James M. Ngaruiya

781 total citations
24 papers, 662 citations indexed

About

James M. Ngaruiya is a scholar working on Materials Chemistry, Electrical and Electronic Engineering and Mechanics of Materials. According to data from OpenAlex, James M. Ngaruiya has authored 24 papers receiving a total of 662 indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Materials Chemistry, 14 papers in Electrical and Electronic Engineering and 6 papers in Mechanics of Materials. Recurrent topics in James M. Ngaruiya's work include ZnO doping and properties (10 papers), Semiconductor materials and devices (8 papers) and Metal and Thin Film Mechanics (6 papers). James M. Ngaruiya is often cited by papers focused on ZnO doping and properties (10 papers), Semiconductor materials and devices (8 papers) and Metal and Thin Film Mechanics (6 papers). James M. Ngaruiya collaborates with scholars based in Kenya, Germany and South Africa. James M. Ngaruiya's co-authors include Matthias Wuttig, Oliver Kappertz, S. H. Mohamed, R. Drese, Selvaraj Venkataraj, T. P. Leervad Pedersen, O.M. Ntwaeaborwa, H.C. Swart, D. Severin and J.J. Terblans and has published in prestigious journals such as Applied Physics Letters, Journal of Applied Physics and Renewable Energy.

In The Last Decade

James M. Ngaruiya

24 papers receiving 648 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
James M. Ngaruiya Kenya 15 464 419 141 132 85 24 662
P.X. Yan China 13 571 1.2× 306 0.7× 229 1.6× 37 0.3× 58 0.7× 21 736
E. Kusior Poland 13 330 0.7× 238 0.6× 140 1.0× 61 0.5× 124 1.5× 26 518
Thomas Kups Germany 16 353 0.8× 256 0.6× 76 0.5× 41 0.3× 54 0.6× 44 574
L. Imhoff France 17 527 1.1× 344 0.8× 286 2.0× 46 0.3× 187 2.2× 55 775
S.-B. Lee South Korea 10 291 0.6× 254 0.6× 56 0.4× 52 0.4× 38 0.4× 15 462
J.M. Chappé France 16 433 0.9× 319 0.8× 348 2.5× 32 0.2× 55 0.6× 23 641
Artur Wiatrowski Poland 10 248 0.5× 214 0.5× 149 1.1× 47 0.4× 53 0.6× 35 399
Volkan Şenay Türkiye 15 439 0.9× 363 0.9× 122 0.9× 81 0.6× 29 0.3× 54 657
Maziar Shakerzadeh Singapore 13 384 0.8× 210 0.5× 130 0.9× 45 0.3× 26 0.3× 35 618
Richard Dolbec Canada 13 360 0.8× 412 1.0× 42 0.3× 128 1.0× 30 0.4× 23 582

Countries citing papers authored by James M. Ngaruiya

Since Specialization
Citations

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

Fields of papers citing papers by James M. Ngaruiya

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by James M. Ngaruiya. 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 James M. Ngaruiya. The network helps show where James M. Ngaruiya may publish in the future.

