Hydrogen Gas Sensor with Palladium Nanoscale Petals

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Solution Overview

Problem

Current hydrogen gas sensors lack a combination of high hydrophobicity and effective gas sensing characteristics, and their manufacturing processes are often complex and costly, making them unsuitable for industrial-scale production and extreme environmental conditions.

Innovation Solution

A hydrogen gas sensor is developed using a polycarbonate substrate with palladium nanoscale petals forming a double-layer structure, created through a simple and inexpensive process involving wet chemical treatment and sputtering, which provides excellent hydrophobicity and superior gas sensing capabilities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If conventional hydrogen gas sensor manufacturing processes are used, then gas sensing function is achieved, but manufacturing complexity and cost increase

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidsensor structure complexity

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The sensor is divided into two functional layers: a polycarbonate substrate providing hydrophobic nanostructures, and a palladium layer providing gas sensing functionality. This segmentation allows each layer to be optimized independently and manufactured through simpler, more cost-effective processes while maintaining overall sensor performance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The sensor combines polycarbonate material with hydrophobic nanostructures and palladium coating to create a composite structure that simultaneously achieves hydrophobicity for stability and palladium-based gas sensing capabilities, resolving the contradiction between manufacturing simplicity and functional complexity.

Inventive Principle:

Principle #40Composite materials

2Reliability

If standard sensor surfaces are used, then manufacturing is simple, but hydrophobicity and stability in extreme conditions are insufficient

Engineering Contradiction:

Improvesensor stability in extreme conditionsVSAvoidmanufacturing process complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The polycarbonate substrate undergoes parameter changes through controlled treatment to develop hydrophobic nanostructures with specific surface properties. This modifies the surface energy and wettability parameters to achieve high hydrophobicity, enhancing sensor stability in extreme environmental conditions while maintaining manufacturability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The polycarbonate substrate is engineered to possess a porous nanostructure that provides hydrophobic characteristics. This porous architecture increases surface area and enhances water repellency, improving sensor reliability in humid and extreme conditions without significantly complicating the manufacturing process.

Inventive Principle:

Principle #31Porous materials

3Adaptability or versatility

If sensors are designed for extreme environmental conditions, then reliability improves, but manufacturing complexity increases

Engineering Contradiction:

Improveenvironmental condition adaptabilityVSAvoidsensor design complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The polycarbonate substrate serves multiple functions: it provides structural support, creates hydrophobic nanostructures for environmental adaptability, and serves as a base for palladium deposition. This multi-functionality reduces overall design complexity while enhancing the sensor's ability to operate in extreme environmental conditions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The sensor achieves high repeatability and stability, with a wetting contact angle suitable for hydrogen sensing, and demonstrates superior gas sensing characteristics, making it suitable for industrial-scale production and extreme environmental conditions.

Implementation Method 1

a palladium layer in the form of nanoscale petals on the hydrophobic nanostructure

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 2

polycarbonate substrate having hydrophobic nanostructures

Methodology Applied

Scientific EffectHydrophobicity: Hydrophobe

Implementation Method 3

created through a simple and inexpensive process involving wet chemical treatment and sputtering

Methodology Applied

Scientific EffectSputtering: Sputtering

Data Source

PatentUS11808747B1Hydrogen gas sensor, and method of making and using thereof

Publication Date: 2023.11.07 KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

AI summary

A hydrogen gas sensor is provided. The hydrogen gas sensor includes a polycarbonate substrate having hydrophobic nanostructures. The hydrogen gas sensor further includes a palladium layer in the form of nanoscale petals on the hydrophobic nanostructure. A method of making the hydrogen gas sensor is also provided. The method of making the hydrogen gas sensor includes fabricating the polycarbonate substrate. The method of making the hydrogen gas sensor further includes coating the polycarbonate substrate with the palladium layer. A method of using the hydrogen gas sensor is also provided. The method of using the hydrogen gas sensor includes contacting a palladium coated hydrophobic nanostructure of the hydrogen gas sensor with a gas sample comprising hydrogen gas.