Zachary R. Stephen

3.2k total citations · 1 hit paper
36 papers, 2.6k citations indexed

About

Zachary R. Stephen is a scholar working on Biomaterials, Biomedical Engineering and Molecular Biology. According to data from OpenAlex, Zachary R. Stephen has authored 36 papers receiving a total of 2.6k indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Biomaterials, 20 papers in Biomedical Engineering and 12 papers in Molecular Biology. Recurrent topics in Zachary R. Stephen's work include Nanoparticle-Based Drug Delivery (23 papers), RNA Interference and Gene Delivery (9 papers) and Nanoplatforms for cancer theranostics (9 papers). Zachary R. Stephen is often cited by papers focused on Nanoparticle-Based Drug Delivery (23 papers), RNA Interference and Gene Delivery (9 papers) and Nanoplatforms for cancer theranostics (9 papers). Zachary R. Stephen collaborates with scholars based in United States, China and Taiwan. Zachary R. Stephen's co-authors include Miqin Zhang, Forrest M. Kievit, Mike Jeon, Fang Chen, Omid Veiseh, Richard G. Ellenbogen, Richard A. Revia, Kui Wang, Conroy Sun and Qingxin Mu and has published in prestigious journals such as Advanced Materials, Accounts of Chemical Research and ACS Nano.

In The Last Decade

Zachary R. Stephen

34 papers receiving 2.5k 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.

Iron Oxide Nanoparticles as T₁ Contrast Agents for Magnetic Resonance Imaging: Fundamentals, Challenges, Applications, and Prospectives

2020 348 citations Mike Jeon, Zachary R. Stephen et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Zachary R. Stephen United States	25	1.4k	1.4k	744	625	200	36	2.6k
Chunfu Zhang China	34	1.7k 1.2×	1.2k 0.8×	827 1.1×	765 1.2×	196 1.0×	78	2.9k
Zipeng Zhen United States	23	1.8k 1.2×	1.0k 0.7×	858 1.2×	1.5k 2.4×	104 0.5×	29	3.4k
Linfeng Zheng China	22	1.2k 0.9×	1.3k 0.9×	715 1.0×	783 1.3×	129 0.6×	49	2.7k
Prashant Chandrasekharan Singapore	26	1.7k 1.2×	786 0.6×	882 1.2×	549 0.9×	146 0.7×	47	2.4k
Heather Kalish United States	18	855 0.6×	672 0.5×	594 0.8×	446 0.7×	71 0.4×	34	2.1k
Jonghoon Kim South Korea	20	1.4k 1.0×	594 0.4×	814 1.1×	1.7k 2.7×	198 1.0×	31	3.3k
Xiao Fu China	22	1.4k 1.0×	791 0.6×	873 1.2×	765 1.2×	56 0.3×	60	2.6k
Shun Shen China	38	2.7k 1.9×	1.8k 1.2×	1.3k 1.8×	1.3k 2.0×	102 0.5×	76	4.3k
Tzu‐yin Lin United States	26	1.3k 0.9×	682 0.5×	748 1.0×	643 1.0×	87 0.4×	80	2.4k
Michal Babič Czechia	20	787 0.5×	737 0.5×	409 0.5×	496 0.8×	163 0.8×	47	1.8k

Countries citing papers authored by Zachary R. Stephen

Since Specialization

Citations

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

Fields of papers citing papers by Zachary R. Stephen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Zachary R. Stephen. 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 Zachary R. Stephen. The network helps show where Zachary R. Stephen may publish in the future.

Co-authorship network of co-authors of Zachary R. Stephen

This figure shows the co-authorship network connecting the top 25 collaborators of Zachary R. Stephen. A scholar is included among the top collaborators of Zachary R. Stephen 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 Zachary R. Stephen. Zachary R. Stephen 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

Flexner, Charles, et al.. (2025). Long-acting Injectable Containing Lopinavir Eliminates Reliance on Ritonavir Pharmacokinetic Enhancement. The Journal of Infectious Diseases. 232(3). 607–611.

Stephen, Zachary R., Mark L. Ryan, Xiaolin Xu, et al.. (2025). The Promises and Prospects of Long-Acting Therapeutics for Treatment and Prevention of Infectious Diseases. The Annual Review of Pharmacology and Toxicology. 66(1). 87–112.

