Related Experiment Video
Updated: May 16, 2025
08:02
Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure
Published on: April 17, 2018
10.3K
Gas-liquid two-phase bubble flow spinning for hydrovoltaic flexible electronics.
Yuanming Cao1, Ji Tan2, Tingting Sun1
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Biological Science and Medical Engineering, Donghua University, Shanghai, China.
Nature Communications
|May 12, 2025
Summary
Researchers developed novel hydrovoltaic fibers using a spider-inspired spinning method. These fibers generate electricity and sense environmental changes, paving the way for advanced wearable electronics and smart devices.
Area of Science:
- Materials Science
- Renewable Energy
- Textile Electronics
Background:
- Hydrovoltaic technologies offer a renewable energy source by generating electricity from water movement without chemical reactions.
- Self-powered flexible sensors, particularly hydrovoltaic fibers, are a key research area for energy harvesting and sensing applications.
- Integrating sensing and power generation in fibers is challenging due to the need for controlled water movement.
Purpose of the Study:
- To develop a novel method for fabricating functional hydrovoltaic fibers with integrated sensing and power generation capabilities.
- To explore the relationship between fiber structure and hydrovoltaic performance for targeted applications.
- To demonstrate the potential of these fibers in practical applications like smart masks.
Main Methods:
- A gas-liquid two-phase flow spinning method, inspired by spider silk production, was employed to create fibers with unique cross-sectional shapes (hollow, solid spindle, ratchet tooth).
- Alginate-bridged Molybdenum disulfide (MoS₂) was used as the primary material, with other materials like carboxymethyl cellulose and polyvinyl alcohol also explored.
- The fabricated fibers were characterized for their power generation (power density, voltage, stability) and sensing capabilities (sensitivity to relative humidity).
Main Results:
- The spinning method successfully produced fibers with controlled shapes that influence water adsorption and transfer.
- The alginate-bridged MoS₂ fibers achieved a power density of 2.18 mW/cm³, stable operation at 2.1 V for 43 hours, and a sensitivity of 9.36 mV/RH%/s.
- The fibers demonstrated potential for applications such as smart masks for nasal cycle monitoring and diagnosis.
Conclusions:
- The developed spinning technique enables the creation of structure-controlled hydrovoltaic fibers for energy harvesting and sensing.
- These fibers represent a significant advancement in textile electronics and the design of structure-responsive hydroelectric materials.
- The technology holds promise for developing advanced wearable sensors and self-powered devices for health monitoring and other applications.
Related Concept Videos
01:17Steady, Laminar Flow Between Parallel Plates
92
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
92
01:22Couette Flow
136
Couette flow represents the flow of fluid between two parallel plates, with one plate fixed and the other moving with a constant velocity. This configuration allows for a simplified analysis using the Navier-Stokes equations, which govern fluid motion under conditions of viscosity and incompressibility. For Couette flow, the assumptions include a steady, laminar, incompressible flow with a zero-pressure gradient in the flow direction. This flow type is beneficial for understanding shear-driven...
136