Beilstein J. Nanotechnol.2023,14, 819–833, doi:10.3762/bjnano.14.67
flexible piezoelectric thin film heartsoundsensor was developed, and a heart sound detection and classification system was built based on this sensor. Zinc oxide (ZnO) and graphene (GR) fillers were added to the P(VDF-TrFE) matrix, and P(VDF-TrFE)/ZnO/GR composite piezoelectric nanofilms were prepared
using a high-voltage electrospinning process. The resulting piezoelectric nanofilm was encapsulated into a wearable, flexible heartsoundsensor for detecting heart sounds. A heart sound detection system was then built using LabVIEW software, which detects heart sounds and extracts features from the
electrospinning were controlled at 25 °C and 40% RH, respectively.
Fabrication of wearable flexible nanoscale heart sound sensors
Figure 2 illustrates the process of creating a wearable, flexible nanoscale heartsoundsensor with a sandwich structure. First, a rectangular composite nanofilm measuring 4.5 cm in
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Figure 1:
Preparation process of composite piezoelectric nanofilm.