Nanostructure Surface Charge Visualization via Charged Nanoparticles

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Solution Overview

Problem

Current electrostatic force microscopes (EFM) face challenges in quantitatively detecting surface charge distribution on 1-D nanomaterials, particularly due to slow scanning processes and difficulty in identifying charge distribution on individual nanostructures and large-scale surfaces.

Innovation Solution

A method involving the use of charged nanoparticles sprayed onto an insulated nanostructure sample, followed by vapor condensation, allows for visualization of surface electric field distribution using an optical microscope, where like charges repel and opposite charges attract, enabling the delineation of charge distribution patterns.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If electrostatic force microscope (EFM) is used to characterize surface charge distribution, then measurement precision is improved, but productivity deteriorates due to slow scanning process

Engineering Contradiction:

Improvesurface charge distribution measurementVSAvoidscanning speed

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent replaces the mechanical scanning system of EFM with a static imaging approach using charged nanoparticles and optical microscopy. Instead of mechanically scanning a probe across the sample surface, the method uses electrostatic interaction between charged nanoparticles and the sample surface to create a visible charge distribution pattern that can be captured by a stationary optical microscope, thereby eliminating the slow scanning process while maintaining measurement capability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces charged nanoparticles as an intermediary medium to transfer and visualize surface charge distribution information. The charged nanoparticles act as mediators that interact electrostatically with the charged areas on the sample surface, making the invisible electric field visible through optical microscopy without requiring direct mechanical contact or scanning

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If EFM is used for detecting large scaled surface charge distribution, then measurement precision is improved, but ease of operation deteriorates due to difficulty in finding specimens

Engineering Contradiction:

Improvesurface charge distribution detectionVSAvoidspecimen identification

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent uses optical microscopy to detect visual changes in the distribution of charged nanoparticles, which appear as varying intensities or patterns of light scattering. This allows operators to easily identify and locate charged areas on the sample surface through visual observation, eliminating the difficulty of finding specimens that plagues EFM operations

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The replacement of mechanical scanning with optical imaging enables operators to visually locate and identify charged regions across large sample areas without the complexity of coordinating mechanical scanner movements, significantly improving ease of operation for large-scale charge distribution detection

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 method provides a faster and more efficient visualization of surface charge distribution, overcoming the limitations of traditional EFM by using charged nanoparticles and vapor condensation to create visible patterns under an optical microscope, allowing for accurate imaging and measurement of electric field distribution.

Implementation Method 1

spraying first charged nanoparticles to the insulated layer; like charges repel and opposite charges attract, enabling the delineation of charge distribution patterns

Methodology Applied

Scientific EffectElectrostatic force: Coulomb's Law

Implementation Method 2

blowing vapor to the insulated layer to observe the distribution of the first charged nanoparticles via an optical microscope

Methodology Applied

Scientific EffectVapor condensation: Condensation

Data Source

PatentUS10429425B2Method for detecting surface electric field distribution of nanostructures

Publication Date: 2019.10.01 HON HAI PRECISION INDUSTRY CO LTD

AI summary

The disclosure relates to a method for detecting surface electric field distribution of nanostructures. The method includes the following steps of: providing a sample located on an insulated surface of a substrate; spraying first charged nanoparticles to the insulated surface; and blowing vapor to the insulated surface to observe a distribution of the first charged nanoparticles via an optical microscope.