Omar Hadjar

917 total citations
27 papers, 785 citations indexed

About

Omar Hadjar is a scholar working on Spectroscopy, Computational Mechanics and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Omar Hadjar has authored 27 papers receiving a total of 785 indexed citations (citations by other indexed papers that have themselves been cited), including 17 papers in Spectroscopy, 15 papers in Computational Mechanics and 11 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Omar Hadjar's work include Mass Spectrometry Techniques and Applications (17 papers), Ion-surface interactions and analysis (15 papers) and Atomic and Molecular Physics (9 papers). Omar Hadjar is often cited by papers focused on Mass Spectrometry Techniques and Applications (17 papers), Ion-surface interactions and analysis (15 papers) and Atomic and Molecular Physics (9 papers). Omar Hadjar collaborates with scholars based in United States, Netherlands and Italy. Omar Hadjar's co-authors include Julia Laskin, Peng Wang, Thomas Schlathölter, R. Hoekstra, Jean H. Futrell, R. Morgenstern, Paul L. Gassman, Grant E. Johnson, Peng Wang and R. Graham Cooks and has published in prestigious journals such as Journal of the American Chemical Society, Physical Review Letters and The Journal of Chemical Physics.

In The Last Decade

Omar Hadjar

27 papers receiving 775 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Omar Hadjar United States 17 409 346 294 183 181 27 785
Steven J. Pachuta United States 14 395 1.0× 283 0.8× 139 0.5× 213 1.2× 158 0.9× 19 774
Karsten Reihs Germany 14 273 0.7× 117 0.3× 288 1.0× 148 0.8× 142 0.8× 25 880
Styliani Consta Canada 18 633 1.5× 181 0.5× 307 1.0× 419 2.3× 91 0.5× 57 936
Keijiro Ohshimo Japan 17 388 0.9× 97 0.3× 419 1.4× 66 0.4× 294 1.6× 77 862
Joshua T. Maze United States 10 351 0.9× 167 0.5× 91 0.3× 93 0.5× 121 0.7× 10 624
Stephen A. Ruatta United States 9 193 0.5× 199 0.6× 216 0.7× 66 0.4× 324 1.8× 10 595
T. Sekitani Japan 19 177 0.4× 144 0.4× 393 1.3× 221 1.2× 213 1.2× 44 720
Donna M. Cyr United States 13 122 0.3× 60 0.2× 555 1.9× 372 2.0× 223 1.2× 17 900
P. Potzinger Germany 17 225 0.6× 79 0.2× 401 1.4× 265 1.4× 267 1.5× 54 860
Tissa C. Gunaratne United States 12 239 0.6× 105 0.3× 258 0.9× 67 0.4× 123 0.7× 24 568

