World's Best Scientists 2026 revealed!
John D. Brennan

John D. Brennan

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 69 6364 5777 168 151 246 13197

John D. Brennan publications per year

The chart shows the history of publications by John D. Brennan between 1989 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. John D. Brennan published across 37 years, from 1989 to 2025, averaging 7.9 papers a year. Output peaked at 22 publications in 2022. 8 of the 291 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1989 to 2025. Vertical axis: number of publications, 0 to 22. Peak 22 publications in 2022. 1989: 1 publication 1990: 3 publications 1991: 5 publications 1992: 2 publications 1993: 1 publication 1994: 5 publications 1995: 5 publications 1996: 1 publication 1997: 3 publications 1998: 8 publications 1999: 5 publications 2000: 5 publications 2001: 3 publications 2002: 8 publications 2003: 12 publications 2004: 12 publications 2005: 18 publications 2006: 17 publications 2007: 10 publications 2008: 6 publications 2009: 7 publications 2010: 5 publications 2011: 6 publications 2012: 7 publications 2013: 10 publications 2014: 20 publications 2015: 10 publications 2016: 12 publications 2017: 12 publications 2018: 8 publications 2019: 8 publications 2020: 10 publications 2021: 10 publications 2022: 22 publications 2023: 6 publications 2024: 3 publications 2025: 5 publications
1989 2025

291 publications in total across all disciplines

View publications per year as a table
John D. Brennan: publications per year, 1989 to 2025
Year Publications
1989 1
1990 3
1991 5
1992 2
1993 1
1994 5
1995 5
1996 1
1997 3
1998 8
1999 5
2000 5
2001 3
2002 8
2003 12
2004 12
2005 18
2006 17
2007 10
2008 6
2009 7
2010 5
2011 6
2012 7
2013 10
2014 20
2015 10
2016 12
2017 12
2018 8
2019 8
2020 10
2021 10
2022 22
2023 6
2024 3
2025 5
Total 291
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John D. Brennan publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where John D. Brennan sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 241–260 publications, is where this scientist sits. 61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61–80 publications 1,295+

This scientist: 246 publications — 48th percentile

48% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100 246
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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John D. Brennan D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where John D. Brennan sits on this spectrum.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 68–69 D-Index, is where this scientist sits. 40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40–41 D-Index 159+

This scientist: 69 D-Index — 66th percentile

66% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683 69
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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Overview

John D. Brennan is affiliated with McMaster University in Canada. Their research spans multiple scientific disciplines, with primary focuses in biochemistry, genetics, and molecular biology, as well as engineering and medicine. Within these fields, Brennan has contributed notably to molecular biology, biomedical engineering, infectious diseases, ecology, and physiology.

The main topics in Brennan's body of work include advanced biosensing and bioanalysis techniques, biosensors and analytical detection, bacteriophages and microbial interactions, SARS-CoV-2 detection and testing, SARS-CoV-2 and COVID-19 research, DNA and nucleic acid chemistry, and RNA and protein synthesis mechanisms.

Brennan has published extensively in the following venues:

  • Angewandte Chemie International Edition
  • Angewandte Chemie
  • Chemistry - A European Journal
  • Analysis & Sensing
  • Chemical Society Reviews

Some of Brennan's recent papers include:

  • Biosensing with DNAzymes, 2021, Chemical Society Reviews
  • High-Affinity Dimeric Aptamers Enable the Rapid Electrochemical Detection of Wild-Type and B.1.1.7 SARS-CoV-2 in Unprocessed Saliva, 2021, Angewandte Chemie International Edition
  • Diverse high-affinity DNA aptamers for wild-type and B.1.1.7 SARS-CoV-2 spike proteins from a pre-structured DNA library, 2021, Nucleic Acids Research
  • Functional nucleic acid biosensors utilizing rolling circle amplification, 2022, Chemical Society Reviews
  • Functional Nucleic Acids for Pathogenic Bacteria Detection, 2021, Accounts of Chemical Research

Brennan frequently collaborates with several researchers, including:

  • Yingfu Li
  • Jimmy Gu
  • Alfredo Capretta
  • Dawn White
  • Zijie Zhang

Best Publications

  • Properties and applications of proteins encapsulated within sol–gel derived materials

    Wen Jin;John D Brennan

  • Biosensing with DNAzymes

    Erin M. McConnell;Ioana Cozma;Quanbing Mou;John D. Brennan

  • Reagentless bidirectional lateral flow bioactive paper sensors for detection of pesticides in beverage and food samples

    S. M. Zakir Hossain;Roger E. Luckham;Meghan J. Mcfadden;John D. Brennan

  • β-Galactosidase-Based Colorimetric Paper Sensor for Determination of Heavy Metals

    S. M. Zakir Hossain;John D. Brennan

  • Development of a bioactive paper sensor for detection of neurotoxins using piezoelectric inkjet printing of sol-gel-derived bioinks.

