Heterojunction Composite Chalcogenization Pore Formation
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Solution Overview
Problem
Conventional methods for forming nanocomposite materials with anisotropic materials dispersed within isotropic substrates often result in pore formation during heat treatment, which damages the layered structure and prevents the expression of unique properties in composite materials.
Innovation Solution
A heterojunction composite is created by dispersing an anisotropic chalcogenide metal compound within an isotropic substrate, where the substrate is chalcogenized using a chalcogenide precursor and metal precursor sources, ensuring a dense structure without pore formation and preserving the layered structure of the chalcogen compound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If heat treatment is applied to form nanocomposite material, then anisotropic material can be dispersed within base material, but properties of anisotropic material are nullified and pores are formed
Solution Approach 1:
The patent changes the chemical state of the base material by chalcogenizing it, transforming the interaction mechanism from thermal-based to chemical-based. This allows dispersion of anisotropic chalcogenide materials without heat treatment that would nullify their properties, resolving the contradiction between achieving uniform dispersion and preserving material properties
Solution Approach 2:
The patent introduces chalcogen compounds as an intermediary substance that facilitates the bonding and dispersion of anisotropic materials within the base material. This intermediary enables uniform distribution without requiring harmful heat treatment, thus preserving the unique properties of anisotropic materials
2Stability of the object's composition
If heat treatment is applied to form nanocomposite material, then anisotropic material can be dispersed within base material, but pore formation occurs damaging layered structure
Solution Approach 1:
The patent changes the processing parameters from high-temperature heat treatment to low-temperature chalcogenization process. This parameter change enables uniform dispersion of anisotropic materials while preventing pore formation and preserving the integrity of layered structures through a gentler chemical transformation process
Solution Approach 2:
The patent replaces the thermal-mechanical heat treatment process with a chemical chalcogenization process. This substitution eliminates the mechanical stresses and pore formation associated with heat treatment while achieving the desired uniform dispersion of anisotropic materials within the base material
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
This approach allows for the uniform dispersion of anisotropic materials within isotropic substrates, enabling the expression of enhanced electrical, structural, optical, thermal, magnetic, and electrochemical properties, and demonstrates high efficiency and stability as an electrode in reactions such as hydrogen evolution and oxygen reduction.
Implementation Method 1
supplying a chalcogenide precursor-containing source and a metal precursor-containing source onto a substrate; and chalcogenizing the substrate
Data Source
AI summary
The present disclosure relates to a heterojunction composite including: a chalcogenide metal compound dispersed on a substrate, and all or a part of the substrate is chalcogenized in the same manner as the chalcogenide metal compound.