Imagine a 17th-century commander facing an enemy, armed with technology that today’s scientists can’t reproduce. Sounds crazy, right? Believe me, it isn’t.
When we think of nanotech, we picture images of sophisticated microscopic equipment and high-end tech laboratories.
But what we often don’t know is that more than 400 years ago, nanotech was used. Not by scientists to conduct experiments, but by blacksmiths in caves to forge swords.
These are the Damascus swords.
Damascus swords used military technology so advanced that the swords could slice through armour, bend 90 degrees without snapping and literally sharpen themselves during combat.
Modern swords are usually hard so that they stay sharp or flexible to prevent shattering. Damascus swords were both. Blacksmiths used ultra-hard micro wires of wootz steel to make the brittle core, keeping the sword rigid. Surrounding the wires were tubes of pure carbon – carbon nanotubes. Carbon nanotubes are cylinders made of hexagonally arranged carbon atoms, enhancing their elasticity and tensile strength. When the sword hit a shield, the nanotubes would absorb the kinetic energy, trapping the crack and saving the weapon.
Most swords become dull due to friction. Damascus swords used differential erosion technology to last 20% longer. Simply put, differential erosion tech allowed blacksmiths to etch intricate micro-patterns. This also influenced the sword design, as it moved towards more sabre geometries, with alternating bands of soft metal and nano-reinforced hard metal.
All of these techniques lead to one question: did ancient blacksmiths really invent nanotechnology? As per the modern definition of nanotechnology, no. Nanotechnology is the science of building, controlling and manipulating matter typically between 1 and 100 nanometers. But they did something remarkably more advanced – they learned how to manipulate matter on microscopic scales. It wasn’t magic. It was just a bunch of people refusing to stop experimenting with materials science, centuries before we even had a name for it.
And yet, there is still something unsettling about the story of these swords. The blades can be studied today, but the process behind their invention remains lost, passed down through blacksmith after blacksmith. And thus, that 17th-century commander wasn’t holding any advanced technology – he was holding a piece of the past that we’re still trying to understand.
– Akshara Aggrawal