We humans are rather proud of our inventions. We speak confidently about the age of nanotechnology, as though we were the ones who discovered it. The truth is a little more humbling: nature has been manipulating atoms and building materials on the scale of billionths of a metre for hundreds of millions of years — and it does so more elegantly, more economically, and often more robustly than the finest laboratories on Earth manage today. To understand nanotechnology in nature and where exactly we encounter it, you needn't reach for a microscope straight away. Just look at a lotus leaf after a downpour, the iridescent wing of a butterfly, or a gecko scurrying upside down across a pane of glass. All of this is nanotechnology — it simply wasn't patented by a human.
Essential takeaways if you're short on time
- Nanotechnology means working with matter on a scale of 1–100 nanometres. One nanometre is a billionth of a metre — roughly a hundred-thousandth of the thickness of a human hair.
- Nature was the first nanotechnologist. The lotus, the gecko, the butterfly, the spider, and mother-of-pearl all solve their problems with nanostructures shaped by evolution.
- Biomimicry is the field that studies and imitates nature's nanostructures — from self-cleaning façades and dry adhesives to entirely new materials.
- The lotus effect gave rise to hydrophobic (water-repelling) and self-cleaning surfaces that now protect glass, cars, and textiles.
- Nanofibres show that humans can catch up with nature too — they form a membrane that lets air through but stops dust mites and allergens.
What does "nano" actually mean?
The prefix "nano" comes from the Greek nános — dwarf. It is a fitting origin. One nanometre is one billionth of a metre. To grasp this almost unimaginable smallness: if a single nanometre were the size of a marble, a human head would be as large as the entire planet Earth. Nanotechnology is the set of methods that allows us to manipulate atoms, molecules, or small clusters of them, thereby creating materials and objects with properties that matter simply does not exhibit on an everyday scale. Researchers typically work in the range of 1 to 100 nanometres.
And herein lies the catch that often surprises people: at this scale, our everyday experience ceases to apply. A material that is normally brittle can suddenly become flexible. A surface that ought to be wettable repels water entirely. Colour arises not from pigment, but from the way light bends across invisible structures. Nature has mastered these tricks to perfection — and we are only just beginning to learn them. If you would like to understand how nanofibres are made and what they can achieve, read our separate article on what a nanofibre is.
Biomimicry: nanotechnology borrowed from nature
The discipline that studies nature's solutions and translates them into engineering is called biomimicry (from the Greek bios — life, and mimesis — imitation). It is no modern curiosity. Leonardo da Vinci sketched flying machines based on birds' wings, and Velcro was born because a Swiss engineer, Georges de Mestral, grew tired of plucking burdock burrs from his dog's coat. When he examined them under a magnifying glass, he discovered tiny hooks — and secured his patent.
Modern biomimicry, however, delves far deeper, right down to the level of individual molecules and nanostructures. Today's scientists do not merely copy the shape of a wing, but rather the way the chitin on its surface is arranged on a scale of hundreds of nanometres. Nature, after all, had no expensive raw materials and no high-temperature furnaces at its disposal. It had to make do with what was at hand — water, calcium, proteins — and yet it produced materials we still cannot fully replicate. That is why it remains the greatest teacher any nanotechnologist could ask for.
The lotus effect: the most famous self-cleaning surface on Earth
No natural nanostructure has shaped engineering quite as powerfully as the surface of the lotus leaf. Lotuses grow in muddy tropical waters, yet their leaves remain perfectly clean and dry. The botanist Wilhelm Barthlott uncovered this secret in the late twentieth century, naming it the lotus effect.
The surface of the leaf is not the smooth plane it appears to be from a distance. Under a microscope, you see a forest of tiny bumps roughly 10 micrometres tall, which are themselves covered in even finer waxy outgrowths around 100 nanometres in size. This two-level (hierarchical) structure means a droplet of water has nothing to cling to — instead of spreading out, it pulls itself into an almost perfect sphere and rolls away. Because it picks up every speck of dirt in its path, the leaf effectively cleans itself. We call such an extremely water-repelling surface superhydrophobic.
Engineers quickly realised how valuable such a surface would be in a world plagued by rain, grime, and fog. Today, you will find the lotus effect applied to façade paints, self-cleaning glass, car-care products, and technical textiles. The principle is always the same: create a nanostructure to which neither water nor dirt can adhere. The very same logic underpins modern nanotechnology surface protection that you can apply yourself to windows or bodywork — the surface becomes smooth "at the molecular level", allowing water to run off and carry the dirt away with it. Before any such product reaches our shop, we test it rigorously in-house, turning down far more than we ever stock.
The gecko: a master of sticking without any glue
The gecko performs a feat that looks akin to magic — it scurries across glass, traverses ceilings upside down, and holds fast even by a single foot. Yet, there is not a drop of adhesive on its toes. How is this possible?
