Functionalized Conductive Nanocomposites for Inkjet Printing
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Solution Overview
Problem
Current methods for producing conductive structures on surfaces are complex and do not allow for easy functionalization, particularly in biological applications, due to the need for thermal treatment to remove stabilizers from nanoparticle suspensions and the limitations of conventional inks.
Innovation Solution
A composition comprising conductive or semiconductive nanostructures with conductive ligands that can be functionalized, using a process involving the substitution of non-conductive ligands with conductive polymers, allowing for stable colloidal dispersions in various solvents and enabling functionalization without the need for thermal treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional conductive inks with stabilizers are used, then colloidal stability is achieved, but thermal treatment is required to remove stabilizers which adds process complexity
Solution Approach 1:
The invention extracts and removes the stabilizer component from the nanoparticle suspension system. By using stabilizer-free conductive inks, the patent eliminates the need for thermal treatment to remove stabilizers, thereby simplifying the overall process while maintaining colloidal stability through alternative means.
Solution Approach 2:
The invention performs preliminary action by pre-functionalizing the nanoparticle surfaces with conductive ligands before application. This preliminary functionalization ensures that the nanoparticles remain stable and conductive without requiring subsequent thermal treatment to remove stabilizers, thus simplifying the process flow.
2Manufacturing precision
If photolithographic processes are used for producing conductive structures, then precise structuring is achieved, but the processes become very complex
Solution Approach 1:
The invention replaces the complex photolithographic mechanical and chemical processing system with a simpler direct printing approach. By using functionalized conductive inks that can be directly applied and cured without photolithography, the patent achieves comparable structuring precision with significantly reduced process complexity.
Solution Approach 2:
The invention changes the key parameter from photolithographic patterning to direct printing deposition. By altering the manufacturing approach from multi-step photolithography to single-step direct printing with functionalized inks, the patent maintains structuring precision while dramatically simplifying the overall process.
3Quantity of substance
If water or alcohol solvents are used in suspensions, then cost is reduced, but stability of the suspension becomes more difficult to maintain
Solution Approach 1:
The invention extracts and removes the need for additional stabilizers from the suspension system. By using stabilizer-free conductive inks with pre-functionalized nanoparticles, the patent enables the use of simple, low-cost solvents like water and alcohol without compromising suspension stability, as the conductive ligands themselves provide the necessary stabilization.
Solution Approach 2:
The conductive ligands serve multiple functions simultaneously: they provide electrical conductivity, surface stabilization, and solvent compatibility. This multi-functionality allows the use of simple, low-cost solvents like water and alcohol while maintaining suspension stability without requiring additional stabilizing agents.
4Reliability
If conventional inks are used, then conductive coating is achieved, but functionalization capability is lost
Solution Approach 1:
The invention merges the conductive coating function with the functionalization capability into a single integrated system. By incorporating functional groups directly into the conductive ligands on nanoparticle surfaces, the patent achieves both reliable conductive coating and simultaneous functionalization, eliminating the need for separate functionalization steps.
Solution Approach 2:
The invention uses composite material structures where functional groups are integrated into the conductive ligand framework. This creates a composite functional-conductive coating that simultaneously provides electrical conductivity and specific functional properties (such as biocompatibility or surface adhesion) without requiring separate layers or materials.
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
Enables the simple production of functionalized conductive layers on surfaces, providing enhanced stability and versatility for biological applications, with the ability to maintain colloidal stability and facilitate functionalization in a wide range of solvents.
Implementation Method 1
The ligand is preferably a conductive polymer whose polymer backbone adsorbs onto the nanostructures either through its conjugated pi-system or through a functionality directly in or in the immediate vicinity of the conductive polymer backbone.
Implementation Method 2
To ensure increased stability the conductive polymer is a polymeric or oligomeric structure comprising at least 10 bonding sites. These bonding sites make it possible to achieve a coordinative bond to the surface of the nanostructure
Data Source
AI summary
A composition includes at least one type of conductive or semiconductive nanostructures, wherein at least one conductive ligand is arranged on the surface of the nanostructures, and at least one solvent, wherein the ligand has at least one group by which functionalization is possible. This makes it possible in simple fashion to obtain functionalizable conductive structures, in particular by inkjet processes.