Add to favorite
 
123
Subscribe to our Newsletters Subscribe to our Newsletters Get Daily Updates RSS


Sunscreen Made of Silicon Nanoparticles
June 2, 2009 23:10


Nanosilicon

Traditional sun protecting creams and lotions are based upon mineral filters, mainly titanium or zinc oxides. Recently sunscreen producers started adding silicon to their protective emulsions. Is this element effective enough against furious sun?

Russian researchers from the laboratory of nano-disperse materials (Moscow Institute of Steels and Alloys) studied the ability of silicon nanoparticles to resist ultraviolet radiation. Experimental results were then compared to that for popular sun protection creams, which contain titanium and zinc oxides.

Researchers studied transmittance spectra of sunscreen, containing oxides of zinc and titanium, and sun protection suspensions with nanopowder of silicon. Wavelength range varied from 190 to 1000 nanometers. Spectrophotometric experiments helped estimating the ability of mentioned sunscreens to transmit (or reflect) light in ultraviolet, visible and near infrared radiation ranges.

It is now a long time, since science started regarding silicon as an appropriate ingredient for new generation of cosmetic products. Not a single organism is able to live without silicon. Silicon is biologically compatible with skin, dermatologically safe and forms a thin protective film, which eliminates negative effects of ultraviolet radiation.

 

 

 
Russian scientists admit that various traditional sun protective creams and lotions, which are based upon titanium and zinc oxides, effectively resist ultraviolet radiation. However, they also reflect useful “mild” ultraviolet and make skin look pale, since they diffuse visible light. Moreover, these materials are photocatalysts, which release electrons under effect of ultraviolet radiation. Such behaviour leads to forming active oxygen radicals, which are considered to be dangerous for health.

Recent research showed that silicon nanopowders with particles, sized from 20 to 40 nanometers, are a good alternative to existing sun protective materials. All samples of silicon nanopowder totally absorbed hard (100—280 nanometers) and middle (280—315 nanometers) UF radiation, while partly transmitting soft (315—380 nanometers) ultraviolet. Said nanopowder is almost transparent for visible light, transmitting up to 95% of this type of radiation (700—1000 nanometers), totally biocompatible and safe for living organisms. All fantastic properties this material owes to a protective film of silicon oxide, which forms on the surface of the particles and is known to be safe, since it is included tin toothpastes, for instance.

Nano-silicon can be a good base for new generation of cosmetic products – safe, optically transparent, resistant to unwanted range of ultraviolet radiation and transmitting waves, necessary for vitamin D synthesis in skin. These properties of nanosilicone can protect from ultraviolet not only human skin, but also various organic materials, which human beings actively used – wood, polymers, plastic, etc.

Source: Living Systems

Kizilova Anna


Tags: health     

Next Previous

You might also find interesting:

Antioxidants Help Restoring Eyesight Branched Peptides Instead of Antibiotics Talking Ice Scientists Designed New Way of Infrared Absorption What should First be Cured Ulcer or Nerves?









Comment on our site


RSS   twitter      submit



TAGS:
Giaginskaya  Russian business  State Duma  Buryatia  Russian Cinema  Black Sea  Concerts in St. Petersburg  contemporary art  business  Visa   Mercedes-Benz Fashion Week Russia  Andrei Kirilenko  Russian tourism  St. Petersburg  Odessa  Russian science  Stavropol Territory  Spartak Moscow  Russian oil  Pskov Region  Russian music  Bio Printing  Russian Kremlins  Russias Central Ban  Boston bombings  Russian mountains  Manon  Sultanna Frantsuzova  Chaliapin Opera Festival   Russian tourists  Music Festivals in Russia  Andrey Krupinin  Russian Metro  Ryazan Region  Moscow  Unusual Monuments in Russia  Russian directors  Russian economy  Festivals  Yelabuga  Street Art  Russian forests  Exhibitions in Moscow  puzzle  Dmitrovsk Alps  Russian Animation  Russian monastery  Gdov  Russian scientists  Samara 


Travel Blogs
Top Traveling Sites