The answer, once again, lies at the nanoscale. A gecko's toes are covered with millions of microscopic keratin hairs known as setae. Each one branches at its tip into hundreds of even finer projections, roughly 200 nanometres across. When such an enormous number of tiny tips touches a surface, van der Waals forces begin to act between them and the substrate — weak intermolecular attractions that mean little on their own, but when multiplied by the billion, can support the weight of an entire lizard. There is no chemistry involved; it is pure physics on the scale of atoms.
This principle now inspires the development of "dry adhesives" and gripping materials that hold fast and then release without leaving any sticky residue behind. In robotics, climbing equipment, and materials for space exploration — wherever you need a surface that bonds through the force of molecules alone and requires no liquid — the gecko leads the way. Incidentally, thanks to this very same structure, the surface of a gecko's foot is also self-cleaning, much like the lotus leaf.
Butterfly wings and colour without colour
When you gaze at the brilliant blue wing of a Morpho butterfly, you are witnessing one of the most beautiful illusions in nature. That blue hue is not created by any pigment. There is no blue dye on the wing whatsoever. The colour arises purely from the way light bends and reflects off nanostructures of chitin, whose dimensions perfectly match the wavelengths of visible light.
This phenomenon is known as structural colour, and its hallmark — a surface that shifts hue depending on the viewing angle — is what we call iridescence (the rainbow play of colour seen on a soap bubble or a bird's feather). Morpho butterflies carry natural photonic crystals on their wings: minuscule, regular structures that allow only a specific wavelength of light to pass through. The result is a dazzling blue that never fades, simply because there is no dye to oxidise.
For engineers, this is a minor miracle. Structural colours never fade, require no toxic pigments, and can be "switched" by altering the underlying structure. Following nature's lead, scientists are developing durable coloured coatings, advanced displays, sensors sensitive to the slightest change in temperature, and sophisticated anti-counterfeiting features. Metallic-sheened beetles and starlings show off similar structural colours. Nature has, quite literally, crafted colour out of light and shape alone — and we are only just deciphering the recipe.
Spider silk: stronger than steel, lighter than cotton
If you were hunting for the finest material on Earth measured by its strength-to-weight ratio, spider silk would be among the absolute front-runners. A strand of spider's web, at the same thickness, is stronger than steel and tougher than Kevlar — it can absorb an enormous amount of energy before snapping. Furthermore, the spider "manufactures" it at room temperature, from proteins dissolved in water, without generating a single gram of waste.
The secret, once again, lies in the nanostructure. Spider silk is composed of protein chains that fold, in specific places, into tiny, extremely ordered nanocrystals linked by more flexible stretches. This combination of hard and soft regions at the nanoscale gives the fibre both immense strength and elasticity — properties that rarely go hand in hand in conventional materials.
Scientists have spent decades trying to replicate spider silk. It is no easy task: the protein alone is not enough; what matters is precisely how it assembles at the nanoscale. In 2024, researchers at the Karolinska Institutet demonstrated that spiders use a special natural "molecular amplifier" to strengthen their thread — and this same trick was harnessed to produce synthetic silk via a non-toxic route. Artificial spider silk could one day replace synthetics in medical sutures, composites, and protective clothing. The fact that nanofibres are not mere theory but a highly effective working product is proven by our own Nanocotton bedding for allergy sufferers.
Mother-of-pearl and sea-urchin spines: strength from brittle ingredients
One of the greatest puzzles of natural engineering is how nature manages to build a hard, tough material out of thoroughly brittle ingredients. Take mother-of-pearl — the lustrous inner layer of seashells. It consists predominantly of calcium carbonate (essentially limestone), which on its own cracks easily. But nature lays it down in thousands of wafer-thin nanolayers interleaved with a flexible protein, much like bricks bound with mortar. When pressure is applied to such a material, any crack does not travel straight through; instead, it zigzags between the layers, dissipating its energy. As a result, mother-of-pearl is many times stronger than the raw limestone from which it is built.
Sea-urchin spines employ a similar trick. They are made of calcite, which is usually brittle and prone to snapping, yet thanks to their internal nanostructure, they are remarkably robust. Materials scientists have drawn on this architecture to develop exceptionally resilient concrete. From such natural "nanocomposites", we are learning to build materials that are simultaneously strong and light — the ultimate dream of every aircraft designer, car maker, and engineer of protective gear.
Nanofibres: how humans caught up with nature
Until now, nature has played the teacher and the human the pupil. With nanofibres, however, the roles drew level for the first time — and the Czech Republic was right at the forefront. The technology for the industrial production of nanofibres (the Nanospider device) was developed by scientists at the Technical University of Liberec, one of the true cradles of the nanotechnology industry.
A nanofibre is a thread a thousand times thinner than a human hair. When you construct a layer from such fibres, you create a membrane full of minuscule pores. And therein lies its magic: the pores are large enough to let air and water vapour pass through, yet small enough to block the particles you want to keep out. It acts as an impenetrable barrier — much as the forest of bumps on a lotus leaf keeps water at bay.
