Diamond-Metallic Nanoparticle Conjugates for Super-Resolution Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fluorescent biomarkers face limitations such as low brightness, photobleaching, toxicity, and resolution constraints due to the optical diffraction limit, making them inadequate for advanced imaging and sensing applications.
Innovation Solution
The development of diamond-magnetic or diamond-metallic nanoparticle conjugates, where nitrogen vacancy centers in diamond nanoparticles are optically pumped and subjected to microwave pulses to enhance fluorescent response, allowing for sub-diffraction limit imaging and sensing of magnetic, electric fields, and pH concentration by leveraging radiative enhancement and Zeeman splitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional fluorescent biomarkers are used for imaging, then the imaging process can be performed with simple equipment, but the brightness is low and photobleaching occurs
Solution Approach 1:
The patent combines diamond nanoparticles containing nitrogen vacancy centers with magnetic or metallic nanoparticles to create composite conjugates. The diamond nanoparticle provides photostable fluorescence emission, while the magnetic/metallic nanoparticle enhances radiative decay rates through plasmonic coupling. This composite structure resolves the contradiction by achieving both high brightness and photostability simultaneously.
Solution Approach 2:
The patent modifies the radiative decay rate parameter by controlling the distance between the diamond nanoparticle and the magnetic/metallic nanoparticle. By optimizing this separation distance, the radiative enhancement is maximized, thereby increasing brightness while maintaining the inherent photostability of the nitrogen vacancy center.
2Measurement precision
If conventional fluorescent biomarkers are used, then the imaging system can be simple, but the resolution is limited by the optical diffraction limit
Solution Approach 1:
The patent replaces conventional optical microscopy with magnetic resonance imaging techniques using nitrogen vacancy centers. By detecting magnetic field interactions at the quantum level rather than relying on optical diffraction, the system achieves super-resolution imaging that bypasses the diffraction limit while using advanced but manageable imaging equipment.
Solution Approach 2:
The patent introduces magnetic field sensing capability as an additional dimension to the imaging system. By measuring magnetic field variations from individual nitrogen vacancy centers, the system achieves three-dimensional localization and super-resolution imaging beyond what conventional optical systems can provide.
3Object-affected harmful factors
If conventional fluorescent biomarkers are used, then the biomarkers are easy to obtain and use, but they can be toxic to cells
Solution Approach 1:
The patent uses diamond nanoparticles as the fluorescent core, which provide an inert, biocompatible environment. The nitrogen vacancy centers within the diamond lattice are inherently non-toxic, and the diamond material itself is chemically stable and non-reactive with biological systems, thereby eliminating cell toxicity while maintaining ease of use.
Solution Approach 2:
The patent introduces magnetic or metallic nanoparticles as intermediaries that couple to the diamond nanoparticle surface. These intermediaries enable functionalization with targeting ligands and bioconjugation while keeping the toxicological profile low, as the diamond core remains isolated from direct biological interaction.
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
These conjugates provide bright, photostable, and non-toxic emitters capable of sub-nanometer resolution imaging and sensing, enabling precise detection of local environmental parameters like magnetic fields and pH concentrations, with the ability to track individual particles and proteins within biological samples.
Implementation Method 1
The nitrogen vacancy centers can be pumped with a pump light and one or more microwave pulses can be applied. The fluorescent response of the nitrogen vacancy center can then be detected.
Implementation Method 2
one or more microwave pulses can be applied. The fluorescent response of the nitrogen vacancy center can then be detected.
Implementation Method 3
A layer of metal having a predetermined thickness can be deposited over the monolayer of diamond nanoparticles. The predetermined thickness can correspond to a radiative enhancement rate of a nitrogen vacancy center in a diamond nanoparticle.
Data Source
AI summary
Techniques for imaging a characteristic of a sample with a plurality of conjugates of diamond-metallic nanoparticles having a nitrogen vacancy center. The plurality of conjugates can be exposed to a sample and the nitrogen vacancy centers can be optically pumped. One or more microwave pulses can be applied to the nitrogen vacancy center, and a fluorescent response can be detected.