Ikurou Umezu

3.7k total citations · 1 hit paper
87 papers, 3.0k citations indexed

About

Ikurou Umezu is a scholar working on Materials Chemistry, Electrical and Electronic Engineering and Biomedical Engineering. According to data from OpenAlex, Ikurou Umezu has authored 87 papers receiving a total of 3.0k indexed citations (citations by other indexed papers that have themselves been cited), including 66 papers in Materials Chemistry, 46 papers in Electrical and Electronic Engineering and 28 papers in Biomedical Engineering. Recurrent topics in Ikurou Umezu's work include Silicon Nanostructures and Photoluminescence (38 papers), Thin-Film Transistor Technologies (23 papers) and Ion-surface interactions and analysis (14 papers). Ikurou Umezu is often cited by papers focused on Silicon Nanostructures and Photoluminescence (38 papers), Thin-Film Transistor Technologies (23 papers) and Ion-surface interactions and analysis (14 papers). Ikurou Umezu collaborates with scholars based in Japan, Australia and United States. Ikurou Umezu's co-authors include Hiromichi Kataura, Y. Ohtsuka, Yutaka Maniwa, Yohji Achiba, Y. Kumazawa, Satoru Suzuki, Akira Sugimura, Keiji Maeda, Mitsuru Inada and Yuka Yamada and has published in prestigious journals such as Physical review. B, Condensed matter, Applied Physics Letters and Journal of Applied Physics.

In The Last Decade

Ikurou Umezu

86 papers receiving 3.0k citations

Hit Papers

1 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.

Optical properties of single-wall carbon nanotubes

1999 2.0k citations Ikurou Umezu et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Ikurou Umezu Japan	16	2.6k	922	911	726	382	87	3.0k
K. B. K. Teo United Kingdom	25	2.4k 0.9×	879 1.0×	779 0.9×	523 0.7×	168 0.4×	60	2.8k
Л. А. Чернозатонский Russia	31	3.5k 1.4×	822 0.9×	737 0.8×	623 0.9×	830 2.2×	204	3.9k
Michele Perego Italy	32	2.1k 0.8×	637 0.7×	2.0k 2.2×	503 0.7×	372 1.0×	155	3.2k
Nasreen G. Chopra United States	12	5.2k 2.0×	642 0.7×	762 0.8×	929 1.3×	630 1.6×	14	5.7k
T. Ichihashi Japan	25	2.7k 1.0×	686 0.7×	702 0.8×	350 0.5×	604 1.6×	42	3.4k
Frank Rohmund Sweden	20	2.2k 0.8×	660 0.7×	336 0.4×	533 0.7×	619 1.6×	30	2.6k
Ernst Richter Germany	24	4.1k 1.6×	1000 1.1×	1.0k 1.1×	1.3k 1.7×	683 1.8×	57	4.9k
H. Shimoda Japan	20	1.8k 0.7×	552 0.6×	627 0.7×	323 0.4×	411 1.1×	56	2.3k
Jiasai Xu United States	7	2.3k 0.9×	795 0.9×	447 0.5×	268 0.4×	259 0.7×	10	2.6k
N.L. Rupesinghe United Kingdom	18	2.0k 0.8×	620 0.7×	927 1.0×	286 0.4×	118 0.3×	51	2.6k

Countries citing papers authored by Ikurou Umezu

Since Specialization

Citations

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

Fields of papers citing papers by Ikurou Umezu

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ikurou Umezu

This figure shows the co-authorship network connecting the top 25 collaborators of Ikurou Umezu. A scholar is included among the top collaborators of Ikurou Umezu 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 Ikurou Umezu. Ikurou Umezu 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

Fukuoka, Hiroshi, et al.. (2018). Effect of counter shock wave on the expanding plume. Applied Physics A. 124(2). 2 indexed citations

Yoshida, Takehito, et al.. (2016). Pulsed-laser-deposited TiO2 nanocrystalline films supporting Au nanoparticles for visible-light-operating plasmonic photocatalysts. Applied Physics A. 122(5). 3 indexed citations

Inada, Mitsuru, Hiroshi Yamamoto, Ikurou Umezu, et al.. (2015). Crossover from Efros–Shklovskii variable range hopping to nearest-neighbor hopping in silicon nanocrystal random network. Applied Physics Express. 8(10). 105001–105001. 8 indexed citations