In Nanocotton anti-allergy bedding, this nanofibre membrane is hidden inside certified organic cotton. Its job is simple and decisive: to form a barrier that keeps dust mites and their allergens away from your skin and airways. At the same time, the bedding remains entirely breathable and pleasant to sleep in — you don't swelter under an airtight film, as was often the case with older "anti-allergy" covers. This physical barrier function is the true advantage, offering far more reliable protection than advice along the lines of "just wash it at 60 °C". The very same membrane protects the mattress itself in our Nanocotton fitted bed sheet. If you would like to know how Nanocotton is made and who it suits best, we have a detailed guide to bedding for allergy sufferers.
Nanofibre in practice
Nanocotton® bedding for allergy sufferers
Certified organic cotton with a nanofibre membrane that forms a barrier against dust mites and allergens — while staying breathable.
View price →Nature as a factory for nanoparticles
Nature excels not only at building complex structures — it also produces a vast abundance of nanoparticles. They form during volcanic eruptions, in seawater, in sediments, in glacial deposits, and in ores. Among them are nanoparticles of quartz, calcium carbonate, iron oxides, and silver. Some of these are already being put to use by humans — in water purification or agriculture, for instance.
What once formed by chance in the depths of the oceans and the bellies of volcanoes, we can now produce and measure deliberately. And therein lies the whole essence of modern nanotechnology: we are not inventing something that goes against nature, but rather learning to imitate what nature road-tested long ago. If you are wondering whether any risks accompany these advancements, read our article on whether nanotechnologies are safe.
Why it pays to learn from nature
Nature's nanotechnologies hold one enormous advantage: they were shaped over millions of years of rigorous evolutionary testing, where only what genuinely worked survived. No human team of engineers has that much time or that many attempts. So, when we see that the lotus leaf cleans itself, that the gecko clings to glass by the sheer force of molecules, and that the spider spins a thread stronger than steel, we are looking at solutions that have already been proven — we need only understand them.
That is precisely why biomimicry is one of the most promising directions in materials research today. And it is exactly why we at nanoSPACE believe that nanotechnology is no "unnatural science". Quite the opposite — it is the most natural thing in the world. We are simply, slowly, catching up with what nature mastered long before us.
Frequently asked questions
What is nanotechnology, explained simply?
Nanotechnology is the set of methods that allows us to work with matter on the tiny scale of 1 to 100 nanometres (billionths of a metre). At this scale, matter takes on entirely new properties — a surface may repel water, colour may arise without pigment, or a material may be both incredibly strong and light at once.
Where does nanotechnology occur in nature?
Practically everywhere. We find it on lotus leaves (a self-cleaning surface), on geckos' toes (adhesion without glue), on butterfly wings (colour without pigment), in spider silk, in the mother-of-pearl of shells, in sea-urchin spines, and in the form of nanoparticles in seawater, volcanic ash, and sediments.
What is the lotus effect?
The lotus effect is the self-cleaning ability of the lotus leaf's surface. The surface features a two-level nanostructure to which water cannot cling — it pulls itself into a sphere, rolls away, and carries off any dirt with it. This principle is now used in self-cleaning façades, glass, car-care products, and technical textiles.
What is biomimicry?
Biomimicry is the scientific field that studies solutions that arose in nature and translates them into engineering. Examples include Velcro inspired by burdock, self-cleaning surfaces modelled on the lotus, dry adhesives based on geckos, and artificial spider silk. Modern biomimicry often operates at the level of nanostructures.
How are nanofibres connected to nature?
Nanofibres show that humans can, in some respects, catch up with nature. They create a membrane with minuscule pores that allows air and moisture through but stops microscopic particles. Just as nature builds barriers using nanostructures, the nanofibre membrane is used in Nanocotton anti-allergy bedding, where it forms a highly effective barrier against dust mites and allergens.
Sources
- Bhushan, B. (2009) 'Biomimetics: lessons from nature - an overview', Philosophical Transactions of the Royal Society A, 367(1893), 1445-1486.
- Bhushan, B. & Gupta, B. (2008) 'Biomimetic hierarchical structures for hydrophobicity, self-cleaning, and low adhesion', Philosophical Transactions of the Royal Society A, 366(1870), 1557-1574.
- Sarikaya, M. & Aksay, I. A. (2011) 'Biomimetics: Lessons from nature - An overview', Philosophical Transactions of the Royal Society A, 369(1945), 1598-1613.
- Autumn, K. et al. (2002) 'Evidence for van der Waals adhesion in gecko setae', Proceedings of the National Academy of Sciences, 99(19), 12252-12256.
- Vukusic, P. & Sambles, J. R. (2003) 'Photonic structures in biology', Nature, 424, 852-855.
- Karolinska Institutet (2024) 'New ways to strengthen biomimetic spider silk', available at phys.org.