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Three-Dimensional Particle Shape Analysis Using X-ray Computed Tomography: Experimental Procedure and Analysis Algorithms for Metal Powders
Published on: December 4, 2020
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On the Core-Shell Nanoparticle in Fractional Dimensional Space
A Ali1, M A Ashraf1, Q A Minhas1
1Department of Electronics, Quaid-i-Azam University, Islamabad 45320, Pakistan.
Materials (Basel, Switzerland)
|May 28, 2020
Summary
Investigating core-shell nanoparticles in fractional dimensional (FD) space reveals their potential for biosensing. Altering the FD parameter and shell material (gold, silver) tunes surface plasmon resonance peaks for enhanced detection capabilities.
Area of Science:
- Nanotechnology
- Materials Science
- Biomedical Engineering
Background:
- Core-shell nanoparticles are crucial for biomedical applications like targeted drug delivery and sensing.
- Understanding nanoparticle behavior in fractional dimensional (FD) space is key to optimizing their performance.
- Surface plasmon resonance at noble metal-silicon dioxide interfaces is vital for sensing applications.
Purpose of the Study:
- To investigate the polarizability and scattering characteristics of dielectric/metallic core-shell nanoparticles in FD space.
- To analyze the impact of varying FD parameters on surface plasmon resonance and optical properties.
- To evaluate the suitability of different metallic shells (aluminum, gold, silver) for biosensing applications.
Main Methods:
- Theoretical investigation of core-shell nanoparticles (SiO2 core with Al, Au, or Ag shells) in FD space.
- Analysis under Rayleigh scattering mechanism for sub-wavelength dimensions.
- Calculation of polarizability, scattering and absorption cross-sections, and extinction coefficients.
Main Results:
- Increased FD parameter generally causes blue-shifts in resonance peaks.
- Gold and silver shells induce significant shifts in resonance peak wavelengths.
- Optical properties and scattering features are strongly influenced by the FD parameter.
Conclusions:
- Fractional dimensional space significantly affects the optical properties of core-shell nanoparticles.
- Gold and silver shells offer tunable resonance peaks, making them highly suitable for advanced biosensing.
- This study provides insights into designing nanoparticles for enhanced biomedical sensing applications.
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