including 145 papers in Spectroscopy, 91 papers in Materials Chemistry and 83 papers in Biomedical Engineering. Recurrent topics in Klaus K. Unger's work include Analytical Chemistry and Chromatography (128 papers), Mesoporous Materials and Catalysis (73 papers) and Microfluidic and Capillary Electrophoresis Applications (72 papers). Klaus K. Unger is often cited by papers focused on Analytical Chemistry and Chromatography (128 papers), Mesoporous Materials and Catalysis (73 papers) and Microfluidic and Capillary Electrophoresis Applications (72 papers). Klaus K. Unger collaborates with scholars based in Germany, United States and Australia. Klaus K. Unger's co-authors include M. Grün, K. S. W. Sing, J. Rouquérol, J.D.F. Ramsay, David Avnir, J. M. Haynes, N. Pernicone, C. W. Fairbridge, D. H. Everett and Ferdi Schüth and has published in prestigious journals such as Science, Advanced Materials and Angewandte Chemie International Edition.

In The Last Decade

Klaus K. Unger

226 papers receiving 15.4k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Recommendations for the characterization of porous solids (Technical Report)

1994 3.2k citations Klaus K. Unger et al. profile →
Novel pathways for the preparation of mesoporous MCM-41 materials: control of porosity and morphology

1999 557 citations M. Grün, Klaus K. Unger et al. profile →
The synthesis of micrometer‐ and submicrometer‐size spheres of ordered mesoporous oxide MCM‐41

1997 532 citations M. Grün, Klaus K. Unger et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Klaus K. Unger Germany	59	7.1k	6.0k	4.8k	2.9k	2.2k	229	16.0k
Yizhak Marcus Israel	66	6.4k 0.9×	4.4k 0.7×	3.7k 0.8×	2.5k 0.9×	1.9k 0.9×	357	24.1k
Gary E. Maciel United States	66	5.4k 0.8×	6.4k 1.1×	1.7k 0.4×	2.3k 0.8×	780 0.3×	319	15.4k
David M. Hercules United States	60	5.3k 0.7×	3.7k 0.6×	1.9k 0.4×	700 0.2×	1.7k 0.8×	404	13.8k
Douglas M. Ruthven Canada	58	4.6k 0.6×	3.0k 0.5×	4.4k 0.9×	5.9k 2.1×	1.2k 0.5×	283	14.7k
Bin Hu China	72	3.8k 0.5×	3.6k 0.6×	3.2k 0.7×	3.0k 1.0×	2.3k 1.0×	503	18.9k
Alfredo Sanz‐Medel Spain	59	3.0k 0.4×	4.6k 0.8×	2.0k 0.4×	1.1k 0.4×	2.7k 1.2×	553	16.8k
Xiandeng Hou China	66	5.5k 0.8×	2.9k 0.5×	3.0k 0.6×	2.0k 0.7×	3.4k 1.5×	456	15.6k
William Jones United Kingdom	81	16.1k 2.3×	2.9k 0.5×	3.4k 0.7×	6.0k 2.1×	1.7k 0.8×	477	26.4k
Man He China	58	2.5k 0.4×	2.1k 0.4×	2.3k 0.5×	1.9k 0.6×	1.9k 0.8×	312	11.5k
Sohrab Rohani Canada	60	7.0k 1.0×	1.2k 0.2×	2.9k 0.6×	2.4k 0.8×	848 0.4×	429	14.4k

Countries citing papers authored by Klaus K. Unger

Since Specialization

Citations

This map shows the geographic impact of Klaus K. Unger's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Klaus K. Unger with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Klaus K. Unger more than expected).

Fields of papers citing papers by Klaus K. Unger

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Klaus K. Unger. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Klaus K. Unger. The network helps show where Klaus K. Unger may publish in the future.

Co-authorship network of co-authors of Klaus K. Unger

This figure shows the co-authorship network connecting the top 25 collaborators of Klaus K. Unger. A scholar is included among the top collaborators of Klaus K. Unger based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Klaus K. Unger. Klaus K. Unger is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Unger, Klaus K., Reinhard Ditz, Egidijus Machtejevas, & Romas Skudas. (2010). Liquid Chromatography—Its Development and Key Role in Life Science Applications. Angewandte Chemie International Edition. 49(13). 2300–2312. 49 indexed citations

Machtejevas, Egidijus, et al.. (2006). Selective protein removal and desalting using microchip CE. Journal of Chromatography B. 839(1-2). 68–73. 12 indexed citations

