Swiss Researchers Use Gold to Pinpoint the Location of Cancer Cells -

I once heard some knucklehead on a mainstream financial news network claim that gold is “a useless rock.”
Well, Swiss researchers have discovered how to use that useless rock to precisely detect the location of cancer cells.
Scientists at the Swiss Nanoscience Institute (SNI) Network based at the University of Basel have developed a “surface-modification strategy” for gold nanoparticles. The resulting nanoparticles, or “nanotags,” generate a measurable optical signal that pinpoints cancer cells, opening the door for “more precise cancer detection and future surgical applications.”
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Gold creates a stable foundation for this tagging technology. The metal works well in this capacity because it resists chemical breakdown, provides a stable surface for attaching other molecules, and amplifies the light signals used to detect cancer cells.
Researchers coated the gold particles with polyethylene glycol (PEG) conjugates containing antibodies that recognize structures on cancer cell surfaces. Once the nanoparticles bind to cancer cells, they create an “optical fingerprint” that scientists can detect with a Raman microscope.
According to a press release, “The researchers targeted the epidermal growth factor receptor (EGFR), a protein that is expressed on the surface of certain ovarian cancer cells.”
Researchers called specific targeting and nanoparticle stability in a single nanotag “challenging.”
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“Researchers from the FHNW School of Life Sciences, the Department of Biomedicine at the University Hospital Basel and the Department of Chemistry at the University of Basel have now developed a two-step coating process for 60 nm gold nanoparticles that addresses these challenges.”
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I’ll spare you any more technical jargon. If you’re interested, <a href="https://nanoscience.unibas.ch/en/news/details/nanotags-fuer-praezisere-krebschirurgie-und-diagnostik-goldnanopartikel-mit-optimierter-beschichtung-zur-gezielten-erkennung-von-eierstockkrebszellen/" target="_blank" rel="noopener">you can read more here</a>. But suffice it to say, this is a significant development in the realm of cancer detection and treatment.
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“This optimized coating strategy provides a promising basis for developing SERS nanotags for more precise cancer diagnostics. In the future, such nanotags could potentially be used during surgery to help identify tumor tissue and distinguish it from surrounding healthy tissue.”
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Not bad for a useless metal with “no utility.”
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While gold is primarily a monetary metal, it has a wide variety of practical uses, from jewelry to electronics.
In fact, gold is one of the world's most useful metals. Due to its utility, coupled with its scarcity, gold is also one of the most valuable metals in the world.
In the first place, gold is strikingly beautiful. It has captured eyes for thousands of years. That’s why people worldwide love to wear gold. About 44 percent of gold demand is for jewelry production. Roughly 1,550 tons of gold were used in jewelry fabrication in 2025.
But gold isn’t just pretty. The metal’s inherent physical and chemical properties make it useful in many industrial and technological applications.
This is why the tech sector increasingly turns to gold.
In 2025, industrial and technical applications used 222.8 tonnes of gold.
In fact, gold would probably be used even more if it weren’t so rare and expensive. 
Gold is also important in medicine. Its inherent stability and unique optical properties make it ideal for diagnostic testing. The World Gold Council said that gold is “at the heart of the hundreds of millions of Rapid Diagnostic Tests (RDTs) that are used globally every year."
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“This well-established and critically important technology has changed the face of disease diagnosis in the developing world over the last decade.”
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Gold nanoparticles are used in testing for malaria, HIV, hepatitis, and other illnesses.
Gold has even been used in some exotic applications. In 2018, a team of Chinese researchers partially restored the sight of blind mice by replacing their deteriorated photoreceptors – sensory structures inside the eye that respond to light – with nanowires made of gold and titanium.
The point is that gold is far from useless. Don't let anybody tell you that it is!

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