The shared chemistry
Target recognition and enzyme reporters also appear in immunoassays. HRP and TMB alone do not define EFIRM.
TECHNOLOGY
EFIRM electrochemical
biosensing technology.
EFIRM (Electric Field-Induced Release and Measurement) combines molecular recognition, field-assisted interactions and electrochemical readout in one research platform.
THE SCIENTIFIC FOUNDATION
Recognition meets
electrochemistry.
EFIRM couples a functionalized electrode surface with a pulsed electric field and enzyme-mediated detection. A biomolecular interaction becomes a measurable current.
Selected assays work directly with plasma or saliva without polymerase chain reaction (PCR) amplification or a conventional nucleic acid extraction step. Sample handling and assay requirements remain protocol-specific.
Three technologies. One platform.
Interface → binding → electrochemical current
1Engineer the electrode interface
Electropolymerization incorporates capture probes into a conducting-polymer layer on the working electrode.
2Modulate the binding kinetics
A cyclic electrical waveform assists complementary target binding at the sensing interface.
3Cycle the signal chemistry
HRP oxidizes TMB; the electrode reduces it. Repeated turnover generates the measured current.
THE INTEGRATED MECHANISM
Three technologies.
One electrochemical assay.
Explore the sensing interface, electric-field modulated binding and HRP–TMB redox cycling in a published nucleic acid assay.
- Capture probe
- Conducting polymer
- Working electrode
- Pyrrole → PPy interface
TECHNOLOGY 1 / 3
Build the recognition interface
An applied electrical waveform polymerizes a conducting-polymer layer at the gold working electrode, incorporating capture probes at the sensing interface. Published nucleic acid methods use polypyrrole (PPy).
The electrode, polymer and molecular probes form one functional interface. This schematic illustrates a published nucleic acid assay; surface formulations vary by method.
Published nucleic acid assay schematic · not to scale. Molecular motion and the current trace illustrate the mechanism. Release and sample preparation are assay-specific; washes and controls are omitted from the drawing.
WHY THE INTEGRATION MATTERS
Recognition chemistry.
An electrically controlled interface.
EFIRM’s platform logic combines how the probe is immobilized, how binding is controlled and how the signal is measured.
The integrated control
A conducting-polymer electrode interface and programmed electrical waveforms connect probe immobilization with control of molecular binding kinetics and stringency.
The measured output
Conventional colorimetric ELISA reads an optical signal. The illustrated EFIRM assay measures current from enzyme–electrode redox cycling. Electrochemical immunoassays also exist; the distinction here is the integrated EFIRM method.
Changing the recognition chemistry allows new targets to be investigated within an electrochemical architecture. Each application still needs a suitable assay, controls and analytical validation.
RESEARCH WORKFLOW · 2020
From plate to workstation.
A look at plate handling and the software workspace in an earlier EFIRM research setup.
Plate handling
Positioning a research plate on the instrument.
Software workspace
A plate layout interface alongside the research instrument.
THE FOUNDATION OF EFIRM
Three ideas.
One integrated method.
EFIRM connects electrical control, conducting-polymer interfaces and enzyme–electrode signal generation.
Control molecular recognition
Programmed electric fields modulate target transport, hybridization kinetics and binding stringency at the sensing interface.
Engineer the probe interface
Electropolymerization incorporates capture probes into polypyrrole on a working electrode, connecting molecular recognition to a controllable surface.
Measure a cycling current
Target-associated HRP catalyzes TMB oxidation with hydrogen peroxide. Electrode reduction regenerates TMB, creating repeated signal turnover without copying target DNA.
Target-specific recognition chemistry, specimen handling and controls define each assay. Published studies document the method’s evolution and its application-specific limitations.
THE RESEARCH EVOLUTION
Each study asks
the next question.
From electrochemical recognition to liquid biopsy research, successive studies refine the target, specimen and measurement method.
Electrochemical foundations
Researchers measured salivary IL-8 mRNA and protein with an electrochemical sensor, connecting different recognition chemistries to electrical readout.