Stephen, Zachary R., et al.. (2023). A novel formulation enabled transformation of 3-HIV drugs tenofovir–lamivudine–dolutegravir from short-acting to long-acting all-in-one injectable. AIDS. 37(14). 2131–2136. 5 indexed citations

Mu, Qingxin, Guanyou Lin, Zachary R. Stephen, et al.. (2020). In vivo serum enabled production of ultrafine nanotherapeutics for cancer treatment. Materials Today. 38. 10–23. 12 indexed citations

Wang, Kui, Forrest M. Kievit, Peter A. Chiarelli, et al.. (2020). siRNA Nanoparticle Suppresses Drug‐Resistant Gene and Prolongs Survival in an Orthotopic Glioblastoma Xenograft Mouse Model. Advanced Functional Materials. 31(6). 39 indexed citations

Jeon, Mike, Guanyou Lin, Zachary R. Stephen, et al.. (2020). Cocaine analogue conjugated magnetic nanoparticles for labeling and imaging dopaminergic neurons. Biomaterials Science. 8(15). 4166–4175. 3 indexed citations

Stephen, Zachary R. & Miqin Zhang. (2020). Recent Progress in the Synergistic Combination of Nanoparticle‐Mediated Hyperthermia and Immunotherapy for Treatment of Cancer. Advanced Healthcare Materials. 10(2). e2001415–e2001415. 52 indexed citations

Stephen, Zachary R., Peter A. Chiarelli, Richard A. Revia, et al.. (2019). Time-Resolved MRI Assessment of Convection-Enhanced Delivery by Targeted and Nontargeted Nanoparticles in a Human Glioblastoma Mouse Model. Cancer Research. 79(18). 4776–4786. 32 indexed citations

Revia, Richard A., Zachary R. Stephen, & Miqin Zhang. (2019). Theranostic Nanoparticles for RNA-Based Cancer Treatment. Accounts of Chemical Research. 52(6). 1496–1506. 139 indexed citations

10.

Jeon, Mike, et al.. (2019). Paclitaxel‐Loaded Iron Oxide Nanoparticles for Targeted Breast Cancer Therapy. Advanced Therapeutics. 2(12). 33 indexed citations

11.

Stephen, Zachary R., et al.. (2019). Catalase‐Functionalized Iron Oxide Nanoparticles Reverse Hypoxia‐Induced Chemotherapeutic Resistance. Advanced Healthcare Materials. 8(20). e1900826–e1900826. 29 indexed citations

12.

Wang, Hui, Kui Wang, Qingxin Mu, et al.. (2016). Mesoporous carbon nanoshells for high hydrophobic drug loading, multimodal optical imaging, controlled drug release, and synergistic therapy. Nanoscale. 9(4). 1434–1442. 32 indexed citations

13.

Stephen, Zachary R., et al.. (2016). Approach to Rapid Synthesis and Functionalization of Iron Oxide Nanoparticles for High Gene Transfection. ACS Applied Materials & Interfaces. 8(10). 6320–6328. 55 indexed citations

14.

Kievit, Forrest M., Zachary R. Stephen, Kui Wang, et al.. (2015). Nanoparticle mediated silencing of DNA repair sensitizes pediatric brain tumor cells to γ‐irradiation. Molecular Oncology. 9(6). 1071–1080. 53 indexed citations

15.

Wang, Kui, Forrest M. Kievit, Jonathan G. Sham, et al.. (2015). Iron-Oxide-Based Nanovector for Tumor Targeted siRNA Delivery in an Orthotopic Hepatocellular Carcinoma Xenograft Mouse Model. Small. 12(4). 477–487. 63 indexed citations

16.

Wang, Tingzhong, Forrest M. Kievit, Omid Veiseh, et al.. (2013). Targeted Cell Uptake of a Noninternalizing Antibody Through Conjugation to Iron Oxide Nanoparticles in Primary Central Nervous System Lymphoma. World Neurosurgery. 80(1-2). 134–141. 23 indexed citations

17.

Chen, Fang, Forrest M. Kievit, Omid Veiseh, et al.. (2012). Fabrication of magnetic nanoparticles with controllable drug loading and release through a simple assembly approach. Journal of Controlled Release. 162(1). 233–241. 82 indexed citations

18.

Stephen, Zachary R., Forrest M. Kievit, & Miqin Zhang. (2011). Magnetite nanoparticles for medical MR imaging. Materials Today. 14(7-8). 330–338. 356 indexed citations

19.

Park, James O., Zachary R. Stephen, Conroy Sun, et al.. (2011). Glypican-3 Targeting of Liver Cancer Cells Using Multifunctional Nanoparticles. Molecular Imaging. 10(1). 37 indexed citations

20.

Sun, Conroy, Fang Chen, Zachary R. Stephen, et al.. (2008). Tumor-Targeted Drug Delivery and MRI Contrast Enhancement by Chlorotoxin-Conjugated Iron Oxide Nanoparticles. Nanomedicine. 3(4). 495–505. 166 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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