Machtejevas, Egidijus, et al.. (2006). Sulphonic acid strong cation-exchange restricted access columns in sample cleanup for profiling of endogeneous peptides in multidimensional liquid chromatography. Journal of Chromatography A. 1123(1). 38–46. 15 indexed citations

Machtejevas, Egidijus, et al.. (2003). Enrichment of proteinaceous materials on a strong cation-exchange diol silica restricted access material: protein–protein displacement and interaction effects. Journal of Chromatography A. 1025(2). 209–216. 21 indexed citations

Unger, Klaus K., et al.. (2000). Characterisation of porous solids V : proceedings of the 5th International Symposium on the Characterisation of Porous Solids (COPS-V), Heidelberg, Germany, May 30-June 2, 1999. Elsevier eBooks. 3 indexed citations

Unger, Klaus K., D. Kumar, M. Grün, et al.. (2000). Synthesis of spherical porous silicas in the micron and submicron size range: challenges and opportunities for miniaturized high-resolution chromatographic and electrokinetic separations. Journal of Chromatography A. 892(1-2). 47–55. 161 indexed citations

Unger, Klaus K., Peter Myers, & Milton T. W. Hearn. (1997). Standardized reversed-phase materials : Myth or reality?. 29(24). 22–28. 1 indexed citations

Unger, Klaus K., et al.. (1996). Proteolytic cleavage of soybean Bowman-Birk inhibitor monitored by means of high-performance capillary electrophoresis. Implications for the mechanism of proteinase inhibitors. Journal of Biochemical and Biophysical Methods. 33(3). 171–185. 11 indexed citations

Ravikovitch, Peter I., et al.. (1995). Capillary Hysteresis in Nanopores: Theoretical and Experimental Studies of Nitrogen Adsorption on MCM-41. Langmuir. 11(12). 4765–4772. 400 indexed citations

10.

Tanaka, Nobuo, Tetsuya Tanigawa, Ken Hosoya, et al.. (1995). Structural selectivity provided by starburst dendrimers as pseudostationary phase in electrokinetic chromatography. Journal of Chromatography A. 699(1-2). 331–341. 57 indexed citations

11.

Vidal‐Madjar, Claire, et al.. (1995). Study of conformational effects of recombinant interferon γ adsorbed on a non-porous reversed-phase silica support. Journal of Chromatography B Biomedical Sciences and Applications. 664(1). 155–161. 14 indexed citations

12.

Neimark, Alexander V. & Klaus K. Unger. (1993). Method of Discrimination of Surface Fractality. Journal of Colloid and Interface Science. 158(2). 412–419. 72 indexed citations

13.

Kurganov, A. A., В. А. Даванков, & Klaus K. Unger. (1991). Ion-exchange high-performance liquid chromatography of nucleotides and polypeptides on new types of ion-exchange sorbents, based on polystyrene-coated silicas. Journal of Chromatography A. 548(1-2). 207–214. 13 indexed citations

14.

Kraak, J.C., et al.. (1989). Hydrodynamic chromatography of macromolecules on 2 μm non-porous spherical silica gel packings. Chromatographia. 27(11-12). 585–590. 16 indexed citations

15.

Liapis, A.I., et al.. (1989). Biospecific adsorption of lysozyme onto monoclonal antibody ligand immobilized on nonporous silica particles. Biotechnology and Bioengineering. 34(4). 467–477. 39 indexed citations

16.

Tißler, Arno, et al.. (1988). Synthetische Zeolithe und Aluminophosphate. Nachrichten aus Chemie Technik und Laboratorium. 36(6). 624–630. 7 indexed citations

17.

Janzen, R., Klaus K. Unger, Herbert Giesche, Joachim N. Kinkel, & Milton T.W. Hearn. (1987). Evaluation of advanced silica packings for the separation of biopolymers by high-perforamnce liquid chromatography. Journal of Chromatography A. 397. 91–97. 64 indexed citations

18.

Unger, Klaus K., et al.. (1984). Optimum support properties for protein separations by high-performance size exclusion chromatography. Journal of Pharmaceutical and Biomedical Analysis. 2(2). 139–151. 12 indexed citations

19.

Unger, Klaus K., et al.. (1978). Comparative study of the performance of spherical and angular silica and alumina supports in the 1-10-μm size range. Journal of Chromatography A. 149. 1–12. 59 indexed citations

20.

Unger, Klaus K., et al.. (1976). Controlled porosity silica supports from hydrolytic polycondensation reaction of poly (ethoxysiloxane). Journal of Colloid and Interface Science. 55(2). 377–380. 29 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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