Sami Kaappa

1.9k total citations · 1 hit paper
20 papers, 1.4k citations indexed

About

Sami Kaappa is a scholar working on Materials Chemistry, Electronic, Optical and Magnetic Materials and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Sami Kaappa has authored 20 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Materials Chemistry, 9 papers in Electronic, Optical and Magnetic Materials and 4 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Sami Kaappa's work include Nanocluster Synthesis and Applications (10 papers), Gold and Silver Nanoparticles Synthesis and Applications (5 papers) and Machine Learning in Materials Science (5 papers). Sami Kaappa is often cited by papers focused on Nanocluster Synthesis and Applications (10 papers), Gold and Silver Nanoparticles Synthesis and Applications (5 papers) and Machine Learning in Materials Science (5 papers). Sami Kaappa collaborates with scholars based in Finland, Denmark and China. Sami Kaappa's co-authors include Sami Malola, Hannu Häkkinen, Tatsuya Tsukuda, Shinjiro Takano, Mina R. Narouz, Cathleen M. Crudden, Nanfeng Zheng, Boon K. Teo, Guocheng Deng and J. Hugh Horton and has published in prestigious journals such as Journal of the American Chemical Society, Physical Review Letters and Angewandte Chemie International Edition.

In The Last Decade

Sami Kaappa

19 papers receiving 1.4k 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.

N-heterocyclic carbene-functionalized magic-number gold nanoclusters

2019 420 citations Mina R. Narouz, Kimberly M. Osten et al. Nature Chemistry profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Sami Kaappa Finland	13	1.2k	641	271	154	138	20	1.4k
Ying‐Zi Han China	17	897 0.7×	447 0.7×	166 0.6×	209 1.4×	88 0.6×	28	1.1k
Atanu Ghosh India	26	2.2k 1.8×	1.3k 2.1×	184 0.7×	214 1.4×	113 0.8×	38	2.3k
Wen Wu Xu China	22	1.8k 1.4×	909 1.4×	122 0.5×	81 0.5×	112 0.8×	69	1.9k
Jinsong Chai China	27	1.9k 1.6×	1.0k 1.6×	117 0.4×	105 0.7×	159 1.2×	55	2.0k
Xiang‐Sha Du United States	19	2.1k 1.7×	995 1.6×	239 0.9×	348 2.3×	118 0.9×	27	2.3k
Tatsuya Higaki United States	25	2.8k 2.2×	1.6k 2.6×	169 0.6×	118 0.8×	216 1.6×	39	2.9k
Jishi Chen China	18	1.6k 1.3×	991 1.5×	71 0.3×	79 0.5×	79 0.6×	31	1.6k
Lars Gell Finland	12	1.3k 1.1×	864 1.3×	68 0.3×	76 0.5×	56 0.4×	16	1.4k
Yoshiki Niihori Japan	30	2.8k 2.3×	1.7k 2.6×	165 0.6×	108 0.7×	196 1.4×	61	3.0k
Papri Chakraborty India	23	1.3k 1.1×	849 1.3×	138 0.5×	105 0.7×	51 0.4×	46	1.4k

Countries citing papers authored by Sami Kaappa

Since Specialization

Citations

This map shows the geographic impact of Sami Kaappa'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 Sami Kaappa with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Sami Kaappa more than expected).

Fields of papers citing papers by Sami Kaappa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Sami Kaappa. 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 Sami Kaappa. The network helps show where Sami Kaappa may publish in the future.

Co-authorship network of co-authors of Sami Kaappa

This figure shows the co-authorship network connecting the top 25 collaborators of Sami Kaappa. A scholar is included among the top collaborators of Sami Kaappa 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 Sami Kaappa. Sami Kaappa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Kaappa, Sami, et al.. (2025). Global atomic structure optimization through machine-learning-enabled barrier circumvention in extra dimensions. npj Computational Materials. 11(1).

