A wearable nanoscale heart sound sensor based on P(VDF-TrFE)/ZnO/GR and its application in cardiac disease detection

• Yi Luo,
• Jian Liu,
• Jiachang Zhang,
• Yu Xiao,
• Ying Wu and
• Zhidong Zhao

Beilstein J. Nanotechnol. 2023, 14, 819–833, doi:10.3762/bjnano.14.67

• system designed in this paper can collect heart sound signals in real time and predict whether the heart sounds are normal or abnormal, providing a new solution for the diagnosis of heart diseases. Keywords: composite piezoelectric nanofilm; electrospinning; heart sound classification algorithm; heart

• response open-circuit voltage peaks than the P(VDF-TrFE) and P(VDF-TrFE)/ZnO sensors, indicating that the composite piezoelectric nanofilm with added ZnO and trace GR fillers showed stronger improvement in acoustic-electric conversion performance. This makes it more suitable for sound energy collection

• and close to the skin, while the use of a machine learning algorithm to classify heart sound signals solves the shortcomings of traditional auscultation, such as introducing murmurs and relying on personal experience for interpretation. Preparation process of composite piezoelectric nanofilm. Flexible