Advanced Photoporation: Micro‐Nanostructures for Size‐Specific Highly Efficient Biomolecular Delivery

Why It Matters

A size‑focused taxonomy lets researchers match the optimal photoporation platform to specific therapeutic cargos, accelerating precision gene‑editing and microbiome‑based treatments. This speeds non‑viral delivery adoption across biotech and clinical pipelines.

Key Takeaways

• Size-centric classification improves delivery strategy selection
• Microstructures excel for small molecule transport
• Nanostructures enable large biomolecule and bacterial delivery
• Laser parameters dictate membrane permeabilization efficiency
• Scalability and biocompatibility remain translation hurdles

Pulse Analysis

Photoporation has gained traction as a non‑viral alternative to viral vectors, offering precise, minimally invasive entry of biomolecules into cells. Traditional classifications of photoporation techniques have focused on laser wavelength or substrate material, obscuring the practical question of which approach best suits a given cargo size. By reorganising the field around biomolecular dimensions—from sub‑nanometer metabolites to micrometer‑scale bacterial assemblies—the reviewed framework provides a decision‑tree that aligns delivery efficiency with therapeutic intent, a shift that resonates with the broader push for personalized medicine.

The review delves into the physics of light‑matter interaction, emphasizing how micro‑ and nanostructured platforms modulate laser‑induced membrane permeabilisation. Key material parameters—such as dielectric constant, surface charge, and aspect ratio—govern the intensity and spatial confinement of the photothermal or photomechanical effects that create transient pores. For small molecules, planar or micro‑patterned substrates deliver high throughput with modest laser fluence, whereas nanostructures like gold nanorods or porous silicon enable the higher field enhancements needed to ferry large nucleic acids, protein complexes, or even whole bacteria. Optimising pulse duration, repetition rate, and beam shaping further refines pore size and resealing kinetics, directly impacting cell viability and cargo functionality.

Despite these advances, translating size‑adaptive photoporation from bench to bedside faces hurdles. Large‑scale manufacturing of uniformly engineered micro‑nanostructures, ensuring batch‑to‑batch reproducibility, and meeting stringent biocompatibility standards remain open challenges. Moreover, regulatory pathways for devices that combine optical hardware with consumable nanomaterials are still evolving. Ongoing research is targeting scalable fabrication techniques, real‑time monitoring of pore dynamics, and integration with microfluidic platforms to enable high‑content screening. As these gaps narrow, photoporation could become a cornerstone technology for gene therapy, vaccine delivery, and microbiome engineering, offering a versatile, virus‑free route to intracellular therapeutics.