Read the studyElectric field-induced release and measurement
An exosome-specific research method combined magnetic-bead enrichment with field-assisted RNA release and measurement of a surface-associated protein marker.
Read the studySelected EGFR variants in liquid biopsy
A saliva and plasma study investigated selected EGFR mutations in lung cancer cohorts, extending the research into target-specific mutation detection.
Read the studyCharacterization and technical validation
Analytical research examined selected EGFR assays in plasma and saliva, including variant-specific performance and specimen handling.
Read the studyResearch methods evolve across studies. A result for one target and protocol does not establish performance for every assay or for a current product configuration.
TECHNOLOGY → CAPABILITY → APPLICATION
Different targets.
A common platform logic.
Published examples span human biomarkers, vesicle-associated signals, food authenticity and agricultural testing.
Selected EGFR mutations
Complementary capture and detector probes connect selected mutation sequences to PCR-free electrochemical measurement.
Evidence & stage
Human cohort research; selected variants. Further analytical characterization was published in 2020.
Exosome-associated biomarkers
Magnetic beads enrich exosomes before electric-field-assisted release of RNA for capture. A surface-associated protein marker is measured without vesicle rupture. Electrical release provides target access; the beads perform separation.
Evidence & stage
Foundational laboratory and mouse-model research. Release is part of this assay, rather than every EFIRM workflow.
Multiple viral biomarker classes
Four separate assays connect distinct recognition chemistries to an electrochemical platform. The viral RNA workflow includes isothermal amplification (RT-LAMP) and restriction digestion.
Evidence & stage
Separate singleplex research assays, with assay-specific preparation. The neutralizing-antibody assay is competitive; higher antibody activity gives lower current. Not a clinical indication or current kit specification.
Meat species identification
Species-specific DNA recognition connects meat identity research to PCR-free electrochemical readout, with sample treatment before measurement.
Evidence & stage
Published food-authenticity research. A route to species identification studies beyond human biomarkers.
Transgenic soybean identification
Event-specific DNA recognition is evaluated against real-time PCR in a blinded soybean cargo study.
Evidence & stage
Published research by external academic and food-testing groups. Event-specific evidence, rather than a universal GMO assay.
Salivary autoantibodies
Antibody assays extend the recognition chemistry beyond nucleic acid hybridization.
Evidence & stage
Research in two Danish cohorts. Read the associated corrigendum with the original study.
These are published research applications across different assay configurations. They do not establish current EFIRM96 specifications, kit availability or diagnostic authorization. Explore the publication library for authors, methods and study scope.
Browse the publication library →THE NEXT RESEARCH HORIZON
Molecular information.
Across time.
Our research thesis: reliable longitudinal molecular data is a critical missing layer for future AI-enabled health research.
Establish useful measurements
EFIRM96, EPLATE and software provide a laboratory platform for research and assay development. An automated prototype is available for demonstration and discussion with investment organizations and CLIA laboratories. It is a prototype, not a commercially available or clinically validated product.
Explore accessible sampling
Electrical control and current readout offer a route to miniaturization. Our longer-term goals include handheld instruments and smartphone modules, paired with appropriately validated assays.
Connect biology over time
Repeated saliva sampling could support molecular observations across time and physiological states. Carefully designed cohorts and reproducible measurements could create a data layer for future model-based research.
The path requires hardware development, assay validation, longitudinal studies and responsible data analysis. Handheld and smartphone products, continuous monitoring and AI-based clinical interpretation are future research goals.
Help develop the next research platformWhat “PCR-free”
actually means.
No DNA copying step
Selected EFIRM assays measure target molecules without PCR-based nucleic acid amplification.
Signal still matters
Enzyme chemistry enhances the measurable electrical signal. “PCR-free” does not mean “no signal amplification.”
Performance is specific
Limits of detection, sample volume, timing and reproducibility depend on the target, sample type (matrix) and validated protocol.
Research results for an individual assay should not be generalized to all biomolecules, diseases or specimens. Published clinical cohorts do not establish a product’s current intended use or regulatory status.
Bring a new question to the platform.
Discuss your research goals, platform needs or a new scientific collaboration.