Microneedle Quality, Made Visible with SEM

Microneedles create temporary micro-channels through the stratum corneum, enabling targeted intradermal delivery with higher transdermal efficiency. They are rapidly transforming skincare, immunotherapy, and vaccination.

2025-12-09

The SEM images here show a well-ordered array of conical microneedles: fine terraced striations and good roundness on the sidewalls are clearly resolved, with sharp apices. Small edge chips on individual needles and alignment marks on the substrate are also captured. Acquired at a long working distance (WD), the images benefit from large depth of field and strong 3D relief, allowing rapid assessment of across-row uniformity and quick detection of outliers.

For a range of medical products, SEM can rapidly evaluate micro-morphology and surface roughness, measure critical dimensions, verify coating and surface-treatment quality, and identify foreign particles via elemental analysis. It underpins product quality inspection and process-reliability evaluation.

From proof-of-concept to mass-production release, SEM builds a quantitative, traceable evidence chain for microneedle R&D and QA. Bring your samples for a live demo and make every microneedle reliably visible.

The images in this article were captured with Shining Scientific TT-SEM: SC-TS100 series.

Shining Scientific SEM highlights

High resolution: 5.0 nm, up to 300,000× magnification.
Extra-large chamber: Supports large parts and batch holders to boost inspection throughput.
Wide accelerating-voltage range: Meets diverse imaging and EDS needs.
Flexible Z-axis: Switch imaging/analysis modes without removing the sample.
Dual navigation: Chamber camera + navigation camera for intuitive height and position targeting.
Multi-language, intuitive GUI: New users and experts can both obtain high-quality images with ease.