News

High-end research microscopes have long been dominated by overseas brands. Yet in recent months, Chinese-made super-resolution microscopes have delivered a cluster of breakthroughs: resolution below 50 nanometres, live-cell imaging, and key components that are now fully domestic. For universities and research institutes in China, these developments mean more than just another option.

1. Below 50 nm, and still live

Super-resolution microscopy pushes resolution far beyond the optical diffraction limit of about 200 nanometres, revealing fine structures inside cells. Recently, Ruifei Scientific Instruments, based in Taicang, Suzhou, brought its stimulated emission depletion (STED) super-resolution microscope below 50 nanometres of resolution, and delivered its first system. Fifty nanometres is roughly one two-thousandth the diameter of a human hair.

Even more notable than the number is its support for live-cell dynamic imaging — not freezing cells to look at them, but watching living cells change over time. In life-science research, seeing static structure and seeing a dynamic process are two entirely different levels.

2. Key components 100% domestic

Another advance comes from Ningbo: a super-resolution microscope jointly developed by Yongxin Optics and Zhejiang University reaches 60 nanometres of resolution, with key components 100% made in China. That means critical links — from light source and objective to detector — no longer depend on imports.

3. Why this matters

Super-resolution microscopes are high-end tools for life science and materials science, and were once monopolised by a handful of overseas brands. Buying from abroad meant high prices, and also long lead times and slow service — when a system breaks down, waiting for an overseas engineer often costs weeks.

Domestic systems matter not just because they are cheaper:

• More predictable delivery — no long queues for imported equipment;

• Faster service — local engineers respond quickly and repair cycles are shorter;

• Better fit for local practice — software, interfaces and training can all be localised.

The gap must be acknowledged, though. The hardest part of scientific instruments is not building the first unit, but making the hundredth as accurate as the first. Stability, consistency and long-term reliability are the real divide between "domestic" and "import replacement".

4. Advice for buyers

For universities and research institutes, the "import or nothing" mindset is no longer necessary. When selecting a system, focus on:

• Actual need — routine teaching and research, or frontier work demanding ultra-high resolution?

• Service response — are there local engineers and adequate spare parts?

• Cost of ownership — consumables, fluorescent probes and maintenance;

• Trial verification — ideally test with your own samples and judge from the images.

Conclusion

From "being able to build one" to "delivering them reliably", Chinese high-end microscopes are crossing the most critical threshold. For domestic laboratories, the growing number of choices is good news in itself.