https://wikimd.org/index.php?action=history&feed=atom&title=Silver_nanoparticleSilver nanoparticle - Revision history2026-04-26T05:48:53ZRevision history for this page on the wikiMediaWiki 1.44.2https://wikimd.org/index.php?title=Silver_nanoparticle&diff=5878753&oldid=prevPrab: CSV import2024-05-30T08:36:08Z<p>CSV import</p>
<p><b>New page</b></p><div>[[file:TEM;_Silver_Nanoparticles_(5978792602).jpg|thumb|TEM; Silver Nanoparticles (5978792602)]] [[file:Walking_on_the_moon.jpg|thumb|Walking on the moon|left]] '''Silver nanoparticles''' are nanoparticles of [[silver]] with sizes ranging from 1 to 100 nanometers. These particles have unique physical, chemical, and biological properties, which make them useful in a variety of applications, including [[medicine]], [[electronics]], and [[environmental science]].<br />
<br />
== Properties ==<br />
Silver nanoparticles exhibit unique properties such as high electrical conductivity, biological activity, and optical properties. These properties are largely due to their high surface area to volume ratio and the quantum effects that dominate at the nanoscale.<br />
<br />
=== Physical Properties ===<br />
Silver nanoparticles have a high surface area to volume ratio, which enhances their reactivity. They also exhibit a phenomenon known as [[surface plasmon resonance]], which is responsible for their unique optical properties.<br />
<br />
=== Chemical Properties ===<br />
The chemical properties of silver nanoparticles are influenced by their size, shape, and surface chemistry. They are known for their excellent [[antimicrobial]] properties, which make them effective against a wide range of microorganisms, including [[bacteria]], [[viruses]], and [[fungi]].<br />
<br />
=== Biological Properties ===<br />
Silver nanoparticles have been shown to have significant [[antibacterial]], [[antiviral]], and [[antifungal]] properties. These properties are utilized in various medical applications, such as wound dressings, coatings for medical devices, and [[drug delivery]] systems.<br />
<br />
== Synthesis ==<br />
There are several methods for synthesizing silver nanoparticles, including physical, chemical, and biological methods.<br />
<br />
=== Physical Methods ===<br />
Physical methods include techniques such as [[laser ablation]], [[evaporation-condensation]], and [[ball milling]]. These methods typically require sophisticated equipment and can be expensive.<br />
<br />
=== Chemical Methods ===<br />
Chemical methods involve the reduction of silver salts using reducing agents. Common reducing agents include [[sodium borohydride]], [[citrate]], and [[ascorbic acid]]. These methods are widely used due to their simplicity and cost-effectiveness.<br />
<br />
=== Biological Methods ===<br />
Biological methods, also known as [[green synthesis]], use biological organisms such as [[plants]], [[bacteria]], and [[fungi]] to synthesize silver nanoparticles. These methods are environmentally friendly and often result in nanoparticles with unique properties.<br />
<br />
== Applications ==<br />
Silver nanoparticles have a wide range of applications due to their unique properties.<br />
<br />
=== Medical Applications ===<br />
In medicine, silver nanoparticles are used in [[wound dressings]], [[catheters]], and [[implants]] due to their antimicrobial properties. They are also being explored for use in [[drug delivery]] and [[cancer therapy]].<br />
<br />
=== Electronics ===<br />
In electronics, silver nanoparticles are used in conductive inks, [[sensors]], and [[printed electronics]] due to their high electrical conductivity.<br />
<br />
=== Environmental Applications ===<br />
Silver nanoparticles are used in water treatment and [[air purification]] systems due to their ability to kill microorganisms and degrade pollutants.<br />
<br />
== Safety and Toxicity ==<br />
While silver nanoparticles have many beneficial applications, their safety and toxicity are areas of active research. Studies have shown that they can be toxic to [[human cells]] and [[environmental organisms]] at high concentrations. Therefore, it is important to carefully evaluate their potential risks and benefits.<br />
<br />
== See Also ==<br />
* [[Nanoparticle]]<br />
* [[Nanotechnology]]<br />
* [[Antimicrobial resistance]]<br />
* [[Surface plasmon resonance]]<br />
* [[Green synthesis]]<br />
<br />
== References ==<br />
{{Reflist}}<br />
<br />
== External Links ==<br />
{{Commons category|Silver nanoparticles}}<br />
<br />
[[Category:Nanoparticles]]<br />
[[Category:Silver]]<br />
[[Category:Materials science]]<br />
[[Category:Medical technology]]<br />
[[Category:Environmental science]]<br />
<br />
{{medicine-stub}}</div>Prab