Monosaccharide Phosphate Surface Modification of Nanoparticles
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Solution Overview
Problem
Current methods for surface modification of nanoparticles to achieve hydrophilicity, such as ligand exchange and encapsulation, face challenges like agglomeration, complex experimental conditions, and difficulties in mass production, particularly in maintaining dispersion stability in vivo environments.
Innovation Solution
A composition of hydrophilic nanoparticles is developed by adhering a monosaccharide-phosphate or its derivative to the surface of inorganic nanoparticles, using a monosaccharide-phosphate or its derivative combined with polyethyleneglycol or alcohol, which enables excellent water-dispersibility and biocompatibility, allowing for effective use in biomedical applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ligand exchange method is used to modify nanoparticle surface, then hydrophilicity is improved, but particle agglomeration occurs and dispersion stability deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the surface modifier by using monosaccharide phosphate esters with specific molecular structures and phosphate group configurations. This parameter change enables simultaneous achievement of hydrophilicity and dispersion stability, resolving the contradiction between improved hydrophilicity and deteriorated dispersion stability that occurs with conventional ligand exchange methods.
Solution Approach 2:
The patent creates a composite surface structure by combining monosaccharide units with phosphate ester groups, forming a hybrid modifier that integrates both hydrophilic characteristics and steric stabilization properties. This composite material approach allows the nanoparticle surface to simultaneously achieve hydrophilicity for biocompatibility and structural stability for preventing agglomeration.
2Adaptability or versatility
If encapsulation method is used to achieve hydrophilicity, then water-dispersibility is improved, but experimental conditions become complex and mass production becomes difficult
Solution Approach 1:
The patent extracts the essential hydrophilizing function from complex encapsulation systems and implements it through a simplified surface modification approach using monosaccharide phosphate esters. This extraction principle allows achieving water-dispersibility through a single-step surface treatment rather than multi-step encapsulation processes, thereby simplifying experimental conditions while maintaining mass production feasibility.
Solution Approach 2:
The patent changes the approach from physical encapsulation to chemical surface modification by introducing phosphate ester groups directly onto the nanoparticle surface. This parameter change in the modification strategy simplifies the process conditions while achieving the desired water-dispersibility, making the method suitable for mass production.
3Adaptability or versatility
If micelles are used to disperse nanoparticles, then hydrophilicity is improved, but hydrodynamic diameter increases and micelle breakage occurs in vivo
Solution Approach 1:
The patent extracts the hydrophilizing function from the micelle structure and applies it directly to the nanoparticle surface through monosaccharide phosphate ester modification. This eliminates the need for micelle formation, thereby avoiding micelle breakage in vivo while maintaining hydrophilicity and achieving smaller, more reliable nanoparticle dimensions for biomedical applications.
Solution Approach 2:
The patent changes the hydrophilicity mechanism from micelle-based physical encapsulation to direct chemical modification with monosaccharide phosphate esters. This parameter change in the modification approach eliminates the formation of large micelle structures, resulting in smaller hydrodynamic diameters and improved in vivo stability without micelle breakage.
4Adaptability or versatility
If conventional ligands are used for surface modification, then hydrophilicity is achieved, but molecular weight increases and ligand exchange becomes difficult
Solution Approach 1:
The patent changes the molecular parameters of the surface ligand by using monosaccharide phosphate esters with optimized molecular weights and structures. This parameter optimization maintains sufficient hydrophilicity while reducing molecular complexity, thereby facilitating easier ligand exchange and surface modification processes compared to conventional high molecular weight ligands.
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 approach results in nanoparticles with improved dispersion stability and a smaller hydrodynamic diameter, suitable for applications like MRI contrast agents, with enhanced biocompatibility and long-term stability in aqueous solutions.
Implementation Method 1
nanoparticles having a monosaccharide-phosphate or its derivative adhered to the surface thereof
Data Source
AI summary
Disclosed are a composition including hydrophilic nanoparticles that have a monosaccharide-phosphate or a derivative thereof adhered to the surface thereof, a colloidal solution of the composition dispersed in water, and a magnetic resonance imaging contrast agent including the colloidal solution. According to the present invention, nanoparticles having biocompatibility and excellent water-dispersibility can be prepared by modifying the surface of inorganic nanoparticles. The prepared nanoparticles may be effectively used in a variety of applications including, for example, in vivo imaging applications such as an MRI contrast agent, nano-electronic convergence technologies such as a quantum dot light emitting device, biomedical applications such as hyperthermia, or the like. Moreover, compared to existing nanoparticles dispersed by a dispersion stabilizer known in the art, excellent dispersion stability and a relatively small hydrodynamic diameter may be attained.