Nucleic Acid Structure Complex for Reproducible Raman Signal
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Solution Overview
Problem
Raman spectroscopy devices face limitations due to weak signal intensity and low reproducibility, and surface-enhanced Raman scattering (SERS) methods struggle with accurate synthesis and control of nanomaterials.
Innovation Solution
Development of nucleic acid structure complexes comprising hybridized oligonucleotides with Raman-active molecules and metal particles, which are self-assembled to form polyhedral structures, enhancing Raman signal intensity through controlled attachment of metal particles and Raman-active molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If surface-enhanced Raman scattering (SERS) is used to increase signal intensity, then Raman signal intensity is improved, but manufacturing precision and structural control of nanomaterials deteriorate
Solution Approach 1:
The patent introduces nucleic acid structures as intermediary components that mediate between metal particles and Raman-active molecules. The nucleic acid structures provide defined binding sites through hybridization regions, enabling precise spatial control of metal particles and Raman reporters without requiring complex nanomaterial synthesis. This intermediary approach resolves the contradiction by achieving both signal enhancement and structural precision through biological self-assembly rather than direct nanomaterial fabrication.
Solution Approach 2:
The patent creates a composite structure combining nucleic acids, metal particles, and Raman-active molecules into an integrated complex. This composite material leverages the structural precision of nucleic acid hybridization, the signal enhancement of metal particles, and the detectability of Raman molecules, achieving both high signal intensity and manufacturing precision through the synergistic combination of different material properties.
2Device complexity
If conventional Raman spectroscopy is used, then device simplicity is maintained, but measurement precision deteriorates due to weak signal intensity
Solution Approach 1:
The patent changes the physical and chemical parameters of the detection system by introducing metal particles and Raman-active molecules into the nucleic acid complex. This parameter modification transforms the weak Raman signal into a strong enhanced signal, improving measurement precision while maintaining relative device simplicity through a straightforward complex formation process.
3Measurement precision
If SERS methods are applied to improve detection sensitivity, then measurement precision is improved, but reliability deteriorates due to synthesis difficulties
Solution Approach 1:
The patent employs self-service through the self-assembly of nucleic acid structures via complementary base pairing. The nucleic acid sequences automatically organize into defined structures with metal particles and Raman molecules attached at specific locations, eliminating the need for complex external synthesis control. This self-organizing mechanism ensures high reproducibility and reliability while achieving enhanced detection sensitivity.
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 nucleic acid structure complexes provide a reproducible and intensified Raman signal, enabling effective detection of target materials with improved reliability and sensitivity.
Implementation Method 1
surface enhanced Raman scattering or surface enhanced Raman spectroscopy (SERS), which involves repeated oxidation-reduction of a silver electrode and adsorbtion of pyridine molecules thereon in an aqueous solution. An increase in signal intensity of about 106 times has been observed by SERS.
Implementation Method 2
Raman scattering is the inelastic scattering of photons wherein the energy of incident light is changed, and denotes a phenomenon where, when light is incident on a predetermined molecular sieve, light having a wavelength slightly different from that of the incident light is generated due to a unique vibrational transition of the molecular sieve.
Implementation Method 3
a nucleic acid including a hybridization region in which a single strand and a single strand are hybridized, such that the hybridization region is double stranded
Data Source
AI summary
Provided are nucleic acid structures suitable for reproducible Raman spectroscopy, methods of preparing the same, and methods of detecting a target material using the nucleic acid structures, whereby various target materials may be analyzed by using reproducible Raman spectroscopy.