Self-Powered Biosensing Techniques for MicroRNA Detection

MicroRNAs are short non-coding RNAs that regulate gene expression and serve as critical biomarkers for a wide range of diseases including cancer, cardiovascular disorders and viral infections. Conventional detection methods often rely on external power supplies and bulky instrumentation, limiting their applicability in point-of-care diagnostics and in-field screening. Self-powered biosensing techniques harness ambient mechanical, thermal or biochemical energy to drive signal transduction, eliminating the need for battery packs or wired connections. By integrating nanogenerators—such as triboelectric and piezoelectric devices—with highly sensitive recognition elements, these platforms deliver autonomous operation, rapid response times and attomolar-level limits of detection. Key advances include the pairing of energy-harvesting modules with electrochemical, optical or microarray sensors, enabling multiplexed assays in portable or wearable formats. Such systems promise real-time monitoring, minimal maintenance and broad deployment in resource-limited settings, thereby advancing early diagnosis and personalised medicine.

Research from Nature Portfolio

Recent studies have introduced real-time digital microarrays employing plasmonic gold nanorods as optical labels to track individual microRNA molecules on sensor surfaces. This approach achieves attomolar sensitivity and reduces total assay time from hours to under an hour by continuously monitoring binding events rather than relying on end-point measurements. In parallel, developments in piezoelectric nanogenerator-powered electrochemical biosensors have demonstrated autonomous signal generation for miRNA targets. These devices convert mechanical deformation into electrical stimuli that drive redox reactions at the electrode interface, achieving sub-femtomolar detection limits within compact, hand-held platforms. Together, these efforts underscore the potential of integrating energy harvesters with advanced transduction schemes to realise fully self-sufficient microRNA diagnostics.

Self-Powered Biosensing Techniques for MicroRNA Detection publication trend

The graph below shows the total number of articles in self-powered biosensing techniques for microrna detection across all publications each year (not limited to Nature Index journals).

Technical terms

Triboelectric nanogenerator: A device that converts mechanical friction or motion into electrical energy through contact electrification and electrostatic induction.

Piezoelectric nanogenerator: A material or structure that generates an electrical charge in response to applied mechanical stress.

Plasmonic gold nanorods: Anisotropic gold nanoparticles that enhance optical signals via localized surface plasmon resonance.

Branched hybridisation chain reaction: A nucleic acid amplification method in which initiated DNA hairpins form branched, dendritic structures for signal enhancement.

Duplex-specific nuclease: An enzyme that selectively cleaves double-stranded DNA or RNA–DNA hybrids, enabling cyclic target recycling and amplification.

Digital microarray: A biosensing platform that tracks individual target molecules in real time on spatially defined sensor spots for absolute quantification.

References

1. Attomolar sensitivity microRNA detection using real-time digital microarrays. Scientific Reports (2022).
2. In situ imaging of intracellular miRNAs in tumour cells by branched hybridisation chain reaction. Cell Proliferation (2024).
3. Handgrip‐Ring Structure Sensing Probe Assisted Multiple Signal Amplification Strategy for Sensitive and Label‐Free Single‐Stranded Nucleic Acid Analysis. Journal of Analytical Methods in Chemistry (2024).
4. Fluorescence DNA Switch for Highly Sensitive Detection of miRNA Amplified by Duplex-Specific Nuclease. Sensors (2022).