Silver Nano
Silver Nano is a trademark
A trademark, trade mark, or trade-mark is a distinctive sign or indicator used by an individual, business organization, or other legal entity to identify that the products or services to consumers with which the trademark appears originate from a unique source, and to distinguish its products or...

 name of an antibacterial
Bacteria are a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals...

 technology which uses silver nanoparticles
Silver nanoparticles
Silver nanoparticles are nanoparticles of silver, i.e. silver particles of between 1 nm and 100 nm in size. While frequently described as being 'silver' some are composed of a large percentage of silver oxide due to their large ratio of surface-to-bulk silver atoms.-Synthesis:There are...

 in washing machine
Washing machine
A washing machine is a machine designed to wash laundry, such as clothing, towels and sheets...

s, refrigerator
A refrigerator is a common household appliance that consists of a thermally insulated compartment and a heat pump that transfers heat from the inside of the fridge to its external environment so that the inside of the fridge is cooled to a temperature below the ambient temperature of the room...

s, air conditioners, air purifier
Air purifier
An air purifier is a device which removes contaminants from the air. These devices are commonly marketed as being beneficial to allergy sufferers and asthmatics, and at reducing or eliminating second-hand tobacco smoke...

s and vacuum cleaner
Vacuum cleaner
A vacuum cleaner, commonly referred to as a "vacuum," is a device that uses an air pump to create a partial vacuum to suck up dust and dirt, usually from floors, and optionally from other surfaces as well. The dirt is collected by either a dustbag or a cyclone for later disposal...

s introduced by Samsung
Samsung Group
The Samsung Group is a South Korean multinational conglomerate corporation headquartered in Samsung Town, Seoul, South Korea...

 in April 2003.


Samsung home appliances, such as refrigerators or air conditioners, have a silver nano coating on their inner surfaces for an overall anti-bacterial and anti-fungal effect. As air circulates, the coated surfaces contact with the silver ions which can resist any airborne bacteria, which in turn suppress the respiration of bacteria, adversely affects bacteria's cellular metabolism and inhibits cell growth.

Samsung says the silver nano technology sterilizes over 650 types of bacteria and that "Samsung WM1245A Washing Machine releases over 400 billion silver ions which penetrate deeply into fabrics of any kind and create a coat of sterilizing protection for a maximum of 99.99% disinfection and an added antibacterial effect of up to 30 days after washing".

According to Paul Lipscomb, Product Manager, White Goods, Samsung Australia: "The Silver Wash system means that it's no longer necessary to soak clothes in additives or wash at extremely high temperatures in order to sanitise them. This combined with Samsung front loading washing machine's industry leading water efficiency ratings of up to 5A, creates a major saving on the long term cost of running the washing machine."

In 2005 the South Korea
South Korea
The Republic of Korea , , is a sovereign state in East Asia, located on the southern portion of the Korean Peninsula. It is neighbored by the People's Republic of China to the west, Japan to the east, North Korea to the north, and the East China Sea and Republic of China to the south...

n Consumer Protection Board concluded Samsung's Silver Wash technology was exaggerated in advertisements, due to test results which showed 99.9% removal of germs by similar drum-type washers of LG Electronics
LG Electronics
LG Electronics is a global electronics and telecommunications company headquartered in Yeouido, Seoul, South Korea. The company operates its business through five divisions: mobile communications, home entertainment, home appliance, air conditioning and business solution...

, Daewoo Electronics
Daewoo or the Daewoo Group was a major South Korean chaebol . It was founded on 22 March 1967 as Daewoo Industrial and was dismantled by the Korean government in 1999...

, and Whirlpool.

Samsung refuted the accusation, saying their products are still superior because they remove 99.999 percent of germs, rather than the 99.9–99.99 percent removed by the other washers.

Environmental concerns

The German branch of Friends of the Earth, Bund für Umwelt und Naturschutz Deutschland
Bund für Umwelt und Naturschutz Deutschland
Bund für Umwelt und Naturschutz Deutschland is a German non-governmental organisation dedicated to preserving nature and protecting the environment. The german title would be translated to something like Union for the environment and nature conservation Germany...

 (BUND), has asked consumers not to buy a new type of washing machine that uses silver nanoparticles. BUND criticized the product, claiming that considerable amounts of silver could enter sewage plants and seriously trouble the biological purification process of waste water. Friends of the Earth has also claimed that silver nanoparticles have a toxic effect on different kinds of living cells.

Samsung countered that only an accumulated amount of 0.05 grams of silver is released per machine, per year, while the released silver-ions quickly bind to non-nano-sized structures in the water.


In Silver Nanotechnologies and the Environment, environmental toxicologist Dr. Samuel Luoma claims that widespread use of nanoscale silver will challenge regulatory agencies to balance important potential benefits against the possibility of significant environmental risk. As of August 21, 2008, the Project on Emerging Nanotechnologies
Project on Emerging Nanotechnologies
The Project on Emerging Nanotechnologies was established in 2005 as a partnership between the Woodrow Wilson International Center for Scholars and the Pew Charitable Trusts. The Project is intended to address the social, political, and public safety aspects of nanotechnology...

 estimates that at least 235 manufacturer-identified silver nanotech products are publicly available.

See also

  • Silver compounds
  • Colloidal silver
    Colloidal silver
    The medical uses of silver include its incorporation into wound dressings to treat external infections, and its use as an antiseptic and disinfectant in medical appliances...

  • Environmental implications of nanotechnology
    Environmental implications of nanotechnology
    The environmental impact of nanotechnology are the possible effects that the use of nanotechnological materials and devices will have on the environment...

External links

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