    S. M. Zakir Hossain;Roger E. Luckham;Anne Marie Smith;Julie M. Lebert

  • An efficient RNA-cleaving DNA enzyme that synchronizes catalysis with fluorescence signaling.

    Shirley H J Mei;Zhongjie Liu;John D Brennan;Yingfu Li

  • Tools for water quality monitoring and mapping using paper-based sensors and cell phones.

    Clémence Sicard;Chad Glen;Brandon Aubie;Dan Wallace

  • Multiplexed paper test strip for quantitative bacterial detection.

    S. M. Zakir Hossain;Cory Ozimok;Clémence Sicard;Sergio D. Aguirre

  • Bridging the gap between in vitro and in vivo imaging: isostructural Re and 99mTc complexes for correlating fluorescence and radioimaging studies.

    Karin A. Stephenson;Sangeeta Ray Banerjee;Travis Besanger;Oyebola O. Sogbein

  • Unfolding of Acrylodan-Labeled Human Serum Albumin Probed by Steady-State and Time-Resolved Fluorescence Methods

    Kulwinder Flora;John D. Brennan;Gary A. Baker;Meagan A. Doody

  • Assemblage of signaling DNA enzymes with intriguing metal-ion specificities and pH dependences.

    Zhongjie Liu;Shirley H. J. Mei;John D. Brennan;Yingfu Li

  • Hydrophobic sol–gel channel patterning strategies for paper-based microfluidics

    Jingyun Wang;Maria Rowena N. Monton;Xi Zhang;Carlos D. M. Filipe

  • Fluorescent Probes as Reporters on the Local Structure and Dynamics in Sol−Gel-Derived Nanocomposite Materials

    Tracey Keeling-Tucker and;John D. Brennan

  • High-Affinity Dimeric Aptamers Enable the Rapid Electrochemical Detection of Wild-Type and B.1.1.7 SARS-CoV-2 in Unprocessed Saliva.

    Zijie Zhang;Richa Pandey;Jiuxing Li;Jimmy Gu

  • Sugar-modified silanes: precursors for silica monoliths

    Michael A. Brook;Yang Chen;Kui Guo;Zheng Zhang

  • A DNAzyme Feedback Amplification Strategy for Biosensing.

    Meng Liu;Qiang Zhang;Dingran Chang;Jimmy Gu

  • A graphene-based biosensing platform based on the release of DNA probes and rolling circle amplification.

    Meng Liu;Jinping Song;Jinping Song;Shaomin Shuang;Chuan Dong

  • A DNAzyme-Based Colorimetric Paper Sensor for Helicobacter pylori.

    M. Monsur Ali;Michael Wolfe;Kha Tram;Jimmy Gu

  • Tailoring Sol–Gel-Derived Silica Materials for Optical Biosensing

    Maria Rowena N. Monton;Erica M. Forsberg;John D. Brennan

  • Development and Scale-Up of a Continuous, High-Pressure, Asymmetric Hydrogenation Reaction, Workup, and Isolation

    Unknown

  • Target‐Induced and Equipment‐Free DNA Amplification with a Simple Paper Device

    Meng Liu;Christy Y. Hui;Qiang Zhang;Jimmy Gu

  • Paper-based microfluidics with an erodible polymeric bridge giving controlled release and timed flow shutoff

    Sana Jahanshahi-Anbuhi;Aleah Henry;Vincent Leung;Clémence Sicard

  • Creating fast flow channels in paper fluidic devices to control timing of sequential reactions

    Sana Jahanshahi-Anbuhi;Puneet Chavan;Clémence Sicard;Vincent Leung

Frequent Co-Authors

Yingfu Li
Yingfu Li McMaster University
Michael A. Brook
Michael A. Brook McMaster University
Ulrich J. Krull
Ulrich J. Krull University of Toronto
Robert Pelton
Robert Pelton McMaster University
Ben Richard Hughes
Ben Richard Hughes University of Hull
John Kaiser Calautit
John Kaiser Calautit University of Nottingham
Chuan Dong
Chuan Dong Shanxi University
Parameswaran Nair
Parameswaran Nair McMaster University
Gary A. Baker
Gary A. Baker University of Missouri
Frank V. Bright
Frank V. Bright University at Buffalo, State University of New York

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