Honkanen, Mari, Sami Kaappa, Suvi Santa-aho, et al.. (2024). Magnetic domain wall dynamics studied by in-situ Lorentz microscopy with aid of custom-made Hall-effect sensor holder. Ultramicroscopy. 262. 113979–113979. 6 indexed citations

Kaappa, Sami, Suvi Santa-aho, Mari Honkanen, Minnamari Vippola, & Lasse Laurson. (2024). Magnetic domain walls interacting with dislocations in micromagnetic simulations. Communications Materials. 5(1). 2 indexed citations

Kaappa, Sami, et al.. (2023). Machine-learning-enabled optimization of atomic structures using atoms with fractional existence. Physical review. B.. 107(21). 5 indexed citations

Kaappa, Sami & Lasse Laurson. (2023). Barkhausen noise from formation of360∘domain walls in disordered permalloy thin films. Physical Review Research. 5(2). 10 indexed citations

Santa-aho, Suvi, Mari Honkanen, Sami Kaappa, et al.. (2023). Multi-instrumental approach to domain walls and their movement in ferromagnetic steels – Origin of Barkhausen noise studied by microscopy techniques. Materials & Design. 234. 112308–112308. 10 indexed citations

Kaappa, Sami, et al.. (2021). Atomic Structure Optimization with Machine-Learning Enabled Interpolation between Chemical Elements. Physical Review Letters. 127(16). 166001–166001. 17 indexed citations

Kaappa, Sami, et al.. (2021). Global optimization of atomic structures with gradient-enhanced Gaussian process regression. Physical review. B.. 103(17). 31 indexed citations

Kaappa, Sami, et al.. (2020). Machine learning with bond information for local structure optimizations in surface science. Technical University of Denmark, DTU Orbit (Technical University of Denmark, DTU). 12 indexed citations

10.

Narouz, Mina R., Shinjiro Takano, Paul A. Lummis, et al.. (2019). Robust, Highly Luminescent Au₁₃ Superatoms Protected by N-Heterocyclic Carbenes. Journal of the American Chemical Society. 141(38). 14997–15002. 240 indexed citations

11.

Shen, Hui, Guocheng Deng, Sami Kaappa, et al.. (2019). Highly Robust but Surface‐Active: An N‐Heterocyclic Carbene‐Stabilized Au ₂₅ Nanocluster. Angewandte Chemie International Edition. 58(49). 17731–17735. 160 indexed citations

12.

Narouz, Mina R., Kimberly M. Osten, Phillip J. Unsworth, et al.. (2019). N-heterocyclic carbene-functionalized magic-number gold nanoclusters. Nature Chemistry. 11(5). 419–425. 420 indexed citations breakdown →

13.

Malola, Sami, Sami Kaappa, & Hannu Häkkinen. (2019). Role of Nanocrystal Symmetry in the Crossover Region from Molecular to Metallic Gold Nanoparticles. The Journal of Physical Chemistry C. 123(33). 20655–20663. 22 indexed citations

14.

Sun, Cunfa, Nisha Mammen, Sami Kaappa, et al.. (2019). Atomically Precise, Thiolated Copper–Hydride Nanoclusters as Single-Site Hydrogenation Catalysts for Ketones in Mild Conditions. ACS Nano. 13(5). 5975–5986. 175 indexed citations

15.

Shen, Hui, Guocheng Deng, Sami Kaappa, et al.. (2019). Highly Robust but Surface‐Active: An N‐Heterocyclic Carbene‐Stabilized Au₂₅ Nanocluster. Angewandte Chemie. 131(49). 17895–17899. 44 indexed citations

16.

Zhou, Qin, Sami Kaappa, Sami Malola, et al.. (2018). Real-space imaging with pattern recognition of a ligand-protected Ag374 nanocluster at sub-molecular resolution. Nature Communications. 9(1). 2948–2948. 36 indexed citations

17.

Kaappa, Sami, Sami Malola, & Hannu Häkkinen. (2018). Point Group Symmetry Analysis of the Electronic Structure of Bare and Protected Metal Nanocrystals. The Journal of Physical Chemistry A. 122(43). 8576–8584. 20 indexed citations

18.

Slaughter, Liane S., Kevin M. Cheung, Sami Kaappa, et al.. (2017). Patterning of supported gold monolayers via chemical lift-off lithography. Beilstein Journal of Nanotechnology. 8. 2648–2661. 16 indexed citations

19.

Alhilaly, Mohammad J., Megalamane S. Bootharaju, Chakra P. Joshi, et al.. (2016). [Ag₆₇(SPhMe₂)₃₂(PPh₃)₈]³⁺: Synthesis, Total Structure, and Optical Properties of a Large Box-Shaped Silver Nanocluster. Journal of the American Chemical Society. 138(44). 14727–14732. 170 indexed citations

20.

Juarez‐Mosqueda, Rosalba, Sami Kaappa, Sami Malola, & Hannu Häkkinen. (2016). Analysis of the Electronic Structure of Non-Spherical Ligand-Protected Metal Nanoclusters: The Case of a Box-Like Ag₆₇. The Journal of Physical Chemistry C. 121(20). 10698–10705. 12 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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