Co-authorship network of co-authors of James M. Ngaruiya

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

All Works

20 of 20 papers shown
1.
Ngaruiya, James M., et al.. (2022). Synergistic power conversion efficiency contribution of counter electrode components in Dye Sensitized Solar Cells. Optical Materials. 131. 112667–112667. 1 indexed citations
2.
Ngaruiya, James M., et al.. (2021). Correlation of Bond Energy and Optical Band Energy of Annealed TiO2 Thin Films. American Journal of Educational Research. 9(1). 1–5. 1 indexed citations
3.
4.
5.
Ngaruiya, James M., et al.. (2019). Multiple plasmon resonances in small-sized citrate reduced gold nanoparticles. Materials Chemistry and Physics. 233. 263–266. 13 indexed citations
6.
Ngaruiya, James M., et al.. (2018). Effect of Annealing Rates on Surface Roughness of TiO2 Thin films. 6(2). 43–46. 3 indexed citations
7.
Ngaruiya, James M., et al.. (2016). Optical and Electrical Characterization of CuO Thin Films as Absorber Material for Solar Cell Applications. 6(1). 1–6. 15 indexed citations
8.
Ngaruiya, James M., et al.. (2016). Optical and Electrical Characterization of ZnS:Sn Thin Films for Solar Cell Application. Kenyatta University Institutional Repository (Kenyatta University). 6(1). 1–6. 19 indexed citations
9.
Ngaruiya, James M., et al.. (2015). Graphene Supported Platinum Counter Electrode for Dye Sensitized Solar Cells. International Journal of Innovative Research in Science Engineering and Technology. 4(12). 12251–12258. 4 indexed citations
10.
Ngaruiya, James M., et al.. (2013). Determination of wind energy potential in the Mwingi-Kitui plateau of Kenya. Renewable Energy. 63. 18–22. 25 indexed citations
11.
Dhlamini, M.S., O.M. Ntwaeaborwa, H.C. Swart, James M. Ngaruiya, & K.T. Hillie. (2009). Sensitized luminescence through nanoscopic effects of ZnO encapsulated in SiO2:Tb3+ sol gel derived phosphor. Physica B Condensed Matter. 404(22). 4406–4410. 17 indexed citations
12.
Dhlamini, M.S., J.J. Terblans, R.E. Kroon, et al.. (2008). Photoluminescence properties of SiO2 surface-passivated PbS nanoparticles. South African Journal of Science. 104. 398–400. 7 indexed citations
13.
Ngaruiya, James M., et al.. (2008). Resolution of Eu2+ asymmetrical emission peak of SrAl2O4:Eu2+, Dy3+ phosphor by cathodoluminescence measurements. Materials Letters. 62(17-18). 3192–3194. 47 indexed citations
14.
Dhlamini, M.S., J.J. Terblans, O.M. Ntwaeaborwa, et al.. (2008). Photoluminescence properties of powder and pulsed laser-deposited PbS nanoparticles in SiO2. Journal of Luminescence. 128(12). 1997–2003. 22 indexed citations
15.
Venkataraj, Selvaraj, D. Severin, S. H. Mohamed, et al.. (2005). Towards understanding the superior properties of transition metal oxynitrides prepared by reactive DC magnetron sputtering. Thin Solid Films. 502(1-2). 228–234. 94 indexed citations
16.
Ngaruiya, James M., et al.. (2004). Composition and formation mechanism of zirconium oxynitride films produced by reactive direct current magnetron sputtering. physica status solidi (a). 201(5). 967–976. 20 indexed citations
17.
Ngaruiya, James M., Oliver Kappertz, S. H. Mohamed, & Matthias Wuttig. (2004). Structure formation upon reactive direct current magnetron sputteringof transition metal oxide films. Applied Physics Letters. 85(5). 748–750. 65 indexed citations
18.
Mohamed, S. H., Oliver Kappertz, James M. Ngaruiya, et al.. (2003). Correlation between structure, stress and optical properties in direct current sputtered molybdenum oxide films. Thin Solid Films. 429(1-2). 135–143. 85 indexed citations
19.
Liu, Xiangdong, S. H. Mohamed, James M. Ngaruiya, Matthias Wuttig, & Thomas Michely. (2003). Modifying the growth of organic thin films by a self-assembled monolayer. Journal of Applied Physics. 93(8). 4852–4855. 22 indexed citations
20.
Mohamed, S. H., Oliver Kappertz, James M. Ngaruiya, et al.. (2003). Influence of nitrogen content on properties of direct current sputtered TiOxNy films. physica status solidi (a). 201(1). 90–102. 86 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by P.X. Yan Breakdown of academic impact, for papers by E. Kusior Breakdown of academic impact, for papers by Thomas Kups Breakdown of academic impact, for papers by L. Imhoff Breakdown of academic impact, for papers by S.-B. Lee Breakdown of academic impact, for papers by J.M. Chappé Breakdown of academic impact, for papers by Artur Wiatrowski Breakdown of academic impact, for papers by Volkan Şenay Breakdown of academic impact, for papers by Maziar Shakerzadeh Breakdown of academic impact, for papers by Richard Dolbec
Rankless by CCL
2026