Yoshida, Takehito, et al.. (2014). Structural properties of TiO2 nanocrystallites condensed in vapor-phase for photocatalyst applications. Applied Physics A. 117(1). 223–227. 4 indexed citations

Umezu, Ikurou, Jeffrey M. Warrender, Supakit Charnvanichborikarn, et al.. (2013). Emergence of very broad infrared absorption band by hyperdoping of silicon with chalcogens. Journal of Applied Physics. 113(21). 70 indexed citations

Umezu, Ikurou, et al.. (2012). Effects of collision between two plumes on plume expansion dynamics during pulsed laser ablation in background gas. Applied Physics A. 110(3). 629–632. 7 indexed citations

Yoshida, Takehito, et al.. (2011). Synthesis of GaN nanocrystallites by pulsed laser ablation in pure nitrogen background gases. Applied Physics A. 104(3). 907–911. 6 indexed citations

Umezu, Ikurou, A Kohno, Jeffrey M. Warrender, et al.. (2011). Strong mid-infrared optical absorption by supersaturated sulfur doping in silicon. AIP conference proceedings. 51–52. 5 indexed citations

Lü, Wei, et al.. (2006). Resonance energy transfer based on shallow and deep energy levels of biotin-polyethylene glycol/polyamine stabilized CdS quantum dots. Applied Physics Letters. 89(14). 6 indexed citations

10.

Makino, Toshiharu, Mitsuru Inada, Ikurou Umezu, & Akira Sugimura. (2005). Structural and optical properties of surface-hydrogenated silicon nanocrystallites prepared by reactive pulsed laser ablation. Journal of Physics D Applied Physics. 38(18). 3507–3511. 14 indexed citations

11.

Umezu, Ikurou, et al.. (2003). Reaction between nitrogen gas and silicon species during pulsed laser ablation. Journal of Vacuum Science & Technology A Vacuum Surfaces and Films. 21(5). 1680–1682. 6 indexed citations

12.

Nakagawa, Hiroko, et al.. (2002). Effects of hydrogen on Si nanoparticles formed by pulsed laser ablation. Applied Surface Science. 197-198. 666–669. 15 indexed citations

13.

Inada, Mitsuru, Ikurou Umezu, & Akira Sugimura. (2002). Effect of gas pressure on reactive pulsed laser ablation of a silicon target. Journal of Vacuum Science & Technology A Vacuum Surfaces and Films. 21(1). 84–86. 8 indexed citations

14.

Umezu, Ikurou, Tomohiro Yamaguchi, Akira Sugimura, et al.. (2001). Effects of annealing on luminescence properties of Si nanocrystallites prepared by pulsed laser ablation in inert gas. Materials Science and Engineering C. 15(1-2). 129–131. 2 indexed citations

15.

Umezu, Ikurou, et al.. (1998). Effects of thermal processes on photoluminescence of silicon nanocrystallites prepared by pulsed laser ablation. Journal of Applied Physics. 84(11). 6448–6450. 19 indexed citations

16.

Umezu, Ikurou, et al.. (1998). Effect of plasma treatment on the density of defects at an amorphous Si:H-insulator interface. Journal of Applied Physics. 84(3). 1371–1377. 4 indexed citations

17.

Umezu, Ikurou, et al.. (1998). A study of interface state density between a-Si:H and insulating layer in terms of plasma surface reaction. Journal of Non-Crystalline Solids. 227-230. 1235–1239. 1 indexed citations

18.

Umezu, Ikurou, et al.. (1996). Investigation of interface state density between a-Si:H and insulating layers by ESR and photothermal deflection spectroscopy. Journal of Non-Crystalline Solids. 198-200. 778–781. 3 indexed citations

19.

Umezu, Ikurou, et al.. (1995). Effect of Plasma Damage on Interface State Density Between a-Si:H and Insulating Films. MRS Proceedings. 377. 2 indexed citations

20.

Sugiura, Chikara, et al.. (1988). Sulfur-K X-Ray Spectra and Electronic Structure of a Semiconductor Ag₂S. Japanese Journal of Applied Physics. 27(7R). 1216–1216. 37 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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