Enhanced Detection Resonance Frequency Shift of a Piezoelectric Microcantilever Sensor by a DC Bias Electric Field in Humidity Detection.

{
  "study_type": "engineering",
  "exposure": {
    "band": null,
    "source": "DC bias electric field (applied to PMN-PT layer in a piezoelectric microcantilever sensor)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Longitudinal flexural resonance frequency shift (relative)",
    "Humidity detection sensitivity/enhancement"
  ],
  "main_findings": "Applying a DC bias electric field to the PMN-PT layer during humidity detection enhanced the relative longitudinal flexural resonance frequency shift of the PMN-PT/tin PEMS. The maximum enhancement was reported as more than threefold at E = -6 kV/cm compared with no bias field, and the maximal shift at this field was about 1000 times larger than could be explained by mass loading alone.",
  "effect_direction": "benefit",
  "limitations": [
    "No sample size or number of devices/replicates reported in the abstract",
    "No details on humidity range, experimental conditions, or statistical analysis provided in the abstract",
    "Mechanistic attribution beyond mass loading is not fully detailed in the abstract"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "piezoelectric microcantilever sensor",
    "PMN-PT",
    "PEMS",
    "DC bias electric field",
    "humidity detection",
    "resonance frequency shift",
    "mass loading"
  ],
  "suggested_hubs": []
}