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Nanotechnology is also a "double-edged sword"

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2019 Chinese Spring Festival holiday notice
January 24,2019.

2019 Chinese Spring Festival holiday notice

To All employees of the company: The annual Lunar New Year is already in sight. I wish all the staff a happy New Year and all the best! The specific arrangements for our 2019 holiday are as follows: Spring Festival holiday in 2019 (15 days): January ...

High-quality single-layer tungsten disulfide powder achieves low-cost large-area production
January 7,2019.

High-quality single-layer tungsten disulfide powder achieves low-cost large-area production

Recently, Ren Wencai, a researcher at the Advanced Carbon Materials Research Department of the National Institute of Materials Science, Institute of Materials Science, Chinese Academy of Sciences, has made new progress in the preparation of large-are...

Warmly celebrate the 2019 New Year's Day holiday
December 29,2018.

Warmly celebrate the 2019 New Year's Day holiday

New Year's Day is the beginning of our new year and the first holiday of our new year. The new weather plus the new holiday is a new good mood. Thanks to new and old customers for their support and trust in our company's nano materials. In 2019, our ...

Chinese scholars have developed a new nanowire catalyst with a diameter of only 1 nanometer.
December 17,2018.

Chinese scholars have developed a new nanowire catalyst with a diameter of only 1 nanometer.

The University of Science and Technology of China was informed that the research team of Hefei Microscale Materials Science National Research Center, Professor Zeng Jie and Professor Huang Hongwen of Hunan University have developed a new type of nano...

Nano-pigment on plastic spray becomes
November 15,2018.

Nano-pigment on plastic spray becomes

Rose gold, champagne gold, green gilt, snow silver... These beautiful and shiny "metals" are actually plastic products! The ultra-dispersive color aluminum pigment products developed by the most advanced "nano-micro coating technology" were unveiled ...

Nanotechnology is also a
November 4,2018.

Nanotechnology is also a "double-edged sword"

In our daily lives, nanotechnology will bring unexpected surprises to people. With nanometer (nm) coating, the refrigerator can be made into antibacterial, can be made into sterile tableware, can be made into self-cleaning glass and tiles without scr...

Chinese companies have successfully produced metal nanomaterials below 10 nanometers
October 29,2018.

Chinese companies have successfully produced metal nanomaterials below 10 nanometers

Through cooperation with domestic research institutes, Chinese companies have created a process oxidation method in the world after several years of trial and error and technological breakthroughs. They have taken the lead in the international produc...

China's carbon nanotube fiber research has made a major breakthrough
October 25,2018.

China's carbon nanotube fiber research has made a major breakthrough

For the first time in the world, the Chinese technical team has reported an ultra-long carbon nanotube tube bundle close to the theoretical strength of a single carbon nanotube, which has a tensile strength that exceeds all other fiber materials foun...

Nano Metal and Ceramic 3D Printing XJet Opens Manufacturing Center in Israel
October 22,2018.

Nano Metal and Ceramic 3D Printing XJet Opens Manufacturing Center in Israel

On October 22, 2018, Xjet officially opened its additive manufacturing center in Rehovot. Covering an area of 8,000 square feet and investing more than $10 million, Rehovot Technology Park is one of the world's largest metal and ceramic 3D printer ce...

Ultra-high density semiconductor type single-walled carbon nanotube horizontal array
October 20,2018.

Ultra-high density semiconductor type single-walled carbon nanotube horizontal array

ChinaPeking Universitycooperate with Chinese Academy of Sciencesto use ethanol / methanebychemical vapor deposition method to get ultrahigh-density semiconductor array level of single-walled carbon nanotube. Nowadays, as elec...

Nanotechnology is also a "double-edged sword"

November 4,2018.
In our daily lives, nanotechnology will bring unexpected surprises to people. With nanometer (nm) coating, the refrigerator can be made into antibacterial, can be made into sterile tableware, can be made into self-cleaning glass and tiles without scrubbing. Using nanotechnology to make a micro drug delivery device, it can accurately reach the lesion site and reduce the adverse reactions of the drug.

Nanomaterials are made up of ultra-fine particles of less than 100 nanometers (nm) and are unique in size and function beyond imagination. Nanotechnology is also a "double-edged sword". While bringing convenience to life, it also has potential risks.

Environmental ecological risk of nanomaterials
Researchers have used nematode model organisms to find that nanomaterials that enter the environment can be transported along the food chain, accumulating in high-level organisms and exhibiting toxic effects. It not only causes damage to the parents, but also damages future generations. In addition, physical, chemical and biological transformations occur when nanomaterials enter the environment, which changes the physicochemical properties and ultimately affects the toxicity of nanomaterials.
Studies have found that ionic strength in the environment can dedicate nanosilver to release smaller nanoparticles. This small particle size nanosilver is more toxic than the original nanosilver. The pH in the water environment and the natural organic fulvic acid have similar effects.
"Aging" is another major change in the release of nanomaterials into the environment. Nano-zinc oxide undergoes morphological changes and changes in composition during the aging process of the water environment, and flakes appear around the particles. The research team used the latest technology to analyze the physicochemical transformation of nano zinc oxide in the water environment, and found that the newly formed material mainly contains basic zinc carbonate and zinc hydroxide.
At the same time, the study also found that the water environment aging process affects the toxicity of nano zinc oxide to chlorella. Researchers say that aging zinc oxide has low toxicity to chlorella, which is due to the physical and chemical transformation of nano-zinc oxide during the aging process of water environment, gradually producing low-toxic basic zinc carbonate and zinc hydroxide, which reduces the small The toxicity of chlorella.
Using mammalian cell model studies, it has also been found that the cytotoxicity of nano zinc oxide decreases with aging, but it is surprising that its neurite outgrowth is significantly enhanced. Studies have shown that the transformation of physicochemical properties of nano-zinc oxide with the aging time plays an important role in the induction of mammalian cytotoxic effects.

Nanomaterials combined with contaminants can produce complex toxicity
Due to the high specific surface area and unique surface chemistry of nanomaterials, when it enters the environment, it can be combined with a wide range of toxic pollutants, especially in water environments. Water is more active than soil and atmosphere. When artificial nanomaterials enter water, it is more prone to changes in agglomeration state, migration and chemical/biological transformation. That is to say, there are more opportunities for nanomaterials to interact with toxic pollutants. Researcher Wu Lijun said: "The composite effect between nanomaterials and pollutants will not only affect the environmental behavior and toxic effects of pollutants, but also have a significant impact on the physical and chemical properties and biological effects of nanomaterials themselves."
The researchers also cited another example of their research. Graphene oxide can reduce the cytotoxicity and genotoxicity of the organic pollutant polychlorinated biphenyl (PCB52) and play a role in cell self-defense. However, graphene oxide also has a strong adsorption and enrichment effect on heavy metal arsenic. Another higher yield of titanium dioxide also has a strong adsorption and enrichment effect on arsenic, while low concentration of titanium dioxide can significantly increase the toxicity of arsenic. These studies provide a new reference for the potential ecological risk assessment of nanomaterials.

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