Countries citing papers authored by Omar Hadjar

Since Specialization
Citations

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

Fields of papers citing papers by Omar Hadjar

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Omar Hadjar

This figure shows the co-authorship network connecting the top 25 collaborators of Omar Hadjar. A scholar is included among the top collaborators of Omar Hadjar 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 Omar Hadjar. Omar Hadjar 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.
Hadjar, Omar, et al.. (2013). Ion Profiling in an Ambient Drift Tube-Ion Mobility Spectrometer Using a High Pixel Density Linear Array Detector IonCCD. Analytical Chemistry. 85(14). 6716–6722. 8 indexed citations
2.
Hadjar, Omar & William K. Fowler. (2012). High-efficiency cross-beam magnetic electron-impact source for improved miniature Mattauch-Herzog mass spectrometer performance. Review of Scientific Instruments. 83(6). 6 indexed citations
3.
Hadjar, Omar, et al.. (2011). Preliminary Demonstration of an IonCCD as an Alternative Pixelated Anode for Direct MCP Readout in a Compact MS-Based Detector. Journal of the American Society for Mass Spectrometry. 23(2). 418–424. 12 indexed citations
4.
Hadjar, Omar, et al.. (2011). IonCCD Detector for Miniature Sector-Field Mass Spectrometer: Investigation of Peak Shape and Detector Surface Artifacts Induced by keV Ion Detection. Journal of the American Society for Mass Spectrometry. 22(10). 1872–84. 10 indexed citations
5.
Peng, Wen‐Ping, Grant E. Johnson, Peng Wang, et al.. (2010). Redox chemistry in thin layers of organometallic complexes prepared using ion soft landing. Physical Chemistry Chemical Physics. 13(1). 267–275. 34 indexed citations
6.
Hadjar, Omar, Peng Wang, Jean H. Futrell, & Julia Laskin. (2009). Effect of the surface on charge reduction and desorption kinetics of soft landed peptide ions. Journal of the American Society for Mass Spectrometry. 20(6). 901–906. 26 indexed citations
7.
Wang, Peng, Omar Hadjar, Paul L. Gassman, & Julia Laskin. (2008). Reactive landing of peptide ions on self-assembled monolayer surfaces: an alternative approach for covalent immobilization of peptides on surfaces. Physical Chemistry Chemical Physics. 10(11). 1512–1512. 73 indexed citations
8.
Wang, Peng, Omar Hadjar, & Julia Laskin. (2007). Covalent Immobilization of Peptides on Self-Assembled Monolayer Surfaces Using Soft-Landing of Mass-Selected Ions. Journal of the American Chemical Society. 129(28). 8682–8683. 55 indexed citations
9.
Hadjar, Omar, Jean H. Futrell, Zihua Zhu, et al.. (2007). Design and Performance of an Instrument for Soft Landing of Biomolecular Ions on Surfaces. Analytical Chemistry. 79(17). 6566–6574. 51 indexed citations
10.
Laskin, Julia, Peng Wang, & Omar Hadjar. (2007). Soft-landing of peptide ions onto self-assembled monolayer surfaces: an overview. Physical Chemistry Chemical Physics. 10(8). 1079–1090. 99 indexed citations
11.
Hadjar, Omar, Jean H. Futrell, & Julia Laskin. (2007). First Observation of Charge Reduction and Desorption Kinetics of Multiply Protonated Peptides Soft Landed onto Self-Assembled Monolayer Surfaces. The Journal of Physical Chemistry C. 111(49). 18220–18225. 38 indexed citations
12.
Laskin, Julia, Peng Wang, Omar Hadjar, et al.. (2007). Charge retention by peptide ions soft-landed onto self-assembled monolayer surfaces. International Journal of Mass Spectrometry. 265(2-3). 237–243. 31 indexed citations
13.
Ascenzi, Daniela, Davide Bassi, Pietro Franceschi, et al.. (2004). Reactivity of C10H7+ and C10D7+ with H2 and D2. The Journal of Chemical Physics. 121(14). 6728–6737. 18 indexed citations
14.
Schlathölter, Thomas, et al.. (2001). Electronic stopping in ion–fullerene collisions. Applied Physics A. 72(3). 281–287. 9 indexed citations
15.
Schlathölter, Thomas, Omar Hadjar, Jordy de Vries, R. Hoekstra, & R. Morgenstern. (2001). PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS. 19 indexed citations
16.
Hadjar, Omar, R. Hoekstra, R. Morgenstern, & Thomas Schlathölter. (2001). Projectile atomic-number effect on ion-induced fragmentation and ionization of fullerenes. Physical Review A. 63(3). 40 indexed citations
17.
Schlathölter, Thomas, et al.. (1999). Electronic versus vibrational excitation in Heq+ collisions with fullerenes. International Journal of Mass Spectrometry. 192(1-3). 245–257. 27 indexed citations
18.
Olson, R. E., R. D. DuBois, Thomas Schlathölter, et al.. (1999). Five-body calculations ofD2fragmentation byXe19+impact. Physical Review A. 60(3). 2112–2117. 11 indexed citations
19.
Schlathölter, Thomas, et al.. (1999). Strong Velocity Effects in Collisions ofHe+with Fullerenes. Physical Review Letters. 82(1). 73–76. 67 indexed citations
20.
Hadjar, Omar, et al.. (1999). Experimental Study of the Excitation Mechanisms in Heq+-Fullerene Collisions. Physica Scripta. T80(B). 207–207. 1 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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