Cited by 217Innovative Energy Harvesting TechnologiesAdvanced Sensor and Energy Harvesting MaterialsWireless Body Area Networks

Energy extraction from the biologic battery in the inner ear

Open access
Mercier, Patrick P, Lysaght, Andrew C, Bandyopadhyay, Saurav, Chandrakasan, Anantha P, Stankovic, Konstantina M·2012·Nature Biotechnology

Abstract

Endocochlear potential (EP) is a battery-like electrochemical gradient found in and actively maintained by the inner ear. Here we demonstrate that the mammalian EP can be used as a power source for electronic devices. We achieved this by designing an anatomically sized, ultra-low quiescent-power energy harvester chip integrated with a wireless sensor capable of monitoring the EP itself. Although other forms of in vivo energy harvesting have been described in lower organisms, and thermoelectric, piezoelectric and biofuel devices are promising for mammalian applications, there have been few, if any, in vivo demonstrations in the vicinity of the ear, eye and brain. In this work, the chip extracted a minimum of 1.12 nW from the EP of a guinea pig for up to 5 h, enabling a 2.4 GHz radio to transmit measurement of the EP every 40–360 s. With future optimization of electrode design, we envision using the biologic battery in the inner ear to power chemical and molecular sensors, or drug-delivery actuators for diagnosis and therapy of hearing loss and other disorders.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1038/nbt.2394

Cites

33 of 33 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Existing energy-harvesting methods (thermoelectric, piezoelectric, biopotential, or glucose) are anatomically specific and yield power densities too low (<0.1 μW/mm2) for a microimplant.

    “However, these methods are anatomically specific and, in their existing forms, yield power densities too low (<0.1 μW/mm 2 ) for a microimplant.”

    From Wireless power transfer to deep-tissue microimplants (2014) · cites this paper as [8]

    The passage on implantable energy sources (section labelled Abstract; page unavailable) says thermoelectric and piezoelectric approaches require externally worn apparatuses for mammalian applications, and describes limitations of reported biofuel cells. It does not give a <0.1 μW/mm² power-density threshold for those methods or establish that all four named methods are anatomically specific and too low-power for a microimplant. (LLM, conf=0.84)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Mercier, P. P., Lysaght, A. C., Bandyopadhyay, S., Chandrakasan, A. P., & Stankovic, K. M.
Affiliations
  • University of California San Diego (US)
  • Massachusetts Eye and Ear Infirmary (US)
  • Massachusetts Institute of Technology (US)
Corresponding author
Chandrakasan, Anantha P
Venue
Nature Biotechnology
Published
2012-11-08
Volume
30
Issue
12
Pages
1240-1243
ISSN
  • 0733-222X (ISSN-L)
  • 1087-0156
  • 1546-1696
OpenAlex
W1969081205
Cited by
217
References
33
Citations by year
2026: 5 · 2025: 7 · 2024: 16 · 2023: 9 · 2022: 13 · 2021: 19 · 2020: 16 · 2019: 13 · 2018: 18 · 2017: 27 · 2016: 16 · 2015: 21 · 2014: 24 · 2013: 11 · 2012: 2
FWCI
28.39
Type
journal article
Language
en
Open access
Locations
  • Nature Biotechnology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute on Deafness and Other Communication Disorders (T32-DC-00038, K08DC010419, T32DC000038)
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › Innovative Energy Harvesting Technologies
  • Physical Sciences › Engineering › Biomedical Engineering › Advanced Sensor and Energy Harvesting Materials
  • Physical Sciences › Engineering › Biomedical Engineering › Wireless Body Area Networks
Keywords
endocochlear potential, inner ear, wireless sensors, guinea pig, hearing loss, molecular sensors
MeSH terms
Animals, Bioelectric Energy Sources, Biotechnology, Cochlear Microphonic Potentials, Electronics, Medical, Equipment Design, Guinea Pigs, Ear, Inner, Electrophysiological Phenomena

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review