Why is each gecko the master of the film?

Fly around the high -rise building,

Free shuttle in the flying traffic,

Quickly crawl on smooth glass floor,

The "Spider -Man" body is "hot", hot eyes,

If we can also walk the wall like him,

Is it cool?

In fact, this dream no longer dreams,

It's just that inspiration does not come from the spider of Tsus,

It is a gecko with a lot of feet.

1

Gecko "Why" the eaves go wall?

In nature, many animals have practiced one hand to climb the wall like a flat ground. Spiders, ants, flies, gecko, etc. have this effort. Crazy is just as good as the gravity.

Gecko crawling

If the spider and the flies are because of the light weight, you can hook the wall with a small paw, and the hair (or hair -shaped) in the paws can be adsorbed on the wall to overcome its own gravity and realize the "eaves walking the wall". What do they want to do so much?

In fact, geckos use the same or even more exquisite techniques as spiders.

Taking the Da Shou Palace as an example, it is the largest gecko in Asia, with a body length of 30 to 40 cm and a weight of 200 to 300 grams.

We can see its soft foot pads with the naked eye. We show a strip of arc -shaped folds, about 1 to 2 mm in length, just like the soles of the shoe shoes, but it is much more fine.

In the 1960s, scientists used scanning electron microscopes to find that their feet showed a complicated and complex adhesive system structure with multi -class, multi -fiber surface.

Each toe of the gecko has millions of extremely detailed "rigid hair", each rigid hair length is about 30 to 130 microns (1 micron = 0.001 mm), and the diameter is about one tenth of the diameter of human hair diameter. Essence

And the end of each rigid hair, the fork forms hundreds of small shovel fluff (100-1000), the size of the length and width direction of each fluff is about 200 nanometers (1 nanometer = 0.001 micrometer), and the thick About 5 nanometers.

Scientists estimated that the number of rigid hairs per square centimeter of geckon was as many as 10,000 roots, while the number of rigid hair on the feet of a gecko of a large palace was about 6 million.

This fine structure makes the distance between the rigidity and the surface molecules of the object is very close, which generates molecular gravity, that is, Van Dewali.

(It is also said that the geckon climbing the wall is used to use the Casimir effect. These two claims are actually right. Van Dewali is a micro -angle description of the Casimir effect. Price.)

2

The magical "Van Dewali"

You can stick it without glue

Fan Dehua is an attractiveness that is produced between molecules or atoms. Because this gravity is too weak, no one pays attention to it. For example, the new mobile phone screen protective film is "sticky" on the phone screen by Fan Dehua.

In fact, when we put our hands on the wall, Fan Dehuali is also generated, then why can we remove it effortlessly without feeling of being stuck. Where did Fan Dewali go between fingers and walls?

This is because your fingers do not really touch the wall, or the actual contact area is too small.

The surface of the wall seems to be flat, but if it is enlarged thousands of times, you will find that it is actually uneven. Your fingers are only placed on the top of the wall of the wall. Most of the molecules on the fingers are actually far from the wall. The attractiveness formed is not worth mentioning at all. Therefore, your hands are not adsorbed on the wall.

Different from the previous situation, the gecko's toe reaches nano -level rigidity, so that the gecko can easily achieve a near -perfect combination with various surfaces.

Although the power of each rigid hair is insignificant, it is considerable to accumulate.

Each gecko can produce the attraction of a grain of sand between the pills at the end of the hair and the wall surface. The area of ​​each foot of a large palace is about 227 square millimeters, with about 3 million rigid hair, which can produce a adsorption force of about 20 Newton, and its gravity is only about 3 Newton.

Therefore, with only one foot, they can also grab the wall firmly.

At this time, some people were asking, since the stickiness is so powerful, how can the gecko "pull the foot"?

In fact, the gecko uses the method of unveiling the mobile phone film. Through a high -speed camera, scientists observed that geckon starts with a tip of the toe, which is equivalent to opening a corner first. It takes only a short moment from the bending toe tip to the entire foot.

3

Move your feet

Do not bring a sand grain

The environment of gecko life is not so clean, dust, pollen particles, these are enough to make the geckos lose their feet, but I haven't seen any gecko fell from the ceiling. Intersection

Then we have to understand what "lotus leaf effect" is.

"Lotus leaf effect" refers to a super hydrophobicity on the surface. This "hydrophobicity" refers to the physical properties of a molecule and water exclusion. This is why we can often see the rolling of water droplets on the lotus leaf back and forth.

The rigid and fluffy of the gecko's feet has similar self -cleaning ability. They never clean up their feet, and the soles of their feet will not automatically secrete liquid. But no matter how dirty objects are walking, when it takes a few steps, the dirt on the feet will automatically fall off.

After stepping on the dirt, the particles of dirty are only accumulated on the surface of the rigid hair instead of sticking to the rigid hair. Therefore, after accumulation to a certain degree, dirty particles will fall off under the action of gravity. 4

Can we also "stroll"?

For us, it is obviously impossible to grow natural hair on the skin. Can you put on a spider -man suit with nano -rigid hair or gloves?

Remember the Dubai Tower of more than 800 meters high in "Mission Impossible 4"?

A Tange used the magical "gecko gloves" at the time. Although it is not as windy as Abango, in reality, "gecko gloves" have appeared. A small tool developed by Stanford University can make humans stand on the glass like Spider -Man. The climbers successfully climbed the smooth glass with it successfully.

Not only gecko gloves, but also many new technical products inspired by geckos. For example, a small invention that allows humans to climb on the transparent glass wall, allowing robots to drive a device that weighs hundreds of times more weight than themselves, as well as pliers that are convenient for astronauts for space repair.

German scientists have also developed a bionic fiber bonding material with ultra -sparse liquid. This special mushroom fluff structure can not only exclude water, but also effectively exclude any liquid, including oil, and always maintain adhesion.

The billions of years of evolution and the "survival of the fittest" have created the ability of gecko and other creatures to move on various surfaces. This ability far exceeds people's imagination. Although human beings can not reach such a level at present, as the research on the superb adhesion ability of gecko and other creatures such as geckos, I believe that our future life will become better and more interesting.

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