Nanoparticle Synthesis and Characterization for Biomedicine

Nanoparticles have emerged as versatile platforms for diagnostics, imaging and targeted therapy. Their unique size-dependent optical, chemical and magnetic properties allow precise interaction with biological systems at the cellular and molecular levels. Synthesis strategies encompass bottom-up and top-down approaches, including chemical reduction, microfluidic assembly and green synthesis using biological extracts. Control of nucleation and growth is achieved by selecting appropriate reducing agents, stabilising ligands and reaction parameters, yielding particles with uniform size, shape and surface chemistry. Characterisation techniques such as transmission electron microscopy, dynamic light scattering, X-ray diffraction and spectroscopic methods are essential to confirm morphology, crystallinity, surface charge and functionalisation. Recent progress has focused on environmentally benign protocols, scale-up feasibility and the integration of multifunctional coatings for concurrent drug delivery, imaging and biosensing. Surface modifications—from polymers and peptides to inorganic shells—enhance colloidal stability in physiological media, facilitate receptor-mediated targeting and modulate release kinetics. The integration of therapeutic payload and imaging capability in a single nanosystem is carefully balanced against potential toxicity and immunogenicity. Rigorous physicochemical evaluation and biological assays underpin the design of clinically viable formulations. Emerging trends include stimuli-responsive release triggered by pH or temperature shifts and biomimetic coatings to evade immune clearance. Together, these advances are setting the stage for personalised nanomedicine solutions with improved efficacy, safety and translational potential.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Nanoparticle Synthesis and Characterization for Biomedicine publication trend

The graph below shows the total number of articles in nanoparticle synthesis and characterization for biomedicine across all publications each year (not limited to Nature Index journals).

Technical terms

Nanoparticle: A solid particle with dimensions in the 1–100 nanometre range, exhibiting size-dependent physical and chemical properties.

Block copolymer: A polymer composed of two or more chemically distinct segments that can mediate nanoparticle nucleation and stabilisation.

Surface plasmon resonance (SPR): The collective oscillation of electrons at the surface of a metallic nanoparticle in response to incident light, used to characterise size and shape.

Polyelectrolyte coating: Layer-by-layer deposition of charged polymers on nanoparticle surfaces to control colloidal stability and interaction with biological media.

Zeta potential: The electrostatic potential at the slipping plane of a particle in suspension, indicating colloidal stability.

Dynamic light scattering (DLS): A technique to measure the hydrodynamic diameter and size distribution of nanoparticles in liquid suspensions based on light scattering.

References

1. UV-Accelerated Synthesis of Gold Nanoparticle–Pluronic Nanocomposites for X-ray Computed Tomography Contrast Enhancement. Polymers (2023).
2. Biomedical applications of polyelectrolyte coated spherical gold nanoparticles. Nano Convergence (2019).
3. Solvent assisted size effect on AuNPs and significant inhibition on K562 cells. RSC Advances (2019).