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Dual-modal piezotronic transistor for highly sensitive vertical force sensing and lateral strain sensing.

ABSTRACT: Mechanical sensors are mainly divided into two types (vertical force sensing and lateral strain sensing). Up to now, one sensor with two working modes is still a challenge. Here, we demonstrate a structural design concept combing a piezoelectric nano/microwire with a flexible polymer with protrusions that enables a dual-modal piezotronic transistor (DPT) with two working modes for highly sensitive vertical force sensing and lateral strain sensing. For vertical force sensing, DPT exhibits a force sensitivity up to 221.5 N^-1 and a minimum identifiable force down to 21 mN, corresponding to a pressure sensitivity of 1.759 eV/MPa. For lateral strain sensing, DPT can respond to a large compression strain (~5.8%) with an on/off ratio up to 386.57 and a gauge factor up to 8988.6. It is a universal design that can integrate vertical force sensing and lateral strain sensing into only one nanodevice, providing a feasible strategy for multimodal devices.

SUBMITTER: Ge R

PROVIDER: S-EPMC10562489 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature

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Dual-modal piezotronic transistor for highly sensitive vertical force sensing and lateral strain sensing.

Ge Rui R Yu Qiuhong Q Zhou Feng F Liu Shuhai S Qin Yong Y

Nature communications 20231009 1

Mechanical sensors are mainly divided into two types (vertical force sensing and lateral strain sensing). Up to now, one sensor with two working modes is still a challenge. Here, we demonstrate a structural design concept combing a piezoelectric nano/microwire with a flexible polymer with protrusions that enables a dual-modal piezotronic transistor (DPT) with two working modes for highly sensitive vertical force sensing and lateral strain sensing. For vertical force sensing, DPT exhibits a force ...[more]

PMID: 37813847

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