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What nanoparticles are in a swimsuit?
Some swimsuits are made with nanoparticles such as titanium dioxide or silver nanoparticles. Titanium dioxide nanoparticles can provide UV protection, while silver nanoparticles may help inhibit bacterial growth and odor.
What is the difference between silver particles and silver nanoparticles?
Silver particles typically refer to any form of silver that is in a particulate or powdered form, whereas silver nanoparticles specifically refer to silver particles that are nanoscale in size (1-100 nanometers). Silver nanoparticles have unique properties due to their small size, such as increased surface area and potential for enhanced reactivity.
How is the size of silver nanoparticles different to normal silver particles?
Silver nanoparticles are typically smaller than normal silver particles, with diameters typically ranging from 1 to 100 nanometers. This smaller size gives silver nanoparticles unique physical and chemical properties compared to larger silver particles. These properties are due to the large surface area to volume ratio of nanoparticles, leading to increased reactivity and different optical, electronic, and catalytic behavior.
Why are silver nanoparticles more effective than normal sized silver particles?
Silver nanoparticles have a larger surface area compared to normal sized silver particles, which allows for increased interaction with microbes. This leads to better antimicrobial activity due to the silver nanoparticles being able to release more silver ions. Additionally, the smaller size of nanoparticles enables them to penetrate cell walls more easily, enhancing their effectiveness in killing bacteria and other pathogens.
What are some of the environmental concerns about silver nano technology?
The main environmental concern is the amount of silver involved. Some believe it to affect living cells. There is also concern that the silver could seep into the sewer systems and affect the purification process of waste water.
What nanoparticles are in a swimsuit?
Some swimsuits are made with nanoparticles such as titanium dioxide or silver nanoparticles. Titanium dioxide nanoparticles can provide UV protection, while silver nanoparticles may help inhibit bacterial growth and odor.
What is the effect of silver nanoparticles in plastic?
Silver nanoparticles are antibacterial, and when embedded in plastics for use in the medical field, are non-toxic. This makes silver nanoparticles useful in plastic applications such as surgical catheters.
What is the difference between silver particles and silver nanoparticles?
Silver particles typically refer to any form of silver that is in a particulate or powdered form, whereas silver nanoparticles specifically refer to silver particles that are nanoscale in size (1-100 nanometers). Silver nanoparticles have unique properties due to their small size, such as increased surface area and potential for enhanced reactivity.
How is the size of silver nanoparticles different to normal silver particles?
Silver nanoparticles are typically smaller than normal silver particles, with diameters typically ranging from 1 to 100 nanometers. This smaller size gives silver nanoparticles unique physical and chemical properties compared to larger silver particles. These properties are due to the large surface area to volume ratio of nanoparticles, leading to increased reactivity and different optical, electronic, and catalytic behavior.
Why are silver nanoparticles more effective than normal sized silver particles?
Silver nanoparticles have a larger surface area compared to normal sized silver particles, which allows for increased interaction with microbes. This leads to better antimicrobial activity due to the silver nanoparticles being able to release more silver ions. Additionally, the smaller size of nanoparticles enables them to penetrate cell walls more easily, enhancing their effectiveness in killing bacteria and other pathogens.
Why are nanoparticles used in textiles?
because teh nanoparticles are so good
How do you prepare nanoparticles?
There are a number of different synthetic routes to produce silver nano particles. One of these methods is the wet chemistry method. There are also several wet chemical methods for creating silver nanoparticles. Typically, these involve the reduction of a silver salt such as silver nitrate with a reducing agent like sodium borohydride in the presence of a colloidal stabilizer. Sodium borohydride has been used with polyvinyl alcohol, poly(vinylpyrrolidone), bovine serum albumin (BSA), citrate and cellulose as stabilizing agents. In the case of BSA, the sulfur-, oxygen- and nitrogen-bearing groups mitigate the high surface energy of the nanoparticles during the reduction. The hydroxyl groups on the cellulose are reported to help stabilize the particles. Citrate and cellulose have been used to create silver nanoparticles independent of a reducing agent as well. An additional novel wet chemistry method used to create silver nanoparticles took advantage of ß-D-glucose as a reducing sugar and a starch as the stabilizer.
What are some of the environmental concerns about silver nano technology?
The main environmental concern is the amount of silver involved. Some believe it to affect living cells. There is also concern that the silver could seep into the sewer systems and affect the purification process of waste water.
What is the solution of silver nitrade?
The chemical formula for silver nitrate is AgNO3. When dissolved in water, it forms a solution of silver ions (Ag+) and nitrate ions (NO3-). This solution is commonly used in various chemical reactions, such as in the preparation of silver nanoparticles or as a reagent in laboratory experiments.
What is formed when aqueous silver nitrate solution is exposed to light?
When aqueous silver nitrate solution is exposed to light, it undergoes a photochemical reaction and forms silver nanoparticles. This is a result of the reduction of silver ions by the photons in the light. These silver nanoparticles can be visually observed as a cloudy appearance in the solution.
What is aggregation of nanoparticles?
Aggrgation of nanoparticles is where they stick together. This is undesirable in nanoparticle solutions, we want each nanoparticle to remain seperate. To combat this differing amounts of salts can be added to stop agglomeration, sodium citrate is one that is used for silver and gold nanoparticles. The zeta potential of the nanoparticle is a masure of its overall charge, ideally we want nanoparticles with a high positive or negative zeta potential as like charges repel each other and will stop nanoparticles from agglomerating.
Why are nanoparticles used in socks?
Nanoparticles are used in socks for their antimicrobial and moisture-wicking properties. They help to reduce odor-causing bacteria and keep feet dry and comfortable by enhancing the performance of the fabric.
