Polyelectrolyte-based wireless and drift-free iontronic sensors for orthodontic sensing

The real-time monitoring of health conditions of humans is a long-lasting topic, but there are two major challenges. First, many biomedical applications accept only implanted sensors. Second, tissue-like soft sensors often suffer from viscoelasticity-induced signal drift, causing inaccurate measurements. Here, we report a wireless and drift-free sensory system enabled by a low-creep polyelectrolyte elastomer. The system consists of ionotropic pressure sensors incorporating LC oscillators, exhibiting a combined low drift ratio, high Q-factor, high robustness to interferences, and wide-range measurement, superior to other capacitive sensors using regular dielectrics or ionogels. We have recorded 14-day orthodontic loads of two subjects using the system, showing pressure decreasing from 300 to 50 kPa and torque from 12.5 to 0.5 N·mm. The wireless, drift-free sensory system may be extended to other implants for long-term and accurate sensing., , , # Data from: Polyelectrolyte-based wireless and drift-free iontronic sensors for orthodontic sensing

[https://doi.org/10.5061/dryad.z34tmpgqn](https://doi.org/10.5061/dryad.z34tmpgqn)

## Description of the data and file structure

Every Excel concludes the data of 1 whole figure; FIG-number = the data in Figure-number of the main text; Figure - number - lowercase = the data in specific Figure; For instance, Figure 2b in FIG 2 Excel means the origin data of the Figure 2b. Each small graph has a unit, a physical quantity.

### Files and variables

#### File: FIG-2.xlsx

**Description:** **Fig. 2. Synthesis, mechanical properties, and electrical conductivity of the crosslinked P(VBIM-TFSI) polyelectrolyte.**

##### Variables

**Fig2 B** Wide-angle X-ray scattering spectra of the noncrosslinked polyelectrolyte and the crosslinked polyelectrolyte.

**Fig2 C** Tensile stress-strain curves of the two polyelectrolytes. 

**Fig2 D** Young’s modulus of the two polyelectrolytes.

**Fig...