User:Aaqibism/Applications of nanotechnology

= Applications of nanotechnology = The applications of nanotechnology, which is technology dealing with the 100nm and below range, commonly incorporate industrial, medicinal, and energy uses. These include more durable construction materials, therapeutic drug delivery, and higher density hydrogen fuel cells that are environmentally friendly. Being that nanoparticles and nanodevices are highly versatile through modification of their physiochemical properties, they have found uses in nanoscale electronics, cancer treatments, vaccines, hydrogen fuel cells, and nanographene batteries.

Nanotechnology’s use of smaller sized materials allows for adjustment of molecules and substances at the nanoscale level, which can further enhance the mechanical properties of materials or grant access to less physically accessible areas of the body.

Construction
Nanotechnology's ability to observe and control the material world at a nanoscopic level can offer great potential for construction development. Nanotechnology can help improve the strength and durability of construction materials, including cement, steel, wood, and glass.[1]

By applying nanotechnology, materials can gain a range of new properties. The discovery of a highly ordered crystal nanostructure of amorphous C-S-H gel and the application of photocatalyst and coating technology result in a new generation of materials with properties like water resistance, self-cleaning property, wear resistance, and corrosion protection.[2] Among the new nanoengineered polymers, there are highly efficient superplasticizers for concrete and high-strength fibers with exceptional energy absorbing capacity.[2]

Experts believe that nanotechnology remains in its exploration stage and has potential in improving conventional materials such as steel. [2] Understanding the composite nanostructures of such materials and exploring nanomaterials' different applications may lead to the development of new materials with expanded properties. [2]

Due to the complexity of the equipment, nanomaterials have high cost compared to conventional materials, meaning they are not likely to feature high-volume building materials. [3]In special cases, nanotechnology can help reduce costs for complicated problems. But in most cases, the traditional method for construction remains more cost-efficient. [4] With the improvement of manufacturing technologies, the costs of applying nanotechnology into construction have been decreasing over time and are expected to decrease more. [4]

==== Nanoelectronics ==== Nanoelectronics refers to the application of nanotechnology on electronic components. Nanoelectronics aims to improve the performance of electronic devices on displays and power consumption while shrinking them. [1] Therefore, nanoelectronics can help reach the goal set up in Moore’s law[link], which predicts the continued trend of scaling down in the size of integrated circuits.

Since de Brogile wavelength in the semiconductors may be on the order of 100nm, the quantum effect at this length scale becomes essential. [2] The different device physics and novel quantum effects of electrons lead to exciting applications.[2] Therefore, nanoelectronics is a multidisciplinary area composed of quantum physics, device analysis, system integration, and circuit analysis. [2]

Nanobiotechnology
The terms nanobiotechnology and bionanotechnology refer to the combination of ideas, techniques, and sciences of biology and nanotechnology. More specifically, nanobiotechnology refers to the application of nanoscale objects for biotechnology while bionanotechnology refers to the use of biological components in nanotechnology.

The most prominent intersection of nanotechnology and biology is in the field of nanomedicine, where the use of nanoparticles and nanodevices has many clinical applications in delivering therapeutic drugs, monitoring health conditions, and diagnosing diseases. Being that much of the biological processes in the human body occur at the cellular level, the small size of nanomaterials allows for them to be used as tools that can easily circulate within the body and directly interact with intercellular and even intracellular environments. In addition, nanomaterials can have physiochemical properties that differ from their bulk form due to their size, allowing for varying chemical reactivities and diffusion effects that can be studied and changed for diversified applications.

A common application of nanomedicine is in therapeutic drug delivery, where nanoparticles containing drugs for therapeutic treatment of disease are introduced into the body and act as vessels that deliver the drugs to the targeted area. The nanoparticle vessels, which can be made of organic or synthetic components, can further be functionalized by adjusting their size, shape, surface charge, and surface attachments (proteins, coatings, polymers, etc.). The opportunity for functionalizing nanoparticles in such ways is especially beneficial when targeting areas of the body that have certain physiochemical properties that prevent the intended drug from reaching the targeted area alone; for example, some nanoparticles are able to bypass the Blood Brain Barrier to deliver therapeutic drugs to the brain. Nanoparticles have recently been used in cancer therapy treatments and vaccines.

In vivo imaging is also a key part in nanomedicine, as nanoparticles can be used as contrast agents for common imaging techniques such as computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography (PET). The ability for nanoparticles to localize and circulate in specific cells, tissues, or organs through their design can provide high contrast that results in higher sensitivity imaging, and thus can be applicable in studying pharmacokinetics or visual disease diagnosis.

Energy applications
The energy applications of nanotechnology relates to using the small size of nanoparticles to store energy more efficiently. This promotes the use of renewable energy through green nanotechnology by generating, storing, and using energy without emitting harmful greenhouse gases such as carbon dioxide.

Solar Cells
Nanoparticles used in solar cells are increasing the amount of energy absorbed from sunlight. Solar cells are currently created from layers of silicon that absorb sunlight and convert it to usable electricity. Using noble metals such as gold coated on top of silicon, researchers have found that they are able to transform energy more efficiently into electrical current. Much of the energy that is loss during this transformation is due to heat, however by using nanoparticles there is less heat emitted thus producing more electricity.

Hydrogen Fuel Cells
Nanotechnology is enabling the use of hydrogen energy at a much higher capacity. Hydrogen fuel cells, while they are not an energy source themselves, allow for storing energy from sunlight and other renewable sources in an environmentally-friendly fashion without any CO2 emissions. Some of the main drawbacks of traditional hydrogen fuel cells are that they are expensive and not durable enough for commercial uses, however by using nanoparticles both the durability and price overtime improve significantly. Furthermore, conventional fuel cells are too large to be stored in volume, but researchers have discovered that nanoblades can store greater volumes of hydrogen that can then be saved inside carbon nanotubes for long term storage.

Nanographene Batteries
Nanotechnology is giving rise to nanographene batteries that can store energy more efficiently and weigh less. Lithium-ion batteries have been the primary battery technology in electronics for the last decade, but the current limits in the technology make it difficult to densify batteries due to the potential dangers of heat and explosion. Graphene batteries being tested in experimental electric cars have promised capacities 4 times greater than current batteries with the cost being 77% lower. Additionally, graphene batteries provide stable life cycles of up to 250,000 cycles, which would allow electric vehicles and long-term products a reliable energy source for decades.